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Old Holland has been making artist colors since 1664, as one of the oldest continuously operating companies in the art supply industry. The company is known for uncompromising adherance to its techniques and standards. All color making is done by hand
Color Swatches created using heavy application/medium application/50% tint and were applied on acrylic primed canvas (7 oz) material.
cobalt zinc silicate
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.
Cobalt-zinc silicate is extremely lightfast and temperature stable.
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.
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.
Cobalt Blue Deep
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Material Safety Data Sheet
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