Chalk (Calcite)

As low as $6.10
In stock
Only %1 left

Calcite is a brilliant white, fine whiting (chalk) for making grounds and adding to paint. Our whiting is dry ground from limestone deposits. Use this whiting to make chalk grounds and for adding texture and body to paints.

The finest whiting for making brilliant white chalk grounds. Our whiting is dry ground from limestone deposits in the Lucerne Valley, California. Dry grinding limestone reduces it to a powder without destroying its particle structure, which is important in making strong chalk grounds and providing tooth on the surface of the grounds. The larger particle size of our chalk (when compared to precipitated chalk) keeps oil absorption low, which is ideal when adding it to oil paint and mediums. In painting grounds, it makes a durable surface with tooth for egg and casein tempera, distemper, encaustic, and oil paint.

Add to oil colors and mediums to create textural and bodying qualities to oil paint without affecting the color. Chalk has a little color in drying oil, so it can be added to oil paint without affecting the tint of the color.

DescriptionDry ground limestone with a closely-controlled particle size distribution.
SourceLucerne Valley, California
Chemical NameCalcium Carbonate
Chemical FormulaCaCO3
CAS No.13397-26-7
Typical Physical PropertiesFineExtra-Fine
Median Particle Size13.0 microns3.5 microns
Dry Brightness (Hunter Y, Rd Value)9596
Retained on 325 Mesh Screen0.001%0.1%
Oil Absorption8.5 g oil / 100 g pigment10.5 g oil / 100 g pigment
Loose Bulk Density0.69 g/cc (43 lbs./ft3)0.46 g/cc (29 lbs./ft3)
Packed Bulk Density1.63 g/cc (102 lbs./ft3)1.14 g/cc (71 lbs./ft3)
Specific Gravity2.72.7
Mohs Hardness2–32–3
Typical Chemical Analysis
Calcium Carbonate (CaCO3)98.5%
Magnesium Carbonate (MCO3)1.0%
Iron Oxide (Fe2O3)<0.025%
Moisture Loss @110° C.<0.2%
More Information
BrandRublev Colours
VendorNatural Pigments
Processing TimeUsually ships the next business day.
Here are items you recently viewed during your visit of Natural Pigments Recently Viewed
No recently views items
Clear All
Chalk (Calcite)
Copyright © 2012-present Natural Pigments, Inc. All rights reserved.