Calcium Carbonate, Mesh 200 (75 µm)
A high-purity ground calcium carbonate at 200 mesh — bright, low oil absorption, and consistent enough to hold a formulation steady batch to batch. The general-purpose filler grade: dry-mix mortars, PVC, rubber, sealants and industrial use.
Physical properties
| Property | Unit | Result | Standard |
|---|---|---|---|
| Residue on 200 mesh (75 µm) | % | < 0.1† | — |
| Mean particle size, d50 | µm | 22† | — |
| Top cut, d98 | µm | 63† | — |
| Whiteness | % | 97† | — |
| Brightness (ISO) | % | 95† | — |
| Oil absorption | g/100 g | 14† | — |
| Mohs hardness | — | 3† | — |
| Specific gravity | — | 2.7† | — |
| Loose bulk density | g/cm³ | 1.0† | — |
| pH (10% suspension) | — | 9† | — |
| Moisture | % | < 0.2† | — |
Chemical composition
| Constituent | Symbol | Result | Standard |
|---|---|---|---|
| Calcium carbonate | CaCO₃ | ≥ 98† | — |
| Magnesium carbonate | MgCO₃ | < 0.8† | — |
| Silicon dioxide | SiO₂ | < 0.2† | — |
| Iron oxide | Fe₂O₃ | < 0.05† | — |
| Aluminium oxide | Al₂O₃ | < 0.1† | — |
| Acid-insoluble matter | — | < 0.3† | — |
| Loss on ignition | LOI | 43.5† | — |
† Typical value — indicative, not a certified guarantee. Certificate of analysis per consignment on request.
Applications
Mesh 200 is the volume grade — where the filler has to be cheap to carry, bright enough not to dull the mix, and coarse enough not to drink the binder.
Choosing between 200 and 600 mesh: Mesh 200 (d50 22 µm) for volume filling and dry-mix, where cost per tonne leads. Mesh 600 (d50 10 µm) where finish, brightness and smoothness lead — paints, plastics, fine fillers.
Packing & supply
- 25 kg bag
Storage & handling
- Keep sealed and dry — lime products react with moisture in storage.
- Handle with appropriate dust control and PPE.
- Rotate stock first-in, first-out and keep lots labelled.
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