this post was submitted on 05 Oct 2024
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Weird News - Things that make you go 'hmmm'
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Foil isn't air tight?
How are you making foil air tight?
Crimping and folding it around the edge of the pan or the foil itself. Foil can hold in the steam of a pan in the oven or a foil pack on a campfire, for practical purposes that's air tight. If you're trying to contain superheated helium then it's a different story.
Not air tight enough for extended storage purposes, too air tight for cooling in the fridge. It's all relative as your examples demonstrate.
Hm. I now wonder if it depends. But I don't wonder enough to do an experiment, lol