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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 ...
Glass coloring and color marking may be obtained in several ways. by the addition of coloring ions, [1] [2] by precipitation of nanometer-sized colloids (so-called striking glasses [1] such as "gold ruby" [3] or red "selenium ruby"), [2] Ancient Roman enamelled glass, 1st century, Treasure of Begram; by colored inclusions (as in milk glass and ...
The Westmoreland Glass Company was founded in 1889 when a group of men purchased the Specialty Glass Company located in East Liverpool, Ohio, and moved it to Grapeville, Pennsylvania. [1] Grapeville was chosen as the location of the factory because the property had a large source of natural gas. George West served as president of the company ...
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 resulting glass code is the value of n d − 1 rounded to three digits, followed by V d rounded to three digits, with all decimal points ignored. For example, BK7 has n d = 1.5168 and V d = 64.17, giving a six-digit glass code of 517642.
Golden Iris was the name of the first caravel glass treatment that Northwood developed in 1908. [3] It was known for its marigold color. [1] The other carnival glass treatments made by Northwood were Emerald, Azure, Florentine, Perl, and Pomona. [5] Carnival glass is identified by the color of the glass, not the color of the treatment.
The Buttler Art Glass site was offered for sale on February 20 and eventually sold to another group of investors (including Foster) that formed the Novelty Glass Company. [38] [Note 3] Despite the news releases about the new glass works, the Fostoria Shade and Lamp Company was not formally organized until after it was announced that Kopp was hired.
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 Local and state laws have since been superseded by the federal Mess- und Eichgesetz ("Measurement and Calibration Act"), which in turn was updated to implement the EU directive.