Essential in agriculture and construction.
Fine calcium carbonate mineral.
Chalk filler is a valuable component in many industries, including construction, paints, and coatings. LKAB Minerals offers high-quality Chalk filler that is used to improve the consistency, strength, and durability of products.
With its excellent absorption properties, Chalk is ideal for applications such as adhesives, sealants, and cementitious products. Its versatility and ease of use make it an essential material for enhancing product performance, whether in construction materials or manufacturing processes. Explore how our Chalk filler can add value to your operations and improve the performance of your end products.
Our Chalk filler can be supplied throughout the UK.
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:
| Uncoated grades | Whiter uncoated grades | Stearate coated grades |
| MC5 | MC20H | ST10 |
| MC40 | MC40H | ST10H |
Our product range is available in 25kg paper sacks, 1000kg bulk bags or in bulk within a tanker.
Chalk filler is a fine, high-purity calcium carbonate used to enhance performance in various industrial applications. Some key applications include:
Paints & coatings
Rubber & plastics
Sealants & adhesives
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.
| 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 |
Below you can see the composition of each of the following chemicals: 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 |
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.
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.
Select LKAB Minerals' high-quality Chalk filler for your industrial needs and experience enhanced product performance. Our team is available to provide guidance and support tailored to your requirements. <br>
You can also find us on social media channels such as Facebook, LinkedIn and YouTube. Together, let’s build a better future with high-quality minerals.
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