325 mesh, 800 mesh, 1250 mesh, 3000mesh, 6250mesh product by reflotation, ultrafine, grading and calcination.It is of high whiteness, high dispersibility and high hiding power and it is widely used in the industry of paper making, paint, plastic, rubber, ink, 4Azeolite, refractory material, electronic component, glass and petrochemical as a modifier, filling and white series pigment and it can replac titanium pigment.