Product information
Chalk whiting is a versatile filler, useful for textured wall finishes as it provides high brightness and excellent whiteness. Among these, it is also profitable for rigid and flexible PVC, epoxy compounds, adhesives, rubber, printing inks, and paper products.
Chalk is a versatile mineral filler with attributes that make it valuable for use in various applications such as:
The fine soft nature of chalk coupled with a smooth, round particle shape and carefully controlled particle size distribution make it an ideal filler for various applications. Our unique deposit is free from the abrasive flints normally associated with chalk whiting.
General properties cover:
- good colour
- high brightness
- low oil absorption
- good temperature stability
- ease of mixing.
Our chalk standard grades
| Uncoated grades | Whiter uncoated grades | Stearate coated grades |
|---|---|---|
| MC5 | MC20H | ST10 |
| MC40 | MC40H | ST10H |
Chalk packaging
Our product range is available in paper sacks, big bags or bulk.
Mineral information
Head here for information on the physical properties, chemical properties, origin, and toxicology of Chalk.
Chalk, a calcium carbonate, is comprised of very fine calcite crystals each less then 1 micron in diameter. These crystals are derived from the disintegration of complex ring like structures. The structures are calcareous skeletal remains of minute marine organisms known as coccoliths. The fine soft nature of our products coupled with a smooth round particle shape and carefully controlled particle size distribution make it an ideal filler.
Physical properties of Chalk:
| Specific gravity [g/cm³] | 2.7 |
| Refractive index | 1.5 |
| Oil absorption [ml/100g] | 16 – 18 |
| Moisture content [%] | 0.25 |
| Loose bulk density [kg/l] (uncoated grades) | 0.5 |
| Loose bulk density [kg/l] (coated grades) | 0.7 – 0.9 |
| Compacted bulk density [kg/l] (uncoated grades) | 1 |
| Compacted bulk density [kg/l] (coated grades) | 1.1 |
Chemical properties of Chalk:
Below you can see the composition of each of the following chemical; Calcium Oxide (CaO), Silica Dioxide (SiO2), Aluminium Oxide (Al2O3), Potassium Oxide (K2O), Iron (III) Oxide (Fe2O3), and Magnesium Oxide (MgO) in Chalk.
| Property | Percentage |
|---|---|
| CaO [%] | 53 |
| SiO2 [%] | 3.5 |
| Al2O3 [%] | 0.45 |
| K2O [%] | 0.06 |
| Fe2O3 [%] | 0.15 |
| MgO [%] | 0.45 |
Chalk Mineral origin
LKAB Minerals manufacture our range of Chalk products in the UK from a local high-quality soft white deposit. This unique deposit is free from the abrasive flints normally associated with chalk whiting.
Toxicology
The mineral is non-toxic and non-hazardous.
To find out any further information, please fill in the contact form in the bottom right and a representative will be in contact.
