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ArtistSupplySource.com » Painting & Painting Accessories » » » Natural Pigments Ultramarine Blue (Greenish Shade) 500 g - Color: Blue
 

Natural Pigments Ultramarine Blue (Greenish Shade) 500 g - Color: Blue

SKU: NAP-417-1850
Natural Pigments Ultramarine Blue (Greenish Shade) 500 g - Color: Blue
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 1   US$ 57.63 
 2   US$ 57.28 
 3   US$ 57.08 
 4-5   US$ 56.94 
 6-7   US$ 56.74 
 8-11   US$ 56.59 
 12+   US$ 56.39 
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Product description

Details
Ultramarine Blue is a synthetic inorganic blue pigment consisting of a double silicate of aluminum and sodium with sulfide and occurs in nature as a component of the semi-precious stone, lapis lazuli.

Color Names
Common Names: Dutch: ultramarijnblauw
English: ultramarine blue
French: bleu outremer
German: Ultramarinblau
Italian: blu oltremare
Spanish: azul ultramarino
Alternate Names: azure blue, azzurrum ultramarine, azzurrum transmarinum, azzuro oltramarino, azur d'Acre, Lazurstein, pierre d'azur


Origin and History
In 1814, Tassaert observed the spontaneous formation of a blue compound, very similar to ultramarine, if not identical with it, in a lime kiln at St. Gobain, which caused the Societ´┐Ż pour l'Encouragement d'Industrie to offer, in 1824, a prize for the artificial production of the color. Processes tomake the artificial pigment were devised by Jean Baptiste Guimet (1826) and by Christian Gmelin (1828); but while Guimet kept his process a secret, Gmelin published his and thus became the founder of the "artificial ultramarine" industry.

Source
Ultramarine is a blue pigment consisting of a double silicate of aluminum and sodium with sulfide and occurring in nature as a component of lapis lazuli. The Colour Index designation is Pigment Blue 29 and Colour Index number is 77007. Ultramarine is one of the most complex mineral pigments, a sulfur-containing compound of sodium-silicate, essentially a mineralized limestone containing a blue cubic mineral called lazurite (the major component of lapis lazuli). The term ultramarine designates both the natural mineral and the artificial pigment, although today most distinguish the natural mineral by its name lazurite or the rock containing it, lapis lazuli.

Permanence and Compatibility
Ultramarine is a synthetic blue pigment that is rated by the American Society of Testing and Materials (ASTM International) as lightfastness category I, which is the highest lightfastness. It is compatible with all pigments, but is sensitive to acids, so avoid using it with acidic mediums and supports.

Oil Absorption and Grinding
Ultramarine blue absorb a medium amount of oil (38 to 42 grams per 100 grams of pigment), which may slow the drying of oil paint and hence is a moderate drying oil color. It is highly refractive pigment and is difficult to grind in oil, although it easily disperses in water.

Toxicity
Ultramarine blue is not considered toxic, but care should be used in handling the pigment.


Pigment: Ultramarine Blue (Greenish Shade)

Pigment Information
Color: Blue
Colour Index: Pigment Blue 29 (77007)
Chemical Name: Sodium Sulfide Aluminosilicate
Chemical Formula: Na2OSAl2O3SiO2
ASTM Lightfastness Rating
Acrylic: I
Oil: I
Watercolor: I
Properties
Specific Gravity: 2.35
Oil Absorption: 38-42 g oil / 100 g pigment
Median Particle Size: 2-4 microns






Specifications:

Color: Blue
Color Index: Pigment Blue 29 (77007)
Chemical Name: Sodium Sulfide Aluminosilicate
Acrylic: I
Oil: I
Watercolor: I
Oil Absorption: 38-42 g oil / 100 g pigment
Median Particle Size: 2-4 microns


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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