We are Yen Bai Company, main manufacturer in Calcium Carbonate in Vietnam. Specializing in exploiting, processing and exporting pure Calcium Carbonate (CaCO3) . In which the ultra-fine grinding flour product with particle sizes D50 =1, 5 Micron and D50 = 2 Micron with the capacity of 300. 000 tons / year, which has been replaced for Light Powder, used as additives for Paper industry, Painting industry, Rubber industry, Cosmetics, Aquatic Product Breeding, decorating materials in building. . . ...