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    <link:label xlink:type="resource" xlink:label="dei_EntityAddressAddressLine3_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressAddressLine3_lbl" xml:lang="en-US" id="dei_EntityAddressAddressLine3_lbl">Entity Address, Address Line Three</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" xlink:title="AmendmentFlag" />
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    <link:label xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_CityAreaCode_lbl" xml:lang="en-US" id="dei_CityAreaCode_lbl">City Area Code</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:label="EntityAddressCityOrTown" xlink:title="EntityAddressCityOrTown" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="CurrentFiscalYearEndDate" xlink:title="CurrentFiscalYearEndDate" />
    <link:label xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="dei_CurrentFiscalYearEndDate_lbl">Current Fiscal Year End Date</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="EntityIncorporationStateCountryCode" xlink:title="EntityIncorporationStateCountryCode" />
    <link:label xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityIncorporationStateCountryCode_lbl" xml:lang="en-US" id="dei_EntityIncorporationStateCountryCode_lbl">Entity Incorporation, State or Country Code</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber" xlink:label="LocalPhoneNumber" xlink:title="LocalPhoneNumber" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:label="EntityAddressPostalZipCode" xlink:title="EntityAddressPostalZipCode" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressPostalZipCode_lbl" xml:lang="en-US" id="dei_EntityAddressPostalZipCode_lbl">Entity Address, Postal Zip Code</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince" xlink:label="EntityAddressStateOrProvince" xlink:title="EntityAddressStateOrProvince" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressStateOrProvince_lbl" xml:lang="en-US" id="dei_EntityAddressStateOrProvince_lbl">Entity Address, State or Province</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="Security12bTitle" xlink:title="Security12bTitle" />
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    <link:label xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_TradingSymbol_lbl" xml:lang="en-US" id="dei_TradingSymbol_lbl">Trading Symbol</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:label="SecurityExchangeName" xlink:title="SecurityExchangeName" />
    <link:label xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_SecurityExchangeName_lbl" xml:lang="en-US" id="dei_SecurityExchangeName_lbl">Security Exchange Name</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="EntityWellKnownSeasonedIssuer" xlink:title="EntityWellKnownSeasonedIssuer" />
    <link:label xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityWellKnownSeasonedIssuer_lbl" xml:lang="en-US" id="dei_EntityWellKnownSeasonedIssuer_lbl">Entity Well-known Seasoned Issuer</link:label>
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    <link:label xlink:type="resource" xlink:label="dei_EntityPublicFloat_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityPublicFloat_lbl" xml:lang="en-US" id="dei_EntityPublicFloat_lbl">Entity Public Float</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:title="AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_AssetRetirementObligation_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_AssetRetirementObligation_lbl2" xml:lang="en-US" id="us-gaap_AssetRetirementObligation_lbl2">Asset Retirement Obligation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligation" xlink:to="us-gaap_AssetRetirementObligation_lbl2" xlink:title="label: AssetRetirementObligation to us-gaap_AssetRetirementObligation_lbl2" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationDisclosureAbstract" xlink:to="us-gaap_AssetRetirementObligationDisclosureAbstract_lbl" xlink:title="label: AssetRetirementObligationDisclosureAbstract to us-gaap_AssetRetirementObligationDisclosureAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="AssetRetirementObligationRollForwardAnalysisRollForward" xlink:title="AssetRetirementObligationRollForwardAnalysisRollForward" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationRollForwardAnalysisRollForward" xlink:to="us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl" xlink:title="label: AssetRetirementObligationRollForwardAnalysisRollForward to us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl1" xml:lang="en-US" id="us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl1">Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationRollForwardAnalysisRollForward" xlink:to="us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl1" xlink:title="label: AssetRetirementObligationRollForwardAnalysisRollForward to us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_AssetRetirementObligationCashPaidToSettle_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_AssetRetirementObligationCashPaidToSettle_lbl1" xml:lang="en-US" id="us-gaap_AssetRetirementObligationCashPaidToSettle_lbl1">Asset Retirement Obligation, Cash Paid to Settle</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationCashPaidToSettle" xlink:to="us-gaap_AssetRetirementObligationCashPaidToSettle_lbl1" xlink:title="label: AssetRetirementObligationCashPaidToSettle to us-gaap_AssetRetirementObligationCashPaidToSettle_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_AssetsAbstract_lbl1" xml:lang="en-US" id="us-gaap_AssetsAbstract_lbl1">Assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl1" xlink:title="label: AssetsAbstract to us-gaap_AssetsAbstract_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_Assets_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_Assets_lbl2" xml:lang="en-US" id="us-gaap_Assets_lbl2">Assets</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_BalanceSheetLocationAxis_lbl" xml:lang="en-US" id="us-gaap_BalanceSheetLocationAxis_lbl">Balance Sheet Location [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingMember" xlink:label="BuildingMember" xlink:title="BuildingMember" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_lbl" xml:lang="en-US" id="us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_lbl">Reclassification of certain tax effects from accumulated other comprehensive income</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CurrentStateAndLocalTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xlink:title="label: CurrentStateAndLocalTaxExpenseBenefit to us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl" xml:lang="en-US" id="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl">Domestic tax provision (benefit)</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl1" xml:lang="en-US" id="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl1">Current Federal, State and Local, Tax Expense (Benefit)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CurrentFederalStateAndLocalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl1" xlink:title="label: CurrentFederalStateAndLocalTaxExpenseBenefit to us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefit_lbl1" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CurrentForeignTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xlink:title="label: CurrentForeignTaxExpenseBenefit to us-gaap_CurrentForeignTaxExpenseBenefit_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xml:lang="en-US" id="us-gaap_CurrentFederalTaxExpenseBenefit_lbl">Taxes currently payable, Federal</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="CustomerRelationshipsMember" xlink:title="CustomerRelationshipsMember" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CustomerRelationshipsMember" xlink:to="us-gaap_CustomerRelationshipsMember_lbl" xlink:title="label: CustomerRelationshipsMember to us-gaap_CustomerRelationshipsMember_lbl" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueAbstract" xlink:label="DisaggregationOfRevenueAbstract" xlink:title="DisaggregationOfRevenueAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl" xlink:title="label: DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease to us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl1" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl1">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:title="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" />
    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_lbl" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_lbl">Rate of compensation increase</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:title="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanBenefitObligation_lbl">Beginning projected benefit obligation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DefinedBenefitPlanBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xlink:title="label: DefinedBenefitPlanBenefitObligation to us-gaap_DefinedBenefitPlanBenefitObligation_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl1" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:title="us-gaap_DefinedBenefitPlanBenefitObligation_lbl1" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanBenefitObligation_lbl1">Ending projected benefit obligation</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DefinedBenefitPlanBenefitObligation_lbl2" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanBenefitObligation_lbl2">Defined Benefit Plan, Benefit Obligation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DefinedBenefitPlanBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanBenefitObligation_lbl2" xlink:title="label: DefinedBenefitPlanBenefitObligation to us-gaap_DefinedBenefitPlanBenefitObligation_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="DefinedBenefitPlanContributionsByEmployer" xlink:title="DefinedBenefitPlanContributionsByEmployer" />
    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl">Employer contributions</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:title="DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:title="DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl">Discount rate</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xml:lang="en-US" id="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl">Expected return on plan assets</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_DividendsPayableAmountPerShare_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DividendsPayableAmountPerShare_lbl1" xml:lang="en-US" id="us-gaap_DividendsPayableAmountPerShare_lbl1">Dividends Payable, Amount Per Share</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_DividendsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DividendsDomain_lbl" xml:lang="en-US" id="us-gaap_DividendsDomain_lbl">Dividends [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DividendsDomain" xlink:to="us-gaap_DividendsDomain_lbl" xlink:title="label: DividendsDomain to us-gaap_DividendsDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Dividends" xlink:label="Dividends" xlink:title="Dividends" />
    <link:label xlink:type="resource" xlink:label="us-gaap_Dividends_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_Dividends_lbl" xml:lang="en-US" id="us-gaap_Dividends_lbl">Dividends declared</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_Dividends_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_Dividends_lbl1" xml:lang="en-US" id="us-gaap_Dividends_lbl1">Dividends</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Dividends" xlink:to="us-gaap_Dividends_lbl1" xlink:title="label: Dividends to us-gaap_Dividends_lbl1" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DividendsAxis" xlink:to="us-gaap_DividendsAxis_lbl" xlink:title="label: DividendsAxis to us-gaap_DividendsAxis_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xml:lang="en-US" id="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl">Cash dividend declared</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DividendsPayableCurrentAndNoncurrent" xlink:to="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xlink:title="label: DividendsPayableCurrentAndNoncurrent to us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DomesticPlanMember" xlink:label="DomesticPlanMember" xlink:title="DomesticPlanMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_DomesticPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_DomesticPlanMember_lbl" xml:lang="en-US" id="us-gaap_DomesticPlanMember_lbl">Domestic Plan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DomesticPlanMember" xlink:to="us-gaap_DomesticPlanMember_lbl" xlink:title="label: DomesticPlanMember to us-gaap_DomesticPlanMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract" xlink:label="EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract" xlink:title="EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl" xml:lang="en-US" id="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl">Shares used in computation of earnings per share:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl" xlink:title="label: EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract to us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl1">Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl1" xlink:title="label: EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract to us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="EarningsPerShareBasicAndDilutedAbstract" xlink:title="EarningsPerShareBasicAndDilutedAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" xml:lang="en-US" id="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl">Earnings per share:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasicAndDilutedAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" xlink:title="label: EarningsPerShareBasicAndDilutedAbstract to us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl1">Earnings Per Share, Basic and Diluted [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasicAndDilutedAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl1" xlink:title="label: EarningsPerShareBasicAndDilutedAbstract to us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="EarningsPerShareTextBlock" xlink:title="EarningsPerShareTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_EarningsPerShareTextBlock_lbl" xml:lang="en-US" id="us-gaap_EarningsPerShareTextBlock_lbl">Earnings Per Share (EPS)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareTextBlock" xlink:to="us-gaap_EarningsPerShareTextBlock_lbl" xlink:title="label: EarningsPerShareTextBlock to us-gaap_EarningsPerShareTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EarningsPerShareTextBlock_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareTextBlock_lbl1">Earnings Per Share [Text Block]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareTextBlock" xlink:to="us-gaap_EarningsPerShareTextBlock_lbl1" xlink:title="label: EarningsPerShareTextBlock to us-gaap_EarningsPerShareTextBlock_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="EarningsPerShareDiluted" xlink:title="EarningsPerShareDiluted" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US" id="us-gaap_EarningsPerShareDiluted_lbl">Diluted earnings per share attributable to MTI (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareDiluted" xlink:to="us-gaap_EarningsPerShareDiluted_lbl" xlink:title="label: EarningsPerShareDiluted to us-gaap_EarningsPerShareDiluted_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_EarningsPerShareDiluted_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareDiluted_lbl1">Income from operations attributable to MTI (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareDiluted" xlink:to="us-gaap_EarningsPerShareDiluted_lbl1" xlink:title="label: EarningsPerShareDiluted to us-gaap_EarningsPerShareDiluted_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EarningsPerShareDiluted_lbl2" xml:lang="en-US" id="us-gaap_EarningsPerShareDiluted_lbl2">Diluted earnings per share attributable to MTI shareholders (in dollars per share)</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="EarningsPerShareBasic" xlink:title="EarningsPerShareBasic" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_EarningsPerShareBasic_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareBasic_lbl1">Income from operations attributable to MTI (in dollars per share)</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_EarningsPerShareBasic_lbl2" xml:lang="en-US" id="us-gaap_EarningsPerShareBasic_lbl2">Basic earnings per share attributable to MTI shareholders (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasic" xlink:to="us-gaap_EarningsPerShareBasic_lbl2" xlink:title="label: EarningsPerShareBasic to us-gaap_EarningsPerShareBasic_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="EarningsPerSharePolicyTextBlock" xlink:title="EarningsPerSharePolicyTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="EarningsPerShareBasicAbstract" xlink:title="EarningsPerShareBasicAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_EarningsPerShareBasicAbstract_lbl" xml:lang="en-US" id="us-gaap_EarningsPerShareBasicAbstract_lbl">Basic:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasicAbstract" xlink:to="us-gaap_EarningsPerShareBasicAbstract_lbl" xlink:title="label: EarningsPerShareBasicAbstract to us-gaap_EarningsPerShareBasicAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasicAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EarningsPerShareBasicAbstract_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareBasicAbstract_lbl1">Earnings Per Share, Basic [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareBasicAbstract" xlink:to="us-gaap_EarningsPerShareBasicAbstract_lbl1" xlink:title="label: EarningsPerShareBasicAbstract to us-gaap_EarningsPerShareBasicAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="EarningsPerShareDilutedAbstract" xlink:title="EarningsPerShareDilutedAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDilutedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_EarningsPerShareDilutedAbstract_lbl" xml:lang="en-US" id="us-gaap_EarningsPerShareDilutedAbstract_lbl">Diluted:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EarningsPerShareDilutedAbstract" xlink:to="us-gaap_EarningsPerShareDilutedAbstract_lbl" xlink:title="label: EarningsPerShareDilutedAbstract to us-gaap_EarningsPerShareDilutedAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDilutedAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EarningsPerShareDilutedAbstract_lbl1" xml:lang="en-US" id="us-gaap_EarningsPerShareDilutedAbstract_lbl1">Earnings Per Share, Diluted [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:title="EntityWideInformationRevenueFromExternalCustomerLineItems" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationSiteAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EnvironmentalRemediationSiteAxis_lbl" xml:lang="en-US" id="us-gaap_EnvironmentalRemediationSiteAxis_lbl">Environmental Remediation Site [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalRemediationSiteAxis" xlink:to="us-gaap_EnvironmentalRemediationSiteAxis_lbl" xlink:title="label: EnvironmentalRemediationSiteAxis to us-gaap_EnvironmentalRemediationSiteAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EnvironmentalRemediationObligationsAbstract" xlink:label="EnvironmentalRemediationObligationsAbstract" xlink:title="EnvironmentalRemediationObligationsAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl" xml:lang="en-US" id="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl">Site Contingency [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl" xlink:title="label: EnvironmentalRemediationObligationsAbstract to us-gaap_EnvironmentalRemediationObligationsAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl1" xml:lang="en-US" id="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl1">Environmental Remediation Obligations [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalRemediationObligationsAbstract" xlink:to="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl1" xlink:title="label: EnvironmentalRemediationObligationsAbstract to us-gaap_EnvironmentalRemediationObligationsAbstract_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_EnvironmentalCostsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EnvironmentalCostsPolicy_lbl" xml:lang="en-US" id="us-gaap_EnvironmentalCostsPolicy_lbl">Environmental</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalCostsPolicy" xlink:to="us-gaap_EnvironmentalCostsPolicy_lbl" xlink:title="label: EnvironmentalCostsPolicy to us-gaap_EnvironmentalCostsPolicy_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EnvironmentalRemediationSiteDomain" xlink:label="EnvironmentalRemediationSiteDomain" xlink:title="EnvironmentalRemediationSiteDomain" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationSiteDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EnvironmentalRemediationSiteDomain_lbl" xml:lang="en-US" id="us-gaap_EnvironmentalRemediationSiteDomain_lbl">Environmental Remediation Site [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalRemediationSiteDomain" xlink:to="us-gaap_EnvironmentalRemediationSiteDomain_lbl" xlink:title="label: EnvironmentalRemediationSiteDomain to us-gaap_EnvironmentalRemediationSiteDomain_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_EquityAndCostMethodInvestmentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EquityAndCostMethodInvestmentsPolicy_lbl" xml:lang="en-US" id="us-gaap_EquityAndCostMethodInvestmentsPolicy_lbl">Investment in Joint Ventures</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityAndCostMethodInvestmentsPolicy" xlink:to="us-gaap_EquityAndCostMethodInvestmentsPolicy_lbl" xlink:title="label: EquityAndCostMethodInvestmentsPolicy to us-gaap_EquityAndCostMethodInvestmentsPolicy_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="EquityComponentDomain" xlink:title="EquityComponentDomain" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US" id="us-gaap_EquityComponentDomain_lbl">Equity Component [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl" xlink:title="label: EquityComponentDomain to us-gaap_EquityComponentDomain_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl" xlink:title="label: EquityAbstract to us-gaap_EquityAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="EquityMethodInvestments" xlink:title="EquityMethodInvestments" />
    <link:label xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_EquityMethodInvestments_lbl" xml:lang="en-US" id="us-gaap_EquityMethodInvestments_lbl">Equity method investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityMethodInvestments" xlink:to="us-gaap_EquityMethodInvestments_lbl" xlink:title="label: EquityMethodInvestments to us-gaap_EquityMethodInvestments_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="FairValueDisclosuresAbstract" xlink:title="FairValueDisclosuresAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FairValueDisclosuresAbstract_lbl" xml:lang="en-US" id="us-gaap_FairValueDisclosuresAbstract_lbl">Fair Value of Financial Instruments [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:title="label: FairValueDisclosuresAbstract to us-gaap_FairValueDisclosuresAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xml:lang="en-US" id="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl">Fair Value Measurements, Recurring and Nonrecurring [Table]</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:title="FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FairValueMeasurementsRecurringMember_lbl" xml:lang="en-US" id="us-gaap_FairValueMeasurementsRecurringMember_lbl">Fair Value, Measurements, Recurring [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementsRecurringMember" xlink:to="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:title="label: FairValueMeasurementsRecurringMember to us-gaap_FairValueMeasurementsRecurringMember_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xml:lang="en-US" id="us-gaap_FairValueMeasurementFrequencyDomain_lbl">Fair Value, Measurement Frequency [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:title="label: FairValueMeasurementFrequencyDomain to us-gaap_FairValueMeasurementFrequencyDomain_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xml:lang="en-US" id="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl">Fair Value Hierarchy [Domain]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsGross_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsGross_lbl1">Finite-Lived Intangible Assets, Gross</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsGross" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsGross to us-gaap_FiniteLivedIntangibleAssetsGross_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:title="label: FiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl1">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:title="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl">Estimated amortization expense, thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl">Accumulated amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:title="label: FiniteLivedIntangibleAssetsAccumulatedAmortization to us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="FiniteLivedIntangibleAssetsLineItems" xlink:title="FiniteLivedIntangibleAssetsLineItems" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl">Finite-Lived Intangible Assets [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" xlink:title="label: FiniteLivedIntangibleAssetsLineItems to us-gaap_FiniteLivedIntangibleAssetsLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:title="label: FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl1">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:title="FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl">Estimated amortization expense, 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl1">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:title="FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl">Amortization Expense, Fiscal Year Maturity [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" xlink:title="label: FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract to us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl1">Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract to us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="FiniteLivedIntangibleAssetUsefulLife" xlink:title="FiniteLivedIntangibleAssetUsefulLife" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl">Weighted average useful life</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetUsefulLife" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xlink:title="label: FiniteLivedIntangibleAssetUsefulLife to us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1">Finite-Lived Intangible Asset, Useful Life</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetUsefulLife" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1" xlink:title="label: FiniteLivedIntangibleAssetUsefulLife to us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:title="FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl">Estimated amortization expense, 2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl1">Finite-Lived Intangible Assets, Amortization Expense, Year Two</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:title="FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl">Estimated amortization expense, 2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseYearFive to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl1">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:title="FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl">Estimated amortization expense, 2022</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseYearThree to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:title="FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl">Estimated amortization expense, 2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseYearFour to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl1" xml:lang="en-US" id="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl1">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsAmortizationExpenseYearFour to us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_FixedIncomeSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FixedIncomeSecuritiesMember_lbl" xml:lang="en-US" id="us-gaap_FixedIncomeSecuritiesMember_lbl">Fixed Income Securities [Member]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_lbl" xml:lang="en-US" id="us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_lbl">Cross currency rate swap</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:title="ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xml:lang="en-US" id="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl">Foreign Currency</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignPlanMember" xlink:label="ForeignPlanMember" xlink:title="ForeignPlanMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_ForeignPlanMember_lbl" xml:lang="en-US" id="us-gaap_ForeignPlanMember_lbl">International Plans [Member]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignPlanMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ForeignPlanMember_lbl1" xml:lang="en-US" id="us-gaap_ForeignPlanMember_lbl1">Foreign Plan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignPlanMember" xlink:to="us-gaap_ForeignPlanMember_lbl1" xlink:title="label: ForeignPlanMember to us-gaap_ForeignPlanMember_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl" xml:lang="en-US" id="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl">Foreign tax provision</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl1" xml:lang="en-US" id="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl1">Foreign Income Tax Expense (Benefit), Continuing Operations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ForeignIncomeTaxExpenseBenefitContinuingOperations" xlink:to="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl1" xlink:title="label: ForeignIncomeTaxExpenseBenefitContinuingOperations to us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:title="ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xml:lang="en-US" id="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl">Foreign [Abstract]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_FurnitureAndFixturesMember_lbl" xml:lang="en-US" id="us-gaap_FurnitureAndFixturesMember_lbl">Furniture and Fixtures [Member]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_FurnitureAndFixturesMember_lbl1" xml:lang="en-US" id="us-gaap_FurnitureAndFixturesMember_lbl1">Furniture and Fixtures [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="IncreaseDecreaseInAccountsReceivable" xlink:title="IncreaseDecreaseInAccountsReceivable" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="IncreaseDecreaseInOperatingCapitalAbstract" xlink:title="IncreaseDecreaseInOperatingCapitalAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreaseDecreaseInInventories" xlink:to="us-gaap_IncreaseDecreaseInInventories_lbl1" xlink:title="label: IncreaseDecreaseInInventories to us-gaap_IncreaseDecreaseInInventories_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" xlink:label="IncreaseDecreaseInPensionAndPostretirementObligations" xlink:title="IncreaseDecreaseInPensionAndPostretirementObligations" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl1" xml:lang="en-US" id="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl1">Intangible Assets, Net (Excluding Goodwill)</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:label="InventoryNet" xlink:title="InventoryNet" />
    <link:label xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="us-gaap_InventoryNet_lbl">Inventories</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InventoryNet" xlink:to="us-gaap_InventoryNet_lbl" xlink:title="label: InventoryNet to us-gaap_InventoryNet_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_InventoryNet_lbl1" xml:lang="en-US" id="us-gaap_InventoryNet_lbl1">Total inventories</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventorySuppliesNetOfReserves" xlink:label="InventorySuppliesNetOfReserves" xlink:title="InventorySuppliesNetOfReserves" />
    <link:label xlink:type="resource" xlink:label="us-gaap_InventorySuppliesNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_InventorySuppliesNetOfReserves_lbl" xml:lang="en-US" id="us-gaap_InventorySuppliesNetOfReserves_lbl">Packaging and supplies</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InventorySuppliesNetOfReserves" xlink:to="us-gaap_InventorySuppliesNetOfReserves_lbl" xlink:title="label: InventorySuppliesNetOfReserves to us-gaap_InventorySuppliesNetOfReserves_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="InventoryRawMaterialsNetOfReserves" xlink:title="InventoryRawMaterialsNetOfReserves" />
