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I got peeved with Corning the other day when I found out they let another company produce Pyrex-brand glass under license which is not borosilicate glass. The
by Wingman4l7 14y ago
I got peeved with Corning the other day when I found out they let another company produce Pyrex-brand glass under license which is not borosilicate glass. The whole point of Pyrex was resistance to heat, which you don't get with the cheaper soda-lime glass. At least I learned how to tell them apart (soda-lime has a blueish color, and borosilicate is clear).
- InclinedPlane 14y agoI didn't really appreciate the weaknesses of modern soda-lime "pyrex" until I tried to use a baking dish to steam my oven for baking bread (normally I use a cast iron pan). The pyrex instantly shattered into a gazillion pieces, which was tons of fun to clean up. In the future I plan on picking up proper borosilicate glass cookware (marinex appears to be one brand that makes such).
- js2 14y agoOnly in the US where Pyrex is made by World Kitchen. In Europe, Arc Internationl still uses borosilicate for Pyrex-brand glass. Also, FWIW, a popular US glass bakeware manufacturer claims tempered soda-lime glass is stronger while still as heat resistant as borosilicate: http://www.anchorhocking.com/Bakeware_Facts.html#BORSILICATE http://www.anchorhocking.com/Bakeware_Facts.html#BORSILICATE
- ak217 14y agoThat's really funny, because a glass baking form made by Anchor shattered in my oven recently, spraying the whole oven with glass shards, ruining my food, and making it a huge pain to clean up. So... as heat resistant as pyrex? Not in my experience.
- Wingman4l7 14y agoUnfortunately not true; the Pyrex I've seen sold in Australia is soda-lime glass as well.