Marble Dust 5kg Fine

$40.00
In stock
Only 3 left
SKU
510-10GS2555K
Brilliant white, fine particle size, marble dust for making grounds. Free-flowing, dry ground marble from natural calcite deposits with a controlled particle size. Use this marble powder to make grounds and for adding texture to paint. 5 kg (11 lbs)

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

Both limestone and marble are calcium carbonate (CaCO3), which is also the composition of the mineral calcite. Marble is a metamorphic rock composed of recrystallized calcite. The metamorphism of limestone causes the calcite grains to grow in size and to interlock with one another. The result is that marble is noticeably more dense and harder than limestone. Limestone forms under deep marine conditions from the gradual accumulation of minute calcite plates (coccoliths) shed from micro-organisms called coccolithophores and hence contains invertebrate fossils. However, these fossils are almost always destroyed by the metamorphic changes that convert limestone to marble.

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

Properties
Extender PigmentMarble, FineMarble, Medium
DescriptionA fine particle size marble with a closely-controlled particle size distribution.A medium particle size marble featuring a careful control of oversized particles.
SourceMarble Hill, GeorgiaSahuarita, Arizona
Chemical Analysis
Calcium Carbonate95%95%
Typical Physical Properties
Mean Particle Size11 microns20 microns
Hegman Fineness3
Brightness (Hunter Y)9288
Retained on 325 Mesh Screen0.03%12%
Moisture0.12%0.15%
Acid Insolubles2%3%
Oil Absorption9 g oil / 100 g pigment
Solid Density (lbs.gal)22.722.7
Bulk Density, Packed80 lbs./ft395 lbs./ft3
Bulk Density, Loose55 lbs./ft365 lbs./ft3
Specific Gravity2.72.7
Refractive Index, mean1.61.6
Mohs Hardness33
More Information
SKU510-10GS2555K
BrandRublev Colours
VendorNatural Pigments
Processing TimeUsually ships the next business day.
Size5 kg
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Marble Dust 5kg Fine
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