This is a high purity, natural crystalline silica that comes from quartz quarries in Oklahoma. It is a fine ground silica sand that is inherently inert, white, bright, and is at least 99.2% silicon dioxide. Special processing assures a controlled particle size distribution, which eliminates excessively coarse and fine particles. These properties, combined with its inertness and low cost, make silica an excellent filler and extender for paint.
The hardness and inertness of silica improves resistance to wear, burnish, abrasion and stains. The narrow size distribution and bright white color, minimizes binder demand and yields an excellent color. It is also often used to replace as much as 50% of titanium dioxide in paint formulations.
Silica (SiO2) is a compound formed from silicon and oxygen. Because oxygen is an abundant element and silicon is the second most abundant element in the Earth's crust, the formation of silica is quite common in nature. Silica sand, the substance used to derive pure silicon, is made of quartz, which is the most common form of silica found in nature. Crystalline silica exists in seven different forms. The three major forms, quartz, cristobalite and tridymite, are stable at different temperatures. Within the three major forms are subdivisions. Crystalline silica is ubiquitous, being in rocks from every geologic era and from every location around the world.
Add silica to paint and mediums to create textural and bodying qualities in oil paint without affecting the color. Silica has little color in drying oil, so it can be added to oil paint without affecting the tint of the color. Due to its hardness it tends to add a discernible texture to paint. Add to chalk or gesso to add texture or 'tooth' in chalk or gesso grounds.
A fine dry-ground silica with a closely-controlled particle size distribution.
Mill Creek, Oklahoma
Silicon Dioxide (SiO2)
Typical Physical Properties
Median Particle Size
Particles Finer than 5 Microns
Retained on 325 Mesh Screen
42 g oil / 100 g pigment
Bulk Density, Compacted
Bulk Density, Loose
Health and Safety
WARNING: This product contains crystalline silica, which can cause silicosis (an occupational lung disease) and lung cancer. For detailed information on the potential health effects of crystalline silica, see the Material Safety Data Sheet.
Source: Mill Creek, Oklahoma Silicon Dioxide (SiO2): 99.4% Median Particle Size: 1.6 microns Particles Finer than 5 Microns: 96.3% Retained on Mesh Screen: 0.003% Hardness: 7 Reflectance: 94.5% pH: 6.7 Oil Absorption: 42 g oil / 100 g pigment Bulk Density: 41.0 lbs./ft3, 36 lbs./ft3
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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