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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.
Here's your guide to identifying whether your glass is vintage or antique, plus how to spot rare art glass, ... Any Signatures or Marks. Look to see if the glass has been signed or marked. Usually ...
Northwood mark on a vase. The most common Northwood maker mark was an underlined capital N centered inside of a circle. [13] [14] Not all pieces carry the mark but it is seen most often on carnival glass items. L.G. Wright also used a mark like it, but was forced to stop using it. [13]
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 glassware. [8] In 1981, David Grossman bought the factory from the Brainard family and changed the mark. The new mark was the word Westmoreland in a circle around three lines. [8]
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]
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
The glass made using this formula had good enough quality that the company could compete in the high-end of the glassware market. [62] This improvement in the formula for glass was considered one of two great advances in American glassmaking during the 19th century, the other being the invention of pressing. [63]
Inscribing marks on the manufactured items was likely a precursor of communicative writing. [4] Historically, the marks were used for few purposes: [5] declaration of the ownership (an ownership mark, for example, livestock branding [6]); identification of the manufacturer and place of origin (manufacturer's mark, maker's mark, later a factory ...