GB/T 39307-2020 "Fluorescent Whitening Agents—Determination of Color and Whiteness—Plastic Coloring Method" is applicable to the determination of color and whiteness of fluorescent whitening agents, using the plastic coloring method to prepare test samples. The whitening agent is mixed with a special PVC resin and injection molded at 185°C under pressure for 5 minutes. After cooling, color plates are obtained. Using a standard sample as a reference, the color is evaluated by visual inspection or a colorimeter, and the whiteness is calculated. The equipment, sample dosage, and test procedures are specified to provide a basis for product quality control.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | G55 | ICS | 71.100.01;87.060.10 |
| Release Date | 2020-11-19 00:00:00 | Implementation Date | 2021-10-01 00:00:00 |