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Pontil scar on the base of a free-blown glass bowl. A pontil mark or punt mark is the scar where the pontil, punty or punt was broken from a work of blown glass.The presence of such a scar indicates that a glass bottle or bowl was blown freehand, while the absence of a punt mark suggests either that the mark has been obliterated or that the work was mold-blown.
A fill line on a German wine glass. Germany has had a number of weights and measures acts specifically addressing volumetric markings on glassware. Local and state laws have since been superseded by the federal Mess- und Eichgesetz ("Measurement and Calibration Act"), which in turn was updated to implement the EU directive.
These pieces were rolled in glass frit, which is ground up pieces of glass, and then shaped by hand. [6] After the company was renamed to the Diamond glass company many Dugan molds were still used. To help with identification the title Dugan-Diamond is often used as an umbrella term.
Westmoreland was known to use primarily two marks on their products. The first mark was a "W" found inside of a Keystone which can be found from the period of 1910 through the mid 1940s. The second mark, which is the more commonly known by collectors and dealers, is the intertwined W and G that Westmoreland began to use in 1946 on most of the ...
Another type of mark is found on glass baskets. Where the glass handles of the baskets are attached to the base of the basket a stamp is made. [9] Each handler had a specific pattern to help identify which handler attached the handle. [9] The marks began in the 1950s and were instituted by Frank M. and Bill Fenton. [9]
This list of glassware [1] includes drinking vessels (drinkware), tableware used to set a table for eating a meal and generally glass items such as vases, and glasses used in the catering industry. It does not include laboratory glassware .
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Brown glass jars with some clear lab glassware in the background Laboratory glassware may be made from several types of glass , each with different capabilities and used for different purposes. Borosilicate glass is a type of transparent glass that is composed of boron oxide and silica, its main feature is a low coefficient of thermal expansion ...