GB/T 8431-1998 is a standard for light-induced discoloration inspection and evaluation of Spinning & weaving products. It specifies the method for detecting whether light-induced discoloration occurs in Spinning & weaving products under light, and clarifies the applicable lighting conditions, test equipment and operation procedures, covering key parameters such as light duration and intensity. At the same time, scientific evaluation criteria are formulated to judge the degree of light-induced discoloration. By following this standard, the light-induced discoloration characteristics of Spinning & weaving products can be accurately identified and evaluated, providing a strong basis for Spinning & weaving companies to control product mass and develop related products, and help products meet the market demand for color stability.