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<p>[QUOTE=&quot;desertgem, post: 501805, member: 15199&quot;]FG, neither did I until the article was quoted. I am sure it was RLM that posted it. I was happy to know about it as it is an easy thing to do. The only factor that was mentioned as detrimental was the ambient light. First, I was surprised as ambient light over that amount of time includes a period of artificial light I am sure. The article doesn&#039;t refer to coins, but to copper foil being degreased by acetone and similar.</p><p><a href="http://www.sunysb.edu/vescalab/research/research7.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.sunysb.edu/vescalab/research/research7.html" rel="nofollow">http://www.sunysb.edu/vescalab/research/research7.html</a></p><p><br /></p><p>You could just wrap black electrician tape around the outside of a clear glass container with a lid for the acetone. Also a &quot;local &quot; pharmacy might be willing to sell a dark ointment jar for the purpose.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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