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Warning: Skipping the pre-heat step on borosilicate has never caused a crack for me, but try telling that to the old-timers.
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ray4286mo ago
Look, I get wanting to save time, but borosilicate can still thermal shock if you're not careful. The risk isn't about guaranteed cracks every single time, it's about those weak spots you can't even see. You might get away with it for a while, then one day a piece you put real work into just goes. It's not worth the gamble for the five minutes of patience it takes to pre-heat properly.
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margaret_flores175mo ago
Totally reminds me of what @sage787 said about that roasting pan. My aunt had a fancy casserole dish that survived a decade of abuse until it just gave up during a regular Tuesday dinner. Glass is weird like that.
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sage7876mo ago
Remember hearing about a guy who kept putting hot pans straight into cold water, said it was fine for years. Then one Thanksgiving his favorite roasting pan just split in half, right down a hairline crack he never saw. That's the exact vibe @ray428 is talking about. It's not about the glass being weak, it's about that one time you're not lucky. The small stress you don't see builds up until it finds its moment. Saving a few minutes isn't worth losing something you spent hours on.
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