GB/T 2394-2024 is a national standard for the determination of chromatic light and intensity of disperse dyes, replacing the 2013 version. The standard describes in detail the determination methods for the chromatic light and relative intensity of disperse dyes on different fabrics, including high temperature and high voltage dyeing, hot melt dyeing, printing and diacetate fiber dyeing. Standard samples are used for comparison during the determination process, and the chromatic light and intensity of the samples are evaluated by visual or instrumental measurement. The standard specifies the specific requirements for the required reagents, materials, instruments and equipment, and provides a detailed dyeing and printing process flow. The test report should contain the detailed results of the test and related data. This standard aims to provide a uniform Measuring method for the performance evaluation of disperse dyes.