scope:

This part of ISO 12625 specifies a test method for the volumetric determination of the demand absorbency properties of tissue paper and tissue products upon wetting with water. Specifically it measures the rate and capacity of liquid absorption, without applying a positive external liquid pressure. This part of ISO 12625 has been tested for demand absorption rates of up to 0,35 g/s and a water absorption capacity of 10 grams per gram of paper. During the test, test pieces are placed on a web of fiber strings. This part of ISO 12625 is not applicable to products that hang through the web. It is expressly stated that the direction of impurities and contraries in tissue paper and tissue products should be applied according to ISO 15755. For the determination of moisture content in tissue paper and tissue products, ISO 287 should be applied.