Calcined kaolin, as one of the best extenders for titanium dioxide, is mainly used to extend titanium dioxide
in the system to ensure the full dispersion of titanium dioxide in the system and maximize the covering ability
of titanium dioxide. Meanwhile, kaolin itself can also provide a certain degree of dry covering power.
Its particle size is generally fine as 4000 mesh.
| Calcined Kaolin |
| Parameters | Specifications |
| Appearance | Highly micronized powder |
| GE Brightness (%) | ≥95.0 |
| ISO Brightness (%) | ≥93.5 |
| Particle Size (less than 2µm) | 80±2 |
| pH value (28% suspension) | 5.0-7.0 |
| Specify Gravity (g/cm3) | 2.63 |
| Free Moisture (105°C)(%) | 1.0 max |
| Screen residues (325 mesh%) | 0.01 max. |
| Dispersion (Hegman) | ≥3.5 |