    <link:label xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xml:lang="en-US" id="us-gaap_InventoryRawMaterialsNetOfReserves_lbl">Raw materials</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InventoryRawMaterialsNetOfReserves" xlink:to="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:title="label: InventoryRawMaterialsNetOfReserves to us-gaap_InventoryRawMaterialsNetOfReserves_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract" xlink:label="InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract" xlink:title="InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAbstract" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="LondonInterbankOfferedRateLIBORMember" xlink:title="LondonInterbankOfferedRateLIBORMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xml:lang="en-US" id="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl">LIBOR [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LondonInterbankOfferedRateLIBORMember" xlink:to="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:title="label: LondonInterbankOfferedRateLIBORMember to us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="LesseeLeaseDescriptionLineItems" xlink:title="LesseeLeaseDescriptionLineItems" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl">Thereafter</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl1" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl1">Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl1" xlink:title="label: LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths to us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl">2023</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDueYearFive" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl">2024</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDue" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDue" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl">Total future minimum lease payments</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl1" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl1">Lessee, Operating Lease, Liability, Payments, Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl1" xlink:title="label: LesseeOperatingLeaseLiabilityPaymentsDue to us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:label="LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:title="LesseeOperatingLeaseLiabilityMaturityTableTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:label="LesseeOperatingLeaseDescriptionAbstract" xlink:title="LesseeOperatingLeaseDescriptionAbstract" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="LesseeLeaseDescriptionTable" xlink:title="LesseeLeaseDescriptionTable" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeLeaseDescriptionTable_lbl" xml:lang="en-US" id="us-gaap_LesseeLeaseDescriptionTable_lbl">Lessee, Lease, Description [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LesseeLeaseDescriptionTable" xlink:to="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:title="label: LesseeLeaseDescriptionTable to us-gaap_LesseeLeaseDescriptionTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:title="LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl">Less imputed interest</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl1" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl1">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl">2022</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:title="LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xml:lang="en-US" id="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl">2021</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="LettersOfCreditOutstandingAmount" xlink:title="LettersOfCreditOutstandingAmount" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LandMember" xlink:label="LandMember" xlink:title="LandMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LandMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LandMember_lbl" xml:lang="en-US" id="us-gaap_LandMember_lbl">Land [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LandMember" xlink:to="us-gaap_LandMember_lbl" xlink:title="label: LandMember to us-gaap_LandMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCostAbstract" xlink:label="LeaseCostAbstract" xlink:title="LeaseCostAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeaseCostAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LeaseCostAbstract_lbl" xml:lang="en-US" id="us-gaap_LeaseCostAbstract_lbl">Operating Lease Cost [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeaseCostAbstract" xlink:to="us-gaap_LeaseCostAbstract_lbl" xlink:title="label: LeaseCostAbstract to us-gaap_LeaseCostAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCost" xlink:label="LeaseCost" xlink:title="LeaseCost" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_LeaseCost_lbl" xml:lang="en-US" id="us-gaap_LeaseCost_lbl">Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeaseCost" xlink:to="us-gaap_LeaseCost_lbl" xlink:title="label: LeaseCost to us-gaap_LeaseCost_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LeaseCost_lbl1" xml:lang="en-US" id="us-gaap_LeaseCost_lbl1">Lease, Cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeaseCost" xlink:to="us-gaap_LeaseCost_lbl1" xlink:title="label: LeaseCost to us-gaap_LeaseCost_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCostTableTextBlock" xlink:label="LeaseCostTableTextBlock" xlink:title="LeaseCostTableTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_LeaseCostTableTextBlock_lbl" xml:lang="en-US" id="us-gaap_LeaseCostTableTextBlock_lbl">Components of Lease Cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeaseCostTableTextBlock" xlink:to="us-gaap_LeaseCostTableTextBlock_lbl" xlink:title="label: LeaseCostTableTextBlock to us-gaap_LeaseCostTableTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LeaseCostTableTextBlock_lbl1" xml:lang="en-US" id="us-gaap_LeaseCostTableTextBlock_lbl1">Lease, Cost [Table Text Block]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeaseCostTableTextBlock" xlink:to="us-gaap_LeaseCostTableTextBlock_lbl1" xlink:title="label: LeaseCostTableTextBlock to us-gaap_LeaseCostTableTextBlock_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="LeaseAndRentalExpense" xlink:title="LeaseAndRentalExpense" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeaseAndRentalExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LeaseAndRentalExpense_lbl" xml:lang="en-US" id="us-gaap_LeaseAndRentalExpense_lbl">Rent expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeaseAndRentalExpense" xlink:to="us-gaap_LeaseAndRentalExpense_lbl" xlink:title="label: LeaseAndRentalExpense to us-gaap_LeaseAndRentalExpense_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesOfLesseeDisclosureTextBlock" xlink:label="LeasesOfLesseeDisclosureTextBlock" xlink:title="LeasesOfLesseeDisclosureTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl" xml:lang="en-US" id="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl">Leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeasesOfLesseeDisclosureTextBlock" xlink:to="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl" xlink:title="label: LeasesOfLesseeDisclosureTextBlock to us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl1" xml:lang="en-US" id="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl1">Leases of Lessee Disclosure [Text Block]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeasesOfLesseeDisclosureTextBlock" xlink:to="us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl1" xlink:title="label: LeasesOfLesseeDisclosureTextBlock to us-gaap_LeasesOfLesseeDisclosureTextBlock_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="LeasesAbstract" xlink:title="LeasesAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LeasesAbstract_lbl" xml:lang="en-US" id="us-gaap_LeasesAbstract_lbl">Leases [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LeasesAbstract" xlink:to="us-gaap_LeasesAbstract_lbl" xlink:title="label: LeasesAbstract to us-gaap_LeasesAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="LetterOfCreditMember" xlink:title="LetterOfCreditMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LetterOfCreditMember_lbl" xml:lang="en-US" id="us-gaap_LetterOfCreditMember_lbl">Letter of Credit [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LetterOfCreditMember" xlink:to="us-gaap_LetterOfCreditMember_lbl" xlink:title="label: LetterOfCreditMember to us-gaap_LetterOfCreditMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="LiabilitiesAndStockholdersEquityAbstract" xlink:title="LiabilitiesAndStockholdersEquityAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US" id="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl">LIABILITIES AND SHAREHOLDERS' EQUITY</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:title="label: LiabilitiesAndStockholdersEquityAbstract to us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="Liabilities" xlink:title="Liabilities" />
    <link:label xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_Liabilities_lbl" xml:lang="en-US" id="us-gaap_Liabilities_lbl">Total liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Liabilities" xlink:to="us-gaap_Liabilities_lbl" xlink:title="label: Liabilities to us-gaap_Liabilities_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_Liabilities_lbl1" xml:lang="en-US" id="us-gaap_Liabilities_lbl1">Liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Liabilities" xlink:to="us-gaap_Liabilities_lbl1" xlink:title="label: Liabilities to us-gaap_Liabilities_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="LiabilitiesAndStockholdersEquity" xlink:title="LiabilitiesAndStockholdersEquity" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="us-gaap_LiabilitiesAndStockholdersEquity_lbl">Total liabilities and shareholders' equity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:title="label: LiabilitiesAndStockholdersEquity to us-gaap_LiabilitiesAndStockholdersEquity_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LiabilitiesAndStockholdersEquity_lbl1" xml:lang="en-US" id="us-gaap_LiabilitiesAndStockholdersEquity_lbl1">Liabilities and Equity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl1" xlink:title="label: LiabilitiesAndStockholdersEquity to us-gaap_LiabilitiesAndStockholdersEquity_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="LiabilitiesCurrentAbstract" xlink:title="LiabilitiesCurrentAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="us-gaap_LiabilitiesCurrentAbstract_lbl">Current liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:title="label: LiabilitiesCurrentAbstract to us-gaap_LiabilitiesCurrentAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="LiabilitiesCurrent" xlink:title="LiabilitiesCurrent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="us-gaap_LiabilitiesCurrent_lbl">Total current liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" xlink:title="label: LiabilitiesCurrent to us-gaap_LiabilitiesCurrent_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LiabilitiesCurrent_lbl1" xml:lang="en-US" id="us-gaap_LiabilitiesCurrent_lbl1">Liabilities, Current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl1" xlink:title="label: LiabilitiesCurrent to us-gaap_LiabilitiesCurrent_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCredit" xlink:label="LineOfCredit" xlink:title="LineOfCredit" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_LineOfCredit_lbl" xml:lang="en-US" id="us-gaap_LineOfCredit_lbl">Uncommitted short-term bank credit lines, amount outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" xlink:title="label: LineOfCredit to us-gaap_LineOfCredit_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LineOfCredit_lbl1" xml:lang="en-US" id="us-gaap_LineOfCredit_lbl1">Long-term Line of Credit</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl1" xlink:title="label: LineOfCredit to us-gaap_LineOfCredit_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="LineOfCreditFacilityMaximumBorrowingCapacity" xlink:title="LineOfCreditFacilityMaximumBorrowingCapacity" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US" id="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl">Maximum borrowing capacity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:title="label: LineOfCreditFacilityMaximumBorrowingCapacity to us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl1" xml:lang="en-US" id="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl1">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl1" xlink:title="label: LineOfCreditFacilityMaximumBorrowingCapacity to us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding" xlink:label="LineOfCreditFacilityFairValueOfAmountOutstanding" xlink:title="LineOfCreditFacilityFairValueOfAmountOutstanding" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_lbl" xml:lang="en-US" id="us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_lbl">Line of credit outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LineOfCreditFacilityFairValueOfAmountOutstanding" xlink:to="us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_lbl" xlink:title="label: LineOfCreditFacilityFairValueOfAmountOutstanding to us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LitigationSettlementExpense" xlink:label="LitigationSettlementExpense" xlink:title="LitigationSettlementExpense" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LitigationSettlementExpense_lbl" xml:lang="en-US" id="us-gaap_LitigationSettlementExpense_lbl">Litigation expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LitigationSettlementExpense" xlink:to="us-gaap_LitigationSettlementExpense_lbl" xlink:title="label: LitigationSettlementExpense to us-gaap_LitigationSettlementExpense_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_LitigationSettlementExpense_lbl1" xml:lang="en-US" id="us-gaap_LitigationSettlementExpense_lbl1">Litigation expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LitigationSettlementExpense" xlink:to="us-gaap_LitigationSettlementExpense_lbl1" xlink:title="label: LitigationSettlementExpense to us-gaap_LitigationSettlementExpense_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="LongTermDebtNoncurrent" xlink:title="LongTermDebtNoncurrent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtNoncurrent_lbl">Long-term debt, net of unamortized discount and deferred financing costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl" xlink:title="label: LongTermDebtNoncurrent to us-gaap_LongTermDebtNoncurrent_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtNoncurrent_lbl1" xml:lang="en-US" id="us-gaap_LongTermDebtNoncurrent_lbl1">Long-term debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl1" xlink:title="label: LongTermDebtNoncurrent to us-gaap_LongTermDebtNoncurrent_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:title="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl">2020</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl1" xlink:title="label: LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths to us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:title="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl">2022</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl1" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl1">Long-term Debt, Maturities, Repayments of Principal in Year Three</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl1" xlink:title="label: LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree to us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="LongTermDebtCurrent" xlink:title="LongTermDebtCurrent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtCurrent_lbl">Current maturities of long-term debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_lbl" xlink:title="label: LongTermDebtCurrent to us-gaap_LongTermDebtCurrent_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtCurrent_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_LongTermDebtCurrent_lbl1" xml:lang="en-US" id="us-gaap_LongTermDebtCurrent_lbl1">Less: Current maturities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_lbl1" xlink:title="label: LongTermDebtCurrent to us-gaap_LongTermDebtCurrent_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtCurrent_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LongTermDebtCurrent_lbl2" xml:lang="en-US" id="us-gaap_LongTermDebtCurrent_lbl2">Long-term Debt, Current Maturities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_lbl2" xlink:title="label: LongTermDebtCurrent to us-gaap_LongTermDebtCurrent_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:title="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:title="label: LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo to us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl1" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl1">Long-term Debt, Maturities, Repayments of Principal in Year Two</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl1" xlink:title="label: LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo to us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:title="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl">2024</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl1" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl1">Long-term Debt, Maturities, Repayments of Principal in Year Five</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl1" xlink:title="label: LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive to us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:title="LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl">Thereafter</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl1" xml:lang="en-US" id="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl1">Long-term Debt, Maturities, Repayments of Principal after Year Five</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl1" xlink:title="label: LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive to us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="LossContingenciesLineItems" xlink:title="LossContingenciesLineItems" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingenciesLineItems_lbl" xml:lang="en-US" id="us-gaap_LossContingenciesLineItems_lbl">Loss Contingencies [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingenciesLineItems" xlink:to="us-gaap_LossContingenciesLineItems_lbl" xlink:title="label: LossContingenciesLineItems to us-gaap_LossContingenciesLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyClaimsDismissedNumber" xlink:label="LossContingencyClaimsDismissedNumber" xlink:title="LossContingencyClaimsDismissedNumber" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingencyClaimsDismissedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingencyClaimsDismissedNumber_lbl" xml:lang="en-US" id="us-gaap_LossContingencyClaimsDismissedNumber_lbl">Number of cases dismissed</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyClaimsDismissedNumber" xlink:to="us-gaap_LossContingencyClaimsDismissedNumber_lbl" xlink:title="label: LossContingencyClaimsDismissedNumber to us-gaap_LossContingencyClaimsDismissedNumber_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyClaimsSettledNumber" xlink:label="LossContingencyClaimsSettledNumber" xlink:title="LossContingencyClaimsSettledNumber" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingencyClaimsSettledNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingencyClaimsSettledNumber_lbl" xml:lang="en-US" id="us-gaap_LossContingencyClaimsSettledNumber_lbl">Number of lawsuits settled</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyClaimsSettledNumber" xlink:to="us-gaap_LossContingencyClaimsSettledNumber_lbl" xlink:title="label: LossContingencyClaimsSettledNumber to us-gaap_LossContingencyClaimsSettledNumber_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="LossContingenciesByNatureOfContingencyAxis" xlink:title="LossContingenciesByNatureOfContingencyAxis" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xml:lang="en-US" id="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl">Loss Contingency Nature [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingenciesByNatureOfContingencyAxis" xlink:to="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:title="label: LossContingenciesByNatureOfContingencyAxis to us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="LossContingenciesTable" xlink:title="LossContingenciesTable" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingenciesTable_lbl" xml:lang="en-US" id="us-gaap_LossContingenciesTable_lbl">Loss Contingencies [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl" xlink:title="label: LossContingenciesTable to us-gaap_LossContingenciesTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNewClaimsFiledNumber" xlink:label="LossContingencyNewClaimsFiledNumber" xlink:title="LossContingencyNewClaimsFiledNumber" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingencyNewClaimsFiledNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingencyNewClaimsFiledNumber_lbl" xml:lang="en-US" id="us-gaap_LossContingencyNewClaimsFiledNumber_lbl">Number of new cases filed</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyNewClaimsFiledNumber" xlink:to="us-gaap_LossContingencyNewClaimsFiledNumber_lbl" xlink:title="label: LossContingencyNewClaimsFiledNumber to us-gaap_LossContingencyNewClaimsFiledNumber_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber" xlink:label="LossContingencyPendingClaimsNumber" xlink:title="LossContingencyPendingClaimsNumber" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingencyPendingClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingencyPendingClaimsNumber_lbl" xml:lang="en-US" id="us-gaap_LossContingencyPendingClaimsNumber_lbl">Number of pending cases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyPendingClaimsNumber" xlink:to="us-gaap_LossContingencyPendingClaimsNumber_lbl" xlink:title="label: LossContingencyPendingClaimsNumber to us-gaap_LossContingencyPendingClaimsNumber_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyInformationAboutLitigationMattersAbstract" xlink:label="LossContingencyInformationAboutLitigationMattersAbstract" xlink:title="LossContingencyInformationAboutLitigationMattersAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_lbl" xml:lang="en-US" id="us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_lbl">Loss Contingency, Information about Litigation Matters [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyInformationAboutLitigationMattersAbstract" xlink:to="us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_lbl" xlink:title="label: LossContingencyInformationAboutLitigationMattersAbstract to us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_LossContingencyNatureDomain_lbl" xml:lang="en-US" id="us-gaap_LossContingencyNatureDomain_lbl">Loss Contingency, Nature [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyNatureDomain" xlink:to="us-gaap_LossContingencyNatureDomain_lbl" xlink:title="label: LossContingencyNatureDomain to us-gaap_LossContingencyNatureDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="MachineryAndEquipmentMember" xlink:title="MachineryAndEquipmentMember" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MachineryAndEquipmentMember" xlink:to="us-gaap_MachineryAndEquipmentMember_lbl" xlink:title="label: MachineryAndEquipmentMember to us-gaap_MachineryAndEquipmentMember_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MachineryAndEquipmentMember_lbl1" xml:lang="en-US" id="us-gaap_MachineryAndEquipmentMember_lbl1">Machinery and Equipment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MachineryAndEquipmentMember" xlink:to="us-gaap_MachineryAndEquipmentMember_lbl1" xlink:title="label: MachineryAndEquipmentMember to us-gaap_MachineryAndEquipmentMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ManufacturingFacilityMember" xlink:label="ManufacturingFacilityMember" xlink:title="ManufacturingFacilityMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ManufacturingFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_ManufacturingFacilityMember_lbl" xml:lang="en-US" id="us-gaap_ManufacturingFacilityMember_lbl">PCC Production Facilities [Member]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_ManufacturingFacilityMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ManufacturingFacilityMember_lbl1" xml:lang="en-US" id="us-gaap_ManufacturingFacilityMember_lbl1">Manufacturing Facility [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ManufacturingFacilityMember" xlink:to="us-gaap_ManufacturingFacilityMember_lbl1" xlink:title="label: ManufacturingFacilityMember to us-gaap_ManufacturingFacilityMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MaturitiesOfLongTermDebtAbstract" xlink:label="MaturitiesOfLongTermDebtAbstract" xlink:title="MaturitiesOfLongTermDebtAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MaturitiesOfLongTermDebtAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MaturitiesOfLongTermDebtAbstract_lbl" xml:lang="en-US" id="us-gaap_MaturitiesOfLongTermDebtAbstract_lbl">Long-term debt maturities [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MaturitiesOfLongTermDebtAbstract" xlink:to="us-gaap_MaturitiesOfLongTermDebtAbstract_lbl" xlink:title="label: MaturitiesOfLongTermDebtAbstract to us-gaap_MaturitiesOfLongTermDebtAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MineralMember" xlink:label="MineralMember" xlink:title="MineralMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MineralMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_MineralMember_lbl" xml:lang="en-US" id="us-gaap_MineralMember_lbl">Basic Minerals [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MineralMember" xlink:to="us-gaap_MineralMember_lbl" xlink:title="label: MineralMember to us-gaap_MineralMember_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MineralMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MineralMember_lbl1" xml:lang="en-US" id="us-gaap_MineralMember_lbl1">Mineral [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MineralMember" xlink:to="us-gaap_MineralMember_lbl1" xlink:title="label: MineralMember to us-gaap_MineralMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:title="MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xml:lang="en-US" id="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl">Dividends paid to non-controlling interests</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:to="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xlink:title="label: MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders to us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl1" xml:lang="en-US" id="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl1">Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:to="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl1" xlink:title="label: MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders to us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterest" xlink:label="MinorityInterest" xlink:title="MinorityInterest" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_MinorityInterest_lbl" xml:lang="en-US" id="us-gaap_MinorityInterest_lbl">Non-controlling interests</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MinorityInterest" xlink:to="us-gaap_MinorityInterest_lbl" xlink:title="label: MinorityInterest to us-gaap_MinorityInterest_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MinorityInterest_lbl1" xml:lang="en-US" id="us-gaap_MinorityInterest_lbl1">Stockholders' Equity Attributable to Noncontrolling Interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MinorityInterest" xlink:to="us-gaap_MinorityInterest_lbl1" xlink:title="label: MinorityInterest to us-gaap_MinorityInterest_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="MinorityInterestDecreaseFromRedemptions" xlink:title="MinorityInterestDecreaseFromRedemptions" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MinorityInterestDecreaseFromRedemptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MinorityInterestDecreaseFromRedemptions_lbl" xml:lang="en-US" id="us-gaap_MinorityInterestDecreaseFromRedemptions_lbl">Acquisition of non-controlling interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MinorityInterestDecreaseFromRedemptions" xlink:to="us-gaap_MinorityInterestDecreaseFromRedemptions_lbl" xlink:title="label: MinorityInterestDecreaseFromRedemptions to us-gaap_MinorityInterestDecreaseFromRedemptions_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="MovementInValuationAllowancesAndReservesRollForward" xlink:title="MovementInValuationAllowancesAndReservesRollForward" />
    <link:label xlink:type="resource" xlink:label="us-gaap_MovementInValuationAllowancesAndReservesRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_MovementInValuationAllowancesAndReservesRollForward_lbl" xml:lang="en-US" id="us-gaap_MovementInValuationAllowancesAndReservesRollForward_lbl">Valuation and Qualifying Accounts Disclosure [Roll Forward]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MovementInValuationAllowancesAndReservesRollForward" xlink:to="us-gaap_MovementInValuationAllowancesAndReservesRollForward_lbl" xlink:title="label: MovementInValuationAllowancesAndReservesRollForward to us-gaap_MovementInValuationAllowancesAndReservesRollForward_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="NoncurrentAssets" xlink:title="NoncurrentAssets" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NoncurrentAssets_lbl" xml:lang="en-US" id="us-gaap_NoncurrentAssets_lbl">Long-lived assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncurrentAssets" xlink:to="us-gaap_NoncurrentAssets_lbl" xlink:title="label: NoncurrentAssets to us-gaap_NoncurrentAssets_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="NetCashProvidedByUsedInOperatingActivities" xlink:title="NetCashProvidedByUsedInOperatingActivities" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl">Net cash provided by operating activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:title="label: NetCashProvidedByUsedInOperatingActivities to us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl1" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl1">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl1" xlink:title="label: NetCashProvidedByUsedInOperatingActivities to us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="NetCashProvidedByUsedInInvestingActivities" xlink:title="NetCashProvidedByUsedInInvestingActivities" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl">Net cash used in investing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:title="label: NetCashProvidedByUsedInInvestingActivities to us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl1" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl1">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl1" xlink:title="label: NetCashProvidedByUsedInInvestingActivities to us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:title="NetCashProvidedByUsedInInvestingActivitiesAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl">Investing Activities:</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:title="NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl">Operating Activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:title="label: NetCashProvidedByUsedInOperatingActivitiesAbstract to us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="NetCashProvidedByUsedInFinancingActivities" xlink:title="NetCashProvidedByUsedInFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl">Net cash provided by (used in) financing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:title="label: NetCashProvidedByUsedInFinancingActivities to us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl1" xml:lang="en-US" id="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl1">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl1" xlink:title="label: NetCashProvidedByUsedInFinancingActivities to us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="NetIncomeLoss" xlink:title="NetIncomeLoss" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="us-gaap_NetIncomeLoss_lbl">Net income attributable to MTI</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl" xlink:title="label: NetIncomeLoss to us-gaap_NetIncomeLoss_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_NetIncomeLoss_lbl1" xml:lang="en-US" id="us-gaap_NetIncomeLoss_lbl1">Net income attributable to Minerals Technologies Inc. (MTI)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl1" xlink:title="label: NetIncomeLoss to us-gaap_NetIncomeLoss_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_NetIncomeLoss_lbl2" xml:lang="en-US" id="us-gaap_NetIncomeLoss_lbl2">Net income attributable to Minerals Technologies Inc. (MTI)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl2" xlink:title="label: NetIncomeLoss to us-gaap_NetIncomeLoss_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:title="NetCashProvidedByUsedInFinancingActivitiesAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:title="label: NetCashProvidedByUsedInFinancingActivitiesAbstract to us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="NetIncomeLossAttributableToNoncontrollingInterest" xlink:title="NetIncomeLossAttributableToNoncontrollingInterest" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl">Less: Net income attributable to non-controlling interests</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl1" xml:lang="en-US" id="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl1">Less: Net income attributable to non-controlling interests</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl1" xlink:title="label: NetIncomeLossAttributableToNoncontrollingInterest to us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:title="NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xml:lang="en-US" id="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl">New Accounting Pronouncements or Change in Accounting Principle [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:to="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" xlink:title="label: NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems to us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:title="NewAccountingPronouncementsPolicyPolicyTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xml:lang="en-US" id="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl">Recently Issued Accounting Standards</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:title="label: NewAccountingPronouncementsPolicyPolicyTextBlock to us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl1" xml:lang="en-US" id="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl1">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl1" xlink:title="label: NewAccountingPronouncementsPolicyPolicyTextBlock to us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementMember" xlink:label="NewAccountingPronouncementMember" xlink:title="NewAccountingPronouncementMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NewAccountingPronouncementMember_lbl" xml:lang="en-US" id="us-gaap_NewAccountingPronouncementMember_lbl">Adjustments for New Accounting Pronouncement [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NewAccountingPronouncementMember" xlink:to="us-gaap_NewAccountingPronouncementMember_lbl" xlink:title="label: NewAccountingPronouncementMember to us-gaap_NewAccountingPronouncementMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:title="NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xml:lang="en-US" id="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl">New Accounting Pronouncements or Change in Accounting Principle [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:to="us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" xlink:title="label: NewAccountingPronouncementsOrChangeInAccountingPrincipleTable to us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:label="NoncashInvestingAndFinancingItemsAbstract" xlink:title="NoncashInvestingAndFinancingItemsAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xml:lang="en-US" id="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl">Non-cash financing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:title="label: NoncashInvestingAndFinancingItemsAbstract to us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1" xml:lang="en-US" id="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1">Noncash Investing and Financing Items [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1" xlink:title="label: NoncashInvestingAndFinancingItemsAbstract to us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="NonoperatingIncomeExpense" xlink:title="NonoperatingIncomeExpense" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US" id="us-gaap_NonoperatingIncomeExpense_lbl">Total non-operating deductions, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl" xlink:title="label: NonoperatingIncomeExpense to us-gaap_NonoperatingIncomeExpense_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_NonoperatingIncomeExpense_lbl1" xml:lang="en-US" id="us-gaap_NonoperatingIncomeExpense_lbl1">Non-operating deductions, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl1" xlink:title="label: NonoperatingIncomeExpense to us-gaap_NonoperatingIncomeExpense_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NonoperatingIncomeExpense_lbl2" xml:lang="en-US" id="us-gaap_NonoperatingIncomeExpense_lbl2">Nonoperating Income (Expense)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl2" xlink:title="label: NonoperatingIncomeExpense to us-gaap_NonoperatingIncomeExpense_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="NumberOfReportableSegments" xlink:title="NumberOfReportableSegments" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NumberOfReportableSegments_lbl" xml:lang="en-US" id="us-gaap_NumberOfReportableSegments_lbl">Number of reportable segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfReportableSegments" xlink:to="us-gaap_NumberOfReportableSegments_lbl" xlink:title="label: NumberOfReportableSegments to us-gaap_NumberOfReportableSegments_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" xlink:label="NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" xlink:title="NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" xml:lang="en-US" id="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl">Capital