GB/T 40920-2021 Leather—Tests for colour fastness—Colour fastness to cycles of to-and-fro rubbing

GB/T 24218.2-2009 Textiles—Test methods for nonwovens—Part 2:Determination of thickness GB 250-1995 Gray scale for assessing change in colour GB/T 250-2008 Textiles—Tests for colour fastness—Grey scale for assessing change in colour GB 251-1995 Gray scale for assessing staining GB/T 251-2008 Textiles—Tests for colour fastness—Grey scale for assessing staining GB/T 6151-1997 Textiles—Tests for colour fastness—General principle of testing GB/T 6151-2016 Textiles—Tests for colour fastness—General principles of testing GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 39364-2020 Leather—Chemical,physical,mechanical and fastness tests—Sampling location QB/T 2464.23-1999 The method for determining the color fastness of leather to perspiration QB/T 2707-2018 QB/T 2707-2018 Leather - Preparation and adjustment of specimens for physical and mechanical tests QB/T 2707-2005 Preparation and adjustment of samples for physical and mechanical tests of leather QB/T 2724-2018 Leather Chemical Test pH Determination QB/T 2724-2005 QB/T 2724-2005 Leather Chemical Test pH Determination

ISO 11640:2018