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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 ...
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]
The glass used was crystal and seven colors of glass: amber, blue, green, pink, amethyst, brown, and ruby. Among Jamestown stemware, ruby is valued higher than other colors by collectors. [80] Among the milk glass patterns, Vintage was used for tableware and a few types of stemware from 1958 to 1965. [81]
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.
Blenko Glass Company is an art glass company that began producing in 1922 under the name Eureka Art Glass Company. The company name was changed to Blenko Glass Company in 1930. Originally an antique flat glass company, it was founded by Englishman William J. Blenko (1854-1933). Blenko came to the United States to make glass in 1893.
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