contribution from non-controlling interests</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" xlink:to="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" xlink:title="label: NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance to us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl1" xml:lang="en-US" id="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl1">Noncontrolling Interest, Increase from Subsidiary Equity Issuance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" xlink:to="us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl1" xlink:title="label: NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance to us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="NoncontrollingInterestMember" xlink:title="NoncontrollingInterestMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_NoncontrollingInterestMember_lbl" xml:lang="en-US" id="us-gaap_NoncontrollingInterestMember_lbl">Non-controlling Interests [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncontrollingInterestMember" xlink:to="us-gaap_NoncontrollingInterestMember_lbl" xlink:title="label: NoncontrollingInterestMember to us-gaap_NoncontrollingInterestMember_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_NoncontrollingInterestMember_lbl1" xml:lang="en-US" id="us-gaap_NoncontrollingInterestMember_lbl1">Noncontrolling Interest [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoncontrollingInterestMember" xlink:to="us-gaap_NoncontrollingInterestMember_lbl1" xlink:title="label: NoncontrollingInterestMember to us-gaap_NoncontrollingInterestMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:label="OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:title="OperatingLeaseLiabilitiesPaymentsDueAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl">Future Minimum Lease Payments [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:to="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:title="label: OperatingLeaseLiabilitiesPaymentsDueAbstract to us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:label="OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:title="OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl">Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:title="label: OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList to us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:title="OperatingLeaseWeightedAverageRemainingLeaseTerm1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl">Weighted-average remaining operating lease term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:title="label: OperatingLeaseWeightedAverageRemainingLeaseTerm1 to us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="OperatingLeaseRightOfUseAsset" xlink:title="OperatingLeaseRightOfUseAsset" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseRightOfUseAsset_lbl">Right-of-use assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:title="label: OperatingLeaseRightOfUseAsset to us-gaap_OperatingLeaseRightOfUseAsset_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeaseRightOfUseAsset_lbl1">Right-of-use asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl1" xlink:title="label: OperatingLeaseRightOfUseAsset to us-gaap_OperatingLeaseRightOfUseAsset_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="OperatingLeaseCost" xlink:title="OperatingLeaseCost" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseCost_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseCost_lbl">Operating lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseCost" xlink:to="us-gaap_OperatingLeaseCost_lbl" xlink:title="label: OperatingLeaseCost to us-gaap_OperatingLeaseCost_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:label="OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:title="OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl">Operating Lease, Liability, Statement of Financial Position [Extensible List]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:to="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:title="label: OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList to us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="OperatingSegmentsMember" xlink:title="OperatingSegmentsMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_OperatingSegmentsMember_lbl" xml:lang="en-US" id="us-gaap_OperatingSegmentsMember_lbl">Reportable Segments [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingSegmentsMember" xlink:to="us-gaap_OperatingSegmentsMember_lbl" xlink:title="label: OperatingSegmentsMember to us-gaap_OperatingSegmentsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingSegmentsMember_lbl1" xml:lang="en-US" id="us-gaap_OperatingSegmentsMember_lbl1">Operating Segments [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingSegmentsMember" xlink:to="us-gaap_OperatingSegmentsMember_lbl1" xlink:title="label: OperatingSegmentsMember to us-gaap_OperatingSegmentsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="OperatingLeaseWeightedAverageDiscountRatePercent" xlink:title="OperatingLeaseWeightedAverageDiscountRatePercent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl">Weighted-average operating leases discount rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseWeightedAverageDiscountRatePercent" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:title="label: OperatingLeaseWeightedAverageDiscountRatePercent to us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="OperatingIncomeLoss" xlink:title="OperatingIncomeLoss" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="us-gaap_OperatingIncomeLoss_lbl">Income from operations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl" xlink:title="label: OperatingIncomeLoss to us-gaap_OperatingIncomeLoss_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingIncomeLoss_lbl1" xml:lang="en-US" id="us-gaap_OperatingIncomeLoss_lbl1">Income from operations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl1" xlink:title="label: OperatingIncomeLoss to us-gaap_OperatingIncomeLoss_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingIncomeLoss_lbl2" xml:lang="en-US" id="us-gaap_OperatingIncomeLoss_lbl2">Consolidated income from operations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl2" xlink:title="label: OperatingIncomeLoss to us-gaap_OperatingIncomeLoss_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:label="OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:title="OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl">Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:to="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:title="label: OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList to us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLossAbstract" xlink:label="OperatingIncomeLossAbstract" xlink:title="OperatingIncomeLossAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingIncomeLossAbstract_lbl" xml:lang="en-US" id="us-gaap_OperatingIncomeLossAbstract_lbl">Operating Income (Loss) [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingIncomeLossAbstract" xlink:to="us-gaap_OperatingIncomeLossAbstract_lbl" xlink:title="label: OperatingIncomeLossAbstract to us-gaap_OperatingIncomeLossAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="OperatingLeaseLiabilityCurrent" xlink:title="OperatingLeaseLiabilityCurrent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilityCurrent_lbl">Operating liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:title="label: OperatingLeaseLiabilityCurrent to us-gaap_OperatingLeaseLiabilityCurrent_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingLeaseLiabilityCurrent_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilityCurrent_lbl1">Lease liability - current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl1" xlink:title="label: OperatingLeaseLiabilityCurrent to us-gaap_OperatingLeaseLiabilityCurrent_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="OperatingLeaseLiabilityNoncurrent" xlink:title="OperatingLeaseLiabilityNoncurrent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl">Lease liability - non-current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiabilityNoncurrent" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:title="label: OperatingLeaseLiabilityNoncurrent to us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:label="OperatingLeasePayments" xlink:title="OperatingLeasePayments" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasePayments_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasePayments_lbl">Cash paid for amounts included in the measurement of lease liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasePayments" xlink:to="us-gaap_OperatingLeasePayments_lbl" xlink:title="label: OperatingLeasePayments to us-gaap_OperatingLeasePayments_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="OperatingLeaseLiability" xlink:title="OperatingLeaseLiability" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_OperatingLeaseLiability_lbl" xml:lang="en-US" id="us-gaap_OperatingLeaseLiability_lbl">Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl" xlink:title="label: OperatingLeaseLiability to us-gaap_OperatingLeaseLiability_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeaseLiability_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeaseLiability_lbl1">Operating Lease, Liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl1" xlink:title="label: OperatingLeaseLiability to us-gaap_OperatingLeaseLiability_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="OperatingLossCarryforwardsLineItems" xlink:title="OperatingLossCarryforwardsLineItems" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwardsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLossCarryforwardsLineItems_lbl" xml:lang="en-US" id="us-gaap_OperatingLossCarryforwardsLineItems_lbl">Operating Loss Carryforwards [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwardsLineItems" xlink:to="us-gaap_OperatingLossCarryforwardsLineItems_lbl" xlink:title="label: OperatingLossCarryforwardsLineItems to us-gaap_OperatingLossCarryforwardsLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:title="OperatingLeasesFutureMinimumPaymentsDueInTwoYears" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl">2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInTwoYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl1">Operating Leases, Future Minimum Payments, Due in Two Years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl1" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInTwoYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:label="OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:title="OperatingLeasesFutureMinimumPaymentsDueAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl">Minimum Lease Payments under Non-cancellable Operating Leases [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueAbstract to us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:title="OperatingLeasesFutureMinimumPaymentsDueInFiveYears" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInFiveYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl1">Operating Leases, Future Minimum Payments, Due in Five Years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl1" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInFiveYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:title="OperatingLeasesFutureMinimumPaymentsDueInFourYears" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInFourYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl1">Operating Leases, Future Minimum Payments, Due in Four Years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl1" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInFourYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="OperatingLossCarryforwards" xlink:title="OperatingLossCarryforwards" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLossCarryforwards_lbl" xml:lang="en-US" id="us-gaap_OperatingLossCarryforwards_lbl">Deferred tax assets arising from tax loss carry forwards which will be realized through future operations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwards" xlink:to="us-gaap_OperatingLossCarryforwards_lbl" xlink:title="label: OperatingLossCarryforwards to us-gaap_OperatingLossCarryforwards_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:title="OperatingLeasesFutureMinimumPaymentsDueInThreeYears" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInThreeYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl1">Operating Leases, Future Minimum Payments, Due in Three Years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl1" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDueInThreeYears to us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="OperatingLeasesFutureMinimumPaymentsDue" xlink:title="OperatingLeasesFutureMinimumPaymentsDue" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl">Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDue to us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl1" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl1">Operating Leases, Future Minimum Payments Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl1" xlink:title="label: OperatingLeasesFutureMinimumPaymentsDue to us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:title="OperatingLeasesFutureMinimumPaymentsDueCurrent" />
    <link:label xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US" id="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl">2019</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherDebtSecuritiesMember" xlink:to="us-gaap_OtherDebtSecuritiesMember_lbl2" xlink:title="label: OtherDebtSecuritiesMember to us-gaap_OtherDebtSecuritiesMember_lbl2" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest_lbl">Less: Foreign currency translation adjustments attributable to non-controlling interests</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract" xlink:label="OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract" xlink:title="OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xml:lang="en-US" id="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl">Excess tax benefits related to stock incentive programs</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xml:lang="en-US" id="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl">Other investing activities</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl1" xml:lang="en-US" id="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl1">Payments for (Proceeds from) Other Investing Activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsForProceedsFromOtherInvestingActivities" xlink:to="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl1" xlink:title="label: PaymentsForProceedsFromOtherInvestingActivities to us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="PaymentsForRepurchaseOfCommonStock" xlink:title="PaymentsForRepurchaseOfCommonStock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xml:lang="en-US" id="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl">Purchase of common stock for treasury</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl1" xml:lang="en-US" id="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl1">Payments for Repurchase of Common Stock</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsOfDividendsCommonStock" xlink:to="us-gaap_PaymentsOfDividendsCommonStock_lbl1" xlink:title="label: PaymentsOfDividendsCommonStock to us-gaap_PaymentsOfDividendsCommonStock_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:title="PaymentsToAcquireBusinessesNetOfCashAcquired" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:to="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl1" xlink:title="label: PaymentsToAcquireBusinessesNetOfCashAcquired to us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDividendsMinorityInterest" xlink:label="PaymentsOfDividendsMinorityInterest" xlink:title="PaymentsOfDividendsMinorityInterest" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividendsMinorityInterest_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsOfDividendsMinorityInterest_lbl1" xml:lang="en-US" id="us-gaap_PaymentsOfDividendsMinorityInterest_lbl1">Payments of Ordinary Dividends, Noncontrolling Interest</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsForRestructuring_lbl" xml:lang="en-US" id="us-gaap_PaymentsForRestructuring_lbl">Cash payments</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsForRestructuring_lbl1" xml:lang="en-US" id="us-gaap_PaymentsForRestructuring_lbl1">Payments for Restructuring</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="PaymentsOfDebtIssuanceCosts" xlink:title="PaymentsOfDebtIssuanceCosts" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xml:lang="en-US" id="us-gaap_PaymentsOfDebtIssuanceCosts_lbl">Debt issuance costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:title="label: PaymentsOfDebtIssuanceCosts to us-gaap_PaymentsOfDebtIssuanceCosts_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsOfDebtIssuanceCosts_lbl1" xml:lang="en-US" id="us-gaap_PaymentsOfDebtIssuanceCosts_lbl1">Payments of Debt Issuance Costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_lbl1" xlink:title="label: PaymentsOfDebtIssuanceCosts to us-gaap_PaymentsOfDebtIssuanceCosts_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="PaymentsToAcquirePropertyPlantAndEquipment" xlink:title="PaymentsToAcquirePropertyPlantAndEquipment" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl">Purchases of property, plant and equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:title="label: PaymentsToAcquirePropertyPlantAndEquipment to us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl1" xml:lang="en-US" id="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl1">Capital expenditures</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl1" xlink:title="label: PaymentsToAcquirePropertyPlantAndEquipment to us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl2" xml:lang="en-US" id="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl2">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl2" xlink:title="label: PaymentsToAcquirePropertyPlantAndEquipment to us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="PaymentsToAcquireShortTermInvestments" xlink:title="PaymentsToAcquireShortTermInvestments" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireShortTermInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_PaymentsToAcquireShortTermInvestments_lbl" xml:lang="en-US" id="us-gaap_PaymentsToAcquireShortTermInvestments_lbl">Purchases of short-term investments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsToAcquireShortTermInvestments" xlink:to="us-gaap_PaymentsToAcquireShortTermInvestments_lbl" xlink:title="label: PaymentsToAcquireShortTermInvestments to us-gaap_PaymentsToAcquireShortTermInvestments_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireShortTermInvestments_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PaymentsToAcquireShortTermInvestments_lbl1" xml:lang="en-US" id="us-gaap_PaymentsToAcquireShortTermInvestments_lbl1">Payments to Acquire Short-term Investments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaymentsToAcquireShortTermInvestments" xlink:to="us-gaap_PaymentsToAcquireShortTermInvestments_lbl1" xlink:title="label: PaymentsToAcquireShortTermInvestments to us-gaap_PaymentsToAcquireShortTermInvestments_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="us-gaap_PensionPlansDefinedBenefitMember_lbl">Pension Benefits [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PensionPlansDefinedBenefitMember" xlink:to="us-gaap_PensionPlansDefinedBenefitMember_lbl" xlink:title="label: PensionPlansDefinedBenefitMember to us-gaap_PensionPlansDefinedBenefitMember_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PensionPlansDefinedBenefitMember_lbl1" xml:lang="en-US" id="us-gaap_PensionPlansDefinedBenefitMember_lbl1">Pension Plan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PensionPlansDefinedBenefitMember" xlink:to="us-gaap_PensionPlansDefinedBenefitMember_lbl1" xlink:title="label: PensionPlansDefinedBenefitMember to us-gaap_PensionPlansDefinedBenefitMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:label="PensionAndOtherPostretirementPlansPolicy" xlink:title="PensionAndOtherPostretirementPlansPolicy" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="PlanAssetCategoriesDomain" xlink:title="PlanAssetCategoriesDomain" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US" id="us-gaap_PreferredStockSharesIssued_lbl">Preferred stock, shares issued (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl" xlink:title="label: PreferredStockSharesIssued to us-gaap_PreferredStockSharesIssued_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="PreferredStockValue" xlink:title="PreferredStockValue" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="us-gaap_PreferredStockValue_lbl">Preferred stock, without par value; 1,000,000 shares authorized; none issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl" xlink:title="label: PreferredStockValue to us-gaap_PreferredStockValue_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="PreferredStockSharesOutstanding" xlink:title="PreferredStockSharesOutstanding" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US" id="us-gaap_PreferredStockSharesOutstanding_lbl">Preferred stock, shares outstanding (in shares)</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="PreferredStockSharesAuthorized" xlink:title="PreferredStockSharesAuthorized" />
    <link:label xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US" id="us-gaap_PreferredStockSharesAuthorized_lbl">Preferred stock, shares authorized (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:title="label: PreferredStockSharesAuthorized to us-gaap_PreferredStockSharesAuthorized_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="PrepaidExpenseCurrent" xlink:title="PrepaidExpenseCurrent" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="ProceedsFromStockOptionsExercised" xlink:title="ProceedsFromStockOptionsExercised" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl1" xlink:title="label: ProfitLoss to us-gaap_ProfitLoss_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US" id="us-gaap_PropertyPlantAndEquipmentAbstract_lbl">Property, Plant and Equipment [Abstract]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US" id="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl">Property, Plant and Equipment</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl1" xml:lang="en-US" id="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl1">Property, Plant and Equipment, Policy [Policy Text Block]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US" id="us-gaap_RetainedEarningsAccumulatedDeficit_lbl">Retained earnings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:title="label: RetainedEarningsAccumulatedDeficit to us-gaap_RetainedEarningsAccumulatedDeficit_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis" xlink:label="RetirementPlanSponsorLocationAxis" xlink:title="RetirementPlanSponsorLocationAxis" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RetirementPlanSponsorLocationAxis_lbl" xml:lang="en-US" id="us-gaap_RetirementPlanSponsorLocationAxis_lbl">Retirement Plan Sponsor Location [Axis]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RetirementPlanTypeAxis_lbl" xml:lang="en-US" id="us-gaap_RetirementPlanTypeAxis_lbl">Retirement Plan Type [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetirementPlanTypeAxis" xlink:to="us-gaap_RetirementPlanTypeAxis_lbl" xlink:title="label: RetirementPlanTypeAxis to us-gaap_RetirementPlanTypeAxis_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RetirementPlanSponsorLocationDomain_lbl" xml:lang="en-US" id="us-gaap_RetirementPlanSponsorLocationDomain_lbl">Retirement Plan Sponsor Location [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetirementPlanSponsorLocationDomain" xlink:to="us-gaap_RetirementPlanSponsorLocationDomain_lbl" xlink:title="label: RetirementPlanSponsorLocationDomain to us-gaap_RetirementPlanSponsorLocationDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="RetirementPlanTypeDomain" xlink:title="RetirementPlanTypeDomain" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RetirementPlanTypeDomain_lbl" xml:lang="en-US" id="us-gaap_RetirementPlanTypeDomain_lbl">Retirement Plan Type [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetirementPlanTypeDomain" xlink:to="us-gaap_RetirementPlanTypeDomain_lbl" xlink:title="label: RetirementPlanTypeDomain to us-gaap_RetirementPlanTypeDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="RevenueFromContractWithCustomerAbstract" xlink:title="RevenueFromContractWithCustomerAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RevenueFromContractWithCustomerAbstract_lbl" xml:lang="en-US" id="us-gaap_RevenueFromContractWithCustomerAbstract_lbl">Revenue from Contracts with Customers [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="RevenueFromContractWithCustomerTextBlock" xlink:title="RevenueFromContractWithCustomerTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xml:lang="en-US" id="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl">Revenue from Contracts with Customers</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenueFromContractWithCustomerTextBlock" xlink:to="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:title="label: RevenueFromContractWithCustomerTextBlock to us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="RevenueFromContractWithCustomerExcludingAssessedTax" xlink:title="RevenueFromContractWithCustomerExcludingAssessedTax" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xml:lang="en-US" id="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl">Net Sales</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:title="label: RevenueFromContractWithCustomerExcludingAssessedTax to us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl1" xml:lang="en-US" id="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl1">Total net sales</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl1" xlink:title="label: RevenueFromContractWithCustomerExcludingAssessedTax to us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl2" xml:lang="en-US" id="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl2">Net sales</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl2" xlink:title="label: RevenueFromContractWithCustomerExcludingAssessedTax to us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="RevenueRecognitionPolicyTextBlock" xlink:title="RevenueRecognitionPolicyTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xml:lang="en-US" id="us-gaap_RevenueRecognitionPolicyTextBlock_lbl">Revenue Recognition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenueRecognitionPolicyTextBlock" xlink:to="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:title="label: RevenueRecognitionPolicyTextBlock to us-gaap_RevenueRecognitionPolicyTextBlock_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="RevenuesAbstract" xlink:title="RevenuesAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US" id="us-gaap_RevenuesAbstract_lbl">Revenue from External Customer [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl" xlink:title="label: RevenuesAbstract to us-gaap_RevenuesAbstract_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RevenuesAbstract_lbl1" xml:lang="en-US" id="us-gaap_RevenuesAbstract_lbl1">Revenues [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl1" xlink:title="label: RevenuesAbstract to us-gaap_RevenuesAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:title="RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:to="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:title="label: RevenuesFromExternalCustomersAndLongLivedAssetsLineItems to us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="RevolvingCreditFacilityMember" xlink:title="RevolvingCreditFacilityMember" />
    <link:label xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_RevolvingCreditFacilityMember_lbl" xml:lang="en-US" id="us-gaap_RevolvingCreditFacilityMember_lbl">Revolving Credit Facility [Member]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_lbl" xml:lang="en-US" id="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_lbl">Weighted Average Exercise Price Per Share [Abstract]</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_lbl1" xml:lang="en-US" id="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_lbl1">Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares" xlink:label="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares" xlink:title="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares" />
    <link:label xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl" xml:lang="en-US" id="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl">Balance, end of year (in shares)</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl1" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl1" xml:lang="en-US" id="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl1">Balance, beginning of year (in shares)</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl2" xml:lang="en-US" id="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_lbl2">Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice_lbl1" xml:lang="en-US" id="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOtherShareIncreaseDecreaseInPeriodWeightedAverageExercisePrice_lbl1">Share-based Compensation Arrangements by Share-based Payment Award, Options, Other Share Increase (Decrease) in Period, Weighted Average Exercise Price</link:label>
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:title="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" />
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    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_ShortTermInvestments_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_ShortTermInvestments_lbl1" xml:lang="en-US" id="us-gaap_ShortTermInvestments_lbl1">Short-term investments</link:label>
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    <link:label xlink:type="resource" xlink:label="us-gaap_ShortTermBorrowingsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ShortTermBorrowingsAbstract_lbl" xml:lang="en-US" id="us-gaap_ShortTermBorrowingsAbstract_lbl">Short-term Borrowings [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermBorrowingsAbstract" xlink:to="us-gaap_ShortTermBorrowingsAbstract_lbl" xlink:title="label: ShortTermBorrowingsAbstract to us-gaap_ShortTermBorrowingsAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="ShortTermBorrowings" xlink:title="ShortTermBorrowings" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_ShortTermBorrowings_lbl" xml:lang="en-US" id="us-gaap_ShortTermBorrowings_lbl">Short-term debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermBorrowings" xlink:to="us-gaap_ShortTermBorrowings_lbl" xlink:title="label: ShortTermBorrowings to us-gaap_ShortTermBorrowings_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ShortTermBorrowings_lbl1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="us-gaap_ShortTermBorrowings_lbl1" xml:lang="en-US" id="us-gaap_ShortTermBorrowings_lbl1">Short-term borrowings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermBorrowings" xlink:to="us-gaap_ShortTermBorrowings_lbl1" xlink:title="label: ShortTermBorrowings to us-gaap_ShortTermBorrowings_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_ShortTermBorrowings_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_ShortTermBorrowings_lbl2" xml:lang="en-US" id="us-gaap_ShortTermBorrowings_lbl2">Short-term Debt</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermBorrowings" xlink:to="us-gaap_ShortTermBorrowings_lbl2" xlink:title="label: ShortTermBorrowings to us-gaap_ShortTermBorrowings_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SiteContingencyTable" xlink:label="SiteContingencyTable" xlink:title="SiteContingencyTable" />
    <link:label xlink:type="resource" xlink:label="us-gaap_SiteContingencyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SiteContingencyTable_lbl" xml:lang="en-US" id="us-gaap_SiteContingencyTable_lbl">Site Contingency [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SiteContingencyTable" xlink:to="us-gaap_SiteContingencyTable_lbl" xlink:title="label: SiteContingencyTable to us-gaap_SiteContingencyTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SiteContingencyLineItems" xlink:label="SiteContingencyLineItems" xlink:title="SiteContingencyLineItems" />
    <link:label xlink:type="resource" xlink:label="us-gaap_SiteContingencyLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SiteContingencyLineItems_lbl" xml:lang="en-US" id="us-gaap_SiteContingencyLineItems_lbl">Site Contingency [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SiteContingencyLineItems" xlink:to="us-gaap_SiteContingencyLineItems_lbl" xlink:title="label: SiteContingencyLineItems to us-gaap_SiteContingencyLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SiteContingencyNameOfSite" xlink:label="SiteContingencyNameOfSite" xlink:title="SiteContingencyNameOfSite" />
