The GB/T 8424.3-2001 Calculation of Color Difference for Spinning & Weaving Color Fastness Tests specifies the calculation method for the color difference of Spinning & weaving products to evaluate the color Stability of Spinning & weaving products under test conditions. The standard defines the calculation formula and procedures for color difference, including the use of the International Commission on Illumination (CIE) Color difference formula to quantify the color difference of the sample. The color difference calculation is based on the color value measured by the color difference meter or colorimeter, and the degree of Color change is expressed by the Delta E value. This standard is designed to ensure the color conformity and Stability of Spinning & Weaving products in actual use, and to help manufacturers and consumers evaluate and ensure the color mass of products.