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<p>[QUOTE=&quot;foundinrolls, post: 703899, member: 4350&quot;]The coin was absolutely soaked in acid.&nbsp; A mild acid will not eat away the copper too quickly.&nbsp; In fact the zinc under the copper would be more effected by a mild acid than the copper.</p><p><br /></p><p>If you take a copper cent,&nbsp; and a copper-plated zinc cent and stick them in a small bowl of vinegar for a few days,&nbsp; you can get an idea of what an acid can do.</p><p><br /></p><p>Put some plastic wrap over the top of the bowl unless you really like the smell of vinegar<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>A stronger acid for a shorter period of time would create the effect seen above more quickly.</p><p><br /></p><p>Anyway...acid dipped for sure.[/QUOTE]</p><p><br /></p>

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