GB/T 41075-2021 "Fluorescent Whitening Agents—Determination of Migration" is applicable to the determination of the migration of fluorescent whitening agents, specifying the relevant method summary, reagents and materials, instruments and equipment, and determination steps. The whitened fabric and the original white fabric are migrated in a blank dye bath for 30 minutes, and the migration is evaluated in two ways: first, by assessing the color difference level between the two using a gray scale or a colorimeter; second, by measuring the whiteness values of both and calculating the migration degree. The requirements for equipment such as dyeing machines and colorimeters are clearly defined, and specific dyeing and migration conditions must be followed, with results rounded according to the specified rules.
| Status | Active | ||
|---|---|---|---|
| CCS | G55 | ICS | 71.100.01;87.060.10 |
| Release Date | 2021-12-31 00:00:00 | Implementation Date | 2022-07-01 00:00:00 |
