Heavy (Ground) Calcium Carbonate is widely used as filler and improver. Purity: 98%min. Appearance: white ... your requirement.Heavy (Ground) Calcium Carbonate is widely used as filler and improver in plastic, paint, paper-making, rubber, ... 9Molecular FormulaCaCO3typeheavy, groundApplicationHeavy (Ground) Calcium Carbonate is widely used as filler and improver in plastic, paint, paper-making, rubber, ...