Natural Ground Series
Nothing added, nothing hidden — natural ground calcium carbonate from Egyptian limestone at 99.9% purity, with iron and silica held to one part per hundred thousand.
The Purity Case
In paints, paper and construction systems, the filler's chemistry shows in the final product. Iron oxide dulls whiteness; silica abrades processing equipment. Our uncoated series holds both at 0.001% — with 97% brightness verified batch by batch.
The result is a high-whiteness extender that lets formulators reduce titanium dioxide and premium pigment loads without losing brightness.
| Property | Value |
|---|---|
| CaCO₃ purity | 99.9% |
| Brightness | 97% |
| Fe₂O₃ | 0.001% |
| SiO₂ | 0.001% |
| Moisture | 0.02% |
| Bulk density | 0.82 g/cm³ |
The Grades
Ultra-fine natural grade — 1.52 µm median. A premium high-brightness extender where fineness and whiteness drive quality.
Fine natural grade — 2.10 µm median, 8.05 µm top cut — balancing opacity, gloss control and cost in coatings and paper.
All-round natural grade — 2.56 µm median — dependable filler performance across paints, construction and paper.
Medium natural grade — 2.78 µm median, 11.69 µm top cut — controlled coarseness that improves economics without losing whiteness.
Coarse natural grade — 3.05 µm median, 13.94 µm top cut — a rheology and cost optimizer for construction chemicals and rubber goods.
Our coarsest natural grade — 3.38 µm median, 18.26 µm top cut — maximum economy for high-volume applications.
For PE, PP, PVC and rubber matrices, stearic-treated grades disperse better and process smoother.
