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<p>[QUOTE=&quot;Insider, post: 4853668, member: 24314&quot;]GDJMSP, posted: &quot;If he has any, I&#039;m all for him posting some. But thing about corrosion is, unless it&#039;s a unique or unusual situation like the subject of this thread, it&#039;s usually all pretty similar. The degree will vary a good bit from coin to coin of course, but nothing that I&#039;m aware of, or can think of right off, has any particular pattern or identifying characteristics that could be used to say it was due to this or that. And <b><span style="color: #660000">there&#039;s more things than any of us wanna count that can cause corrosion.</span></b></p><p><br /></p><p>And since PVC residue is completely random in its formation, and since time plays such a huge part with that particular kind of corrosion, it&#039;s pretty much gonna be all over the map with different looks.&quot; </p><p><br /></p><p>physics-fan3.14, asked: &quot;Insider, I&#039;m very curious - do you have any pictures of what late-stage PVC corrosion looks like? We always say that PVC can eat into the surface of the coin, but I&#039;m not sure the actual results (after removing the PVC) are well known. If you have the pics, that would make an excellent new thread.&quot;</p><p><br /></p><p><span style="color: #0000b3">I don&#039;t think PVC has much to do with the terminal, black, oxidation products resulting in my images. <b> PVC does not seem to destroy the surfaces as deeply leaving more like a thin gray etched surface coating.&nbsp; </b>I&#039;ll need to hunt up an image or take a before and after of the next coin I conserve. </span>[/QUOTE]</p><p><br /></p>

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