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Guitar slide made of borosilicate glass. Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10 −6 K −1 at 20 °C), making them more resistant to thermal shock than any other common glass.
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 ...
In December 2008, the Pyroceram-based line of CorningWare was reintroduced in the US as CorningWare StoveTop. It is only manufactured in France at one of the few factories in the world still manufacturing vitroceramic cookware. One of the benefits of modern Pyroceram production is the ability to manufacture cookware without the use of arsenic.
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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 Pyrex borosilicate glass measuring cup Borosilicate glasses (e.g. Pyrex , Duran ) typically contain 5–13% boron trioxide (B 2 O 3 ). [ 75 ] Borosilicate glasses have fairly low coefficients of thermal expansion (7740 Pyrex CTE is 3.25 × 10 −6 /°C [ 78 ] as compared to about 9 × 10 −6 /°C for a typical soda–lime glass [ 79 ] ).
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