    <link:label xlink:type="resource" xlink:label="us-gaap_SiteContingencyNameOfSite_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SiteContingencyNameOfSite_lbl" xml:lang="en-US" id="us-gaap_SiteContingencyNameOfSite_lbl">Location of plant</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SiteContingencyNameOfSite" xlink:to="us-gaap_SiteContingencyNameOfSite_lbl" xlink:title="label: SiteContingencyNameOfSite to us-gaap_SiteContingencyNameOfSite_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="StatementOfFinancialPositionAbstract" xlink:title="StatementOfFinancialPositionAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US" id="us-gaap_StatementOfFinancialPositionAbstract_lbl">CONSOLIDATED BALANCE SHEETS [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:title="label: StatementOfFinancialPositionAbstract to us-gaap_StatementOfFinancialPositionAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:title="StatementOfIncomeAndComprehensiveIncomeAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xml:lang="en-US" id="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl">CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:title="label: StatementOfIncomeAndComprehensiveIncomeAbstract to us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="StatementEquityComponentsAxis" xlink:title="StatementEquityComponentsAxis" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US" id="us-gaap_StatementEquityComponentsAxis_lbl">Equity Components [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl" xlink:title="label: StatementEquityComponentsAxis to us-gaap_StatementEquityComponentsAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="StatementLineItems" xlink:title="StatementLineItems" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementLineItems_lbl" xml:lang="en-US" id="us-gaap_StatementLineItems_lbl">Statement [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" xlink:title="label: StatementLineItems to us-gaap_StatementLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="StatementTable" xlink:title="StatementTable" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementTable_lbl" xml:lang="en-US" id="us-gaap_StatementTable_lbl">Statement [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementTable" xlink:to="us-gaap_StatementTable_lbl" xlink:title="label: StatementTable to us-gaap_StatementTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="StatementBusinessSegmentsAxis" xlink:title="StatementBusinessSegmentsAxis" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US" id="us-gaap_StatementBusinessSegmentsAxis_lbl">Segments [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:title="label: StatementBusinessSegmentsAxis to us-gaap_StatementBusinessSegmentsAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="StatementOfCashFlowsAbstract" xlink:title="StatementOfCashFlowsAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US" id="us-gaap_StatementOfCashFlowsAbstract_lbl">CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:title="label: StatementOfCashFlowsAbstract to us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="StatementOfStockholdersEquityAbstract" xlink:title="StatementOfStockholdersEquityAbstract" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US" id="us-gaap_StatementOfStockholdersEquityAbstract_lbl">CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:title="label: StatementOfStockholdersEquityAbstract to us-gaap_StatementOfStockholdersEquityAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:title="StockIssuedDuringPeriodSharesStockOptionsExercised" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US" id="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl">Exercised (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:title="label: StockIssuedDuringPeriodSharesStockOptionsExercised to us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:title="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl1" xml:lang="en-US" id="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl1">Exercised/vested (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl1" xlink:title="label: StockIssuedDuringPeriodSharesStockOptionsExercised to us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl2" xml:lang="en-US" id="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl2">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl2" xlink:title="label: StockIssuedDuringPeriodSharesStockOptionsExercised to us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross" xlink:label="StockIssuedDuringPeriodValueShareBasedCompensationGross" xlink:title="StockIssuedDuringPeriodValueShareBasedCompensationGross" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_lbl" xml:lang="en-US" id="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_lbl">Issuance of shares pursuant to employee stock compensation plans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockIssuedDuringPeriodValueShareBasedCompensationGross" xlink:to="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_lbl" xlink:title="label: StockIssuedDuringPeriodValueShareBasedCompensationGross to us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockOptionMember" xlink:to="us-gaap_StockOptionMember_lbl" xlink:title="label: StockOptionMember to us-gaap_StockOptionMember_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StockOptionMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StockOptionMember_lbl1" xml:lang="en-US" id="us-gaap_StockOptionMember_lbl1">Equity Option [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockOptionMember" xlink:to="us-gaap_StockOptionMember_lbl1" xlink:title="label: StockOptionMember to us-gaap_StockOptionMember_lbl1" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US" id="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl">Stockholders' Equity</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" xlink:title="label: StockholdersEquity to us-gaap_StockholdersEquity_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_StockholdersEquity_lbl1" xml:lang="en-US" id="us-gaap_StockholdersEquity_lbl1">Stockholders' Equity Attributable to Parent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl1" xlink:title="label: StockholdersEquity to us-gaap_StockholdersEquity_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:title="StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl" xlink:title="label: SubsequentEventMember to us-gaap_SubsequentEventMember_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="us-gaap_SubsequentEventTypeDomain_lbl">Subsequent Event Type [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl" xlink:title="label: SubsequentEventTypeDomain to us-gaap_SubsequentEventTypeDomain_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SubsequentEventLineItems_lbl" xml:lang="en-US" id="us-gaap_SubsequentEventLineItems_lbl">Subsequent Event [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventLineItems_lbl" xlink:title="label: SubsequentEventLineItems to us-gaap_SubsequentEventLineItems_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="us-gaap_SubsequentEventTypeAxis_lbl">Subsequent Event Type [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" xlink:title="label: SubsequentEventTypeAxis to us-gaap_SubsequentEventTypeAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventsPolicyPolicyTextBlock" xlink:label="SubsequentEventsPolicyPolicyTextBlock" xlink:title="SubsequentEventsPolicyPolicyTextBlock" />
    <link:label xlink:type="resource" xlink:label="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xml:lang="en-US" id="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl">Subsequent Events</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SubsequentEventsPolicyPolicyTextBlock" xlink:to="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xlink:title="label: SubsequentEventsPolicyPolicyTextBlock to us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" />
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    <link:label xlink:type="resource" xlink:label="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_lbl" xml:lang="en-US" id="us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_lbl">Activity Related to Unrecognized Tax Benefits</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:title="label: SupplementalCashFlowInformationAbstract to us-gaap_SupplementalCashFlowInformationAbstract_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ValuationAllowancesAndReservesDomain" xlink:to="us-gaap_ValuationAllowancesAndReservesDomain_lbl" xlink:title="label: ValuationAllowancesAndReservesDomain to us-gaap_ValuationAllowancesAndReservesDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="VariableRateDomain" xlink:title="VariableRateDomain" />
    <link:label xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_VariableRateDomain_lbl" xml:lang="en-US" id="us-gaap_VariableRateDomain_lbl">Variable Rate [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl" xlink:title="label: VariableRateDomain to us-gaap_VariableRateDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="VariableRateAxis" xlink:title="VariableRateAxis" />
    <link:label xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_VariableRateAxis_lbl" xml:lang="en-US" id="us-gaap_VariableRateAxis_lbl">Variable Rate [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl" xlink:title="label: VariableRateAxis to us-gaap_VariableRateAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:title="WeightedAverageNumberDilutedSharesOutstandingAdjustment" />
    <link:label xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xml:lang="en-US" id="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl">Dilutive effect of stock options and stock units (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xlink:title="label: WeightedAverageNumberDilutedSharesOutstandingAdjustment to us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="WeightedAverageNumberOfSharesOutstandingBasic" xlink:title="WeightedAverageNumberOfSharesOutstandingBasic" />
    <link:label xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US" id="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl">Weighted average shares outstanding (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:title="label: WeightedAverageNumberOfSharesOutstandingBasic to us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl1" xml:lang="en-US" id="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl1">Basic (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl1" xlink:title="label: WeightedAverageNumberOfSharesOutstandingBasic to us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="WeightedAverageNumberOfDilutedSharesOutstanding" xlink:title="WeightedAverageNumberOfDilutedSharesOutstanding" />
    <link:label xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:title="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US" id="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl">Weighted average shares outstanding, adjusted (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:title="label: WeightedAverageNumberOfDilutedSharesOutstanding to us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" />
    <link:label xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl1" xml:lang="en-US" id="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl1">Diluted (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl1" xlink:title="label: WeightedAverageNumberOfDilutedSharesOutstanding to us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl1" />
    <link:label xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl2" xml:lang="en-US" id="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl2">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl2" xlink:title="label: WeightedAverageNumberOfDilutedSharesOutstanding to us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl2" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AsiaMember" xlink:label="AsiaMember" xlink:title="AsiaMember" />
    <link:label xlink:type="resource" xlink:label="srt_AsiaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="srt_AsiaMember_lbl" xml:lang="en-US" id="srt_AsiaMember_lbl">Asia [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AsiaMember" xlink:to="srt_AsiaMember_lbl" xlink:title="label: AsiaMember to srt_AsiaMember_lbl" />
    <link:label xlink:type="resource" xlink:label="srt_AsiaMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_AsiaMember_lbl1" xml:lang="en-US" id="srt_AsiaMember_lbl1">Asia [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AsiaMember" xlink:to="srt_AsiaMember_lbl1" xlink:title="label: AsiaMember to srt_AsiaMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="ConsolidationItemsDomain" xlink:title="ConsolidationItemsDomain" />
    <link:label xlink:type="resource" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ConsolidationItemsDomain_lbl" xml:lang="en-US" id="srt_ConsolidationItemsDomain_lbl">Consolidation Items [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ConsolidationItemsDomain" xlink:to="srt_ConsolidationItemsDomain_lbl" xlink:title="label: ConsolidationItemsDomain to srt_ConsolidationItemsDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="ConsolidationItemsAxis" xlink:title="ConsolidationItemsAxis" />
    <link:label xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ConsolidationItemsAxis_lbl" xml:lang="en-US" id="srt_ConsolidationItemsAxis_lbl">Consolidation Items [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ConsolidationItemsAxis" xlink:to="srt_ConsolidationItemsAxis_lbl" xlink:title="label: ConsolidationItemsAxis to srt_ConsolidationItemsAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="MaximumMember" xlink:title="MaximumMember" />
    <link:label xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_MaximumMember_lbl" xml:lang="en-US" id="srt_MaximumMember_lbl">Maximum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MaximumMember" xlink:to="srt_MaximumMember_lbl" xlink:title="label: MaximumMember to srt_MaximumMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:label="MinimumMember" xlink:title="MinimumMember" />
    <link:label xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_MinimumMember_lbl" xml:lang="en-US" id="srt_MinimumMember_lbl">Minimum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MinimumMember" xlink:to="srt_MinimumMember_lbl" xlink:title="label: MinimumMember to srt_MinimumMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="ProductsAndServicesDomain" xlink:title="ProductsAndServicesDomain" />
    <link:label xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ProductsAndServicesDomain_lbl" xml:lang="en-US" id="srt_ProductsAndServicesDomain_lbl">Products and Service [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" xlink:title="label: ProductsAndServicesDomain to srt_ProductsAndServicesDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="ProductOrServiceAxis" xlink:title="ProductOrServiceAxis" />
    <link:label xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="srt_ProductOrServiceAxis_lbl" xml:lang="en-US" id="srt_ProductOrServiceAxis_lbl">Product and Service [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" xlink:title="label: ProductOrServiceAxis to srt_ProductOrServiceAxis_lbl" />
    <link:label xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ProductOrServiceAxis_lbl1" xml:lang="en-US" id="srt_ProductOrServiceAxis_lbl1">Products and Service [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl1" xlink:title="label: ProductOrServiceAxis to srt_ProductOrServiceAxis_lbl1" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableGeographicalComponentsMember" xlink:label="ReportableGeographicalComponentsMember" xlink:title="ReportableGeographicalComponentsMember" />
    <link:label xlink:type="resource" xlink:label="srt_ReportableGeographicalComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ReportableGeographicalComponentsMember_lbl" xml:lang="en-US" id="srt_ReportableGeographicalComponentsMember_lbl">Reportable Geographical Components [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReportableGeographicalComponentsMember" xlink:to="srt_ReportableGeographicalComponentsMember_lbl" xlink:title="label: ReportableGeographicalComponentsMember to srt_ReportableGeographicalComponentsMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:label="RangeMember" xlink:title="RangeMember" />
    <link:label xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_RangeMember_lbl" xml:lang="en-US" id="srt_RangeMember_lbl">Statistical Measurement [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RangeMember" xlink:to="srt_RangeMember_lbl" xlink:title="label: RangeMember to srt_RangeMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:label="RangeAxis" xlink:title="RangeAxis" />
    <link:label xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_RangeAxis_lbl" xml:lang="en-US" id="srt_RangeAxis_lbl">Statistical Measurement [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RangeAxis" xlink:to="srt_RangeAxis_lbl" xlink:title="label: RangeAxis to srt_RangeAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RestatementDomain" xlink:label="RestatementDomain" xlink:title="RestatementDomain" />
    <link:label xlink:type="resource" xlink:label="srt_RestatementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_RestatementDomain_lbl" xml:lang="en-US" id="srt_RestatementDomain_lbl">Restatement [Domain]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RestatementDomain" xlink:to="srt_RestatementDomain_lbl" xlink:title="label: RestatementDomain to srt_RestatementDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RestatementAdjustmentMember" xlink:label="RestatementAdjustmentMember" xlink:title="RestatementAdjustmentMember" />
    <link:label xlink:type="resource" xlink:label="srt_RestatementAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_RestatementAdjustmentMember_lbl" xml:lang="en-US" id="srt_RestatementAdjustmentMember_lbl">Increase/(Decrease) [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RestatementAdjustmentMember" xlink:to="srt_RestatementAdjustmentMember_lbl" xlink:title="label: RestatementAdjustmentMember to srt_RestatementAdjustmentMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RestatementAxis" xlink:label="RestatementAxis" xlink:title="RestatementAxis" />
    <link:label xlink:type="resource" xlink:label="srt_RestatementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_RestatementAxis_lbl" xml:lang="en-US" id="srt_RestatementAxis_lbl">Restatement [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RestatementAxis" xlink:to="srt_RestatementAxis_lbl" xlink:title="label: RestatementAxis to srt_RestatementAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="ScenarioPreviouslyReportedMember" xlink:title="ScenarioPreviouslyReportedMember" />
    <link:label xlink:type="resource" xlink:label="srt_ScenarioPreviouslyReportedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ScenarioPreviouslyReportedMember_lbl" xml:lang="en-US" id="srt_ScenarioPreviouslyReportedMember_lbl">Previously Reported [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ScenarioPreviouslyReportedMember" xlink:to="srt_ScenarioPreviouslyReportedMember_lbl" xlink:title="label: ScenarioPreviouslyReportedMember to srt_ScenarioPreviouslyReportedMember_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" xlink:label="ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" xlink:title="ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl" xlink:title="label: SegmentGeographicalDomain to srt_SegmentGeographicalDomain_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="StatementGeographicalAxis" xlink:title="StatementGeographicalAxis" />
    <link:label xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_StatementGeographicalAxis_lbl" xml:lang="en-US" id="srt_StatementGeographicalAxis_lbl">Geographical [Axis]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl" xlink:title="label: StatementGeographicalAxis to srt_StatementGeographicalAxis_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ValuationAndQualifyingAccountsAbstract" xlink:label="ValuationAndQualifyingAccountsAbstract" xlink:title="ValuationAndQualifyingAccountsAbstract" />
    <link:label xlink:type="resource" xlink:label="srt_ValuationAndQualifyingAccountsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ValuationAndQualifyingAccountsAbstract_lbl" xml:lang="en-US" id="srt_ValuationAndQualifyingAccountsAbstract_lbl">SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ValuationAndQualifyingAccountsAbstract" xlink:to="srt_ValuationAndQualifyingAccountsAbstract_lbl" xlink:title="label: ValuationAndQualifyingAccountsAbstract to srt_ValuationAndQualifyingAccountsAbstract_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="ValuationAndQualifyingAccountsDisclosureLineItems" xlink:title="ValuationAndQualifyingAccountsDisclosureLineItems" />
    <link:label xlink:type="resource" xlink:label="srt_ValuationAndQualifyingAccountsDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="srt_ValuationAndQualifyingAccountsDisclosureLineItems_lbl" xml:lang="en-US" id="srt_ValuationAndQualifyingAccountsDisclosureLineItems_lbl">Valuation and Qualifying Accounts Disclosure [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ValuationAndQualifyingAccountsDisclosureLineItems" xlink:to="srt_ValuationAndQualifyingAccountsDisclosureLineItems_lbl" xlink:title="label: ValuationAndQualifyingAccountsDisclosureLineItems to srt_ValuationAndQualifyingAccountsDisclosureLineItems_lbl" />
    <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="ValuationAndQualifyingAccountsDisclosureTable" xlink:title="ValuationAndQualifyingAccountsDisclosureTable" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ValuationAndQualifyingAccountsDisclosureTable" xlink:to="srt_ValuationAndQualifyingAccountsDisclosureTable_lbl" xlink:title="label: ValuationAndQualifyingAccountsDisclosureTable to srt_ValuationAndQualifyingAccountsDisclosureTable_lbl" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="US" xlink:title="US" />
    <link:label xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="country_US_lbl" xml:lang="en-US" id="country_US_lbl">United States [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="US" xlink:to="country_US_lbl" xlink:title="label: US to country_US_lbl" />
    <link:label xlink:type="resource" xlink:label="country_US_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="country_US_lbl1" xml:lang="en-US" id="country_US_lbl1">U.S. Plans [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="US" xlink:to="country_US_lbl1" xlink:title="label: US to country_US_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_SpecialtyMineralsMember" xlink:label="SpecialtyMineralsMember" xlink:title="SpecialtyMineralsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_SpecialtyMineralsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_SpecialtyMineralsMember_lbl" xml:lang="en-US" id="mtx_SpecialtyMineralsMember_lbl">A component of an enterprise representing facts about an entire consolidated business entity disaggregated by business or economic activities related to specialty minerals segment. Specialty Minerals segment produces and sells the synthetic mineral product precipitated calcium carbonate ("PCC") and processed mineral product quicklime ("lime"), and mines mineral ores then processes and sells natural mineral products, primarily limestone and talc.</link:label>
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    <link:label xlink:type="resource" xlink:label="mtx_SpecialtyMineralsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_SpecialtyMineralsMember_lbl1" xml:lang="en-US" id="mtx_SpecialtyMineralsMember_lbl1">Specialty Minerals [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SpecialtyMineralsMember" xlink:to="mtx_SpecialtyMineralsMember_lbl1" xlink:title="label: SpecialtyMineralsMember to mtx_SpecialtyMineralsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EnergyServicesMember" xlink:label="EnergyServicesMember" xlink:title="EnergyServicesMember" />
    <link:label xlink:type="resource" xlink:label="mtx_EnergyServicesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EnergyServicesMember_lbl" xml:lang="en-US" id="mtx_EnergyServicesMember_lbl">A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements related to energy services segment. The Energy Services segment provides services to improve the production, costs, compliance, and environmental impact of activities performed in oil and gas industry. This segment offers a range of patented and unpatented technologies, products and services for all phases of oil and gas production, refining, and storage throughout the world.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnergyServicesMember" xlink:to="mtx_EnergyServicesMember_lbl" xlink:title="label: EnergyServicesMember to mtx_EnergyServicesMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EnergyServicesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EnergyServicesMember_lbl1" xml:lang="en-US" id="mtx_EnergyServicesMember_lbl1">Energy Services [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnergyServicesMember" xlink:to="mtx_EnergyServicesMember_lbl1" xlink:title="label: EnergyServicesMember to mtx_EnergyServicesMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_PerformanceMaterialsMember" xlink:label="PerformanceMaterialsMember" xlink:title="PerformanceMaterialsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_PerformanceMaterialsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_PerformanceMaterialsMember_lbl" xml:lang="en-US" id="mtx_PerformanceMaterialsMember_lbl">A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements related to performance materials segment. The Performance Materials segment is a leading supplier of bentonite and bentonite-related products. This segment also supplies chromite and leonardite and operates more than 25 mining or production facilities worldwide.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PerformanceMaterialsMember" xlink:to="mtx_PerformanceMaterialsMember_lbl" xlink:title="label: PerformanceMaterialsMember to mtx_PerformanceMaterialsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_PerformanceMaterialsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_PerformanceMaterialsMember_lbl1" xml:lang="en-US" id="mtx_PerformanceMaterialsMember_lbl1">Performance Materials [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PerformanceMaterialsMember" xlink:to="mtx_PerformanceMaterialsMember_lbl1" xlink:title="label: PerformanceMaterialsMember to mtx_PerformanceMaterialsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RefractoriesMember" xlink:label="RefractoriesMember" xlink:title="RefractoriesMember" />
    <link:label xlink:type="resource" xlink:label="mtx_RefractoriesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_RefractoriesMember_lbl" xml:lang="en-US" id="mtx_RefractoriesMember_lbl">A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements related to refractories segment. Refractories segment produces and markets monolithic and shaped refractory materials and specialty products, services and application and measurement equipment, and calcium metal and metallurgical wire products.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RefractoriesMember" xlink:to="mtx_RefractoriesMember_lbl" xlink:title="label: RefractoriesMember to mtx_RefractoriesMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_RefractoriesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RefractoriesMember_lbl1" xml:lang="en-US" id="mtx_RefractoriesMember_lbl1">Refractories [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RefractoriesMember" xlink:to="mtx_RefractoriesMember_lbl1" xlink:title="label: RefractoriesMember to mtx_RefractoriesMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock" xlink:label="StrippingCostsIncurredDuringProductionPolicyTextBlock" xlink:title="StrippingCostsIncurredDuringProductionPolicyTextBlock" />
    <link:label xlink:type="resource" xlink:label="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl" xml:lang="en-US" id="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl">Disclosure of accounting policy for costs incurred for the removal of waste material for the purposes of accessing raw materials for productions and how those costs are accounted for.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StrippingCostsIncurredDuringProductionPolicyTextBlock" xlink:to="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl" xlink:title="label: StrippingCostsIncurredDuringProductionPolicyTextBlock to mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl1" xml:lang="en-US" id="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl1">Stripping Costs Incurred During Production [Policy Text Block]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StrippingCostsIncurredDuringProductionPolicyTextBlock" xlink:to="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl1" xlink:title="label: StrippingCostsIncurredDuringProductionPolicyTextBlock to mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl2" xml:lang="en-US" id="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl2">Stripping Costs Incurred During Production</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StrippingCostsIncurredDuringProductionPolicyTextBlock" xlink:to="mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl2" xlink:title="label: StrippingCostsIncurredDuringProductionPolicyTextBlock to mtx_StrippingCostsIncurredDuringProductionPolicyTextBlock_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract" xlink:label="FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract" xlink:title="FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract_lbl1" xml:lang="en-US" id="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract_lbl1">Financial Instruments and Concentrations of Credit Risk [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract" xlink:to="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract_lbl1" xlink:title="label: FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract to mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock" xlink:label="FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock" xlink:title="FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock" />
    <link:label xlink:type="resource" xlink:label="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl" xml:lang="en-US" id="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl">The entire disclosure of methods and assumptions used to estimate the fair value of financial instruments, and the entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock" xlink:to="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl" xlink:title="label: FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock to mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl1" xml:lang="en-US" id="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl1">Financial Instruments and Concentrations of Credit Risk [Text Block]</link:label>
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    <link:label xlink:type="resource" xlink:label="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl2" xml:lang="en-US" id="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl2">Financial Instruments and Concentrations of Credit Risk</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock" xlink:to="mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl2" xlink:title="label: FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock to mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AggregateIntrinsicValueAbstract" xlink:label="AggregateIntrinsicValueAbstract" xlink:title="AggregateIntrinsicValueAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_AggregateIntrinsicValueAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AggregateIntrinsicValueAbstract_lbl1" xml:lang="en-US" id="mtx_AggregateIntrinsicValueAbstract_lbl1">Aggregate Intrinsic Value [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AggregateIntrinsicValueAbstract" xlink:to="mtx_AggregateIntrinsicValueAbstract_lbl1" xlink:title="label: AggregateIntrinsicValueAbstract to mtx_AggregateIntrinsicValueAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl">The combined weighted average of the accumulated differences between the fair values on underlying shares and exercise prices to acquire such shares as of the grant date on options that were exercised during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl1" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl1">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised in Period, Weighted Average Intrinsic Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl1" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl2" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl2">Weighted average intrinsic value of options exercised (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl2" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageIntrinsicValue_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NonvestedStockOptionsMember" xlink:label="NonvestedStockOptionsMember" xlink:title="NonvestedStockOptionsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_NonvestedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NonvestedStockOptionsMember_lbl" xml:lang="en-US" id="mtx_NonvestedStockOptionsMember_lbl">Incremental common shares attributable to nonvested stock options that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented. A contract that gives the holder the right, but not the obligation, either to purchase or to sell a certain number of shares of stock at a predetermined price for a specified period of time.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonvestedStockOptionsMember" xlink:to="mtx_NonvestedStockOptionsMember_lbl" xlink:title="label: NonvestedStockOptionsMember to mtx_NonvestedStockOptionsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NonvestedStockOptionsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NonvestedStockOptionsMember_lbl1" xml:lang="en-US" id="mtx_NonvestedStockOptionsMember_lbl1">Nonvested Stock Options [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonvestedStockOptionsMember" xlink:to="mtx_NonvestedStockOptionsMember_lbl1" xlink:title="label: NonvestedStockOptionsMember to mtx_NonvestedStockOptionsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl">This element represents the forfeiture rate based on company history for the fair value valuation method used by the company in identifying the fair value of stock options</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl1" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl1">Share-based Compensation Arrangement by Share-based Payment Award, Option, Forfeiture Rate Assumed</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl1" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl2" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl2">Forfeiture rate assumed</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl2" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionForfeitureRateAssumed_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ReversalsOfCompensationExpense" xlink:label="ReversalsOfCompensationExpense" xlink:title="ReversalsOfCompensationExpense" />
