... used as filling compound for various plastic, natural/synthetic rubber produc Heavy& Ground CaCo3 which can reduce cost of the product and ... 94PH(10% Soliquit)8-10105°C Volatitle, % ≤0.3Insoluble substance in hydrochloric acid, % ≤1.0Moisture content, % ≤0.5Bulk density, ... widely used in paper-making,plastic,rubber,paint,building material,etc. Mesh 600 Natural Heavy Calcium Carbonate in rubber industry