... Whiteness 70~95% Water solubles 0.2% max Specification S.G4.2 barite oil drilling grade API 13 Specification: ... 10maxCaO0.15maxSiO20.01maxOil Absorption(g/100g)8.0~10.0Loose bulk density (g/cm3%)1.0~1.4Density (g/cm3%)2.1~ ... 2.7PH value 7.9~8.1 Size: 1) powder : 325 ,400, 1250, 2500, 3000 ... to dissolve, pack the rubber, plastic and oil paint S.G 4.2 barite oil drilling grade API 13