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<p>[QUOTE="Insider, post: 4959239, member: 24314"]Most of the damage when removing PVC (that has not etched the surface yet) is done with the Q-tip or drying the coin.</p><p><br /></p><p>jeffB, posted: "There are knowledgeable people here who swear that they've seen acetone discolor copper coins. There are other knowledgeable people here who swear that's not possible (except under certain contrived conditions), and that those coins must have had some other deposit that the acetone removed, exposing the undesirable color underneath."</p><p><br /></p><p>AFAIK there is no way to tell if a copper coin will turn blue or not when acetone is applied. Some turn and some don't.</p><p><br /></p><p>As for those <b>knowledgeable copper specialists</b> who believe that when the acetone removes a surface substance it reveals the blue color of the underlying surface...SELF EDIT.</p><p><br /></p><p>Just to be very clear: Acetone may change the color of a copper coin or it may not. If the color is changed, it can be easily reversed.[/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 4959239, member: 24314"]Most of the damage when removing PVC (that has not etched the surface yet) is done with the Q-tip or drying the coin. jeffB, posted: "There are knowledgeable people here who swear that they've seen acetone discolor copper coins. There are other knowledgeable people here who swear that's not possible (except under certain contrived conditions), and that those coins must have had some other deposit that the acetone removed, exposing the undesirable color underneath." AFAIK there is no way to tell if a copper coin will turn blue or not when acetone is applied. Some turn and some don't. As for those [B]knowledgeable copper specialists[/B] who believe that when the acetone removes a surface substance it reveals the blue color of the underlying surface...SELF EDIT. Just to be very clear: Acetone may change the color of a copper coin or it may not. If the color is changed, it can be easily reversed.[/QUOTE]
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