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<p>[QUOTE=&quot;GDJMSP, post: 8017137, member: 112&quot;]I don&#039;t know that they do test positive because as I have tried to explain in previous posts I have zero confidence in the Beilstein test to begin with.</p><p><br /></p><p>Also, you have to understand that there are a multitude of things that can cause a coin to discolor like the one you&#039;ve posted. And, that Zip-lock bags are not manufactured out of PVC and it&#039;s softening agents. They are made out of inert plastics. Bottom line, I don&#039;t think the Zip-lock bags have anything to do with what&#039;s going on with your coins. I think it is something else causing it, and the list of possibilities is pretty much endless.</p><p><br /></p><p>Is it possible I&#039;m wrong ? Sure, but I don&#039;t think I am.[/QUOTE]</p><p><br /></p>

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