How long do I enjoy to move my hermetically sealed envelope contained by the freezer until it unseals itself?

I read in a recent Popular Science magazine that you can unseal an envelope surrounded by the freezer, but I don't recall how long it would appropriate for it to pop back instigate. Anyone know the time it would take?


Answers:    Never hear of that one . Be glad to know myself .
Much quicker and easier to steam it open. It really does work.
Do it compassionately and keep conducting tests it with a butter stick until it gives.
Should steal about a minute or so.
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