GB/T 23979.1-2009 "Fluorescent whitening agents—Determination of whitening power and shade—Dyeing method with cotton fabric" specifies the method for determining these indicators, applicable to fluorescent whitening agents used on cotton fabrics. The standard involves treating cotton fabrics under specific dyeing conditions, measuring the whiteness value of the dyed samples using a qualified whiteness meter to assess the whitening power, and evaluating the shade under the D65 standard light source according to the prescribed method. The detection requires instruments such as a laboratory dyeing machine and a whiteness meter, ensuring consistency in product quality.
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 | 2009-06-02 00:00:00 | Implementation Date | 2010-02-01 00:00:00 |
