| Appearance |
White slurry |
| Electron microscope under
electron microscope (nm) |
≤ 25 |
| Specific surface area(m2/g)
|
≥ 55 |
| Whiteness(°)
|
≥ 85 |
| Shape of particle |
Cube |
| Acid and base number(PH, 100g/Lsuspension)
|
9.0  10.5 |
| Main content(CaCO3%) |
≥ 94.0 |
| Insoluble substance in hydrochloric acid(%)
|
≤0.40 |
Oil absorption number(gDop/100 g CaCO3) |
60  80 |
| Surface treating agent |
Special treating compound |