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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 aluminate, also known as "cobalt blue", [8] can be used in a similar way. Cobalt glass such as Bristol blue glass is appreciated for its attractive colour and is popular with collectors. It is used in the distinctive blue bottles of Harvey's Bristol Cream sherry and Tŷ Nant mineral water. Ming dish, with smalt blue decoration
Some reagent bottles are tinted amber (actinic), brown or red to protect light-sensitive chemical compounds from visible light, ultraviolet and infrared radiation which may alter them; other bottles are tinted blue (cobalt glass) or uranium green for decorative purposes -mostly vintage apothecary sets, from centuries in which a doctor or ...
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.
Purple sea glass is very uncommon, as is citron, opaque white (from milk bottles), cobalt blue and cornflower blue (from early Milk of Magnesia bottles, poison bottles, artwork, Bromo-Seltzer and Vicks VapoRub containers), and aqua (from Ball Mason jars and certain 19th century glass bottles). These colors are found once for every 200 to 1,000 ...
Milk Glass with a blue edge. [25] Black Rose 1953-54 Peach Blow with a black edge. [25] Blue Ridge 1939 French Opalescent with a blue edge. [25] Crystal Crest 1942 Milk glass with a double row of crystal and white glass. [25] Emerald Crest 1949-55 Also called Green Crest in 1949. [25] Gold Crest 1943-45 Yellow glass on the edge of Milk glass ...