    <link:label xlink:type="resource" xlink:label="mtx_ReversalsOfCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ReversalsOfCompensationExpense_lbl" xml:lang="en-US" id="mtx_ReversalsOfCompensationExpense_lbl">Current year reversals of stock compensation expense recognized in a prior year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReversalsOfCompensationExpense" xlink:to="mtx_ReversalsOfCompensationExpense_lbl" xlink:title="label: ReversalsOfCompensationExpense to mtx_ReversalsOfCompensationExpense_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ReversalsOfCompensationExpense_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ReversalsOfCompensationExpense_lbl1" xml:lang="en-US" id="mtx_ReversalsOfCompensationExpense_lbl1">Reversals of compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReversalsOfCompensationExpense" xlink:to="mtx_ReversalsOfCompensationExpense_lbl1" xlink:title="label: ReversalsOfCompensationExpense to mtx_ReversalsOfCompensationExpense_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ReversalsOfCompensationExpense_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_ReversalsOfCompensationExpense_lbl2" xml:lang="en-US" id="mtx_ReversalsOfCompensationExpense_lbl2">Reversals of compensation expense related to restricted stock forfeitures</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReversalsOfCompensationExpense" xlink:to="mtx_ReversalsOfCompensationExpense_lbl2" xlink:title="label: ReversalsOfCompensationExpense to mtx_ReversalsOfCompensationExpense_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_StatementOfIncomeAbstract" xlink:label="StatementOfIncomeAbstract" xlink:title="StatementOfIncomeAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_StatementOfIncomeAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_StatementOfIncomeAbstract_lbl1" xml:lang="en-US" id="mtx_StatementOfIncomeAbstract_lbl1">Statement of Income [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementOfIncomeAbstract" xlink:to="mtx_StatementOfIncomeAbstract_lbl1" xlink:title="label: StatementOfIncomeAbstract to mtx_StatementOfIncomeAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_StatementOfIncomeAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_StatementOfIncomeAbstract_lbl2" xml:lang="en-US" id="mtx_StatementOfIncomeAbstract_lbl2">Statements of Income [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="StatementOfIncomeAbstract" xlink:to="mtx_StatementOfIncomeAbstract_lbl2" xlink:title="label: StatementOfIncomeAbstract to mtx_StatementOfIncomeAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NonCashPensionSettlementCosts" xlink:label="NonCashPensionSettlementCosts" xlink:title="NonCashPensionSettlementCosts" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashPensionSettlementCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NonCashPensionSettlementCosts_lbl" xml:lang="en-US" id="mtx_NonCashPensionSettlementCosts_lbl">Non-cash pension settlement costs during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashPensionSettlementCosts" xlink:to="mtx_NonCashPensionSettlementCosts_lbl" xlink:title="label: NonCashPensionSettlementCosts to mtx_NonCashPensionSettlementCosts_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashPensionSettlementCosts_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NonCashPensionSettlementCosts_lbl1" xml:lang="en-US" id="mtx_NonCashPensionSettlementCosts_lbl1">Non Cash Pension Settlement Costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashPensionSettlementCosts" xlink:to="mtx_NonCashPensionSettlementCosts_lbl1" xlink:title="label: NonCashPensionSettlementCosts to mtx_NonCashPensionSettlementCosts_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashPensionSettlementCosts_lbl2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="mtx_NonCashPensionSettlementCosts_lbl2" xml:lang="en-US" id="mtx_NonCashPensionSettlementCosts_lbl2">Non-cash pension settlement charge</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashPensionSettlementCosts" xlink:to="mtx_NonCashPensionSettlementCosts_lbl2" xlink:title="label: NonCashPensionSettlementCosts to mtx_NonCashPensionSettlementCosts_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DebtModificationCostsAndFees" xlink:label="DebtModificationCostsAndFees" xlink:title="DebtModificationCostsAndFees" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtModificationCostsAndFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DebtModificationCostsAndFees_lbl" xml:lang="en-US" id="mtx_DebtModificationCostsAndFees_lbl">The debt modification costs and fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtModificationCostsAndFees" xlink:to="mtx_DebtModificationCostsAndFees_lbl" xlink:title="label: DebtModificationCostsAndFees to mtx_DebtModificationCostsAndFees_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtModificationCostsAndFees_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DebtModificationCostsAndFees_lbl1" xml:lang="en-US" id="mtx_DebtModificationCostsAndFees_lbl1">Debt modification costs and fees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtModificationCostsAndFees" xlink:to="mtx_DebtModificationCostsAndFees_lbl1" xlink:title="label: DebtModificationCostsAndFees to mtx_DebtModificationCostsAndFees_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtModificationCostsAndFees_lbl2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="mtx_DebtModificationCostsAndFees_lbl2" xml:lang="en-US" id="mtx_DebtModificationCostsAndFees_lbl2">Debt modification costs and fees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtModificationCostsAndFees" xlink:to="mtx_DebtModificationCostsAndFees_lbl2" xlink:title="label: DebtModificationCostsAndFees to mtx_DebtModificationCostsAndFees_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RecentlyAdoptedAccountingStandardsAbstract" xlink:label="RecentlyAdoptedAccountingStandardsAbstract" xlink:title="RecentlyAdoptedAccountingStandardsAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl1" xml:lang="en-US" id="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl1">Recently Adopted Accounting Standards [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RecentlyAdoptedAccountingStandardsAbstract" xlink:to="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl1" xlink:title="label: RecentlyAdoptedAccountingStandardsAbstract to mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl2" xml:lang="en-US" id="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl2">Recently Adopted Accounting Standards [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RecentlyAdoptedAccountingStandardsAbstract" xlink:to="mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl2" xlink:title="label: RecentlyAdoptedAccountingStandardsAbstract to mtx_RecentlyAdoptedAccountingStandardsAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember" xlink:label="ComputerEquipmentAndSoftwareRelatedAssetsMember" xlink:title="ComputerEquipmentAndSoftwareRelatedAssetsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl" xml:lang="en-US" id="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl">Long lived, depreciable assets that are used in the creation, maintenance and utilization of information systems and software-related assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ComputerEquipmentAndSoftwareRelatedAssetsMember" xlink:to="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl" xlink:title="label: ComputerEquipmentAndSoftwareRelatedAssetsMember to mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl1" xml:lang="en-US" id="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl1">Computer equipment and software-related assets [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ComputerEquipmentAndSoftwareRelatedAssetsMember" xlink:to="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl1" xlink:title="label: ComputerEquipmentAndSoftwareRelatedAssetsMember to mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl2" xml:lang="en-US" id="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl2">Computer Equipment and Software-related Assets [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ComputerEquipmentAndSoftwareRelatedAssetsMember" xlink:to="mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl2" xlink:title="label: ComputerEquipmentAndSoftwareRelatedAssetsMember to mtx_ComputerEquipmentAndSoftwareRelatedAssetsMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_InitialTermOfLongTermEvergreenContracts" xlink:label="InitialTermOfLongTermEvergreenContracts" xlink:title="InitialTermOfLongTermEvergreenContracts" />
    <link:label xlink:type="resource" xlink:label="mtx_InitialTermOfLongTermEvergreenContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_InitialTermOfLongTermEvergreenContracts_lbl" xml:lang="en-US" id="mtx_InitialTermOfLongTermEvergreenContracts_lbl">The initial length of time that the company's long-term evergreen contracts in effect. Sales of PCC (precipitated calcium carbonate) are predominantly pursuant to long-term evergreen contracts, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InitialTermOfLongTermEvergreenContracts" xlink:to="mtx_InitialTermOfLongTermEvergreenContracts_lbl" xlink:title="label: InitialTermOfLongTermEvergreenContracts to mtx_InitialTermOfLongTermEvergreenContracts_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_InitialTermOfLongTermEvergreenContracts_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_InitialTermOfLongTermEvergreenContracts_lbl1" xml:lang="en-US" id="mtx_InitialTermOfLongTermEvergreenContracts_lbl1">Initial term of long term evergreen contracts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InitialTermOfLongTermEvergreenContracts" xlink:to="mtx_InitialTermOfLongTermEvergreenContracts_lbl1" xlink:title="label: InitialTermOfLongTermEvergreenContracts to mtx_InitialTermOfLongTermEvergreenContracts_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_InitialTermOfLongTermEvergreenContracts_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_InitialTermOfLongTermEvergreenContracts_lbl2" xml:lang="en-US" id="mtx_InitialTermOfLongTermEvergreenContracts_lbl2">Initial term of long term evergreen contracts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InitialTermOfLongTermEvergreenContracts" xlink:to="mtx_InitialTermOfLongTermEvergreenContracts_lbl2" xlink:title="label: InitialTermOfLongTermEvergreenContracts to mtx_InitialTermOfLongTermEvergreenContracts_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AnnualDepreciationRate" xlink:label="AnnualDepreciationRate" xlink:title="AnnualDepreciationRate" />
    <link:label xlink:type="resource" xlink:label="mtx_AnnualDepreciationRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AnnualDepreciationRate_lbl" xml:lang="en-US" id="mtx_AnnualDepreciationRate_lbl">Refers to percentage of annual depreciation rate charge for property, plant and equipment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AnnualDepreciationRate" xlink:to="mtx_AnnualDepreciationRate_lbl" xlink:title="label: AnnualDepreciationRate to mtx_AnnualDepreciationRate_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AnnualDepreciationRate_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AnnualDepreciationRate_lbl1" xml:lang="en-US" id="mtx_AnnualDepreciationRate_lbl1">Annual Depreciation Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AnnualDepreciationRate" xlink:to="mtx_AnnualDepreciationRate_lbl1" xlink:title="label: AnnualDepreciationRate to mtx_AnnualDepreciationRate_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AnnualDepreciationRate_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_AnnualDepreciationRate_lbl2" xml:lang="en-US" id="mtx_AnnualDepreciationRate_lbl2">Annual rates of depreciation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AnnualDepreciationRate" xlink:to="mtx_AnnualDepreciationRate_lbl2" xlink:title="label: AnnualDepreciationRate to mtx_AnnualDepreciationRate_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember" xlink:label="MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember" xlink:title="MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl" xml:lang="en-US" id="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl">Tangible personal property, nonconsumable in nature, with finite lives used to produce goods and services.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember" xlink:to="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl" xlink:title="label: MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember to mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl1" xml:lang="en-US" id="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl1">Machinery and Equipment for Natural Stone Mining and Processing Plants and Chemical Plants [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember" xlink:to="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl1" xlink:title="label: MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember to mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl2" xml:lang="en-US" id="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl2">Machinery and Equipment for Natural Stone Mining and Processing Plants and Chemical Plants [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember" xlink:to="mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl2" xlink:title="label: MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember to mtx_MachineryAndEquipmentForNaturalStoneMiningAndProcessingPlantsAndChemicalPlantsMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_PastDueThresholdForIndividualCollectabilityReview" xlink:label="PastDueThresholdForIndividualCollectabilityReview" xlink:title="PastDueThresholdForIndividualCollectabilityReview" />
    <link:label xlink:type="resource" xlink:label="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl" xml:lang="en-US" id="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl">The length of time for which a receivable is past due that will trigger an individual review for collectability, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PastDueThresholdForIndividualCollectabilityReview" xlink:to="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl" xlink:title="label: PastDueThresholdForIndividualCollectabilityReview to mtx_PastDueThresholdForIndividualCollectabilityReview_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl1" xml:lang="en-US" id="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl1">Past due threshold for individual collectability review</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PastDueThresholdForIndividualCollectabilityReview" xlink:to="mtx_PastDueThresholdForIndividualCollectabilityReview_lbl1" xlink:title="label: PastDueThresholdForIndividualCollectabilityReview to mtx_PastDueThresholdForIndividualCollectabilityReview_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract" xlink:label="AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract" xlink:title="AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract_lbl1" xml:lang="en-US" id="mtx_AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract_lbl1">Antidilutive Securities Excluded from Earnings Per Share Calculation [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract" xlink:to="mtx_AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract_lbl1" xlink:title="label: AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract to mtx_AntidilutiveSecuritiesExcludedFromEarningsPerShareCalculationAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EnvironmentalProductsMember" xlink:label="EnvironmentalProductsMember" xlink:title="EnvironmentalProductsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_EnvironmentalProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EnvironmentalProductsMember_lbl" xml:lang="en-US" id="mtx_EnvironmentalProductsMember_lbl">Revenue from external customers from sale of Environmental Products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalProductsMember" xlink:to="mtx_EnvironmentalProductsMember_lbl" xlink:title="label: EnvironmentalProductsMember to mtx_EnvironmentalProductsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EnvironmentalProductsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EnvironmentalProductsMember_lbl1" xml:lang="en-US" id="mtx_EnvironmentalProductsMember_lbl1">Environmental Products [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EnvironmentalProductsMember" xlink:to="mtx_EnvironmentalProductsMember_lbl1" xlink:title="label: EnvironmentalProductsMember to mtx_EnvironmentalProductsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MetalcastingMember" xlink:label="MetalcastingMember" xlink:title="MetalcastingMember" />
    <link:label xlink:type="resource" xlink:label="mtx_MetalcastingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MetalcastingMember_lbl" xml:lang="en-US" id="mtx_MetalcastingMember_lbl">Revenue from external customers from sale of Metalcasting products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MetalcastingMember" xlink:to="mtx_MetalcastingMember_lbl" xlink:title="label: MetalcastingMember to mtx_MetalcastingMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MetalcastingMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MetalcastingMember_lbl1" xml:lang="en-US" id="mtx_MetalcastingMember_lbl1">Metalcasting [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MetalcastingMember" xlink:to="mtx_MetalcastingMember_lbl1" xlink:title="label: MetalcastingMember to mtx_MetalcastingMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_GroundCalciumCarbonateMember" xlink:label="GroundCalciumCarbonateMember" xlink:title="GroundCalciumCarbonateMember" />
    <link:label xlink:type="resource" xlink:label="mtx_GroundCalciumCarbonateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_GroundCalciumCarbonateMember_lbl" xml:lang="en-US" id="mtx_GroundCalciumCarbonateMember_lbl">Revenue from external customers from sale of Ground Calcium Carbonate products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GroundCalciumCarbonateMember" xlink:to="mtx_GroundCalciumCarbonateMember_lbl" xlink:title="label: GroundCalciumCarbonateMember to mtx_GroundCalciumCarbonateMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_GroundCalciumCarbonateMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_GroundCalciumCarbonateMember_lbl1" xml:lang="en-US" id="mtx_GroundCalciumCarbonateMember_lbl1">Ground Calcium Carbonate [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GroundCalciumCarbonateMember" xlink:to="mtx_GroundCalciumCarbonateMember_lbl1" xlink:title="label: GroundCalciumCarbonateMember to mtx_GroundCalciumCarbonateMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_GroundCalciumCarbonateMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_GroundCalciumCarbonateMember_lbl2" xml:lang="en-US" id="mtx_GroundCalciumCarbonateMember_lbl2">Ground Calcium Carbonate [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GroundCalciumCarbonateMember" xlink:to="mtx_GroundCalciumCarbonateMember_lbl2" xlink:title="label: GroundCalciumCarbonateMember to mtx_GroundCalciumCarbonateMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TalcMember" xlink:label="TalcMember" xlink:title="TalcMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TalcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TalcMember_lbl" xml:lang="en-US" id="mtx_TalcMember_lbl">Revenue from external customers from sale of Talc products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TalcMember" xlink:to="mtx_TalcMember_lbl" xlink:title="label: TalcMember to mtx_TalcMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TalcMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TalcMember_lbl1" xml:lang="en-US" id="mtx_TalcMember_lbl1">Talc [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TalcMember" xlink:to="mtx_TalcMember_lbl1" xlink:title="label: TalcMember to mtx_TalcMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RefractoryProductsMember" xlink:label="RefractoryProductsMember" xlink:title="RefractoryProductsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_RefractoryProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_RefractoryProductsMember_lbl" xml:lang="en-US" id="mtx_RefractoryProductsMember_lbl">Revenue from external customers from sale of Refractory products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RefractoryProductsMember" xlink:to="mtx_RefractoryProductsMember_lbl" xlink:title="label: RefractoryProductsMember to mtx_RefractoryProductsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_RefractoryProductsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RefractoryProductsMember_lbl1" xml:lang="en-US" id="mtx_RefractoryProductsMember_lbl1">Refractory Products [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RefractoryProductsMember" xlink:to="mtx_RefractoryProductsMember_lbl1" xlink:title="label: RefractoryProductsMember to mtx_RefractoryProductsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_BuildingMaterialsMember" xlink:label="BuildingMaterialsMember" xlink:title="BuildingMaterialsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_BuildingMaterialsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_BuildingMaterialsMember_lbl" xml:lang="en-US" id="mtx_BuildingMaterialsMember_lbl">Revenue from external customers from sale of Building Materials Products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BuildingMaterialsMember" xlink:to="mtx_BuildingMaterialsMember_lbl" xlink:title="label: BuildingMaterialsMember to mtx_BuildingMaterialsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_BuildingMaterialsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_BuildingMaterialsMember_lbl1" xml:lang="en-US" id="mtx_BuildingMaterialsMember_lbl1">Building Materials [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BuildingMaterialsMember" xlink:to="mtx_BuildingMaterialsMember_lbl1" xlink:title="label: BuildingMaterialsMember to mtx_BuildingMaterialsMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_BuildingMaterialsMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_BuildingMaterialsMember_lbl2" xml:lang="en-US" id="mtx_BuildingMaterialsMember_lbl2">Building Materials [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BuildingMaterialsMember" xlink:to="mtx_BuildingMaterialsMember_lbl2" xlink:title="label: BuildingMaterialsMember to mtx_BuildingMaterialsMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_HouseholdPersonalCareAndSpecialtyProductsMember" xlink:label="HouseholdPersonalCareAndSpecialtyProductsMember" xlink:title="HouseholdPersonalCareAndSpecialtyProductsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl" xml:lang="en-US" id="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl">Revenue from external customers from sale of Household, Personal Care and Specialty Products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HouseholdPersonalCareAndSpecialtyProductsMember" xlink:to="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl" xlink:title="label: HouseholdPersonalCareAndSpecialtyProductsMember to mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl1" xml:lang="en-US" id="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl1">Household, Personal Care and Specialty Products [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HouseholdPersonalCareAndSpecialtyProductsMember" xlink:to="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl1" xlink:title="label: HouseholdPersonalCareAndSpecialtyProductsMember to mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl2" xml:lang="en-US" id="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl2">Household, Personal Care and Specialty Products [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HouseholdPersonalCareAndSpecialtyProductsMember" xlink:to="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl2" xlink:title="label: HouseholdPersonalCareAndSpecialtyProductsMember to mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl2" />
    <link:label xlink:type="resource" xlink:label="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl3" xml:lang="en-US" id="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl3">Household, Personal Care &amp; Specialty Products [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="HouseholdPersonalCareAndSpecialtyProductsMember" xlink:to="mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl3" xlink:title="label: HouseholdPersonalCareAndSpecialtyProductsMember to mtx_HouseholdPersonalCareAndSpecialtyProductsMember_lbl3" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_SpecialtyPccMember" xlink:label="SpecialtyPccMember" xlink:title="SpecialtyPccMember" />
    <link:label xlink:type="resource" xlink:label="mtx_SpecialtyPccMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_SpecialtyPccMember_lbl" xml:lang="en-US" id="mtx_SpecialtyPccMember_lbl">Revenue from external customers from sale of Specialty PCC products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SpecialtyPccMember" xlink:to="mtx_SpecialtyPccMember_lbl" xlink:title="label: SpecialtyPccMember to mtx_SpecialtyPccMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_SpecialtyPccMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_SpecialtyPccMember_lbl1" xml:lang="en-US" id="mtx_SpecialtyPccMember_lbl1">Specialty PCC [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SpecialtyPccMember" xlink:to="mtx_SpecialtyPccMember_lbl1" xlink:title="label: SpecialtyPccMember to mtx_SpecialtyPccMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_PaperPccMember" xlink:label="PaperPccMember" xlink:title="PaperPccMember" />
    <link:label xlink:type="resource" xlink:label="mtx_PaperPccMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_PaperPccMember_lbl" xml:lang="en-US" id="mtx_PaperPccMember_lbl">Revenue from external customers from sale of Paper PCC products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaperPccMember" xlink:to="mtx_PaperPccMember_lbl" xlink:title="label: PaperPccMember to mtx_PaperPccMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_PaperPccMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_PaperPccMember_lbl1" xml:lang="en-US" id="mtx_PaperPccMember_lbl1">Paper PCC [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PaperPccMember" xlink:to="mtx_PaperPccMember_lbl1" xlink:title="label: PaperPccMember to mtx_PaperPccMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MetallurgicalProductsMember" xlink:label="MetallurgicalProductsMember" xlink:title="MetallurgicalProductsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_MetallurgicalProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MetallurgicalProductsMember_lbl" xml:lang="en-US" id="mtx_MetallurgicalProductsMember_lbl">Revenue from external customers from sale of Metallurgical products during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MetallurgicalProductsMember" xlink:to="mtx_MetallurgicalProductsMember_lbl" xlink:title="label: MetallurgicalProductsMember to mtx_MetallurgicalProductsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MetallurgicalProductsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MetallurgicalProductsMember_lbl1" xml:lang="en-US" id="mtx_MetallurgicalProductsMember_lbl1">Metallurgical Products [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MetallurgicalProductsMember" xlink:to="mtx_MetallurgicalProductsMember_lbl1" xlink:title="label: MetallurgicalProductsMember to mtx_MetallurgicalProductsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_PensionSettlementGainOrLossAndAmortization" xlink:label="PensionSettlementGainOrLossAndAmortization" xlink:title="PensionSettlementGainOrLossAndAmortization" />
    <link:label xlink:type="resource" xlink:label="mtx_PensionSettlementGainOrLossAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_PensionSettlementGainOrLossAndAmortization_lbl" xml:lang="en-US" id="mtx_PensionSettlementGainOrLossAndAmortization_lbl">The charge against earnings resulting from the amortization of pension and the charges against earnings resulting from pension settlements.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PensionSettlementGainOrLossAndAmortization" xlink:to="mtx_PensionSettlementGainOrLossAndAmortization_lbl" xlink:title="label: PensionSettlementGainOrLossAndAmortization to mtx_PensionSettlementGainOrLossAndAmortization_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_PensionSettlementGainOrLossAndAmortization_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_PensionSettlementGainOrLossAndAmortization_lbl1" xml:lang="en-US" id="mtx_PensionSettlementGainOrLossAndAmortization_lbl1">Pension Settlement Gain Or Loss And Amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PensionSettlementGainOrLossAndAmortization" xlink:to="mtx_PensionSettlementGainOrLossAndAmortization_lbl1" xlink:title="label: PensionSettlementGainOrLossAndAmortization to mtx_PensionSettlementGainOrLossAndAmortization_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_PensionSettlementGainOrLossAndAmortization_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_PensionSettlementGainOrLossAndAmortization_lbl2" xml:lang="en-US" id="mtx_PensionSettlementGainOrLossAndAmortization_lbl2">Pension amortization and settlement loss</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PensionSettlementGainOrLossAndAmortization" xlink:to="mtx_PensionSettlementGainOrLossAndAmortization_lbl2" xlink:title="label: PensionSettlementGainOrLossAndAmortization to mtx_PensionSettlementGainOrLossAndAmortization_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NonCashDebtModificationCosts" xlink:label="NonCashDebtModificationCosts" xlink:title="NonCashDebtModificationCosts" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashDebtModificationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NonCashDebtModificationCosts_lbl" xml:lang="en-US" id="mtx_NonCashDebtModificationCosts_lbl">Non-cash debt modification costs during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashDebtModificationCosts" xlink:to="mtx_NonCashDebtModificationCosts_lbl" xlink:title="label: NonCashDebtModificationCosts to mtx_NonCashDebtModificationCosts_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashDebtModificationCosts_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NonCashDebtModificationCosts_lbl1" xml:lang="en-US" id="mtx_NonCashDebtModificationCosts_lbl1">Non-cash Debt Modification Costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashDebtModificationCosts" xlink:to="mtx_NonCashDebtModificationCosts_lbl1" xlink:title="label: NonCashDebtModificationCosts to mtx_NonCashDebtModificationCosts_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashDebtModificationCosts_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_NonCashDebtModificationCosts_lbl2" xml:lang="en-US" id="mtx_NonCashDebtModificationCosts_lbl2">Non-cash debt modification costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashDebtModificationCosts" xlink:to="mtx_NonCashDebtModificationCosts_lbl2" xlink:title="label: NonCashDebtModificationCosts to mtx_NonCashDebtModificationCosts_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_OperatingLeaseRightOfUseAssetAmortization" xlink:label="OperatingLeaseRightOfUseAssetAmortization" xlink:title="OperatingLeaseRightOfUseAssetAmortization" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingLeaseRightOfUseAssetAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_OperatingLeaseRightOfUseAssetAmortization_lbl" xml:lang="en-US" id="mtx_OperatingLeaseRightOfUseAssetAmortization_lbl">Amount of amortization expense attributable to right-of-use asset from operating lease.</link:label>
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_SivomaticMember" xlink:label="SivomaticMember" xlink:title="SivomaticMember" />
    <link:label xlink:type="resource" xlink:label="mtx_SivomaticMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_SivomaticMember_lbl" xml:lang="en-US" id="mtx_SivomaticMember_lbl">Sivomatic a leading European supplier of premium pet litter products. Sivomatic is a vertically integrated manufacturer, with production facilities in the Netherlands, Austria and Turkey. With a leading position in premier clumping products, their product portfolio spans the range of pet litter derived from bentonite, sourced predominantly from wholly-owned mines in Turkey.</link:label>
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpenses" xlink:label="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpenses" xlink:title="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpenses" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMineralRights" xlink:label="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMineralRights" xlink:title="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMineralRights" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward_lbl" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward_lbl">A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</link:label>
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    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantExercisedOrVestedInPeriod_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantExercisedOrVestedInPeriod_lbl1" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantExercisedOrVestedInPeriod_lbl1">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant, Exercised or Vested in Period</link:label>
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantsInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantsInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantsInPeriod" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantsInPeriod_lbl" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantsInPeriod_lbl">The number of shares granted during the period which reduced the number of shares available for grant under the plan at the end of the reporting period.</link:label>
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod" xlink:label="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod" xlink:title="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl1" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl2" xml:lang="en-US" id="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl2">Canceled (in shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod" xlink:to="mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl2" xlink:title="label: ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod to mtx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantForfeitedInPeriod_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FixedRateTrancheMember" xlink:label="FixedRateTrancheMember" xlink:title="FixedRateTrancheMember" />
    <link:label xlink:type="resource" xlink:label="mtx_FixedRateTrancheMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FixedRateTrancheMember_lbl" xml:lang="en-US" id="mtx_FixedRateTrancheMember_lbl">Refers to fixed interest rate tranche.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FixedRateTrancheMember" xlink:to="mtx_FixedRateTrancheMember_lbl" xlink:title="label: FixedRateTrancheMember to mtx_FixedRateTrancheMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FixedRateTrancheMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FixedRateTrancheMember_lbl1" xml:lang="en-US" id="mtx_FixedRateTrancheMember_lbl1">Fixed Rate Tranche [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FixedRateTrancheMember" xlink:to="mtx_FixedRateTrancheMember_lbl1" xlink:title="label: FixedRateTrancheMember to mtx_FixedRateTrancheMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FloatingRateTrancheMember" xlink:label="FloatingRateTrancheMember" xlink:title="FloatingRateTrancheMember" />
    <link:label xlink:type="resource" xlink:label="mtx_FloatingRateTrancheMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FloatingRateTrancheMember_lbl" xml:lang="en-US" id="mtx_FloatingRateTrancheMember_lbl">Refers to floating interest rate tranche.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FloatingRateTrancheMember" xlink:to="mtx_FloatingRateTrancheMember_lbl" xlink:title="label: FloatingRateTrancheMember to mtx_FloatingRateTrancheMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FloatingRateTrancheMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FloatingRateTrancheMember_lbl1" xml:lang="en-US" id="mtx_FloatingRateTrancheMember_lbl1">Floating Rate Tranche [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FloatingRateTrancheMember" xlink:to="mtx_FloatingRateTrancheMember_lbl1" xlink:title="label: FloatingRateTrancheMember to mtx_FloatingRateTrancheMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FloatingRateTrancheMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FloatingRateTrancheMember_lbl2" xml:lang="en-US" id="mtx_FloatingRateTrancheMember_lbl2">Variable Rate Tranche [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FloatingRateTrancheMember" xlink:to="mtx_FloatingRateTrancheMember_lbl2" xlink:title="label: FloatingRateTrancheMember to mtx_FloatingRateTrancheMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EuroInterbankOfferedRateEuriborMember" xlink:label="EuroInterbankOfferedRateEuriborMember" xlink:title="EuroInterbankOfferedRateEuriborMember" />
    <link:label xlink:type="resource" xlink:label="mtx_EuroInterbankOfferedRateEuriborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EuroInterbankOfferedRateEuriborMember_lbl" xml:lang="en-US" id="mtx_EuroInterbankOfferedRateEuriborMember_lbl">Interest rate at which a bank borrows funds from other banks in the Euro interbank market.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EuroInterbankOfferedRateEuriborMember" xlink:to="mtx_EuroInterbankOfferedRateEuriborMember_lbl" xlink:title="label: EuroInterbankOfferedRateEuriborMember to mtx_EuroInterbankOfferedRateEuriborMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EuroInterbankOfferedRateEuriborMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EuroInterbankOfferedRateEuriborMember_lbl1" xml:lang="en-US" id="mtx_EuroInterbankOfferedRateEuriborMember_lbl1">Euro Interbank Offered Rate (Euribor) [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EuroInterbankOfferedRateEuriborMember" xlink:to="mtx_EuroInterbankOfferedRateEuriborMember_lbl1" xlink:title="label: EuroInterbankOfferedRateEuriborMember to mtx_EuroInterbankOfferedRateEuriborMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_EuroInterbankOfferedRateEuriborMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_EuroInterbankOfferedRateEuriborMember_lbl2" xml:lang="en-US" id="mtx_EuroInterbankOfferedRateEuriborMember_lbl2">Euribor [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EuroInterbankOfferedRateEuriborMember" xlink:to="mtx_EuroInterbankOfferedRateEuriborMember_lbl2" xlink:title="label: EuroInterbankOfferedRateEuriborMember to mtx_EuroInterbankOfferedRateEuriborMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RevolvingFacilityThirdAmendmentMember" xlink:label="RevolvingFacilityThirdAmendmentMember" xlink:title="RevolvingFacilityThirdAmendmentMember" />
