Specifies the test method for the color fastness of Spinning & weaving products to light under the action of artificial sweat. The test determines the degree of discoloration of the Spinning & weaving product samples under sweat and light conditions by exposing them to the blue wool master standard at the same time. This standard applies to the color fastness test of various Spinning & weaving products to evaluate their Color Stability in actual use. The test results are used to guide the production and quality control of Spinning & weaving products to ensure their Reliability in the actual environment.