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<p>[QUOTE=&quot;-jeffB, post: 2634392, member: 27832&quot;]I don&#039;t remember exactly where we left the &quot;agree to disagree&quot;-ment in the last thread about acetone, copper, and color changes. There&#039;s a chemical reaction that can occur, very slowly, in the presence of strong light. There&#039;s also the possibility that acetone can remove a layer of foreign material that was giving the coin a different color.</p><p><br /></p><p>I really need to start experimenting on some of the dirty, common Wheat cents I&#039;ve got lying around...[/QUOTE]</p><p><br /></p>

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