Schmincke Horadam Aquarell Artist Watercolor - Cobalt Blue Deep, 15 ml tube

Pigment Information

This color contains the following pigments:

PB74-Cobalt Zinc Silicate Blue Phenacite

Pigment Name

PB74-Cobalt Zinc Silicate Blue Phenacite

Pigment Type

inorganic

Chemical Name

cobalt zinc silicate

Chemical Formula

(CoZi)2SiO4

Properties

Cobalt-zinc silicate is semi opaque and semi-soluble in water. It produces a warmer and darker blue that standard Cobalt Blue (PB28), and is used most often in glass and ceramics.

Permanence

Cobalt-zinc silicate is extremely lightfast and temperature stable.

Toxicity

Cobalt-zinc silicate is toxic, and its toxictiy may be of greater concern that for Cobalt Blue (PB28) because it is semi-soluble in water.

History

Since the discovery of processes for mining Cobalt Blue (PB28) in the 19th century, additional processes for manufacturing and purifying other cobalt salts have become available. Their use as artist pigments has followed.