GB/T 2379-2013 Specifies the determination of the color light and intensity of acid complex dyestuff dyeing. It specifies the fabrics, dye baths and other materials required for the experiment, and specifies the dyeing solution preparation process in detail. In the dyeing operation, the temperature, time, bath ratio and other conditions are strictly controlled. After dyeing is completed, the color light difference is accurately assessed by comparing with the standard sample, and the intensity is determined by instrument measurement combined with visual evaluation. The standard provides a unified detection method for acid complex dyestuff production and use enterprises, helps to control the dyeing mass of the product, ensures the conformity and Stability of the dyestuff dyeing effect, and promotes the standardization operation of the dyestuff industry.