Date: Fri May 7 15:34:44 1999
Posted By: Doug Holt, Faculty, Food Science and Human Nutrition, University of Missouri
Area of science: Microbiology
Yes, Ziploc bags are really very close to air-tight. Not completely, but
you have to wait a really long time for much oxygen to enter the bag.
Aluminum foil is certainly "light-tight" but it is very difficult to get a
seal that prevents air from entering the bag.
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