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  2. CorningWare - Wikipedia

    en.wikipedia.org/wiki/CorningWare

    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.

  3. Made in USA? Buyers of Chinese-Made Pyrex Getting Refunds - AOL

    www.aol.com/owners-pyrex-measuring-cups-may...

    Not Really Made in USA. Pyrex is in a lot of hot water — pun intended. Instant Brands, the maker of heat-safe Pyrex glass cookware and measuring cups, misrepresented where one of its products ...

  4. Pyrex - Wikipedia

    en.wikipedia.org/wiki/Pyrex

    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 ...

  5. 10 Vintage Pyrex Bowls Worth Serious Cash - AOL

    www.aol.com/10-vintage-pyrex-bowls-worth...

    Read more The post 10 Vintage Pyrex Bowls Worth Serious Cas Featuring quirky and vibrant patterns, vintage Pyrex is experiencing a resurgence in popularity, especially among collectors who cherish ...

  6. Borosilicate glass - Wikipedia

    en.wikipedia.org/wiki/Borosilicate_glass

    After Corning Glass Works introduced Pyrex in 1915, the name became synonymous with borosilicate glass in the English-speaking world (since the 1940s, a sizable portion of glass produced under the Pyrex brand has also been made of soda–lime glass). Borosilicate glass is the name of a glass family with various members tailored to completely ...

  7. Fire-King - Wikipedia

    en.wikipedia.org/wiki/Fire-King

    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 ]