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Pyrex (trademarked as PYREX and pyrex) is a brand introduced by Corning Inc. in 1915, initially for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware. It was later expanded in the 1930s to include kitchenware products made of soda–lime glass and other materials. [1]
In 1915, Corning created an improved heat resistant glass formula and launched Pyrex, the first-ever consumer cooking products made with temperature-resistant glass, in 1915. [ 13 ] The California Institute of Technology 's 200-inch (5.1 m) telescope mirror at Palomar Observatory was cast by Corning during 1934–1936, out of low expansion ...
The lids of CorningWare are typically made of Pyrex. Though some early lids were made of Pyroceram, most subsequent covers have been made of borosilicate or tempered soda-lime glass. Unlike the cookware, these lids have a lower tolerance for thermal shock and cannot be used under direct heat.
Pyrex sold glass measuring cups that the company claimed were made in the U.S., but were instead made in China. Now consumers are getting refunds.
Today, the online market for Pyrex dishes is booming. A quick Instagram search of the hashtag #pyrexforsale reveals nearly 18,000 posts of colorful, vintage glassware available for purchase.
Visions is made of a transparent version of Pyroceram glass-ceramic, occasionally referred to as Calexium. However, its lids have typically been made out of Pyrex (both Borosilicate and Soda-lime glass) in the US and Asia. Originally introduced in an amber color, a cranberry tinted version was available from 1992 until 2004.
The site of Kopia, in Uttar Pradesh, is the first site in India to locally manufacture glass, with items dating between the 7th century BCE to the 2nd century CE. [27] Early Indian glass of this period was likely made locally, as they differ significantly in chemical composition when compared to Babylonian, Roman and Chinese glass. [26]
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