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boilsover

boilsover

8 hours ago, JoNorvelleWalker said:

 

And they call soda-lime glass Pyrex.

 

 

The full story of what is/has been called Pyrex is long and boring.  Suffice it to say, at least in USA, Pyrex could always have been either soda lime or borosilicate--the US plants made both, although now all Pyrex under the World Kitchen license is soda lime.  So if you're buying new in USA, it's soda lime, and it's still Pyrex.  If you're buying vintage, you need some expertise to tell which it is.  If you want borosilicate, you can buy the European manufacture.  In both cases, it's a safety hazard, but soda lime more so.

boilsover

boilsover

8 hours ago, JoNorvelleWalker said:

 

And they call soda-lime glass Pyrex.

 

 

The full story of what is/has been called Pyrex is long and boring.  Suffice it to say, at least in USA, Pyrex could always have been either soda lime or borosilicate--the US plants made both, although now all Pyrex under the World Kitchen license is soda lime.  So if you're buying new, it's soda lime and it's still Pyrex.  If you're buying vintage, you need some expertise to tell which it is.  If you want borosilicate, you can buy the European manufacture.  In both cases, it's a safety hazard, but soda lime more so.

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