GB/T 7072-1997 focuses on the colour fastness of Spinning & weaving products resistant to sodium chlorate re-bleaching. It specifies in detail the test method for the colour fastness of Spinning & weaving products under this specific bleaching condition, and there are clear specifications from the test preparation, specific operation process, and final result evaluation. Testing according to this standard can accurately evaluate the Color retention performance of Spinning & weaving products during sodium chlorate re-bleaching treatment. It provides a key basis for Spinning & weaving manufacturers to control product mass and optimize processes, and is of great significance to ensuring the quality of Spinning & weaving products.