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<p>[QUOTE=&quot;SuperDave, post: 2394883, member: 1892&quot;]You want to see what dip does to copper? OK.</p><p><br /></p><p>Before. These were heavily overlit to expose any detail at all; the coin was almost black:</p><p><br /></p><p>[ATTACH=full]492493[/ATTACH] </p><p><br /></p><p>[ATTACH=full]492495[/ATTACH] </p><p><br /></p><p>After. Mind, this set is scans, which do not show color with any effectiveness. You have no_idea how bright and putrid a color this coin became:</p><p><br /></p><p>[ATTACH=full]492496[/ATTACH] </p><p><br /></p><p>[ATTACH=full]492497[/ATTACH] </p><p><br /></p><p>That was ten years ago, when I was first learning what you could and couldn&#039;t do to copper. The coin still hasn&#039;t recovered yet, although I probably could (now) if I set my mind to it.</p><p><br /></p><p>If your definition of &quot;dip&quot; includes thiourea, just don&#039;t.[/QUOTE]</p><p><br /></p>

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