The GB/T 44161-2024 standard describes in detail the method for determining the thermal mobility of disperse dyes. The standard is suitable for detecting the migration characteristics of disperse dyes from the inside of the fiber to the surface during dry heat treatment. The determination method includes three main steps: dyeing, heat treatment, and result evaluation. First, the polyester fabric is dyed by high temperature and high voltage method, followed by processing the sample in a dry heat environment of 180 ° C. Finally, the dyestuff mobility is determined by evaluating the degree of staining of the lining fabric or using spectrophotometer measurement of the extraction solution. The standard also specifies the requirements for reagents, equipment and reporting content to ensure the accuracy and Reliability of the test results.