... powder 2.used as filling compound for various plastic, natural/synthetic rubber produc Heavy& Ground CaCo3 which can reduce ... effect. Heavy& Ground CaCo3 1.Product Introduction:Natural heavy calcium carbonate selects natural,snow-white calcite as raw material,and ... , ml/g ≥---Top Cut(D98), μm ≤35Average Grain(D50), μm ≤16Fe, % ≤0.1Mn, % ≤0.08Residues: 325μm, % ≤ 125μm, % ≤0 0.6Whiteness(R457), ...