Winsor & Newton Professional Acrylics - Cobalt Blue Deep, 60 ml tube

Pigment Information

This color contains the following pigments:

PB73-Cobalt Blue Deep

Pigment Name

PB73-Cobalt Blue Deep

Pigment Type

inorganic

Chemical Name

cobalt silicate blue olivine

Chemical Formula

Co2SiO4

Properties

Cobalt silicate blue olivine is a transparent blue pigment with low tinting strength.

Permanence

Cobalt silicate blue olivine is permanent and lightfast. Its stability at high temperatures has made it a favorite in coloring glassware and ceramics.

Toxicity

Cobalt silicate blue olivine is mildly toxic and a respiratory irritant, but less toxic than some of the other cobalt salts used as pigments. In liquid form it is not considered hazardous.

History

Cobalt silicate blue olivine is a cobalt salt that is frequently used as a colorant in glass and ceramics. It has been used in natural mineral forms since ancient times. Techniques for manufacturing Cobalt Blue, a chemically pure salt of cobalt and aluminum oxide, were developed in 1802. Synthetic processes for other cobalt salts, including cobalt silicate blue olivine, were developed in the 19th century.