GB/T 21868.4-2008 "Pigments and extenders—Methods of dispersion for assessment of dispersion characteristics—Part 4: Dispersion using a sand mill" specifies detailed operational procedures for dispersing pigments using a sand mill, which is suitable for pigments requiring high fineness. It defines parameters such as the type of sand mill media, filling amount, and grinding time, achieving ultra-fine dispersion of pigments through the impact and shearing action of the grinding media. The testing requires instruments such as a sand mill, particle size analyzer, and fineness gauge, providing a method for evaluating the dispersibility of pigments with high precision.
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 | G53 | ICS | 87.060.10 |
| Release Date | 2008-05-14 00:00:00 | Implementation Date | 2008-10-01 00:00:00 |
