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<p>[QUOTE=&quot;tommyc03, post: 3034531, member: 17665&quot;]If there is a crack in the plating, the zinc becomes exposed to it&#039;s surrounding conditions. The zinc then starts to bleed out, exposing the surfaces of the good coins, beginning the zinc rot. I first noticed this on the edges of some of the coins after emptying them from the rolls. Further inspection showed zinc migrating to the surfaces in the fields on the obverse and reverse. Mine have all been stored properly with not too much humidity, heat, cold, etc. I can&#039;t tell you the chemical process but maybe someone here can. As Chris mentioned earlier, maybe the cheap styrene tubes are not a good idea. I&#039;m using the polypro square tubes and I&#039;m not sure if this will work long term either. The main object is to get the bad cents away from the good ones to begin with. A daunting task. In the end, I fear these will not last long in any environment. Most of the cents in my collection that are zinc have already toned so, I really do not see anything good coming long term from any of these. I&#039;m just glad I&#039;ve decided not to continue with my cent collection and just finishing up my ATB quarters and then I&#039;m done with modern issues.[/QUOTE]</p><p><br /></p>

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