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During the late 18th century Richard Champion, a Bristol merchant and potter, making Bristol porcelain, was working with a chemist, William Cookworthy. [1] Cookworthy began a search for good quality cobalt oxide to give the blue glaze decoration on the white porcelain and obtained exclusive import rights to all the cobalt oxide from the Royal Saxon Cobalt Works in Saxony. [2]
Cobalt glass—known as "smalt" when ground as a pigment—is a deep blue coloured glass prepared by including a cobalt compound, typically cobalt oxide or cobalt carbonate, in a glass melt. Cobalt is a very intense colouring agent and very little is required to show a noticeable amount of colour. Cobalt glass plates are used as an optical ...
Using cobalt oxide imported by William Cookworthy from Saxony, Isaac designed and branded Bristol blue glass as it is known today. The Jacobs family were well-placed to develop Bristol blue glass: German glass engraving was highly prized, and continental Jews worked traditionally with coloured glass.
Blue Pale to deep blue. [20] Cobalt Blue A deep shade of blue and the most sought after. [20] Independence Blue 1975-76 A cobalt blue carnival treatment made during the U.S.Bicentennial. [21] Green This color ranges from a deep green to a light yellow green. [20] Marigold A yellow orange color. [20] Red A red color that is deep when held to a ...
Cobalt blue, a pigment of cobalt oxide-aluminium oxide, was a favourite of Auguste Renoir and Vincent van Gogh. It was similar to smalt, a pigment used for centuries to make blue glass, but it was much improved by the French chemist Louis Jacques Thénard, who introduced it in 1802. It was very stable but extremely expensive.
Potters occasionally substituted manganese or iron oxide for cobalt oxide to produce brown, instead of blue, decorations on the pottery. In the last half of the 19th century, potters in New England and New York state began producing stoneware with elaborate figural designs such as deer, dogs, birds, houses, people, historical scenes and other ...
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3579 S High St, Columbus, OH · Directions · (614) 409-0683