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Marble Dust (Medium) 5kg

SKU: NAP-510-10GS1005K
Marble Dust (Medium) 5kg
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Qty Price
 1   US$ 38.85 
 2   US$ 38.62 
 3   US$ 38.48 
 4-5   US$ 38.38 
 6-7   US$ 38.25 
 8-11   US$ 38.15 
 12+   US$ 38.01 
Price: US$ 38.85
US$ 38.85

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Product description


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.

Extender Pigment Marble, Fine Marble, Medium
Description A fine particle size marble with a closely-controlled particle size distribution. A medium particle size marble featuring a careful control of oversized particles.
Source Marble Hill, Georgia Sahuarita, Arizona
Chemical Analysis
Calcium Carbonate 95% 95%
Typical Physical Properties
Mean Particle Size 11 microns 20 microns
Hegman Fineness 3
Brightness (Hunter Y) 92 88
Retained on 325 Mesh Screen 0.03% 12%
Moisture 0.12% 0.15%
Acid Insolubles 2% 3%
Oil Absorption 9 g oil / 100 g pigment
Solid Density ( 22.7 22.7
Bulk Density, Packed 80 lbs./ft3 95 lbs./ft3
Bulk Density, Loose 55 lbs./ft3 65 lbs./ft3
Specific Gravity 2.7 2.7
Refractive Index, mean 1.6 1.6
Mohs Hardness 3 3

Natural Pigments

Natural Pigments is a limited liability company based in Willits, California. We manufacture and distribute rare and hard-to-find materials for fine artists and decorators. We specialize in supplying artists' materials that were used in historical painting since pre-historic times up to and including the nineteenth century.

We constantly search for materials and products of the finest quality so that we can bring them direct to you from the source. To do so, we travel the world to find materials specifically for use by professional artists and decorators. We obtain minerals from mines in Afghanistan, Chile, Russia, Ukraine and Uzbekistan, to name a few places, processing these into natural pigments. We purchase resins, gums and plants from India, Kenya and Malaysia to make natural varnishes and painting mediums.

Our mission is to provide the largest variety of natural pigments, paints and other professional artists' supplies, enabling us to bring you a selection that makes shopping for rare and hard-to-find art materials easy. Our objective is to promote the education and use of these materials among artists by providing detailed information for their employment in encaustic, fresco, oil, watercolor and tempera painting.
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This product is shipped from our warehouse in Gretna, NE, USA.
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
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Marble Dust (Medium) 5kg

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