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"Pyrex" is a brand name and is manufactured by Corning and is often different glass for different applications.

Most commonly, Pyrex is a "borosilicate" glass. The first borosilicate glass was developed by Otto Schott in Germany and was called Duran. Other brandnames from around the world include Simax, Chinex, Kimble ...

Glasses are known by their flux, a component which lowers the melting temperature of the silica sand which makes the glass, hence the name borosilicate denotes that the flux used is boron.

So, basically, Pyrex is made from silica sand, boron (borax or boric acid), stabilising agents and decolourants as well as some other, minor ingredients.

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12y ago

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Is All glass made from Pyrex?

No, not all glass is made from Pyrex. Pyrex is a brand name for a type of borosilicate glass that is known for its durability and resistance to thermal shock. There are many other types of glass with different compositions and properties used for various applications.


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How does pyrex dishes works?

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Pyrex changed its glass formula in 1998 from borosilicate to tempered soda-lime glass.


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