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<p>[QUOTE=&quot;joecoincollect, post: 2482355, member: 71338&quot;]Hello. I was taking out my Indian head cents from cardboard holders I put them in a few years ago. I am putting them now in a Dansco. They looked dark and dirty so I rolled a qtip with acetone over them. To my amazement, all of them gave off blue and/or light green verdigris on the qtip. I would never put them in there like that, so I&#039;m afraid it&#039;s the holders. My local shop sells these holders, 100 for three dollars, and I also get them at the long beach coin show. I can&#039;t tell the difference between them, and the ones I buy online are the same. I read another online forum and someone said its hard to find any info on these holders and most dealers don&#039;t even know what they are exactly made of. This person also said Mylar windows are clear when you look through them, PVC ones are murky. Others have said older holders may have PVC but most modern ones don&#039;t. What do you think? I have thousands of coins, mostly world coins, in these holders. Is it just these older IHCs that had verdigris already and worsened inside, or should I worry about all my coins?[/QUOTE]</p><p><br /></p>

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