... , ceramics, glass, electronics and ect. 2. Specification No.ItemUnitIndex1BaSO4 content%≥982105 °CVolatile content%≤ 0.33Water soluble matter%≤0.24moisture%≤0.155PH Value ... -8.06Oil absorption(according to different size)g/100g10-307Iron(Fe)content%≤0.0038whiteness%92-96Size(mesh):325,400,600,800,1250 ...