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Calcium Carbonate For Paints
Specifications :
| Chemical Properties | |
| CaCO3 % by Weight | 98.25 + 0.25 |
| Lead as pb | 10 ppm Max. |
| Copper as Cu | 2 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 105oC | 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. |
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