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Older clear-glass Pyrex manufactured by Corning, Arc International's Pyrex products, and Pyrex laboratory glassware are made of borosilicate glass. According to the National Institute of Standards and Technology , borosilicate Pyrex is composed of (as percentage of weight): 4.0% boron , 54.0% oxygen , 2.8% sodium , 1.1% aluminum , 37.7% silicon ...
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. Currently it is made of tempered soda-lime-silicate glass in the US [ 1 ] and borosilicate in Japan [ 2 ]
Pyrex, a brand name for break-resistant glass bakeware, has offered complementary brown (Fireside) and Cranberry tinted lines to match Visions colorways in the past. Care must be made to distinguish between Visions and bakeware marketed under the Pyrex brand name, as the thermal properties of each product are quite different.
A dimpled glass pint jug with "Pint to Line" and Crown certification mark Tulip-shaped glass with the Crown stamp. In the United Kingdom, draught beer must be sold in Imperial measure (see Pint § Effects of metrication). English, Scottish and Northern Irish law all require certain steps be taken to ensure that a pint of beer is indeed a pint.
"G" grill on a stamp of the 1869 issue. A grill on a postage stamp is an embossed pattern of small indentations intended to discourage postage stamp reuse.Used in the United States in the 1860s and 1870s, they were designed to allow the ink of the cancellation to be absorbed more readily by the fibres of the stamp paper, making it harder to wash off the cancellation.
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]
Scans from Dr. Meng's collection began appearing in volume 4 of the 2002 catalog. Together with generous access by many other collectors, Meng's cooperation has resulted in creation of scanned images of all but about 1300 stamps by Scott as of 2024 catalogue series. About 120 are specialized stamps from the US Specialized Catalogue.
A sheet of soft steel was cut, sufficient in size to take 240 impressions of the stamps arranged in twenty horizontal rows of twelve. Onto this plate a series of guide dots were marked, some of which were joined with guide lines to allow the correct registration of the impressions.