Usage: High quality cigarette paper In the industry of the paper making, the Nano-structured calcium carbonate is replacing the kaolin as the filler material and coating paint alongside with the promotion of neutral/alkaline paper technology. Out GT series of heavy calcium carbonate is usually used as the filling material during paper making to improve the lightness, whiteness, opacity and intensity. NA series, with different particle distributions and crystal shapes(cubic, rhomb, scalenohedron), is able to improve the optic characters and other physical features of paper significantly and used as the coating paint of high standard paper or special paper replacing the expensive titanic white powder.