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<p>[QUOTE=&quot;borgovan, post: 887798, member: 13016&quot;]No. The toning wouldn&#039;t diminish on it&#039;s own. You could get rid of a substantial portion of it by &quot;dipping&quot; (cleaning using chemicals.) That method would remove the ultra-thin layers that have built up on the surface of the coin that are responsible for the toning.</p><p>&nbsp;</p><p>Toning, on its own, only moves in one direction; that is, it gets heavier. If the coin in the photograph were exposed to the elements, it would eventually turn black. The toning progresses in the colors of the rainbow: Red, orange, yellow, green, and blue. These colors correspond to layers of different thicknesses on the surface of the coin. When the layers become thick enough, the color is a nasty black.[/QUOTE]</p><p><br /></p>

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