Paints & Coatings Paints are the second largest application for calcium carbonate fillers; they are principally used in interior emulsion paints and primers, where the mineral content can be as much as 50% by weight. The precipitated silica is used as matting agent. It is easy to incorporate into varnishes, acrylic lacquers and paints. It provides for High matting efficiency, Good stability, coatings do not show phase separation, High transparency, Excellent dispersion in the systems, Viscosity control. DSI plans producing precipitated calcium carbonate for paint and lacquer materials under the DCC PLM trade name.