Chalk

LKAB Minerals offer UK manufactured Chalk from a local high quality soft white chalk deposit that has been quarried for more than sixty years.

Chalk whiting is a versatile filler useful in paints, powder coatings, textured coatings, dry wall compounds, sealants and mastics. Rigid and flexible PVC, epoxy compounds, adhesives, rubber, printing inks and paper products can all utilise the mineral chalk.

Chalk rocks and powder

Chalk product uses

Coatings

Chalk is particularly useful in paints and powder coatings as it provides body, adjusts sheen, increases viscosity and extends expensive pigments.

Polymers

Chalk whiting is used as a general purpose filler in rubbers and plastics to reduce overall costs and to enhance the polymer’s properties. Coated grades from our range are particularly well suited in PVC applications.

Sealants

Uncoated products are an effective extender for titanium dioxide in acrylic sealants where the colour and opacity are maintained. Coated products improve dispersion properties and reduce plasticiser demand in non water based sealant systems.

LKAB Minerals chalk in solid sealants

Chalk properties

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 a variety of 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.

Physical properties:

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:

Calcium as CaO (%) 52 - 55

Chalk mine

Chalk standard grades

Uncoated grades: MC5, MC40
Whiter uncoated grades: MC20H, MC40H
Stearate coated grades: ST10, ST10H

Chalk packaging

Our Chalk product range is available in paper sacks, big bags or bulk.

Chalk origin

Quarried in the UK from a high quality soft white chalk deposit.

Chalk toxicology

A non-toxic, non-hazardous stable mineral. For further information please download the Safety Data Sheet on the right of this page.

Please contact us for datasheets on a single grade or further information on our Chalk product range. You can find our sales contact by chosing your country in the upper right of this page or by visiting our contacts page.

Product expert

Steve Banahan
Business Manager

Ask me a question. Contact information.

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