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<p>[QUOTE=&quot;fusiafinch, post: 663338, member: 18382&quot;]<b>pete</b></p><p><br /></p><p>Pete,</p><p><br /></p><p>PVC or other plasticizers in flips makes the plastic very soft and pliable. Mylar, on the other hand, is stiff and does not bend easily. It&#039;s more brittle and it&#039;s possible to even cut yourself on the sharp corners. It&#039;s the stiffer, mylar flips that are safer for coins. If you look at Coin World or Amos Advantage, they offer the stiffer kind of flips for coins. One brand name is SaFlips.</p><p><br /></p><p>Regarding the cardboard holders, that&#039;s not as bad. If you have cardboard holders with clear mylar over the coin (usually stapled by a dealer), that&#039;s OK. The mylar will not damage the coin. </p><p><br /></p><p>Now, the cardboard is a different matter. If the cardboard has sulfer in it, over time, that could tone your coins as gases from the sulfer based product are released. In the old days, they even stored their coins in paper envelopes, and that toned the coins. It&#039;s actually a way of toning your coins intentionally.</p><p><br /></p><p>If you&#039;ve had the coins stored in these holders for 30 years and see no damage or changes to your coins, I wouldn&#039;t worry about it.[/QUOTE]</p><p><br /></p>

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