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<p>[QUOTE=&quot;mrbrklyn, post: 469490, member: 4381&quot;]<a href="http://www.coinworld.com/news/062507/bw_0625.asp" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.coinworld.com/news/062507/bw_0625.asp" rel="nofollow">http://www.coinworld.com/news/062507/bw_0625.asp</a></p><p><br /></p><p>Olive oil not just for cooking</p><p>Hobbyists use &#039;fruit juice&#039; to remove verdigris</p><p>posted 6/12/07</p><p>By Paul Gilkes</p><p>COIN WORLD Staff&nbsp; &nbsp;&nbsp; </p><p><br /></p><p>&nbsp;</p><p><br /></p><p>Olive oil has been used as a softening agent for ages to aid the removal of built-up verdigris or dirt accumulations on coins that are up to centuries old.</p><p><br /></p><p>Some collectors swear by it. Other collectors, and some conservators, swear at it, claiming the fatty acids that the olive oil contains can actually damage coins, particularly copper.</p><p><br /></p><p>Ironically, copper or copper alloy coins are usually the subject of the olive oil immersion process.</p><p><br /></p><p>Susan L. Maltby, a conservator at the University of Toronto in Canada and author of the Coin World column &quot;Preserving Collectibles,&quot; commented on the practice in her Nov. 24, 2003, column. </p><p><br /></p><p>.............</p><p><br /></p><p><br /></p><p>See the link for the rest of article.</p><p><br /></p><p>Ruben[/QUOTE]</p><p><br /></p>

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