Stearates
Item | Premium Grade | First Grade | Qualified |
Appearance | White powder | ||
Zinc content% | 10.3-11.3 | 10.3-11.3 | 10.0-11.5 |
Free acid (stearic acid) %≤ | 0.8 | 1.0 | 1.5 |
Heating loss %≤ | 0.8 | 1.0 | 1.5 |
Melting point ℃ | 120±5 | 120±5 | 120±5 |
Fineness (through test screen)%≥ | 99.0 （0.045mm） | 99.5（0.075mm） | 95.0（0.075mm） |