GB/T 29255-2012 specifies the test method for the colour fastness of Spinning & weaving products to domestic and commercial washing. The standard focuses on the use of phosphorus-free standard detergents containing low-temperature bleaching agents, and specifies the test equipment, detergent formulation and concentration requirements. Detailed washing process, including key parameters such as temperature, time, mechanical stirring strength, etc. The colour fastness grade is assessed by comparing the color change of Spinning & weaving products before and after washing. According to this standard test, the Color Stability of Spinning & weaving products under such washing conditions can be accurately evaluated, which provides an important basis for Spinning & weaving companies to control product mass and meet consumers' needs for washing colour fastness.