BS EN ISO 638-1:2021

What is ISO 638-1 about?

ISO 638-1 specifies an oven-drying method for the determination of dry matter content in paper, board, pulp and cellulosic nanomaterials in solid form, which all can be produced from virgin and/or recycled materials. ISO 638-1 is used when the dry matter content is needed to calculate the results for chemical analysis or physical testing or to determine the moisture content of paper, board and pulp and cellulosic nanomaterials in solid form. Note 1: ISO 638-1 applies to the determination of the dry matter content of paper and board for recycling Note 2: ISO 638-1 is not applicable to the determination of the dry matter content of slush pulp or to the determination of the saleable mass of pulp lots. Note 3: ISO 638-1 is applicable to paper, board, and pulp and cellulosic nanomaterials which do not contain any appreciable quantities of materials other than water that are volatile at the temperature of 105 °C ± 2 °C.

Who is ISO 638-1 for?

ISO 638-1 on dry matter content for paper, board, pulps and cellulosic nanomaterials is applicable to: