Complaint
| Property | R1931 |
| TiO2 content % | ≥93.0 |
| Rutile content % | ≥98.0 |
| Color (compared with standard sample) | Not lower than ≥-0.3 ≤0.5 |
| Matter volatile at 105ºC % | ≤0.5 |
| Matter soluble in water % | ≤0.5 |
| Residue on sieve 45µm % | ≤0.05 |
| PH of aqueous suspension | 6.5-8.0 |
| Brightness % | ≥98.0 |
| Oil absorption g/100g | ≤18.0 |
| Tinting strength, Reynolds number | ≥1920 |
