Sennelier French Artists' Watercolor Half Pans come in a range of 48 vivacious colors inspired by the original palette of the French Impressionists. Their honey-based formulation offers a smooth consistency as well as extraordinary brilliance, luminosity, and longevity.
Cobalt Deep
Color Swatch created using heavy application/diluted application and was applied on cold press watercolor paper (150 lb) material.
Cobalt zinc aluminate produces a deep, bright shade of Cobalt Blue
Permanence
Cobalt salts are extremely lightfast and temperature stable.
Toxicity
Cobalt salts are toxic.
History
Since the discovery of processes for mining and purefying 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.