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Rublev Colours Azurite (pale) 50g

SKU: NAP-410-1205
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Description

Azurite is a natural carbonate of copper usually described as a bright blue or sometimes as a greenish blue. Azurite varies in masstone color from deep blue to pale blue with a greenish undertone depending on such factors as the purity of the mineral and the grade (particle size) of the pigment. This fine grade (average 25 micron particle size) of azurite is a pale blue with a greenish gray undertone.

Pigment Names
Common Names: English: azurite
French: azurite
German: Azurit
Italian: azzurrite
Spanish: azurita
Synonyms: English: blue verditer, bice, Mountain blue
French: bleu de montagne, bleu d'Allemagne
German: Bergblau
Italian: azzurro della magna
Latin: lapis armenius, azurium citramarinum
Nomenclature:
Common Name Primary Mineral Source
Azurite Azurite Hunan Province, China

 

Pigment Information
Color: Blue
Pigment Classification: Natural Inorganic
Colour Index: Pigment Blue 30 (PB30)
Chemical Name: Copper Carbonate
Chemical Formula: Cu3(CO3)2(OH)2
CAS No.: 1319-45-5
Series No.: 7
ASTM Lightfastness
Acrylic: Not Listed
Oil: Not Listed
Watercolor: Not Listed
Physical Properties
Particle Size (mean): 25 microns
Density: 3.80 g/cm3
Hardness: 3.50–4.00
Refractive Index: 1.758
Oil Absorption: 25 grams oil / 100 grams pigment
Health and Safety This is a natural substance that has not been evaluated for acute or chronic health hazards. Always protect yourself against potentially unknown chronic hazards of this and other chemical products by keeping them out of your body.

Copper carbonate is classified as hazardous under OSHA regulations (29CFR 1910.1200) (Hazcom 2012): Acute toxicity—Oral—Category 4
Skin irritant—Category 2
Eye irritation—Category 2A

Based on this information we present the following health warning:
WARNING! Contains Copper Carbonate. Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. Avoid ingestion, excessive skin contact, and inhalation of dusts. Conforms to ASTM D-4236.

For a detailed explanation of the terms in the table above, please visit .

Origin and History of Use

According to some authorities, azurite has been found in paint pigment as early as the Fourth Dynasty in Egypt.

Source

Azurite is a natural carbonate of copper and is found in many parts of the world in the upper oxidized portions of copper ore deposits along with malachite. Our azurite is from copper ore deposits in Hunan Province, China.

Permanence and Compatibility

Despite azurite being a carbonate, and hence sensitive to acids, it has a good record in respect to permanence where employed in oil- and tempera media. It is darkened when exposed to sulfur fumes, especially where it is used in mural paintings. It is unaffected by light. Azurite pigment is said to turn green due to alteration to malachite. Although copper pigments tend to exert both a siccative and antioxidant effect in oil-medium, some examples have shown that azurite tends to discolor when applied in thick, coarse-textured layers.

Oil Absorption and Grinding

No data has been published on the oil absorption properties of azurite. Coarsely ground azurite produces a dark blue pigment; fine grinding produces a lighter tone. We offer a fine and medium ground pigment with an intense blue hue. Azurite is most successfully employed in aqueous medium, such as tempera, because of its refraction index.

Toxicity

Azurite is moderately toxic and care should be used in handling the dry powder pigment as well as the pigment dispersed in medium.

For more information on how to handle pigments safely, please visit .

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This product is shipped from our warehouse in Willits, CA , US
Our guarantee
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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