Used in paper, paint, dope, and rubber industries etc. Whiteness: 80-95%min Filler Grade 1. Application:It can play as filling in paper, paint, dope, and rubber industries etc. Also it can be used to extract metals barium. 2. Specification:1) BaSO4: 90-98%min;2) Whiteness: 80-95%min;3) Specific Gravity: 4.0-4.3 g/cc;4) Particle size: 100-325mesh, or lump