GB/T 8443-1998 is the test standard for the colour fastness of metal chromium salts in the dyeing bath of Spinning & weaving products. It specifies the relevant test methods in detail, including the preparation of metal chromium salt solution in the dyeing bath, the test process, such as the action time and temperature of Spinning & weaving products and chromium salt solution, and strict result evaluation rules. According to this standard test, the Color Stability of Spinning & weaving products in the dyeing bath environment containing metal chromium salts can be accurately evaluated. It provides a key reference for Spinning & weaving enterprises to control the dyeing mass and optimize the process, and helps to improve product quality and market competitiveness.