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<p>[QUOTE=&quot;SuperDave, post: 2272949, member: 1892&quot;]Um, the dip is what causes the red color....</p><p><br /></p><p>These coins are ruined. Hopefully they&#039;re just an inexpensive lesson regarding how not to treat collectible coins; you&#039;re far from the first to have learned this lesson the hard way.</p><p><br /></p><p>In numismatics, there is <i>cleaning</i> and there is <i>conservation</i>. The difference is - like everything else in numismatics - subjective, based on the goal of most effectively preserving the undamaged coin for posterity.</p><p><br /></p><p>Lesson #1 of <b>conservation</b>: Don&#039;t use dip on copper. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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