| Technical specification | Products Special grade | Products First grade |
| Whiteness ％≥ | 90.0 | 88.0 |
| L.O.I. (1000℃) ％ ≤ | 22.0 | 25.00 |
| Moisture％ ≤ | 0.5 | 1.0 |
| PH | 10.0 | |
| Silica and magnesium oxide ％≥ | .77.0 | 60.0 |
| Density g/cm3 ≤ | 3.00 | 3.00 |
| Passing through (45µm) ％≥ | 98.0 | 95.0 |