Clear glass powder made from leaded crystal glass and ground into fine powder can be used in all media to give colors added luminosity or to create textural effects on the surface of paintings.
Colored and clear glass powder can be used in all media, such as oil, acrylic dispersions, lime and all kinds of glues. In certain mortars and cements, the colored glass may cause blooming. For application in exterior environments, it is advisable to do trials first.
Origin and History National Gallery of Art conservation scientist Barbara Berrie and art historian Louisa C. Matthew of Union College found that glass powder was used in the "Venetian palette" to give it extraordinary luminosity. The Venetian glass industry, centered on the island Murano in the Venetian lagoon, flourished in the late 15th century. According to Matthew and Berrie, painters obtained pigments of superior quality from "color sellers," and added pulverized glass to lend added brilliance to the hues in their pictures.
Source Colored glass is produced by melting leaded crystal glass with heavy metal oxides to achieve a wide variety of colors. The colored glass is then crushed and ground to a gritty powder less than 0.25 mm particle size. The powder is then sieved into three different grades:
Fine: Finer than 63 μ. The finest glass powder is easily worked with the brush in any media, such as watercolor, oil, acrylic dispersion, etc.
Medium: 63–106 μ. The fine powder can be used in all media; its coloring strength is better than the fine grade. The coarse powder gives brilliance and body to paint, but it may be too coarse to be applied in watercolor or glazing techniques. The glass particles are visible in thin layers.
Coarse: 106 μ and coarser. These glass particles have a sandy texture and can be strewn onto a surface; the glass particles create a glittering surface. The particles can be moved around on the surface, ideal for fresco techniques and sand-like textures.
Permanence and Compatibility The lightfastness of all colored glass powders is excellent. Colored and clear glass powder can be used in all media, such as oil, acrylic dispersions, lime and all kinds of glues. In certain mortars and cements, the colored glass may cause blooming. For application in exterior environments, it is advisable to do trials first.
Oil Absorption and Grinding Clear glass powder absorbs very little oil (18 g oil per 100 g of pigment). It has a drying effect on oil paint, because of its lead content. It is difficult to grind because of its hardness.
Toxicity Glass powders may contain lead and cadmium. Avoid dust, do not breath in dust. The dangers of lead have a cumulative effect. Utmost care should be used in handling the dry powder pigment to avoid breathing the dust. It is only moderately toxic in contact with the skin.
Filler: Clear Glass Powder
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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Hello, how much lead is in this powder? The reason I'm asking is because I'm looking for a powder that is made up of crystal glass with a high amount of lead in it. So how much lead is there (if you know)? is it 25%, 30%, etc? asked on Aug 16, 2017
49% answered by Tatyana (Staff)
on Aug 17, 2017