This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not be construed as guaranteeing specific properties or suitability for a particular application
Opac Extra is an ultramicronized calcium carbonate derived from White Marble in Almeria. It is highly suitable for various applications due to its fine granularity and excellent physical and chemical properties.
| Component | Value |
|---|---|
| CaCO3 | 98.84% |
| MgCO3 | 0.87% |
| Al2O3 | 0.057% |
| Fe2O3 | 0.011% |
| Sn | < 0.001% |
| Pb | < 0.001% |
| Cd | < 0.0001% |
| Mn | 0.0074% |
| Cu | < 0.0001% |
| SiO2 | 0.10% |
| Loss of weight on calcination | 43.7% |
| Property | Method | Value | Unit |
|---|---|---|---|
| Granulometry D50 | Mastersizer S | 0.8 | µm |
| Granulometry D100 | Mastersizer S | 5.0 | µm |
| 45 µm Sieve retention | ISO 787R/7 | < 0.01 | % |
| Whiteness L | Spectraflash SF450 | 98.5 | % |
| Whiteness a | Spectraflash SF450 | -0.5 | – |
| Whiteness b | Spectraflash SF450 | 0.0 | – |
| Moisture | ISO 787R/2 | < 0.1 | % |
| pH (aqueous sol. 10%) | ISO 787R/9 | 9.0 | – |
| Oil Absorption | ISO 787R/5 | 25 | g/100 g CaCO3 |
| DOP Absorption | ISO 787R/5 | 54 | g/100 g CaCO3 |
| Specific Surface Area | B.E.T. | 8.0 | m2/g |
| Bulk Density (untamped) | ISO 787R/11 | 0.55 | Kg/l |
All data presented are average values representative of the production and are provided for informational purposes only. They cannot be considered contractual.
