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<p>[QUOTE=&quot;Just Carl, post: 420411, member: 4552&quot;]I&#039;ve been putting coins in Whitman Classic Albums and then in plastic bags for probably 30 or 40 or 50 years now. At my age not sure when. Eventually Zip lock bags were invented so I started putting all my Albums in those. I also place proof and uncirc sets in those as well as many other coins. I push out as much air as possible prior to closing them. I&#039;ve never had a coin tone, tarnish, tint, corrode, etc using this process. Many years ago I contacted many plastic food container manufacturers and they all stated there is NO PVC in any of their products. Look at the lables and use the internet to find their email or phone numbers and check your self. If air or other gasses can not get to a coin, nothing will happen to that coin. If a coin is sealed in a slab and starts to change in any way at all, there is a leak in that slab. If a coin in a slab starts to change you can just place it in water to see if it bubbles. If it bubbles there is a leak. If not you&#039;ve got nothing to lose since water will not hurt the plastic.[/QUOTE]</p><p><br /></p>

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