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It is uncertain when Bristol blue glass was first made but the quality and beauty of the glass swiftly gained popularity, with seventeen glass houses being set up in the city. [3] Lazarus and Isaac Jacobs were the most famous makers of Bristol blue glass in the 1780s. Lazarus Jacobs was a Jewish immigrant to Bristol from Frankfurt am Main, Germany.
Cobalt glass for decoration. 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.
Details of the process and the composition of the glass vary and so do the results, because it is not a simple matter to obtain or produce properly controlled specimens. [5] Small concentrations of cobalt (0.025 to 0.1%) yield blue glass. The best results are achieved when using glass containing potash. Very small amounts can be used for ...
Xianbei glass water dropper Blue glass plaques found in the Mausoleum of the Nanyue King, dating from late 2nd century BCE. In China, glass played a peripheral role in arts and crafts when compared to ceramics and metal work. [24]
Depending on the type and color of glass, other additives were used. Lead and tin were added for white opaque glass (latimo). Cobalt was used for blue glass. Copper and iron were used for green and for various shades of green, blue, and yellow. [70] Manganese was used to remove colors. [71]
A typical nazar is made of handmade glass featuring concentric circles or teardrop shapes in dark blue, white, light blue and black, occasionally with a yellow/gold edge. [9] "The bead is made of a mixture of molten glass, iron, copper, water, and salt, ingredients that are thought to shield people from evil." [2]
Jadeite, “Jadite” or “Jade-ite” is a type of jade green opaque milk glass, originally popular in the United States in the early to mid-20th century.A blue milk glass called “Delphite” (Delfite, Jeannette Glass) and "Azur-ite" (Anchor Hocking) was also produced for several years.
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]