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<p>[QUOTE=&quot;desertgem, post: 4666537, member: 15199&quot;]Here is the original article as in Electrochimica Acta </p><p><br /></p><p>Electrochimica Acta 46 (2001) 2337 – 2342Photochemical breakdown of acetone on copperSanjay V. Kagwade, Clive R. Clayton *, Devicharan Chidambaram1,Gary P. HaladaDepartment of Material Science and Engineering,State Uni6ersity of New York at Stony Brook,Stony Brook,NY11794-2275,USAReceived 3 August 2000; received in revised form 25 November 2000.</p><p><br /></p><p>I can download it with my college account, but maybe not otherwise.</p><p><br /></p><p>I don&#039;t debate that their result occurred under their conditions. They used 99.9985% 0.1mm copper foil and scrubbed it with 240 grit SiC paper, rinsed with acetone and put into 15ml of acetone in a small beaker and the beaker put into a water bath, then that beaker was covered by an inverted beaker over it&nbsp; so water could produce a high humidity environment.&nbsp; An Al Ka line with energy of 1486.6 eVand 400 W was used as ambient light.They allowed the acetone to evaporate during the 18 hour process.</p><p><br /></p><p>I do not, and probably no collector would feel that the above was normal for the purpose of&nbsp; removing organic material from metallic coins. Imo, results may vary <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />&nbsp; Jim[/QUOTE]</p><p><br /></p>

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