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<p>[QUOTE=&quot;GDJMSP, post: 3607218, member: 112&quot;]All I can say is this - every one I ever used it on turned blue - every one. I&#039;ve seen turn cents blue straight out of mint packaging, both Mint Sets and Proof Sets. And read countless reports from other collectors over many years of it turning their copper coins blue. And while I&#039;ve never submitted any myself, many others have had copper coins body bagged or detail graded by NGC and PCGS because MS70 turned them blue.</p><p><br /></p><p>Could all those coins have had something on them ? Yeah, I suppose so, but danged if I know what it could be that it would be on all of them. But in the end, would it matter if that&#039;s what the reason was or not ? To me, the only thing that matters is that it happened at all - not why it happened.[/QUOTE]</p><p><br /></p>

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