Fe as FeO(OH) % ≥86.0
Water soluble salts % ≤0.5
pH-Value 5~7
Res.on 325 mesh % ≤0.10
Moisture % ≤1.0
Oil absorption ml/100g 25~35
SO4
Shade compared with Std. ΔE★ ≤0.8
Relative tinting strength % 95~105
Bulk density g/ml 0.15
Speciffic gravity g/ml 4.1
Particle size by BET method
Predominant particle size μm 0.1*0.7
Heat-resistant temperature ℃ ≤180 *An original examination method |