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<p>[QUOTE=&quot;GDJMSP, post: 2266832, member: 112&quot;]While it is true that zip locks can add an extra layer of protection for coin storage, by doing that you are making things worse. The cardboard, even if coated, will still put off gasses. And by placing the coins in a bag with the cardboard, you are concentrating those gasses around the coins.</p><p><br /></p><p>And since plastic is air permeable, you will also be exposing any other coins stored in the same place to the gasses put off by the cardboard.[/QUOTE]</p><p><br /></p>

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