    <link:label xlink:type="resource" xlink:label="mtx_RevolvingFacilityThirdAmendmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_RevolvingFacilityThirdAmendmentMember_lbl" xml:lang="en-US" id="mtx_RevolvingFacilityThirdAmendmentMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the revolving facility third amendment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevolvingFacilityThirdAmendmentMember" xlink:to="mtx_RevolvingFacilityThirdAmendmentMember_lbl" xlink:title="label: RevolvingFacilityThirdAmendmentMember to mtx_RevolvingFacilityThirdAmendmentMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_RevolvingFacilityThirdAmendmentMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RevolvingFacilityThirdAmendmentMember_lbl1" xml:lang="en-US" id="mtx_RevolvingFacilityThirdAmendmentMember_lbl1">Revolving Facility Third Amendment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevolvingFacilityThirdAmendmentMember" xlink:to="mtx_RevolvingFacilityThirdAmendmentMember_lbl1" xlink:title="label: RevolvingFacilityThirdAmendmentMember to mtx_RevolvingFacilityThirdAmendmentMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_RevolvingFacilityThirdAmendmentMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_RevolvingFacilityThirdAmendmentMember_lbl2" xml:lang="en-US" id="mtx_RevolvingFacilityThirdAmendmentMember_lbl2">Revolving Facility Third Amendment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevolvingFacilityThirdAmendmentMember" xlink:to="mtx_RevolvingFacilityThirdAmendmentMember_lbl2" xlink:title="label: RevolvingFacilityThirdAmendmentMember to mtx_RevolvingFacilityThirdAmendmentMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanFacilityFirstAmendmentMember" xlink:label="TermLoanFacilityFirstAmendmentMember" xlink:title="TermLoanFacilityFirstAmendmentMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityFirstAmendmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanFacilityFirstAmendmentMember_lbl" xml:lang="en-US" id="mtx_TermLoanFacilityFirstAmendmentMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the term loan facility first amendment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityFirstAmendmentMember" xlink:to="mtx_TermLoanFacilityFirstAmendmentMember_lbl" xlink:title="label: TermLoanFacilityFirstAmendmentMember to mtx_TermLoanFacilityFirstAmendmentMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityFirstAmendmentMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanFacilityFirstAmendmentMember_lbl1" xml:lang="en-US" id="mtx_TermLoanFacilityFirstAmendmentMember_lbl1">Term Loan Facility First Amendment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityFirstAmendmentMember" xlink:to="mtx_TermLoanFacilityFirstAmendmentMember_lbl1" xlink:title="label: TermLoanFacilityFirstAmendmentMember to mtx_TermLoanFacilityFirstAmendmentMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityFirstAmendmentMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_TermLoanFacilityFirstAmendmentMember_lbl2" xml:lang="en-US" id="mtx_TermLoanFacilityFirstAmendmentMember_lbl2">Term Loan Facility First Amendment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityFirstAmendmentMember" xlink:to="mtx_TermLoanFacilityFirstAmendmentMember_lbl2" xlink:title="label: TermLoanFacilityFirstAmendmentMember to mtx_TermLoanFacilityFirstAmendmentMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_CommittedLoanFacilityMember" xlink:label="CommittedLoanFacilityMember" xlink:title="CommittedLoanFacilityMember" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_CommittedLoanFacilityMember_lbl" xml:lang="en-US" id="mtx_CommittedLoanFacilityMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the committed Loan facility for China location.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityMember" xlink:to="mtx_CommittedLoanFacilityMember_lbl" xlink:title="label: CommittedLoanFacilityMember to mtx_CommittedLoanFacilityMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_CommittedLoanFacilityMember_lbl1" xml:lang="en-US" id="mtx_CommittedLoanFacilityMember_lbl1">Committed Loan facility [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityMember" xlink:to="mtx_CommittedLoanFacilityMember_lbl1" xlink:title="label: CommittedLoanFacilityMember to mtx_CommittedLoanFacilityMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_CommittedLoanFacilityMember_lbl2" xml:lang="en-US" id="mtx_CommittedLoanFacilityMember_lbl2">China Loan Facilities [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityMember" xlink:to="mtx_CommittedLoanFacilityMember_lbl2" xlink:title="label: CommittedLoanFacilityMember to mtx_CommittedLoanFacilityMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate" xlink:label="DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate" xlink:title="DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl" xml:lang="en-US" id="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl">The increase (decrease) in the percentage points added to the reference rate to compute the variable rate on the debt instrument.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate" xlink:to="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl" xlink:title="label: DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate to mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl1" xml:lang="en-US" id="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl1">Debt Instrument,, Increase (decrease) in basis spread on variable rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate" xlink:to="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl1" xlink:title="label: DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate to mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl2" xml:lang="en-US" id="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl2">Decrease in basis spread on variable rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate" xlink:to="mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl2" xlink:title="label: DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate to mtx_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanFacilitySecondAmendmentMember" xlink:label="TermLoanFacilitySecondAmendmentMember" xlink:title="TermLoanFacilitySecondAmendmentMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilitySecondAmendmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanFacilitySecondAmendmentMember_lbl" xml:lang="en-US" id="mtx_TermLoanFacilitySecondAmendmentMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the term loan facility second amendment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilitySecondAmendmentMember" xlink:to="mtx_TermLoanFacilitySecondAmendmentMember_lbl" xlink:title="label: TermLoanFacilitySecondAmendmentMember to mtx_TermLoanFacilitySecondAmendmentMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilitySecondAmendmentMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanFacilitySecondAmendmentMember_lbl1" xml:lang="en-US" id="mtx_TermLoanFacilitySecondAmendmentMember_lbl1">Term Loan Facility Second Amendment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilitySecondAmendmentMember" xlink:to="mtx_TermLoanFacilitySecondAmendmentMember_lbl1" xlink:title="label: TermLoanFacilitySecondAmendmentMember to mtx_TermLoanFacilitySecondAmendmentMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilitySecondAmendmentMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_TermLoanFacilitySecondAmendmentMember_lbl2" xml:lang="en-US" id="mtx_TermLoanFacilitySecondAmendmentMember_lbl2">Term Loan Facility Second Amendment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilitySecondAmendmentMember" xlink:to="mtx_TermLoanFacilitySecondAmendmentMember_lbl2" xlink:title="label: TermLoanFacilitySecondAmendmentMember to mtx_TermLoanFacilitySecondAmendmentMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_CommittedLoanFacilityOfChinaAndJapanMember" xlink:label="CommittedLoanFacilityOfChinaAndJapanMember" xlink:title="CommittedLoanFacilityOfChinaAndJapanMember" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl" xml:lang="en-US" id="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the committed Loan facility for Japan and China location.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityOfChinaAndJapanMember" xlink:to="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl" xlink:title="label: CommittedLoanFacilityOfChinaAndJapanMember to mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl1" xml:lang="en-US" id="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl1">Committed Loan Facility of China and Japan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityOfChinaAndJapanMember" xlink:to="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl1" xlink:title="label: CommittedLoanFacilityOfChinaAndJapanMember to mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl2" xml:lang="en-US" id="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl2">Combined Loan Facility of China and Japan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityOfChinaAndJapanMember" xlink:to="mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl2" xlink:title="label: CommittedLoanFacilityOfChinaAndJapanMember to mtx_CommittedLoanFacilityOfChinaAndJapanMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanInNetherlandsDueIn2022Member" xlink:label="TermLoanInNetherlandsDueIn2022Member" xlink:title="TermLoanInNetherlandsDueIn2022Member" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanInNetherlandsDueIn2022Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanInNetherlandsDueIn2022Member_lbl" xml:lang="en-US" id="mtx_TermLoanInNetherlandsDueIn2022Member_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the Loan facility for Netherland location.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanInNetherlandsDueIn2022Member" xlink:to="mtx_TermLoanInNetherlandsDueIn2022Member_lbl" xlink:title="label: TermLoanInNetherlandsDueIn2022Member to mtx_TermLoanInNetherlandsDueIn2022Member_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanInNetherlandsDueIn2022Member_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanInNetherlandsDueIn2022Member_lbl1" xml:lang="en-US" id="mtx_TermLoanInNetherlandsDueIn2022Member_lbl1">Term Loan in Netherlands Due in 2022 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanInNetherlandsDueIn2022Member" xlink:to="mtx_TermLoanInNetherlandsDueIn2022Member_lbl1" xlink:title="label: TermLoanInNetherlandsDueIn2022Member to mtx_TermLoanInNetherlandsDueIn2022Member_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanInNetherlandsDueIn2022Member_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_TermLoanInNetherlandsDueIn2022Member_lbl2" xml:lang="en-US" id="mtx_TermLoanInNetherlandsDueIn2022Member_lbl2">Netherlands Term Loan Due 2022 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanInNetherlandsDueIn2022Member" xlink:to="mtx_TermLoanInNetherlandsDueIn2022Member_lbl2" xlink:title="label: TermLoanInNetherlandsDueIn2022Member to mtx_TermLoanInNetherlandsDueIn2022Member_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanFacilityMember" xlink:label="TermLoanFacilityMember" xlink:title="TermLoanFacilityMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanFacilityMember_lbl" xml:lang="en-US" id="mtx_TermLoanFacilityMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the term loan facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityMember" xlink:to="mtx_TermLoanFacilityMember_lbl" xlink:title="label: TermLoanFacilityMember to mtx_TermLoanFacilityMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanFacilityMember_lbl1" xml:lang="en-US" id="mtx_TermLoanFacilityMember_lbl1">Term Loan Facility [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityMember" xlink:to="mtx_TermLoanFacilityMember_lbl1" xlink:title="label: TermLoanFacilityMember to mtx_TermLoanFacilityMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_TermLoanFacilityMember_lbl2" xml:lang="en-US" id="mtx_TermLoanFacilityMember_lbl2">Term Loan Facility [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityMember" xlink:to="mtx_TermLoanFacilityMember_lbl2" xlink:title="label: TermLoanFacilityMember to mtx_TermLoanFacilityMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanFacilityOneMember" xlink:label="TermLoanFacilityOneMember" xlink:title="TermLoanFacilityOneMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanFacilityOneMember_lbl" xml:lang="en-US" id="mtx_TermLoanFacilityOneMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the term loan facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityOneMember" xlink:to="mtx_TermLoanFacilityOneMember_lbl" xlink:title="label: TermLoanFacilityOneMember to mtx_TermLoanFacilityOneMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityOneMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanFacilityOneMember_lbl1" xml:lang="en-US" id="mtx_TermLoanFacilityOneMember_lbl1">Term Loan Facility one [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityOneMember" xlink:to="mtx_TermLoanFacilityOneMember_lbl1" xlink:title="label: TermLoanFacilityOneMember to mtx_TermLoanFacilityOneMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityOneMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_TermLoanFacilityOneMember_lbl2" xml:lang="en-US" id="mtx_TermLoanFacilityOneMember_lbl2">Term Loan Facility, Due February 14, 2024 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityOneMember" xlink:to="mtx_TermLoanFacilityOneMember_lbl2" xlink:title="label: TermLoanFacilityOneMember to mtx_TermLoanFacilityOneMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanFacilityTwoMember" xlink:label="TermLoanFacilityTwoMember" xlink:title="TermLoanFacilityTwoMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanFacilityTwoMember_lbl" xml:lang="en-US" id="mtx_TermLoanFacilityTwoMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the term loan facility.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityTwoMember" xlink:to="mtx_TermLoanFacilityTwoMember_lbl" xlink:title="label: TermLoanFacilityTwoMember to mtx_TermLoanFacilityTwoMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityTwoMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanFacilityTwoMember_lbl1" xml:lang="en-US" id="mtx_TermLoanFacilityTwoMember_lbl1">Term Loan Facility Two [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityTwoMember" xlink:to="mtx_TermLoanFacilityTwoMember_lbl1" xlink:title="label: TermLoanFacilityTwoMember to mtx_TermLoanFacilityTwoMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanFacilityTwoMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_TermLoanFacilityTwoMember_lbl2" xml:lang="en-US" id="mtx_TermLoanFacilityTwoMember_lbl2">Term Loan Facility Due May 9, 2021 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanFacilityTwoMember" xlink:to="mtx_TermLoanFacilityTwoMember_lbl2" xlink:title="label: TermLoanFacilityTwoMember to mtx_TermLoanFacilityTwoMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_CommittedLoanFacilityInJapanMember" xlink:label="CommittedLoanFacilityInJapanMember" xlink:title="CommittedLoanFacilityInJapanMember" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityInJapanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_CommittedLoanFacilityInJapanMember_lbl" xml:lang="en-US" id="mtx_CommittedLoanFacilityInJapanMember_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the committed Loan facility for Japan location.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityInJapanMember" xlink:to="mtx_CommittedLoanFacilityInJapanMember_lbl" xlink:title="label: CommittedLoanFacilityInJapanMember to mtx_CommittedLoanFacilityInJapanMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityInJapanMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_CommittedLoanFacilityInJapanMember_lbl1" xml:lang="en-US" id="mtx_CommittedLoanFacilityInJapanMember_lbl1">Committed Loan Facility in Japan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityInJapanMember" xlink:to="mtx_CommittedLoanFacilityInJapanMember_lbl1" xlink:title="label: CommittedLoanFacilityInJapanMember to mtx_CommittedLoanFacilityInJapanMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_CommittedLoanFacilityInJapanMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_CommittedLoanFacilityInJapanMember_lbl2" xml:lang="en-US" id="mtx_CommittedLoanFacilityInJapanMember_lbl2">Japan Loan Facilities [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommittedLoanFacilityInJapanMember" xlink:to="mtx_CommittedLoanFacilityInJapanMember_lbl2" xlink:title="label: CommittedLoanFacilityInJapanMember to mtx_CommittedLoanFacilityInJapanMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DebtInstrumentNetLeverageRatio" xlink:label="DebtInstrumentNetLeverageRatio" xlink:title="DebtInstrumentNetLeverageRatio" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentNetLeverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DebtInstrumentNetLeverageRatio_lbl" xml:lang="en-US" id="mtx_DebtInstrumentNetLeverageRatio_lbl">Refers to net leverage ratio as defined in the credit agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentNetLeverageRatio" xlink:to="mtx_DebtInstrumentNetLeverageRatio_lbl" xlink:title="label: DebtInstrumentNetLeverageRatio to mtx_DebtInstrumentNetLeverageRatio_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentNetLeverageRatio_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DebtInstrumentNetLeverageRatio_lbl1" xml:lang="en-US" id="mtx_DebtInstrumentNetLeverageRatio_lbl1">Debt Instrument Net Leverage Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentNetLeverageRatio" xlink:to="mtx_DebtInstrumentNetLeverageRatio_lbl1" xlink:title="label: DebtInstrumentNetLeverageRatio to mtx_DebtInstrumentNetLeverageRatio_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentNetLeverageRatio_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_DebtInstrumentNetLeverageRatio_lbl2" xml:lang="en-US" id="mtx_DebtInstrumentNetLeverageRatio_lbl2">Net leverage ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentNetLeverageRatio" xlink:to="mtx_DebtInstrumentNetLeverageRatio_lbl2" xlink:title="label: DebtInstrumentNetLeverageRatio to mtx_DebtInstrumentNetLeverageRatio_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AmortizationRateOnNotes" xlink:label="AmortizationRateOnNotes" xlink:title="AmortizationRateOnNotes" />
    <link:label xlink:type="resource" xlink:label="mtx_AmortizationRateOnNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AmortizationRateOnNotes_lbl" xml:lang="en-US" id="mtx_AmortizationRateOnNotes_lbl">Amortization rate on notes during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmortizationRateOnNotes" xlink:to="mtx_AmortizationRateOnNotes_lbl" xlink:title="label: AmortizationRateOnNotes to mtx_AmortizationRateOnNotes_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AmortizationRateOnNotes_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AmortizationRateOnNotes_lbl1" xml:lang="en-US" id="mtx_AmortizationRateOnNotes_lbl1">Amortization rate on notes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmortizationRateOnNotes" xlink:to="mtx_AmortizationRateOnNotes_lbl1" xlink:title="label: AmortizationRateOnNotes to mtx_AmortizationRateOnNotes_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AmortizationRateOnNotes_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_AmortizationRateOnNotes_lbl2" xml:lang="en-US" id="mtx_AmortizationRateOnNotes_lbl2">Amortization rate on notes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmortizationRateOnNotes" xlink:to="mtx_AmortizationRateOnNotes_lbl2" xlink:title="label: AmortizationRateOnNotes to mtx_AmortizationRateOnNotes_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NumberOfTermLoans" xlink:label="NumberOfTermLoans" xlink:title="NumberOfTermLoans" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfTermLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NumberOfTermLoans_lbl" xml:lang="en-US" id="mtx_NumberOfTermLoans_lbl">This element represents number of term loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfTermLoans" xlink:to="mtx_NumberOfTermLoans_lbl" xlink:title="label: NumberOfTermLoans to mtx_NumberOfTermLoans_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfTermLoans_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NumberOfTermLoans_lbl1" xml:lang="en-US" id="mtx_NumberOfTermLoans_lbl1">Number of Term Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfTermLoans" xlink:to="mtx_NumberOfTermLoans_lbl1" xlink:title="label: NumberOfTermLoans to mtx_NumberOfTermLoans_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfTermLoans_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_NumberOfTermLoans_lbl2" xml:lang="en-US" id="mtx_NumberOfTermLoans_lbl2">Number of term loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfTermLoans" xlink:to="mtx_NumberOfTermLoans_lbl2" xlink:title="label: NumberOfTermLoans to mtx_NumberOfTermLoans_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TermLoanInNetherlandsDueIn2020Member" xlink:label="TermLoanInNetherlandsDueIn2020Member" xlink:title="TermLoanInNetherlandsDueIn2020Member" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanInNetherlandsDueIn2020Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TermLoanInNetherlandsDueIn2020Member_lbl" xml:lang="en-US" id="mtx_TermLoanInNetherlandsDueIn2020Member_lbl">A debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer. This category includes the Loan facility for Netherland location.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanInNetherlandsDueIn2020Member" xlink:to="mtx_TermLoanInNetherlandsDueIn2020Member_lbl" xlink:title="label: TermLoanInNetherlandsDueIn2020Member to mtx_TermLoanInNetherlandsDueIn2020Member_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanInNetherlandsDueIn2020Member_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TermLoanInNetherlandsDueIn2020Member_lbl1" xml:lang="en-US" id="mtx_TermLoanInNetherlandsDueIn2020Member_lbl1">Term Loan in Netherlands Due in 2020 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanInNetherlandsDueIn2020Member" xlink:to="mtx_TermLoanInNetherlandsDueIn2020Member_lbl1" xlink:title="label: TermLoanInNetherlandsDueIn2020Member to mtx_TermLoanInNetherlandsDueIn2020Member_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_TermLoanInNetherlandsDueIn2020Member_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_TermLoanInNetherlandsDueIn2020Member_lbl2" xml:lang="en-US" id="mtx_TermLoanInNetherlandsDueIn2020Member_lbl2">Netherlands Term Loan Due 2020 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TermLoanInNetherlandsDueIn2020Member" xlink:to="mtx_TermLoanInNetherlandsDueIn2020Member_lbl2" xlink:title="label: TermLoanInNetherlandsDueIn2020Member to mtx_TermLoanInNetherlandsDueIn2020Member_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RequiredAnnualAmortization" xlink:label="RequiredAnnualAmortization" xlink:title="RequiredAnnualAmortization" />
    <link:label xlink:type="resource" xlink:label="mtx_RequiredAnnualAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_RequiredAnnualAmortization_lbl" xml:lang="en-US" id="mtx_RequiredAnnualAmortization_lbl">The required annual amortization.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RequiredAnnualAmortization" xlink:to="mtx_RequiredAnnualAmortization_lbl" xlink:title="label: RequiredAnnualAmortization to mtx_RequiredAnnualAmortization_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_RequiredAnnualAmortization_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RequiredAnnualAmortization_lbl1" xml:lang="en-US" id="mtx_RequiredAnnualAmortization_lbl1">Required annual amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RequiredAnnualAmortization" xlink:to="mtx_RequiredAnnualAmortization_lbl1" xlink:title="label: RequiredAnnualAmortization to mtx_RequiredAnnualAmortization_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_RequiredAnnualAmortization_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_RequiredAnnualAmortization_lbl2" xml:lang="en-US" id="mtx_RequiredAnnualAmortization_lbl2">Required annual amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RequiredAnnualAmortization" xlink:to="mtx_RequiredAnnualAmortization_lbl2" xlink:title="label: RequiredAnnualAmortization to mtx_RequiredAnnualAmortization_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DebtInstrumentIssuePricePercentage" xlink:label="DebtInstrumentIssuePricePercentage" xlink:title="DebtInstrumentIssuePricePercentage" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentIssuePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DebtInstrumentIssuePricePercentage_lbl" xml:lang="en-US" id="mtx_DebtInstrumentIssuePricePercentage_lbl">Percentage price of original principal amount of debt at which debt was issued.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentIssuePricePercentage" xlink:to="mtx_DebtInstrumentIssuePricePercentage_lbl" xlink:title="label: DebtInstrumentIssuePricePercentage to mtx_DebtInstrumentIssuePricePercentage_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentIssuePricePercentage_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DebtInstrumentIssuePricePercentage_lbl1" xml:lang="en-US" id="mtx_DebtInstrumentIssuePricePercentage_lbl1">Debt Instrument, Issue Price, Percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentIssuePricePercentage" xlink:to="mtx_DebtInstrumentIssuePricePercentage_lbl1" xlink:title="label: DebtInstrumentIssuePricePercentage to mtx_DebtInstrumentIssuePricePercentage_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_DebtInstrumentIssuePricePercentage_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_DebtInstrumentIssuePricePercentage_lbl2" xml:lang="en-US" id="mtx_DebtInstrumentIssuePricePercentage_lbl2">Debt issue discount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DebtInstrumentIssuePricePercentage" xlink:to="mtx_DebtInstrumentIssuePricePercentage_lbl2" xlink:title="label: DebtInstrumentIssuePricePercentage to mtx_DebtInstrumentIssuePricePercentage_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AcquiredFiniteLivedIntangibleAssetsMember" xlink:label="AcquiredFiniteLivedIntangibleAssetsMember" xlink:title="AcquiredFiniteLivedIntangibleAssetsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl" xml:lang="en-US" id="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl">Acquired intangible assets that are subject to amortization.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AcquiredFiniteLivedIntangibleAssetsMember" xlink:to="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl" xlink:title="label: AcquiredFiniteLivedIntangibleAssetsMember to mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl1" xml:lang="en-US" id="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl1">Acquired Finite-Lived Intangible Assets [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AcquiredFiniteLivedIntangibleAssetsMember" xlink:to="mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl1" xlink:title="label: AcquiredFiniteLivedIntangibleAssetsMember to mtx_AcquiredFiniteLivedIntangibleAssetsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MarketPriceRangePerShareOfCommonStockAbstract" xlink:label="MarketPriceRangePerShareOfCommonStockAbstract" xlink:title="MarketPriceRangePerShareOfCommonStockAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceRangePerShareOfCommonStockAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MarketPriceRangePerShareOfCommonStockAbstract_lbl1" xml:lang="en-US" id="mtx_MarketPriceRangePerShareOfCommonStockAbstract_lbl1">Market price range per share of common stock [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceRangePerShareOfCommonStockAbstract" xlink:to="mtx_MarketPriceRangePerShareOfCommonStockAbstract_lbl1" xlink:title="label: MarketPriceRangePerShareOfCommonStockAbstract to mtx_MarketPriceRangePerShareOfCommonStockAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MarketPriceOfCommonStockClose" xlink:label="MarketPriceOfCommonStockClose" xlink:title="MarketPriceOfCommonStockClose" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockClose_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MarketPriceOfCommonStockClose_lbl" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockClose_lbl">The closing price of common stock as of the end of the reporting period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockClose" xlink:to="mtx_MarketPriceOfCommonStockClose_lbl" xlink:title="label: MarketPriceOfCommonStockClose to mtx_MarketPriceOfCommonStockClose_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockClose_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MarketPriceOfCommonStockClose_lbl1" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockClose_lbl1">Market price of common stock, Close</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockClose" xlink:to="mtx_MarketPriceOfCommonStockClose_lbl1" xlink:title="label: MarketPriceOfCommonStockClose to mtx_MarketPriceOfCommonStockClose_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockClose_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_MarketPriceOfCommonStockClose_lbl2" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockClose_lbl2">Close (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockClose" xlink:to="mtx_MarketPriceOfCommonStockClose_lbl2" xlink:title="label: MarketPriceOfCommonStockClose to mtx_MarketPriceOfCommonStockClose_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MarketPriceOfCommonStockHigh" xlink:label="MarketPriceOfCommonStockHigh" xlink:title="MarketPriceOfCommonStockHigh" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockHigh_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MarketPriceOfCommonStockHigh_lbl" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockHigh_lbl">The highest market price of common stock for the period under review.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockHigh" xlink:to="mtx_MarketPriceOfCommonStockHigh_lbl" xlink:title="label: MarketPriceOfCommonStockHigh to mtx_MarketPriceOfCommonStockHigh_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockHigh_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MarketPriceOfCommonStockHigh_lbl1" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockHigh_lbl1">Market price of common stock, High</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockHigh" xlink:to="mtx_MarketPriceOfCommonStockHigh_lbl1" xlink:title="label: MarketPriceOfCommonStockHigh to mtx_MarketPriceOfCommonStockHigh_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockHigh_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_MarketPriceOfCommonStockHigh_lbl2" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockHigh_lbl2">High (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockHigh" xlink:to="mtx_MarketPriceOfCommonStockHigh_lbl2" xlink:title="label: MarketPriceOfCommonStockHigh to mtx_MarketPriceOfCommonStockHigh_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MarketPriceOfCommonStockLow" xlink:label="MarketPriceOfCommonStockLow" xlink:title="MarketPriceOfCommonStockLow" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockLow_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MarketPriceOfCommonStockLow_lbl" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockLow_lbl">The lowest market price of common stock for the period under review.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockLow" xlink:to="mtx_MarketPriceOfCommonStockLow_lbl" xlink:title="label: MarketPriceOfCommonStockLow to mtx_MarketPriceOfCommonStockLow_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockLow_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MarketPriceOfCommonStockLow_lbl1" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockLow_lbl1">Market price of common stock, Low</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockLow" xlink:to="mtx_MarketPriceOfCommonStockLow_lbl1" xlink:title="label: MarketPriceOfCommonStockLow to mtx_MarketPriceOfCommonStockLow_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_MarketPriceOfCommonStockLow_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_MarketPriceOfCommonStockLow_lbl2" xml:lang="en-US" id="mtx_MarketPriceOfCommonStockLow_lbl2">Low (in dollars per share)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MarketPriceOfCommonStockLow" xlink:to="mtx_MarketPriceOfCommonStockLow_lbl2" xlink:title="label: MarketPriceOfCommonStockLow to mtx_MarketPriceOfCommonStockLow_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_OperatingLossCarryforwardsAbstract" xlink:label="OperatingLossCarryforwardsAbstract" xlink:title="OperatingLossCarryforwardsAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingLossCarryforwardsAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_OperatingLossCarryforwardsAbstract_lbl1" xml:lang="en-US" id="mtx_OperatingLossCarryforwardsAbstract_lbl1">Operating Loss Carryforwards [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwardsAbstract" xlink:to="mtx_OperatingLossCarryforwardsAbstract_lbl1" xlink:title="label: OperatingLossCarryforwardsAbstract to mtx_OperatingLossCarryforwardsAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingLossCarryforwardsAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_OperatingLossCarryforwardsAbstract_lbl2" xml:lang="en-US" id="mtx_OperatingLossCarryforwardsAbstract_lbl2">Operating loss carryforwards [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwardsAbstract" xlink:to="mtx_OperatingLossCarryforwardsAbstract_lbl2" xlink:title="label: OperatingLossCarryforwardsAbstract to mtx_OperatingLossCarryforwardsAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations" xlink:label="DecreasesRelatedToAuditSettlementsAndStatuteExpirations" xlink:title="DecreasesRelatedToAuditSettlementsAndStatuteExpirations" />
