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<p>[QUOTE=&quot;RickieB, post: 313989, member: 2486&quot;]Hello Carl...</p><p><br /></p><p>Nothing personal, but I beg to differ with that. Have you ever looked at a baggie under a 500x microscope?</p><p>Well Sir, gas as we know it (air) is composed of ~ 80 N2 and 20% O2 . Gas penetration through a plastic bag is very real and is a continious occurence. Just think about the plastic medical grade bags used in ionic exchange. Just becaues your coins have not turned yet does not mean that gas is not moving in and out of your baggie. Think about balloons for example filled with (He or Air) if they were not permeable they would never deflate. Gas permeation is a matter we deal with all the time in BioPharmaceuticals.Plastics are made with hydrocarbons and combined with off gas particulates from other solvents and compounds is sure fire bad news in the long term.</p><p><br /></p><p>Best regards,</p><p><br /></p><p>RickieB </p><p><br /></p><p><br /></p><p>Have a great day...</p><p><br /></p><p>RickieB[/QUOTE]</p><p><br /></p>

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