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<p>[QUOTE=&quot;GDJMSP, post: 1793704, member: 112&quot;]Doctored and restored are completely different things. And there are many different types of doctoring, and many different types of restoration. </p><p>&nbsp;</p><p>The terms restored, restoration, conserved, conservation, and yes cleaning - they are all synonyms - by definition mean that the coin was returned to its original state without leaving any traces of that conservation or restoration. And original state does not mean freshly minted,it only means that contaminants and/or toning were removed from the coin, but not necessarily both were removed. For example, you can rinse, clean, wash a coin in acetone, distilled water, or xylene, and no traces of those chemicals will remain on the coin. You can even dip a coin in a commercial coin dip and no traces of that dip will remain on the coin. Coins treated in this way have been conserved, restored, cleaned.</p><p>&nbsp;</p><p>That said, the PCGS sniffer can and will detect some types of doctoring, but only some types of doctoring and definitely not all of them. Basically the only thing the PCGS sniffer is capable of doing is detecting traces of elements on a coin that are not supposed to be there on the coin. Examples of the kind of things that the sniffer can detect would be putty that is used to fill in contact marks, scratches and the like on the surface of the coin. It can also detect traces of oils, soaps, and some toning chemicals that are left behind on the coin by doctoring.</p><p>&nbsp;</p><p>Simply put, as I said above, the only thing the PCGS sniffer is capable of doing is detecting traces of elements on a coin that are not supposed to be there on the coin. And that is the only thing it can do.</p><p>&nbsp;</p><p>No, the PCGS sniffer <u>cannot and will not</u> detect that acetone, distilled water, xylene, or commercial dips, and some other solvents, were used on a coin. NGC and PCGS won&#039;t tell us exactly what they use to &quot;conserve or restore&quot; coins, but whatever it is that they use it leaves no traces on the coin. So the sniffer cannot detect anything because there is nothing there to detect.[/QUOTE]</p><p><br /></p>

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