Precipitated Calcium Carbonate is widely used by Paper Industry to manufacture Alkline media paper making. Around 70% of the total output of Precipitated Calcium Carbonate of the world is consumed by Paper Industry alone.

Precipitated Calcium Carbonate improves the Brightness, Smoothness, and Opacity of Paper. It also increases the ink receptivity. Precipitated Calcium Carbonate reduces the cost of production of Papermaking.

Calcium Carbonate Properties
Chemical Properties
CaCO3 % by Weight 98.25 ± 0.25
Lead as pb 10 ppm Max.
Arsenic as As 2 ppm Max.
Sulphate as SO4 0.4% Max.
Soluble alkali as Na2O 0.25% Max.
Silica as SiO2 0.5% Max.
Iron as Fe 250 ppm Max.
Matter insoluble in HCL 0.5% Max.
pH 9.5 ± 0.5
Phosphate 20 ppm Max.
Chloride as Cl 20 ppm Max.
Magnesium as MgO 0.5% Max.
Flouride as F 20 ppm Max.
Physical Properties
Whiteness 95 Min.
Crystal Structure Argonite
Water Absorption 80 to 85 ml/100 gm
Oil Absorption 60 to 65 ml/100 gm
Loss on Drying at 105o C 0.5% Max.
Specific Gravity 2.6 to 2.9
Bulk Density 0.40 to 0.45 gm/ml
Average Particle Size 5 to 7 μm
Residue on 300 mess 0.2% Max.