Superfine heavy calcium carbonate

It is white power ,insoluble in water ,dissolvable in acid and widely used in dope  paint  plastic   rubber  pottery  and porcelain ,paper making and ect as the filling materials .

 

item

calcium carbonate (CaCO3) content ………………………………….    ≥ 98%

      

Iron content   (Fe)       …………………………………….. ≤0.1%

 

Muriatic acid insolubles content…………………………….. ≤0.2%

 

Moisture and volatile content ………………………………. ≤0.3%

 

Density  (g/cm3)           ………………………………………≤2.9

 

Mohs hardness       ……………………………………….. ≤3.0

 

Whiteness （degree）          ……………………………………….. ≥94.0

 

Oil absorption  (ml/g)      …………………………………………. 16-25

 

Ph                  ……………………………………….. 8-9

Heavy metal（Pb）%≤…………………………………………0.001