This standard specifies the determination method of the yellowing point of fluorescent whitening agents, which is applicable to cotton, nylon and paper fluorescent whitening agents. The determination principle is to dye the fluorescent whitening agent on the substrate at a specific depth spacing. When the dyeing depth reaches the highest whiteness value, when the whiteness of the substrate no longer increases with the increase of the dyeing depth, the depth is the yellowing point. The reagents and materials should comply with the relevant standards to ensure the accuracy of the measurement results.
| Status | Active |
|---|---|
| CCS | G55 | ICS | 71.100.01;87.060.10 |
| Release Date | 2018-12-28 00:00:00 | Implementation Date | 2019-11-01 00:00:00 |