Fe2O3:86%min Oil absorption:25-35 Residues through 325mesh:0.3%max Water soluble salt:0.3%max Fe2O3:86%min Oil absorption:25-35 Residues through 325mesh:0.3%max Water soluble salt:0.3%max Moisture:1%max PH value:3-7 Tamped apparent density:0.4-0.6g/cm3 Tinting strength:95-105%