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<p>[QUOTE=&quot;SPP Ottawa, post: 1506266, member: 39508&quot;]I didn&#039;t say that other metals were immune to attack, but they certainly can survive longer in PVC flips, like a dealer&#039;s inventory, than copper-based coinage. I recently bought a collection of nickel-only struck coins, that had resided in PVC flips for almost 35 years (the old Coindex boxes and flips). True, there was a thin green film on some of the coins, but a simple rinse in acetone and the nickel coins were perfectly fine, with no permanent damage. I probably would have cried if this particular collector had Victorian or Edwardian Canadian silver 50c coins or something in those old Coindex flips.</p><p><br /></p><p>I certainly don&#039;t support using PVC flips; my personal preference is mylar 2x2 flips.[/QUOTE]</p><p><br /></p>

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