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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.
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]
It combined cobalt(II) oxide with aluminum(III) oxide at 1200 °C. It was also used as colorant, particularly in blue glass and as the blue pigment used for centuries in Chinese blue and white porcelain, beginning in the late eighth or early ninth century. [15] Cobalt glass, or Smalt, is a variation of cobalt blue. It is made of ground blue ...
Nickel, depending on the concentration, produces blue, or violet, or even black glass. Lead crystal with added nickel acquires purplish color. Nickel together with a small amount of cobalt was used for decolorizing of lead glass. Chromium is a very powerful colorizing agent, yielding dark green [6] or in higher concentrations even black color.
Plain glass versions are lowball glasses. [citation needed] Old fashioned glasses typically have a wide brim and a thick base, so that the non-liquid ingredients of a cocktail can be mashed using a muddler before the main liquid ingredients are added. [citation needed] Old fashioned glasses usually hold 180–300 ml (6–10 US fl oz).
The New Martinsville was founded in 1901 in an old glass factory in New Martinsville, West Virginia. At first, it relied upon pressed glass patterns for the majority of its income. By 1905 the company began embellishing their work by adding gold paint and ruby stain. [4]
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