This International Standard specifies an oven-drying method for the determination of the dry matter in paper,
board and pulp.
The procedure is applicable to paper, board and pulp which does not contain any appreciable quantities of
materials other than water that are volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the
case of pulp, paper and board samples taken for chemical and physical tests in the laboratory, when a
concurrent determination of dry matter content is required.
This method 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.
BS EN ISO 638:2008 Referenced Document
ISO 186 Paper and board - Sampling to determine average quality
ISO 7213 Pulps — Sampling for testing*， 2021-12-07 Update
BS EN ISO 638:2008 history
2021BS EN ISO 638-1:2021 Paper, board, pulps and cellulosic nanomaterials. Determination of dry matter content by oven-drying method. Materials in solid form
2008BS EN ISO 638:2008 Paper, board and pulps - Determination of dry matter content - Oven-drying method