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Superfest glass (en.wikipedia.org)

submitted 2 months ago by [email protected] to c/[email protected]

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[–] [email protected] 6 points 2 months ago (2 children)

Also has led to a vibrant market for old Pyrex, made with borosilicate before they switched to soda-lime. Borosilicate is generally much more resistant to thermal shock (though there are some advantages to soda lime, but the big reason is that it's cheaper)

[–] [email protected] 4 points 2 months ago

I discovered the difference the hard way in college when I shattered a pyrex measuring cup by pouring boiling water into it. Four cups of boiling water and glass shards everywhere!

[–] [email protected] 2 points 2 months ago

Look for PYREX, not pyrex. They switched over in the 1990s, but sometimes you can get lucky at thrift stores.