On 7/31/2010 5:16 PM, joe lobocki wrote: Evacuated bags really still leave the enclosed material at atmospheric pressure. The problem would arise if you had a piece of plastic in actual hard vacuum and the plastics and volatiles would gradually sublime into the surrounding. All that vacuum packing should do is ensure a very tight fit of the plastic to the stored object. I'd worry more about the stuff you have trapped inside, and whether the vacuum plastic enclosure is acid free, or is nonreactive with what you have stored.

I doubt that;s a hard enough vacuum to do any harm.. I'd be more worried about static charges from the bags, actually. -tony