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<p>[QUOTE=&quot;desertgem, post: 3494533, member: 15199&quot;]The manufacturer is well known, but there has to be a plasticizer for it to be flexible and clear vinyl. Commonly non-chlorinated vinyls (EVA, PEVA, PVA and PVB) is used for such. It is the chlorine in&nbsp; regular PVC flips that initiates the damage. Polyethylene Terephthalate ( Mylar) is the more protective cover&nbsp; and since it is usually&nbsp; priced higher , it should be used for the very expensive and perhaps better condition coins. Common coins, ones soon to be sold, shipping, etc, could be such non-chlorinated vinyl.&nbsp; IMO.&nbsp;&nbsp; IMO. Jim</p><p><br /></p><p>Welcome[/QUOTE]</p><p><br /></p>

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