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SEGMENT INFORMATION - Net sales by product (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net sales by products |  |  |
Net sales | R$ 30,460,277 | R$ 26,012,950 | R$ 13,443,376
Market pulp |  |  |
Net sales by products |  |  |
Net sales | R$ 25,578,265 | R$ 21,027,686 | R$ 8,783,274
Fluff pulp |  |  |
Net sales by products |  |  |
Percentage of total net sales | 0.60% | 0.60% | 0.60%
Printing and writing paper |  |  |
Net sales by products |  |  |
Net sales | R$ 3,891,002 | R$ 4,100,502 | R$ 3,834,380
Tissue |  |  |
Net sales by products |  |  |
Percentage of total net sales | 2.60% | 2.60% | 2.60%
Paperboard |  |  |
Net sales by products |  |  |
Net sales | R$ 935,047 | R$ 823,360 | R$ 764,701
Others |  |  |
Net sales by products |  |  |
Net sales | R$ 55,963 | R$ 61,402 | R$ 61,021

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