    <link:label xlink:type="resource" xlink:label="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl" xml:lang="en-US" id="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl">The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities and lapses of the applicable statutes of limitations.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DecreasesRelatedToAuditSettlementsAndStatuteExpirations" xlink:to="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl" xlink:title="label: DecreasesRelatedToAuditSettlementsAndStatuteExpirations to mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl1" xml:lang="en-US" id="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl1">Decreases related to audit settlements and statute expirations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DecreasesRelatedToAuditSettlementsAndStatuteExpirations" xlink:to="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl1" xlink:title="label: DecreasesRelatedToAuditSettlementsAndStatuteExpirations to mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl2" xml:lang="en-US" id="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl2">Decreases related to audit settlements and statute expirations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DecreasesRelatedToAuditSettlementsAndStatuteExpirations" xlink:to="mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl2" xlink:title="label: DecreasesRelatedToAuditSettlementsAndStatuteExpirations to mtx_DecreasesRelatedToAuditSettlementsAndStatuteExpirations_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_UndistributedEarningsOfForeignSubsidiariesAbstract" xlink:label="UndistributedEarningsOfForeignSubsidiariesAbstract" xlink:title="UndistributedEarningsOfForeignSubsidiariesAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_UndistributedEarningsOfForeignSubsidiariesAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_UndistributedEarningsOfForeignSubsidiariesAbstract_lbl1" xml:lang="en-US" id="mtx_UndistributedEarningsOfForeignSubsidiariesAbstract_lbl1">Undistributed earnings of foreign subsidiaries [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="UndistributedEarningsOfForeignSubsidiariesAbstract" xlink:to="mtx_UndistributedEarningsOfForeignSubsidiariesAbstract_lbl1" xlink:title="label: UndistributedEarningsOfForeignSubsidiariesAbstract to mtx_UndistributedEarningsOfForeignSubsidiariesAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent" xlink:label="EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent" xlink:title="EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent" />
    <link:label xlink:type="resource" xlink:label="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl" xml:lang="en-US" id="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl">Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to Global Intangible Low-Tax Income (GILTI).</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent" xlink:to="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl" xlink:title="label: EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent to mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl1" xml:lang="en-US" id="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl1">Effective Income Tax Rate Reconciliation, Global Intangible Low Taxed Income, Percent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent" xlink:to="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl1" xlink:title="label: EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent to mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl2" xml:lang="en-US" id="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl2">Global Intangible Low-Tax Income (GILTI)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent" xlink:to="mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl2" xlink:title="label: EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent to mtx_EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomePercent_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_OperatingLossCarryforwardsExpirationYear" xlink:label="OperatingLossCarryforwardsExpirationYear" xlink:title="OperatingLossCarryforwardsExpirationYear" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingLossCarryforwardsExpirationYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_OperatingLossCarryforwardsExpirationYear_lbl" xml:lang="en-US" id="mtx_OperatingLossCarryforwardsExpirationYear_lbl">Expiration year of each operating loss carryforward included in operating loss carryforward, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwardsExpirationYear" xlink:to="mtx_OperatingLossCarryforwardsExpirationYear_lbl" xlink:title="label: OperatingLossCarryforwardsExpirationYear to mtx_OperatingLossCarryforwardsExpirationYear_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingLossCarryforwardsExpirationYear_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_OperatingLossCarryforwardsExpirationYear_lbl1" xml:lang="en-US" id="mtx_OperatingLossCarryforwardsExpirationYear_lbl1">Operating Loss Carryforwards, Expiration Year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwardsExpirationYear" xlink:to="mtx_OperatingLossCarryforwardsExpirationYear_lbl1" xlink:title="label: OperatingLossCarryforwardsExpirationYear to mtx_OperatingLossCarryforwardsExpirationYear_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingLossCarryforwardsExpirationYear_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_OperatingLossCarryforwardsExpirationYear_lbl2" xml:lang="en-US" id="mtx_OperatingLossCarryforwardsExpirationYear_lbl2">Expiration period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingLossCarryforwardsExpirationYear" xlink:to="mtx_OperatingLossCarryforwardsExpirationYear_lbl2" xlink:title="label: OperatingLossCarryforwardsExpirationYear to mtx_OperatingLossCarryforwardsExpirationYear_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" xlink:label="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" xlink:title="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" />
    <link:label xlink:type="resource" xlink:label="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl" xml:lang="en-US" id="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl">Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to Foreign Derived Intangible Income (FDII) by the Tax Cuts and Jobs Act of 2017.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" xlink:to="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl" xlink:title="label: EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent to mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl1" xml:lang="en-US" id="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl1">Effective Income Tax Rate Reconciliation, Foreign Derived Intangible Income, Percent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" xlink:to="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl1" xlink:title="label: EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent to mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl2" xml:lang="en-US" id="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl2">Foreign Derived Intangible Income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" xlink:to="mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl2" xlink:title="label: EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent to mtx_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_IncreasesRelatedToNewJudgments" xlink:label="IncreasesRelatedToNewJudgments" xlink:title="IncreasesRelatedToNewJudgments" />
    <link:label xlink:type="resource" xlink:label="mtx_IncreasesRelatedToNewJudgments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_IncreasesRelatedToNewJudgments_lbl" xml:lang="en-US" id="mtx_IncreasesRelatedToNewJudgments_lbl">The gross amount of increases in unrecognized tax benefits resulting from new judgments by taxing authorities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreasesRelatedToNewJudgments" xlink:to="mtx_IncreasesRelatedToNewJudgments_lbl" xlink:title="label: IncreasesRelatedToNewJudgments to mtx_IncreasesRelatedToNewJudgments_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_IncreasesRelatedToNewJudgments_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_IncreasesRelatedToNewJudgments_lbl1" xml:lang="en-US" id="mtx_IncreasesRelatedToNewJudgments_lbl1">Increases related to new judgments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreasesRelatedToNewJudgments" xlink:to="mtx_IncreasesRelatedToNewJudgments_lbl1" xlink:title="label: IncreasesRelatedToNewJudgments to mtx_IncreasesRelatedToNewJudgments_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_IndefiniteLivedTaxLossCarryForwardsMember" xlink:label="IndefiniteLivedTaxLossCarryForwardsMember" xlink:title="IndefiniteLivedTaxLossCarryForwardsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl" xml:lang="en-US" id="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl">Tax loss carry forwards that do not expire.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IndefiniteLivedTaxLossCarryForwardsMember" xlink:to="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl" xlink:title="label: IndefiniteLivedTaxLossCarryForwardsMember to mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl1" xml:lang="en-US" id="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl1">Indefinite lived tax loss carry forwards [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IndefiniteLivedTaxLossCarryForwardsMember" xlink:to="mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl1" xlink:title="label: IndefiniteLivedTaxLossCarryForwardsMember to mtx_IndefiniteLivedTaxLossCarryForwardsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FiniteLivedTaxLossCarryForwardsMember" xlink:label="FiniteLivedTaxLossCarryForwardsMember" xlink:title="FiniteLivedTaxLossCarryForwardsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl" xml:lang="en-US" id="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl">Tax loss carry forwards with a limited time period before expiration.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedTaxLossCarryForwardsMember" xlink:to="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl" xlink:title="label: FiniteLivedTaxLossCarryForwardsMember to mtx_FiniteLivedTaxLossCarryForwardsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl1" xml:lang="en-US" id="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl1">Finite lived tax loss carry forwards [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedTaxLossCarryForwardsMember" xlink:to="mtx_FiniteLivedTaxLossCarryForwardsMember_lbl1" xlink:title="label: FiniteLivedTaxLossCarryForwardsMember to mtx_FiniteLivedTaxLossCarryForwardsMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AssetRetirementObligationOtherCostAndExpense" xlink:label="AssetRetirementObligationOtherCostAndExpense" xlink:title="AssetRetirementObligationOtherCostAndExpense" />
    <link:label xlink:type="resource" xlink:label="mtx_AssetRetirementObligationOtherCostAndExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AssetRetirementObligationOtherCostAndExpense_lbl" xml:lang="en-US" id="mtx_AssetRetirementObligationOtherCostAndExpense_lbl">Amount of other cost and expense recognized during the period that is associated with an asset retirement obligation.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationOtherCostAndExpense" xlink:to="mtx_AssetRetirementObligationOtherCostAndExpense_lbl" xlink:title="label: AssetRetirementObligationOtherCostAndExpense to mtx_AssetRetirementObligationOtherCostAndExpense_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AssetRetirementObligationOtherCostAndExpense_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AssetRetirementObligationOtherCostAndExpense_lbl1" xml:lang="en-US" id="mtx_AssetRetirementObligationOtherCostAndExpense_lbl1">Asset Retirement Obligation, Other Cost and Expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationOtherCostAndExpense" xlink:to="mtx_AssetRetirementObligationOtherCostAndExpense_lbl1" xlink:title="label: AssetRetirementObligationOtherCostAndExpense to mtx_AssetRetirementObligationOtherCostAndExpense_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AssetRetirementObligationOtherCostAndExpense_lbl2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="mtx_AssetRetirementObligationOtherCostAndExpense_lbl2" xml:lang="en-US" id="mtx_AssetRetirementObligationOtherCostAndExpense_lbl2">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetRetirementObligationOtherCostAndExpense" xlink:to="mtx_AssetRetirementObligationOtherCostAndExpense_lbl2" xlink:title="label: AssetRetirementObligationOtherCostAndExpense to mtx_AssetRetirementObligationOtherCostAndExpense_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_TotalInternationalMember" xlink:label="TotalInternationalMember" xlink:title="TotalInternationalMember" />
    <link:label xlink:type="resource" xlink:label="mtx_TotalInternationalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_TotalInternationalMember_lbl" xml:lang="en-US" id="mtx_TotalInternationalMember_lbl">The total of all foreign countries about which segment information is provided by the entity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TotalInternationalMember" xlink:to="mtx_TotalInternationalMember_lbl" xlink:title="label: TotalInternationalMember to mtx_TotalInternationalMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_TotalInternationalMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_TotalInternationalMember_lbl1" xml:lang="en-US" id="mtx_TotalInternationalMember_lbl1">Total International [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="TotalInternationalMember" xlink:to="mtx_TotalInternationalMember_lbl1" xlink:title="label: TotalInternationalMember to mtx_TotalInternationalMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_CanadaLatinAmericaMember" xlink:label="CanadaLatinAmericaMember" xlink:title="CanadaLatinAmericaMember" />
    <link:label xlink:type="resource" xlink:label="mtx_CanadaLatinAmericaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_CanadaLatinAmericaMember_lbl" xml:lang="en-US" id="mtx_CanadaLatinAmericaMember_lbl">A first specified group of foreign countries about which segment information is provided by the entity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CanadaLatinAmericaMember" xlink:to="mtx_CanadaLatinAmericaMember_lbl" xlink:title="label: CanadaLatinAmericaMember to mtx_CanadaLatinAmericaMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_CanadaLatinAmericaMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_CanadaLatinAmericaMember_lbl1" xml:lang="en-US" id="mtx_CanadaLatinAmericaMember_lbl1">Canada/Latin America [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CanadaLatinAmericaMember" xlink:to="mtx_CanadaLatinAmericaMember_lbl1" xlink:title="label: CanadaLatinAmericaMember to mtx_CanadaLatinAmericaMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_CanadaLatinAmericaMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_CanadaLatinAmericaMember_lbl2" xml:lang="en-US" id="mtx_CanadaLatinAmericaMember_lbl2">Canada/Latin America [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CanadaLatinAmericaMember" xlink:to="mtx_CanadaLatinAmericaMember_lbl2" xlink:title="label: CanadaLatinAmericaMember to mtx_CanadaLatinAmericaMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EuropeAfricaMember" xlink:label="EuropeAfricaMember" xlink:title="EuropeAfricaMember" />
    <link:label xlink:type="resource" xlink:label="mtx_EuropeAfricaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EuropeAfricaMember_lbl" xml:lang="en-US" id="mtx_EuropeAfricaMember_lbl">A second specified group of foreign countries about which segment information is provided by the entity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EuropeAfricaMember" xlink:to="mtx_EuropeAfricaMember_lbl" xlink:title="label: EuropeAfricaMember to mtx_EuropeAfricaMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EuropeAfricaMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EuropeAfricaMember_lbl1" xml:lang="en-US" id="mtx_EuropeAfricaMember_lbl1">Europe/Africa [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EuropeAfricaMember" xlink:to="mtx_EuropeAfricaMember_lbl1" xlink:title="label: EuropeAfricaMember to mtx_EuropeAfricaMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_EuropeAfricaMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_EuropeAfricaMember_lbl2" xml:lang="en-US" id="mtx_EuropeAfricaMember_lbl2">Europe/Africa [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EuropeAfricaMember" xlink:to="mtx_EuropeAfricaMember_lbl2" xlink:title="label: EuropeAfricaMember to mtx_EuropeAfricaMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_UnallocatedCorporateExpenses" xlink:label="UnallocatedCorporateExpenses" xlink:title="UnallocatedCorporateExpenses" />
    <link:label xlink:type="resource" xlink:label="mtx_UnallocatedCorporateExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_UnallocatedCorporateExpenses_lbl" xml:lang="en-US" id="mtx_UnallocatedCorporateExpenses_lbl">Amount of corporate headquarter items not allocated to segments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="UnallocatedCorporateExpenses" xlink:to="mtx_UnallocatedCorporateExpenses_lbl" xlink:title="label: UnallocatedCorporateExpenses to mtx_UnallocatedCorporateExpenses_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_UnallocatedCorporateExpenses_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_UnallocatedCorporateExpenses_lbl1" xml:lang="en-US" id="mtx_UnallocatedCorporateExpenses_lbl1">Unallocated corporate expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="UnallocatedCorporateExpenses" xlink:to="mtx_UnallocatedCorporateExpenses_lbl1" xlink:title="label: UnallocatedCorporateExpenses to mtx_UnallocatedCorporateExpenses_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_UnallocatedCorporateExpenses_lbl2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="mtx_UnallocatedCorporateExpenses_lbl2" xml:lang="en-US" id="mtx_UnallocatedCorporateExpenses_lbl2">Unallocated corporate expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="UnallocatedCorporateExpenses" xlink:to="mtx_UnallocatedCorporateExpenses_lbl2" xlink:title="label: UnallocatedCorporateExpenses to mtx_UnallocatedCorporateExpenses_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock" xlink:label="ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock" xlink:title="ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock" />
    <link:label xlink:type="resource" xlink:label="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl" xml:lang="en-US" id="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl">Tabular disclosure of all significant reconciling items in the reconciliation of total profit or loss, assets, and capital expenditures from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, and discontinued operations.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock" xlink:to="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl" xlink:title="label: ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock to mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl1" xml:lang="en-US" id="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl1">Reconciliation of the Total Reported from Segments to Consolidated [Table Text Block]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock" xlink:to="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl1" xlink:title="label: ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock to mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl2" xml:lang="en-US" id="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl2">Reconciliation of Operating Income Before Income Taxes, Assets, and Capital Expenditures from Segments to Consolidated</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock" xlink:to="mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl2" xlink:title="label: ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock to mtx_ReconciliationOfTheTotalReportedFromSegmentsToConsolidatedTableTextBlock_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FiniteLivedIntangibleAssetsAbstract" xlink:label="FiniteLivedIntangibleAssetsAbstract" xlink:title="FiniteLivedIntangibleAssetsAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_FiniteLivedIntangibleAssetsAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FiniteLivedIntangibleAssetsAbstract_lbl1" xml:lang="en-US" id="mtx_FiniteLivedIntangibleAssetsAbstract_lbl1">Finite-Lived Intangible Assets [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAbstract" xlink:to="mtx_FiniteLivedIntangibleAssetsAbstract_lbl1" xlink:title="label: FiniteLivedIntangibleAssetsAbstract to mtx_FiniteLivedIntangibleAssetsAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FiniteLivedIntangibleAssetsAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FiniteLivedIntangibleAssetsAbstract_lbl2" xml:lang="en-US" id="mtx_FiniteLivedIntangibleAssetsAbstract_lbl2">Finite-Lived Intangible Assets [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FiniteLivedIntangibleAssetsAbstract" xlink:to="mtx_FiniteLivedIntangibleAssetsAbstract_lbl2" xlink:title="label: FiniteLivedIntangibleAssetsAbstract to mtx_FiniteLivedIntangibleAssetsAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_PatentsAndTrademarksMember" xlink:label="PatentsAndTrademarksMember" xlink:title="PatentsAndTrademarksMember" />
    <link:label xlink:type="resource" xlink:label="mtx_PatentsAndTrademarksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_PatentsAndTrademarksMember_lbl" xml:lang="en-US" id="mtx_PatentsAndTrademarksMember_lbl">Exclusive legal right granted by the government to the owner of the patent to exploit an invention or a process for a period of time specified by law and Rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PatentsAndTrademarksMember" xlink:to="mtx_PatentsAndTrademarksMember_lbl" xlink:title="label: PatentsAndTrademarksMember to mtx_PatentsAndTrademarksMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_PatentsAndTrademarksMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_PatentsAndTrademarksMember_lbl1" xml:lang="en-US" id="mtx_PatentsAndTrademarksMember_lbl1">Patents and Trademarks [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PatentsAndTrademarksMember" xlink:to="mtx_PatentsAndTrademarksMember_lbl1" xlink:title="label: PatentsAndTrademarksMember to mtx_PatentsAndTrademarksMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ChangeInGoodwillRelatingToAbstract" xlink:label="ChangeInGoodwillRelatingToAbstract" xlink:title="ChangeInGoodwillRelatingToAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_ChangeInGoodwillRelatingToAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ChangeInGoodwillRelatingToAbstract_lbl1" xml:lang="en-US" id="mtx_ChangeInGoodwillRelatingToAbstract_lbl1">Change in goodwill relating to [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ChangeInGoodwillRelatingToAbstract" xlink:to="mtx_ChangeInGoodwillRelatingToAbstract_lbl1" xlink:title="label: ChangeInGoodwillRelatingToAbstract to mtx_ChangeInGoodwillRelatingToAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_SilicaCasesMember" xlink:label="SilicaCasesMember" xlink:title="SilicaCasesMember" />
    <link:label xlink:type="resource" xlink:label="mtx_SilicaCasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_SilicaCasesMember_lbl" xml:lang="en-US" id="mtx_SilicaCasesMember_lbl">The risk of loss arises with respect to exposure to silica containing materials which actually or allegedly resulted in damages suffered by the injured party.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SilicaCasesMember" xlink:to="mtx_SilicaCasesMember_lbl" xlink:title="label: SilicaCasesMember to mtx_SilicaCasesMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_SilicaCasesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_SilicaCasesMember_lbl1" xml:lang="en-US" id="mtx_SilicaCasesMember_lbl1">Silica Cases [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SilicaCasesMember" xlink:to="mtx_SilicaCasesMember_lbl1" xlink:title="label: SilicaCasesMember to mtx_SilicaCasesMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember" xlink:label="AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember" xlink:title="AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember" />
    <link:label xlink:type="resource" xlink:label="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl" xml:lang="en-US" id="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl">The administrative consent order which requires the installation of a groundwater contamination system at a specific site owned and/or operated by the entity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember" xlink:to="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl" xlink:title="label: AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember to mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl1" xml:lang="en-US" id="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl1">Administrative Consent Order For Installation of Groundwater Contamination System [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember" xlink:to="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl1" xlink:title="label: AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember to mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl2" xml:lang="en-US" id="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl2">Administrative Consent Order for Installation of Groundwater Contamination System [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember" xlink:to="mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl2" xlink:title="label: AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember to mtx_AdministrativeConsentOrderForInstallationOfGroundwaterContaminationSystemMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember" xlink:label="AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember" xlink:title="AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember" />
    <link:label xlink:type="resource" xlink:label="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl" xml:lang="en-US" id="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl">The administrative consent order which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls (PCBs) at a specific site owned and/or operated by the entity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember" xlink:to="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl" xlink:title="label: AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember to mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl1" xml:lang="en-US" id="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl1">Administrative Consent Order For Contamination Associated with Historic Use of PCBs [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember" xlink:to="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl1" xlink:title="label: AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember to mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl2" xml:lang="en-US" id="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl2">Administrative Consent Order for Contamination Associated with Historic Use of PCBs [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember" xlink:to="mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl2" xlink:title="label: AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember to mtx_AdministrativeConsentOrderForContaminationAssociatedWithHistoricUseOfPcbsMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AsbestosCasesMember" xlink:label="AsbestosCasesMember" xlink:title="AsbestosCasesMember" />
    <link:label xlink:type="resource" xlink:label="mtx_AsbestosCasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AsbestosCasesMember_lbl" xml:lang="en-US" id="mtx_AsbestosCasesMember_lbl">The risk of loss arises with respect to exposure to asbestos containing materials which actually or allegedly resulted in damages suffered by the injured party.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AsbestosCasesMember" xlink:to="mtx_AsbestosCasesMember_lbl" xlink:title="label: AsbestosCasesMember to mtx_AsbestosCasesMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AsbestosCasesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AsbestosCasesMember_lbl1" xml:lang="en-US" id="mtx_AsbestosCasesMember_lbl1">Asbestos Cases [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AsbestosCasesMember" xlink:to="mtx_AsbestosCasesMember_lbl1" xlink:title="label: AsbestosCasesMember to mtx_AsbestosCasesMember_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AmcolInternationalCorporationMember" xlink:label="AmcolInternationalCorporationMember" xlink:title="AmcolInternationalCorporationMember" />
    <link:label xlink:type="resource" xlink:label="mtx_AmcolInternationalCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AmcolInternationalCorporationMember_lbl" xml:lang="en-US" id="mtx_AmcolInternationalCorporationMember_lbl">Represents the aggregation and reporting of combined amounts of individually immaterial business combinations that were completed during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmcolInternationalCorporationMember" xlink:to="mtx_AmcolInternationalCorporationMember_lbl" xlink:title="label: AmcolInternationalCorporationMember to mtx_AmcolInternationalCorporationMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AmcolInternationalCorporationMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AmcolInternationalCorporationMember_lbl1" xml:lang="en-US" id="mtx_AmcolInternationalCorporationMember_lbl1">AMCOL International Corporation [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmcolInternationalCorporationMember" xlink:to="mtx_AmcolInternationalCorporationMember_lbl1" xlink:title="label: AmcolInternationalCorporationMember to mtx_AmcolInternationalCorporationMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AmcolInternationalCorporationMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_AmcolInternationalCorporationMember_lbl2" xml:lang="en-US" id="mtx_AmcolInternationalCorporationMember_lbl2">AMCOL International Corporation [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmcolInternationalCorporationMember" xlink:to="mtx_AmcolInternationalCorporationMember_lbl2" xlink:title="label: AmcolInternationalCorporationMember to mtx_AmcolInternationalCorporationMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NumberOfCasesWithNoAllegedExposureDate" xlink:label="NumberOfCasesWithNoAllegedExposureDate" xlink:title="NumberOfCasesWithNoAllegedExposureDate" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl" xml:lang="en-US" id="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl">Refers to number of cases which no period of alleged exposure by the plaintiffs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfCasesWithNoAllegedExposureDate" xlink:to="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl" xlink:title="label: NumberOfCasesWithNoAllegedExposureDate to mtx_NumberOfCasesWithNoAllegedExposureDate_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl1" xml:lang="en-US" id="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl1">Number of cases with no alleged exposure date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfCasesWithNoAllegedExposureDate" xlink:to="mtx_NumberOfCasesWithNoAllegedExposureDate_lbl1" xlink:title="label: NumberOfCasesWithNoAllegedExposureDate to mtx_NumberOfCasesWithNoAllegedExposureDate_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_LossContingencyClaimsDismissedCumulativeNumber" xlink:label="LossContingencyClaimsDismissedCumulativeNumber" xlink:title="LossContingencyClaimsDismissedCumulativeNumber" />
    <link:label xlink:type="resource" xlink:label="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl" xml:lang="en-US" id="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl">Cumulative number of claims dismissed.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyClaimsDismissedCumulativeNumber" xlink:to="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl" xlink:title="label: LossContingencyClaimsDismissedCumulativeNumber to mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl1" xml:lang="en-US" id="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl1">Loss Contingency, Claims Dismissed, Cumulative Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyClaimsDismissedCumulativeNumber" xlink:to="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl1" xlink:title="label: LossContingencyClaimsDismissedCumulativeNumber to mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl2" xml:lang="en-US" id="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl2">Cumulative number of cases dismissed</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LossContingencyClaimsDismissedCumulativeNumber" xlink:to="mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl2" xlink:title="label: LossContingencyClaimsDismissedCumulativeNumber to mtx_LossContingencyClaimsDismissedCumulativeNumber_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NumberOfAllegeLiability" xlink:label="NumberOfAllegeLiability" xlink:title="NumberOfAllegeLiability" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfAllegeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NumberOfAllegeLiability_lbl" xml:lang="en-US" id="mtx_NumberOfAllegeLiability_lbl">Refers to number of allege liability during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfAllegeLiability" xlink:to="mtx_NumberOfAllegeLiability_lbl" xlink:title="label: NumberOfAllegeLiability to mtx_NumberOfAllegeLiability_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfAllegeLiability_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NumberOfAllegeLiability_lbl1" xml:lang="en-US" id="mtx_NumberOfAllegeLiability_lbl1">Number of Allege Liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfAllegeLiability" xlink:to="mtx_NumberOfAllegeLiability_lbl1" xlink:title="label: NumberOfAllegeLiability to mtx_NumberOfAllegeLiability_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfAllegeLiability_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_NumberOfAllegeLiability_lbl2" xml:lang="en-US" id="mtx_NumberOfAllegeLiability_lbl2">Number of allege liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfAllegeLiability" xlink:to="mtx_NumberOfAllegeLiability_lbl2" xlink:title="label: NumberOfAllegeLiability to mtx_NumberOfAllegeLiability_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NumberOfCasesClaimLiability" xlink:label="NumberOfCasesClaimLiability" xlink:title="NumberOfCasesClaimLiability" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfCasesClaimLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NumberOfCasesClaimLiability_lbl" xml:lang="en-US" id="mtx_NumberOfCasesClaimLiability_lbl">Refers to number of cases claim liability during the period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfCasesClaimLiability" xlink:to="mtx_NumberOfCasesClaimLiability_lbl" xlink:title="label: NumberOfCasesClaimLiability to mtx_NumberOfCasesClaimLiability_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfCasesClaimLiability_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NumberOfCasesClaimLiability_lbl1" xml:lang="en-US" id="mtx_NumberOfCasesClaimLiability_lbl1">Number of Cases Claim Liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfCasesClaimLiability" xlink:to="mtx_NumberOfCasesClaimLiability_lbl1" xlink:title="label: NumberOfCasesClaimLiability to mtx_NumberOfCasesClaimLiability_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfCasesClaimLiability_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_NumberOfCasesClaimLiability_lbl2" xml:lang="en-US" id="mtx_NumberOfCasesClaimLiability_lbl2">Number of cases claim liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfCasesClaimLiability" xlink:to="mtx_NumberOfCasesClaimLiability_lbl2" xlink:title="label: NumberOfCasesClaimLiability to mtx_NumberOfCasesClaimLiability_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ConsentDecreeSettlement" xlink:label="ConsentDecreeSettlement" xlink:title="ConsentDecreeSettlement" />
