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<p>[QUOTE=&quot;-jeffB, post: 1078974, member: 27832&quot;]Hmm. I&#039;m seeing different things about PCGS and acetone.</p><p><br /></p><p>Here&#039;s one statement:</p><p><br /></p><p><a href="http://www.pcgs.com/secureplusfaq.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.pcgs.com/secureplusfaq.html" rel="nofollow">http://www.pcgs.com/secureplusfaq.html</a></p><p><br /></p><p><i><b>85. Q: Will acetone make our coins come back bagged for being dipped or altered or will it be OK?</b> </i></p><p><i>DW: This is not really a Secure Plus question.... acetone can sometimes be used to remove foreign material from the surfaces without ruining the coin.</i></p><p><br /></p><p>Here&#039;s another:</p><p><br /></p><p><a href="http://www.pcgs.com/articles/article_view.chtml?artid=6363&amp;universeid=313" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.pcgs.com/articles/article_view.chtml?artid=6363&amp;universeid=313" rel="nofollow">http://www.pcgs.com/articles/article_view.chtml?artid=6363&amp;universeid=313</a></p><p><br /></p><p><i>The PCGS Coin Sniffer uses dispersive X-ray spectrometry (EDX), Fournier Transform Infra-Red Spectral analysis (FT-IR), Raman Spectroscopy and other analytical techniques to detect the kinds of materials applied by so-called &quot;coin doctors&quot; to conceal problems with a coin or alter its surface to improve its appearance in an attempt to artificially increase the coin&#039;s value.</i></p><p><i><br /></i></p><p><i>Commonly used organic materials applied to coins include plastic resins such as Bondo, putty, caulk, wax, lacquer, varnish, acrylics, paint, ink, <b>acetone</b>, glue, and citric acid.</i></p><p><br /></p><p>If I had to guess, I would suppose that they&#039;re talking about treatments that involve acetone as a solvent for something else that&#039;s applied to the coin.</p><p><br /></p><p>The techniques PCGS is introducing are powerful enough to detect very low traces of substances. But acetone is <i>so</i> volatile that I find it hard to believe they would routinely detect it. And, as the first quote says, it&#039;s not automatic grounds for bagging anyhow.[/QUOTE]</p><p><br /></p>

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