2/17/2022 0 Comments Pyrex storageHowever, they admitted their testing conditions were "contrary to instructions" provided by the manufacturer. The consumer affairs magazine Consumer Reports investigated the issue and released test results, in January 2011, confirming that borosilicate glass bakeware was less susceptible to thermal shock breakage than tempered soda lime bakeware. Consumer Product Safety Commission reported it had received 66 complaints by users reporting that their Pyrex glassware had shattered over the prior ten years yet concluded that Pyrex glass bakeware does not present a safety concern. The differences between Pyrex-branded glass products has also led to controversy regarding safety issues-in 2008, the U.S. Since the closure of the soda-lime plant in England, European Pyrex has made solely from borosilicate. However, its thermal shock resistance is lower than borosilicate's, leading to potential breakage from heat stress if used contrary to recommendations. Also, it is cheaper to produce and more environmentally friendly. This change was justified by stating that soda-lime glass has higher mechanical strength than borosilicate-making it more resistant to physical damage when dropped, which is believed to be the most common cause of breakage in glass bakeware. The composition of both Corning 7740 and Schott 8330 is given as 80.6% SiO 2, 12.6% B 2O 3, 4.2% Na 2O, 2.2% Al 2O 3, 0.1% CaO, 0.1% Cl, 0.05% MgO, and 0.04% Fe 2O 3,īeginning in the 1980s, production of clear Pyrex glass cookware manufactured by Corning (and later Instant Brands, after the consumer division was spun off and renamed) was shifted to tempered soda-lime glass, like their opal bakeware. Īccording to glass supplier Pulles and Hannique, borosilicate Pyrex is made of Corning 7740 glass and is equivalent in formulation to Schott Glass 8330 glass sold under the "Duran" brand name. 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, and 0.3% potassium. Older clear-glass Pyrex manufactured by Corning, Arc International's Pyrex products, and Pyrex laboratory glassware are made of borosilicate glass. Over the years, designers such as Penny Sparke, Betty Baugh, Smart Design, TEAMS Design, and others have contributed to the design of the line.Ī clear borosilicate glass Pyrex measuring cup produced by Corning (right) and a clear tempered Pyrex soda-lime glass measuring cup produced by Instant Brands (left, differentiated by its different logo and bluish tint) He redesigned the Pyrex ovenware and Flameware. In 1958 an internal design department was started by John B. In the late 1930s and 1940s, Corning also introduced other products under the Pyrex brand, including opaque tempered soda-lime glass for bowls and bakeware, and a line of Pyrex Flameware for stovetop use this aluminosilicate glass had a bluish tint caused by the addition of alumino-sulfate. One of the first commercial products to be sold under the new mark was a pie plate, and in the interests of euphonism the letter r was inserted between pie and ex and the whole thing condensed to PYREX. Actually, we had a number of prior trade-marks ending in the letters ex. While some people have thought that it was made up from the Greek pyr and the Latin rex, we have always taken the position that no graduate of Harvard would be guilty of such a classical hybrid. The word PYREX is probably a purely arbitrary word which was devised in 1915 as a trade-mark for products manufactured and sold by Corning Glass Works. In the past, the brand name has also been used for kitchen utensils and bakeware by other companies in regions such as Japan and Australia.Ī Corning executive gave the following account of the etymology of the name "Pyrex": #Pyrex storage plus#In Europe, Africa, and the Middle East, the PYREX (all uppercase) trademark is licensed by International Cookware for bakeware that has been made of borosilicate and soda-lime glass, stoneware, metal plus vitroceramic cookware. #Pyrex storage license#Instant Brands continues to license the pyrex (lowercase) trademark for their tempered soda-lime glass line of kitchenware products and related accessories sold in the United States, South America, and Asia. No longer manufactures or markets consumer products, only industrial ones. Responsible for the development of PYREX spun off from its parent company as Corning Consumer Products Company, subsequently renamed Corelle Brands. In 1998, the products division of Corning Inc. It was later expanded to include ware products made of soda-lime glass and other materials. In 1915 for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware. Pyrex ( trademarked as PYREX and pyrex) is a brand introduced by Corning Inc. 1980, featuring graduations in both metric and U.S.
0 Comments
Leave a Reply. |
AuthorKrista ArchivesCategories |