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<p>[QUOTE=&quot;GDJMSP, post: 315865, member: 112&quot;]If a coin has been dipped properly, you can&#039;t tell if it has been dipped except by common sense and reasoning - even with an in hand examination. But with copper that rule doesn&#039;t always apply. Copper is a weird metal, it does strange things when it comes into contact with chemicals. It can turn all sorts of colors, sometimes right away and sometimes years later.</p><p><br /></p><p>And that is something else that enters into the question - time. Often when a person says that a coin looks like it was dipped they automatically assume that it was dipped recently. But it might have been dipped 20, 30 even 50 years ago. And with time comes change, it is inevitable. So there is no good answer to your question really. </p><p><br /></p><p>But an improperly dipped coin, can be identified almost immediately once you have the experience to know what to look for. And it can be several things from residue left behind to a lack of luster. Or it can be dark areas in the recesses, spots on the fields or a complete lack of toning where there should be toning based on the condition of the coin. It&#039;s really one of those things that you know it when you see it but it&#039;s hard to describe.[/QUOTE]</p><p><br /></p>

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