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Sennelier keeps a watchful eye on the pigments selected for its lines of extra-fine oils, oil sticks, watercolors, soft pastels, and oil pastels. These same pure pigments are now available to artists wishing to master the preparation of their own colors.
Color Swatches created using loose powder and were applied on 4" diameter × ½" deep dish of plastic material.
cobalt zinc aluminate
Cobalt zinc aluminate produces a deep, bright shade of Cobalt Blue
Cobalt salts are extremely lightfast and temperature stable.
Cobalt salts are toxic.
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.
Cobalt Blue Deep
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