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You need to pull a 0.06 ATM vacuum to freeze dry. Aquarium pumps don't even come close, and being able to generate 15 PSI at 1 ATM doesn't mean anything when generating a vacuum. Also, the food itself doesn't need to be cold, there needs to be a cold coil that pulls the moisture out of the air (it needs to be about -50ºC/-58ºF).
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Posted:Apr 3, 2009
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