Derivan Matisse Fluid Acrylic: Cobalt Blue 135ml

• Chemical Description: Oxides of cobalt & chromium

• Pigment Numbers: PB28

• Lightfastness Rating: ASTM I

• Pigment Opacity: Opaque

• Paint Opacity: Opaque

• Series 5

Cobalt Blue usage dates back more than 3,000 years for the coloring of blue glass but the source of the color was not understood and so its use tended to be sporadic and accidental. It occurs in association with copper and nickel ores and wherever it occurs arsenic is always present. Miners thought were attempting to extract the copper and when cobalt was present and the ore smelted arsenic oxide would be produced thus the cobalt component was regarded as evil and it gained the name kobold which means “goblin” and the modern name descends from this miners curse word.