precipitation barium sulfate is produced in advanced chemical precipitation method, good phisycal properties Barium sulfate precipitated performance index precipitation barium sulfate is produced in advanced chemical precipitation method, good phisycal properties ... -4.2fineness: 325-mesh, 400-mesh, 600-mesh, 800-mesh, 1250-mesh, 2000-mesh, 3000-mesh, 6000-mesh 8000-mesh, 12500 ...