GB/T 23979.2-2009 "Fluorescent whitening agents - Determination of whitening power and shade - Paper staining method" specifies the method for determining the whitening power and shade of fluorescent whitening agents used for paper. It is applicable to all types of fluorescent whitening agents for paper staining. Under specified conditions, the standard involves staining paper, measuring the whiteness value of the paper using a whiteness meter to assess whitening power, and visually evaluating shade differences under a D65 standard light source. The test requires instruments such as a paper staining test device, a whiteness meter, and a standard light source cabinet, providing a unified 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 | 87.060.10;71.100.01 |
| Release Date | 2009-06-02 00:00:00 | Implementation Date | 2010-02-01 00:00:00 |
