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<p>[QUOTE=&quot;Vess1, post: 487495, member: 13650&quot;]Here&#039;s a PCGS article from 2000.&nbsp;&nbsp; Mainly the middle of the article to the end focuses on AT.&nbsp; They seem to have a good understanding of it but admit that some AT coins do get through.</p><p><br /></p><p><a href="http://www.pcgs.com/articles/article2316.chtml" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.pcgs.com/articles/article2316.chtml" rel="nofollow">http://www.pcgs.com/articles/article2316.chtml</a></p><p><br /></p><p>&nbsp;[FONT=arial,helvetica]<font size="2">[FONT=arial,helvetica]<font size="2">[FONT=arial,helvetica]<font size="2">&quot; <b>Chemicals, such as sulfur compounds, often result in &quot;crayon&quot; colors as opposed to more natural-looking greens, blues, reds, and yellows. Also, these &quot;artificial&quot; colors often do not blend as evenly as do original colors. When the colors are splotchy or uneven, there is a good chance Mother Nature did not cause them. Regardless of the process used, when the colors &quot;float,&quot; have unusual lines, and are uneven, the coin is probably artificially enhanced.</b>&quot;</font>[/FONT]</font>[/FONT]</font>[/FONT][/QUOTE]</p><p><br /></p>

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