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<p>[QUOTE=&quot;desertgem, post: 2153153, member: 15199&quot;]1. Any plastic used for food storage, including zip lock type of bags is not supposed to have any PVC.</p><p><br /></p><p>2. the thicker the plastic, the less gaseous compounds that can get into the bag. Use heavy duty freezer bags, double zippers best.</p><p><br /></p><p>3. Intercept products are copper ions embedded in polymer material that react with mainly sulfur compounds in the air. That is great, but it is very difficult to know when to change them as they can not be regenerated easily. </p><p><br /></p><p>I think your best bet is to use 2 of the zip lock bags mentioned above , one inside the other.&nbsp; get a roll of new shiny cents at the bank, check for any errors or varieties ( I doubt that will be the case, but it prevents the remarks from addicts) and then scrub with a wire brush or plastic scrubber until bright and scratched ( not into the zinc layer though), dip in acetone, allow to dry, and throw them into the bags. As long as they stay bright and red, your coins are safe. When they start to change ( red-brown), either be cheap and re-treat with the scrubber, or spend them and make some new ones. The 100% scratched ( more surface area) copper layer will be more reactive than the coins and will be sentries to corrosion. 99cent store zip locks are too thin I have found and only recommend the &quot;Ziploc&quot; brand, which come large enough for albums also ( Amazon).</p><p><br /></p><p>They don&#039;t &#039;look&#039; as snazzy as commercial products, so you might want to limit them to your bulk coin storage. They don&#039;t help if you don&#039;t check them every few months.[/QUOTE]</p><p><br /></p>

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