    <link:label xlink:type="resource" xlink:label="mtx_ConsentDecreeSettlement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ConsentDecreeSettlement_lbl" xml:lang="en-US" id="mtx_ConsentDecreeSettlement_lbl">Refers to the settlement amount received from US government against consent decree.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ConsentDecreeSettlement" xlink:to="mtx_ConsentDecreeSettlement_lbl" xlink:title="label: ConsentDecreeSettlement to mtx_ConsentDecreeSettlement_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ConsentDecreeSettlement_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ConsentDecreeSettlement_lbl1" xml:lang="en-US" id="mtx_ConsentDecreeSettlement_lbl1">Consent Decree Settlement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ConsentDecreeSettlement" xlink:to="mtx_ConsentDecreeSettlement_lbl1" xlink:title="label: ConsentDecreeSettlement to mtx_ConsentDecreeSettlement_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ConsentDecreeSettlement_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_ConsentDecreeSettlement_lbl2" xml:lang="en-US" id="mtx_ConsentDecreeSettlement_lbl2">Consent decree paid by US government</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ConsentDecreeSettlement" xlink:to="mtx_ConsentDecreeSettlement_lbl2" xlink:title="label: ConsentDecreeSettlement to mtx_ConsentDecreeSettlement_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange" xlink:label="EstimatedCostOfWastewaterTreatmentUpgradesLowerRange" xlink:title="EstimatedCostOfWastewaterTreatmentUpgradesLowerRange" />
    <link:label xlink:type="resource" xlink:label="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl" xml:lang="en-US" id="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl">Low-end of the range estimate of the cost of wastewater treatment facilities upgrade at the entity's Adams, Massachusetts plant.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EstimatedCostOfWastewaterTreatmentUpgradesLowerRange" xlink:to="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl" xlink:title="label: EstimatedCostOfWastewaterTreatmentUpgradesLowerRange to mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl1" xml:lang="en-US" id="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl1">Estimated cost of wastewater treatment upgrades, lower range</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EstimatedCostOfWastewaterTreatmentUpgradesLowerRange" xlink:to="mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl1" xlink:title="label: EstimatedCostOfWastewaterTreatmentUpgradesLowerRange to mtx_EstimatedCostOfWastewaterTreatmentUpgradesLowerRange_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange" xlink:label="EstimatedCostOfWastewaterTreatmentUpgradesUpperRange" xlink:title="EstimatedCostOfWastewaterTreatmentUpgradesUpperRange" />
    <link:label xlink:type="resource" xlink:label="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl" xml:lang="en-US" id="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl">High-end of the range estimate of the cost of wastewater treatment facilities upgrade at the entity's Adams, Massachusetts plant.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EstimatedCostOfWastewaterTreatmentUpgradesUpperRange" xlink:to="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl" xlink:title="label: EstimatedCostOfWastewaterTreatmentUpgradesUpperRange to mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl1" xml:lang="en-US" id="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl1">Estimated cost of wastewater treatment upgrades, upper range</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EstimatedCostOfWastewaterTreatmentUpgradesUpperRange" xlink:to="mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl1" xlink:title="label: EstimatedCostOfWastewaterTreatmentUpgradesUpperRange to mtx_EstimatedCostOfWastewaterTreatmentUpgradesUpperRange_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO" xlink:label="NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO" xlink:title="NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl" xml:lang="en-US" id="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl">Number of remaining non-AMCOL cases where alleged exposure is after Company's IPO.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO" xlink:to="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl" xlink:title="label: NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO to mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl1" xml:lang="en-US" id="mtx_NumberOfRemainingNonAMCOLCasesWhereAllegedExposureIsAfterCompanySIPO_lbl1">Number of remaining non-AMCOL cases where alleged exposure is after Company's IPO</link:label>
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax" xlink:label="AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax" xlink:title="AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectTax" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FairValueOfPlanAssetsByGeographicLocationTableTextBlock" xlink:label="FairValueOfPlanAssetsByGeographicLocationTableTextBlock" xlink:title="FairValueOfPlanAssetsByGeographicLocationTableTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AmountsRecognizedInAccumulatedOtherComprehensiveIncomeTableTextBlock" xlink:label="AmountsRecognizedInAccumulatedOtherComprehensiveIncomeTableTextBlock" xlink:title="AmountsRecognizedInAccumulatedOtherComprehensiveIncomeTableTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_InterestRateSwapAssetsFairValueDisclosure" xlink:label="InterestRateSwapAssetsFairValueDisclosure" xlink:title="InterestRateSwapAssetsFairValueDisclosure" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_SupplementaryPensionPlanAssetFairValueDisclosure" xlink:label="SupplementaryPensionPlanAssetFairValueDisclosure" xlink:title="SupplementaryPensionPlanAssetFairValueDisclosure" />
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    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DeferredCompensationPlanAssetFairValueDisclosure" xlink:label="DeferredCompensationPlanAssetFairValueDisclosure" xlink:title="DeferredCompensationPlanAssetFairValueDisclosure" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DeferredCompensationPlanAssetFairValueDisclosure" xlink:to="mtx_DeferredCompensationPlanAssetFairValueDisclosure_lbl2" xlink:title="label: DeferredCompensationPlanAssetFairValueDisclosure to mtx_DeferredCompensationPlanAssetFairValueDisclosure_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl" xml:lang="en-US" id="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl">Amount of foreign currency translation gain (loss) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss" xlink:to="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl" xlink:title="label: FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss to mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl1" xml:lang="en-US" id="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Foreign Currency Translation Gain (Loss)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss" xlink:to="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl1" xlink:title="label: FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss to mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl2" xml:lang="en-US" id="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl2">Foreign exchange impact</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss" xlink:to="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl2" xlink:title="label: FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss to mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationGainLoss_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FairValueTransfersAbstract" xlink:label="FairValueTransfersAbstract" xlink:title="FairValueTransfersAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueTransfersAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FairValueTransfersAbstract_lbl1" xml:lang="en-US" id="mtx_FairValueTransfersAbstract_lbl1">Fair Value Transfers [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueTransfersAbstract" xlink:to="mtx_FairValueTransfersAbstract_lbl1" xlink:title="label: FairValueTransfersAbstract to mtx_FairValueTransfersAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FairValueAssetsLevel3TransfersInAmount" xlink:label="FairValueAssetsLevel3TransfersInAmount" xlink:title="FairValueAssetsLevel3TransfersInAmount" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueAssetsLevel3TransfersInAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FairValueAssetsLevel3TransfersInAmount_lbl" xml:lang="en-US" id="mtx_FairValueAssetsLevel3TransfersInAmount_lbl">Amount of transfers of assets measured on a recurring basis into Level 3.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueAssetsLevel3TransfersInAmount" xlink:to="mtx_FairValueAssetsLevel3TransfersInAmount_lbl" xlink:title="label: FairValueAssetsLevel3TransfersInAmount to mtx_FairValueAssetsLevel3TransfersInAmount_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueAssetsLevel3TransfersInAmount_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FairValueAssetsLevel3TransfersInAmount_lbl1" xml:lang="en-US" id="mtx_FairValueAssetsLevel3TransfersInAmount_lbl1">Fair Value, Assets, Level 3 Transfers in , Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueAssetsLevel3TransfersInAmount" xlink:to="mtx_FairValueAssetsLevel3TransfersInAmount_lbl1" xlink:title="label: FairValueAssetsLevel3TransfersInAmount to mtx_FairValueAssetsLevel3TransfersInAmount_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueAssetsLevel3TransfersInAmount_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FairValueAssetsLevel3TransfersInAmount_lbl2" xml:lang="en-US" id="mtx_FairValueAssetsLevel3TransfersInAmount_lbl2">Fair value, assets, Level 3 transfers in, amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueAssetsLevel3TransfersInAmount" xlink:to="mtx_FairValueAssetsLevel3TransfersInAmount_lbl2" xlink:title="label: FairValueAssetsLevel3TransfersInAmount to mtx_FairValueAssetsLevel3TransfersInAmount_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss" xlink:label="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss" xlink:title="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl" xml:lang="en-US" id="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl">Amount of actual return (loss) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss" xlink:to="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl" xlink:title="label: FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss to mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl1" xml:lang="en-US" id="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Actual Return (Loss)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss" xlink:to="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl1" xlink:title="label: FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss to mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl2" xml:lang="en-US" id="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl2">Actual return on plan assets still held at reporting date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss" xlink:to="mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl2" xlink:title="label: FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss to mtx_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetActualReturnLoss_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FairValueAssetsLevel3TransfersOutAmount" xlink:label="FairValueAssetsLevel3TransfersOutAmount" xlink:title="FairValueAssetsLevel3TransfersOutAmount" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl" xml:lang="en-US" id="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl">Amount of transfers of assets measured on a recurring basis out of Level 3.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueAssetsLevel3TransfersOutAmount" xlink:to="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl" xlink:title="label: FairValueAssetsLevel3TransfersOutAmount to mtx_FairValueAssetsLevel3TransfersOutAmount_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl1" xml:lang="en-US" id="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl1">Fair Value, Assets, Level 3 Transfers out , Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueAssetsLevel3TransfersOutAmount" xlink:to="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl1" xlink:title="label: FairValueAssetsLevel3TransfersOutAmount to mtx_FairValueAssetsLevel3TransfersOutAmount_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl2" xml:lang="en-US" id="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl2">Fair value, assets, Level 3 transfers out, amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FairValueAssetsLevel3TransfersOutAmount" xlink:to="mtx_FairValueAssetsLevel3TransfersOutAmount_lbl2" xlink:title="label: FairValueAssetsLevel3TransfersOutAmount to mtx_FairValueAssetsLevel3TransfersOutAmount_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_OtherAssetsAndDeferredChargesMember" xlink:label="OtherAssetsAndDeferredChargesMember" xlink:title="OtherAssetsAndDeferredChargesMember" />
    <link:label xlink:type="resource" xlink:label="mtx_OtherAssetsAndDeferredChargesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_OtherAssetsAndDeferredChargesMember_lbl" xml:lang="en-US" id="mtx_OtherAssetsAndDeferredChargesMember_lbl">Primary financial statement caption encompassing other assets and deferred charges.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherAssetsAndDeferredChargesMember" xlink:to="mtx_OtherAssetsAndDeferredChargesMember_lbl" xlink:title="label: OtherAssetsAndDeferredChargesMember to mtx_OtherAssetsAndDeferredChargesMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_OtherAssetsAndDeferredChargesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_OtherAssetsAndDeferredChargesMember_lbl1" xml:lang="en-US" id="mtx_OtherAssetsAndDeferredChargesMember_lbl1">Other Assets And Deferred Charges [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherAssetsAndDeferredChargesMember" xlink:to="mtx_OtherAssetsAndDeferredChargesMember_lbl1" xlink:title="label: OtherAssetsAndDeferredChargesMember to mtx_OtherAssetsAndDeferredChargesMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_OtherAssetsAndDeferredChargesMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_OtherAssetsAndDeferredChargesMember_lbl2" xml:lang="en-US" id="mtx_OtherAssetsAndDeferredChargesMember_lbl2">Other Assets and Deferred Charges [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherAssetsAndDeferredChargesMember" xlink:to="mtx_OtherAssetsAndDeferredChargesMember_lbl2" xlink:title="label: OtherAssetsAndDeferredChargesMember to mtx_OtherAssetsAndDeferredChargesMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans" xlink:label="MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans" xlink:title="MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans" />
    <link:label xlink:type="resource" xlink:label="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl" xml:lang="en-US" id="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl">Represents the maximum percentage of total benefit obligation for international pension plans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans" xlink:to="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl" xlink:title="label: MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans to mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl1" xml:lang="en-US" id="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl1">Maximum Percentage Of Total Benefit Obligation For International Pension Plans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans" xlink:to="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl1" xlink:title="label: MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans to mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl2" xml:lang="en-US" id="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl2">Maximum percentage of total benefit obligation for international pension plans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans" xlink:to="mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl2" xlink:title="label: MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans to mtx_MaximumPercentageOfTotalBenefitObligationForInternationalPensionPlans_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_EmployeeVestingPeriodForDefinedBenefitPlans" xlink:label="EmployeeVestingPeriodForDefinedBenefitPlans" xlink:title="EmployeeVestingPeriodForDefinedBenefitPlans" />
    <link:label xlink:type="resource" xlink:label="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl" xml:lang="en-US" id="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl">The period of time for which an employee must provide services to the company before becoming vested in the defined benefit plans, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EmployeeVestingPeriodForDefinedBenefitPlans" xlink:to="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl" xlink:title="label: EmployeeVestingPeriodForDefinedBenefitPlans to mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl1" xml:lang="en-US" id="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl1">Employee vesting period for defined benefit plans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EmployeeVestingPeriodForDefinedBenefitPlans" xlink:to="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl1" xlink:title="label: EmployeeVestingPeriodForDefinedBenefitPlans to mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl2" xml:lang="en-US" id="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl2">Employee vesting period for defined benefit plans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EmployeeVestingPeriodForDefinedBenefitPlans" xlink:to="mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl2" xlink:title="label: EmployeeVestingPeriodForDefinedBenefitPlans to mtx_EmployeeVestingPeriodForDefinedBenefitPlans_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DefinedBenefitPlanOther" xlink:label="DefinedBenefitPlanOther" xlink:title="DefinedBenefitPlanOther" />
    <link:label xlink:type="resource" xlink:label="mtx_DefinedBenefitPlanOther_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DefinedBenefitPlanOther_lbl" xml:lang="en-US" id="mtx_DefinedBenefitPlanOther_lbl">The amount of increase or decrease in the benefit obligation attributed to other changes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DefinedBenefitPlanOther" xlink:to="mtx_DefinedBenefitPlanOther_lbl" xlink:title="label: DefinedBenefitPlanOther to mtx_DefinedBenefitPlanOther_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DefinedBenefitPlanOther_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DefinedBenefitPlanOther_lbl1" xml:lang="en-US" id="mtx_DefinedBenefitPlanOther_lbl1">Defined Benefit Plan, Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DefinedBenefitPlanOther" xlink:to="mtx_DefinedBenefitPlanOther_lbl1" xlink:title="label: DefinedBenefitPlanOther to mtx_DefinedBenefitPlanOther_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_DefinedBenefitPlanOther_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_DefinedBenefitPlanOther_lbl2" xml:lang="en-US" id="mtx_DefinedBenefitPlanOther_lbl2">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DefinedBenefitPlanOther" xlink:to="mtx_DefinedBenefitPlanOther_lbl2" xlink:title="label: DefinedBenefitPlanOther to mtx_DefinedBenefitPlanOther_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_AverageRateOfReturnOnAssets" xlink:label="AverageRateOfReturnOnAssets" xlink:title="AverageRateOfReturnOnAssets" />
    <link:label xlink:type="resource" xlink:label="mtx_AverageRateOfReturnOnAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_AverageRateOfReturnOnAssets_lbl" xml:lang="en-US" id="mtx_AverageRateOfReturnOnAssets_lbl">The weighted average return on plan assets calculated based on the average number of years specified.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AverageRateOfReturnOnAssets" xlink:to="mtx_AverageRateOfReturnOnAssets_lbl" xlink:title="label: AverageRateOfReturnOnAssets to mtx_AverageRateOfReturnOnAssets_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_AverageRateOfReturnOnAssets_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_AverageRateOfReturnOnAssets_lbl1" xml:lang="en-US" id="mtx_AverageRateOfReturnOnAssets_lbl1">Average rate of return on assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AverageRateOfReturnOnAssets" xlink:to="mtx_AverageRateOfReturnOnAssets_lbl1" xlink:title="label: AverageRateOfReturnOnAssets to mtx_AverageRateOfReturnOnAssets_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_AverageRateOfReturnOnAssets_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_AverageRateOfReturnOnAssets_lbl2" xml:lang="en-US" id="mtx_AverageRateOfReturnOnAssets_lbl2">Average rate of return on assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AverageRateOfReturnOnAssets" xlink:to="mtx_AverageRateOfReturnOnAssets_lbl2" xlink:title="label: AverageRateOfReturnOnAssets to mtx_AverageRateOfReturnOnAssets_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RealEstateAndOtherMember" xlink:label="RealEstateAndOtherMember" xlink:title="RealEstateAndOtherMember" />
    <link:label xlink:type="resource" xlink:label="mtx_RealEstateAndOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_RealEstateAndOtherMember_lbl" xml:lang="en-US" id="mtx_RealEstateAndOtherMember_lbl">Property composed of land and improvements and other components.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RealEstateAndOtherMember" xlink:to="mtx_RealEstateAndOtherMember_lbl" xlink:title="label: RealEstateAndOtherMember to mtx_RealEstateAndOtherMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_RealEstateAndOtherMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RealEstateAndOtherMember_lbl1" xml:lang="en-US" id="mtx_RealEstateAndOtherMember_lbl1">Real Estate and Other [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RealEstateAndOtherMember" xlink:to="mtx_RealEstateAndOtherMember_lbl1" xlink:title="label: RealEstateAndOtherMember to mtx_RealEstateAndOtherMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_RealEstateAndOtherMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_RealEstateAndOtherMember_lbl2" xml:lang="en-US" id="mtx_RealEstateAndOtherMember_lbl2">Real Estate and Other [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RealEstateAndOtherMember" xlink:to="mtx_RealEstateAndOtherMember_lbl2" xlink:title="label: RealEstateAndOtherMember to mtx_RealEstateAndOtherMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_ActualReturnLossOnPensionAssets" xlink:label="ActualReturnLossOnPensionAssets" xlink:title="ActualReturnLossOnPensionAssets" />
    <link:label xlink:type="resource" xlink:label="mtx_ActualReturnLossOnPensionAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_ActualReturnLossOnPensionAssets_lbl" xml:lang="en-US" id="mtx_ActualReturnLossOnPensionAssets_lbl">The percentage difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ActualReturnLossOnPensionAssets" xlink:to="mtx_ActualReturnLossOnPensionAssets_lbl" xlink:title="label: ActualReturnLossOnPensionAssets to mtx_ActualReturnLossOnPensionAssets_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_ActualReturnLossOnPensionAssets_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_ActualReturnLossOnPensionAssets_lbl1" xml:lang="en-US" id="mtx_ActualReturnLossOnPensionAssets_lbl1">Actual return (loss) on pension assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ActualReturnLossOnPensionAssets" xlink:to="mtx_ActualReturnLossOnPensionAssets_lbl1" xlink:title="label: ActualReturnLossOnPensionAssets to mtx_ActualReturnLossOnPensionAssets_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_ActualReturnLossOnPensionAssets_lbl2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:title="mtx_ActualReturnLossOnPensionAssets_lbl2" xml:lang="en-US" id="mtx_ActualReturnLossOnPensionAssets_lbl2">Actual return (loss) on pension assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ActualReturnLossOnPensionAssets" xlink:to="mtx_ActualReturnLossOnPensionAssets_lbl2" xlink:title="label: ActualReturnLossOnPensionAssets to mtx_ActualReturnLossOnPensionAssets_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_FurnitureAndFixturesAndOtherMember" xlink:label="FurnitureAndFixturesAndOtherMember" xlink:title="FurnitureAndFixturesAndOtherMember" />
    <link:label xlink:type="resource" xlink:label="mtx_FurnitureAndFixturesAndOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_FurnitureAndFixturesAndOtherMember_lbl" xml:lang="en-US" id="mtx_FurnitureAndFixturesAndOtherMember_lbl">Long lived, depreciable assets, commonly used in offices and stores and other long-lived, depreciable assets not separately disclosed.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FurnitureAndFixturesAndOtherMember" xlink:to="mtx_FurnitureAndFixturesAndOtherMember_lbl" xlink:title="label: FurnitureAndFixturesAndOtherMember to mtx_FurnitureAndFixturesAndOtherMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_FurnitureAndFixturesAndOtherMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_FurnitureAndFixturesAndOtherMember_lbl1" xml:lang="en-US" id="mtx_FurnitureAndFixturesAndOtherMember_lbl1">Furniture and fixtures and other [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FurnitureAndFixturesAndOtherMember" xlink:to="mtx_FurnitureAndFixturesAndOtherMember_lbl1" xlink:title="label: FurnitureAndFixturesAndOtherMember to mtx_FurnitureAndFixturesAndOtherMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_FurnitureAndFixturesAndOtherMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_FurnitureAndFixturesAndOtherMember_lbl2" xml:lang="en-US" id="mtx_FurnitureAndFixturesAndOtherMember_lbl2">Furniture and Fixtures and Other [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FurnitureAndFixturesAndOtherMember" xlink:to="mtx_FurnitureAndFixturesAndOtherMember_lbl2" xlink:title="label: FurnitureAndFixturesAndOtherMember to mtx_FurnitureAndFixturesAndOtherMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_DepreciationAndDepletionExpense" xlink:label="DepreciationAndDepletionExpense" xlink:title="DepreciationAndDepletionExpense" />
    <link:label xlink:type="resource" xlink:label="mtx_DepreciationAndDepletionExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_DepreciationAndDepletionExpense_lbl" xml:lang="en-US" id="mtx_DepreciationAndDepletionExpense_lbl">The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives and The noncash expense charged against earnings to recognize the consumption of natural resources that are not part of an entity's cost of goods sold.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DepreciationAndDepletionExpense" xlink:to="mtx_DepreciationAndDepletionExpense_lbl" xlink:title="label: DepreciationAndDepletionExpense to mtx_DepreciationAndDepletionExpense_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_DepreciationAndDepletionExpense_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_DepreciationAndDepletionExpense_lbl1" xml:lang="en-US" id="mtx_DepreciationAndDepletionExpense_lbl1">Depreciation and depletion expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DepreciationAndDepletionExpense" xlink:to="mtx_DepreciationAndDepletionExpense_lbl1" xlink:title="label: DepreciationAndDepletionExpense to mtx_DepreciationAndDepletionExpense_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_MineralRightsAndReservesMember" xlink:label="MineralRightsAndReservesMember" xlink:title="MineralRightsAndReservesMember" />
    <link:label xlink:type="resource" xlink:label="mtx_MineralRightsAndReservesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_MineralRightsAndReservesMember_lbl" xml:lang="en-US" id="mtx_MineralRightsAndReservesMember_lbl">Legal right to explore, extract, and retain some or all portions of the benefits from mining or mineral deposits and properties used for mining and reserves.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MineralRightsAndReservesMember" xlink:to="mtx_MineralRightsAndReservesMember_lbl" xlink:title="label: MineralRightsAndReservesMember to mtx_MineralRightsAndReservesMember_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_MineralRightsAndReservesMember_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_MineralRightsAndReservesMember_lbl1" xml:lang="en-US" id="mtx_MineralRightsAndReservesMember_lbl1">Mineral rights and reserves [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MineralRightsAndReservesMember" xlink:to="mtx_MineralRightsAndReservesMember_lbl1" xlink:title="label: MineralRightsAndReservesMember to mtx_MineralRightsAndReservesMember_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_MineralRightsAndReservesMember_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_MineralRightsAndReservesMember_lbl2" xml:lang="en-US" id="mtx_MineralRightsAndReservesMember_lbl2">Mineral Rights and Reserves [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MineralRightsAndReservesMember" xlink:to="mtx_MineralRightsAndReservesMember_lbl2" xlink:title="label: MineralRightsAndReservesMember to mtx_MineralRightsAndReservesMember_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract" xlink:label="WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract" xlink:title="WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl1" xml:lang="en-US" id="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl1">Weighted Average Remaining Lease Term and Discount Rates [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract" xlink:to="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl1" xlink:title="label: WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract to mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl2" xml:lang="en-US" id="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl2">Weighted Average Remaining Lease Term and Discount Rates [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract" xlink:to="mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl2" xlink:title="label: WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract to mtx_WeightedAverageRemainingLeaseTermAndDiscountRatesAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_RentExpenseAbstract" xlink:label="RentExpenseAbstract" xlink:title="RentExpenseAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_RentExpenseAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_RentExpenseAbstract_lbl1" xml:lang="en-US" id="mtx_RentExpenseAbstract_lbl1">Rent Expense [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RentExpenseAbstract" xlink:to="mtx_RentExpenseAbstract_lbl1" xlink:title="label: RentExpenseAbstract to mtx_RentExpenseAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_RentExpenseAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_RentExpenseAbstract_lbl2" xml:lang="en-US" id="mtx_RentExpenseAbstract_lbl2">Rent Expense [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RentExpenseAbstract" xlink:to="mtx_RentExpenseAbstract_lbl2" xlink:title="label: RentExpenseAbstract to mtx_RentExpenseAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_LesseeOperatingLeaseRemainingLeaseTerm" xlink:label="LesseeOperatingLeaseRemainingLeaseTerm" xlink:title="LesseeOperatingLeaseRemainingLeaseTerm" />
    <link:label xlink:type="resource" xlink:label="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:title="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl" xml:lang="en-US" id="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl">Remaining term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LesseeOperatingLeaseRemainingLeaseTerm" xlink:to="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl" xlink:title="label: LesseeOperatingLeaseRemainingLeaseTerm to mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl" />
    <link:label xlink:type="resource" xlink:label="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl1" xml:lang="en-US" id="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl1">Lessee, Operating Lease, Remaining Lease Term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LesseeOperatingLeaseRemainingLeaseTerm" xlink:to="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl1" xlink:title="label: LesseeOperatingLeaseRemainingLeaseTerm to mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl2" xml:lang="en-US" id="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl2">Remaining lease terms</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="LesseeOperatingLeaseRemainingLeaseTerm" xlink:to="mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl2" xlink:title="label: LesseeOperatingLeaseRemainingLeaseTerm to mtx_LesseeOperatingLeaseRemainingLeaseTerm_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract" xlink:label="SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract" xlink:title="SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract_lbl1" xml:lang="en-US" id="mtx_SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract_lbl1">Supplemental Cash Flow Information and Non-Cash Activity Related to our Operating Leases [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract" xlink:to="mtx_SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract_lbl1" xlink:title="label: SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract to mtx_SupplementalCashFlowInformationAndNonCashActivityRelatedToOurOperatingLeasesAbstract_lbl1" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_OperatingCashFlowsInformationAbstract" xlink:label="OperatingCashFlowsInformationAbstract" xlink:title="OperatingCashFlowsInformationAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingCashFlowsInformationAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_OperatingCashFlowsInformationAbstract_lbl1" xml:lang="en-US" id="mtx_OperatingCashFlowsInformationAbstract_lbl1">Operating Cash Flows Information [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingCashFlowsInformationAbstract" xlink:to="mtx_OperatingCashFlowsInformationAbstract_lbl1" xlink:title="label: OperatingCashFlowsInformationAbstract to mtx_OperatingCashFlowsInformationAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_OperatingCashFlowsInformationAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_OperatingCashFlowsInformationAbstract_lbl2" xml:lang="en-US" id="mtx_OperatingCashFlowsInformationAbstract_lbl2">Operating cash flows information [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OperatingCashFlowsInformationAbstract" xlink:to="mtx_OperatingCashFlowsInformationAbstract_lbl2" xlink:title="label: OperatingCashFlowsInformationAbstract to mtx_OperatingCashFlowsInformationAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_NonCashActivityAbstract" xlink:label="NonCashActivityAbstract" xlink:title="NonCashActivityAbstract" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashActivityAbstract_lbl1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="mtx_NonCashActivityAbstract_lbl1" xml:lang="en-US" id="mtx_NonCashActivityAbstract_lbl1">Non-cash Activity [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashActivityAbstract" xlink:to="mtx_NonCashActivityAbstract_lbl1" xlink:title="label: NonCashActivityAbstract to mtx_NonCashActivityAbstract_lbl1" />
    <link:label xlink:type="resource" xlink:label="mtx_NonCashActivityAbstract_lbl2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="mtx_NonCashActivityAbstract_lbl2" xml:lang="en-US" id="mtx_NonCashActivityAbstract_lbl2">Non-cash activity [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NonCashActivityAbstract" xlink:to="mtx_NonCashActivityAbstract_lbl2" xlink:title="label: NonCashActivityAbstract to mtx_NonCashActivityAbstract_lbl2" />
    <link:loc xlink:type="locator" xlink:href="mtx-20191231.xsd#mtx_LesseeOperatingLeaseAssetsAndLiabilitiesBalanceSheetInformationTableTextBlock" xlink:label="LesseeOperatingLeaseAssetsAndLiabilitiesBalanceSheetInformationTableTextBlock" xlink:title="LesseeOperatingLeaseAssetsAndLiabilitiesBalanceSheetInformationTableTextBlock" />
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