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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 databases are a collection of glass compositions, glass properties, glass models, associated trademark names, patents etc. These data were collected from publications in scientific papers and patents, from personal communication with scientists and engineers, and other relevant sources.
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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 Local and state laws have since been superseded by the federal Mess- und Eichgesetz ("Measurement and Calibration Act"), which in turn was updated to implement the EU directive.
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 ...
Laboratory glassware is a variety of equipment used in scientific work, traditionally made of glass. Glass may be blown, bent, cut, molded, or formed into many sizes and shapes. Glass may be blown, bent, cut, molded, or formed into many sizes and shapes.
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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.