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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 ...
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.
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]
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]
Fire-King Mixing Bowls Turquoise Blue Swedish Modern Bowl Set Ivory Glassware Jadeite Ball Jug Examples of Jadeite and Rainbow. Fire-King is an Anchor Hocking brand of glassware similar to Pyrex. It was formerly made of low expansion borosilicate glass and ideal for oven use.
Only glass products containing at least 24% lead oxide may be referred to as "lead crystal". Products with less lead oxide, or glass products with other metal oxides used in place of lead oxide, must be labeled "crystallin" or "crystal glass". [4] In the United States it is the opposite - glass is defined as "crystal" if it contains only 1% lead.
Shipping symbols [2] from ISO standard 780 "Pictorial marking for handling of goods" [3] or ASTM D5445 "Standard Practice for Pictorial Markings for Handling of Goods" [4] which depict shipping boxes as squares with rounded corners: "Fragile": the silhouette of a broken wine glass "This end up": a horizontal line with two arrows pointing up
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 Local and state laws have since been superseded by the federal Mess- und Eichgesetz ("Measurement and Calibration Act"), which in turn was updated to implement the EU directive.