why do teabags swell up and get full of air when I’m pouring hot water onto them?

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why do teabags swell up and get full of air when I’m pouring hot water onto them?

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Anonymous 0 Comments

The water on the top of the bag makes a bubble. Then the air between the leaves is forced to the top as the leaves get wet. The water isnt sealed in but it also can’t easily get out so it floats until you squish it

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