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<p>[QUOTE=&quot;gbroke, post: 1494708, member: 22585&quot;]You are correct in a way. Although &quot;damage&quot; isn&#039;t necessarily the proper term to use in every case.</p><p>&quot;Natural toning&quot; is caused due to the outer layer of the coin reacting with air, paper, heat, moisture or other types on environmental characteristics and storage venues.</p><p>Toning is very unpredictable and can be damaging or ugly from the time it starts. Especially if it happens too rapidly.</p><p><br /></p><p>&nbsp;Certainly some people will argue that any form of toning is damage (not the TPG&#039;s). However, when the toning produces beautiful colors and patterns, they will give a coin a premium value and are very desirable by toned collectors like myself.</p><p>When toning goes bad, and turns black, it is considered terminal. Meaning, at that point the toning has actually eaten away on the planchet and therefore has damaged the coin.</p><p><br /></p><p>Here are a couple threads I posted with examples of terminally toned coins and the need to dip them.</p><p><br /></p><p><a href="http://www.cointalk.com/t140858/" class="internalLink ProxyLink" data-proxy-href="http://www.cointalk.com/t140858/">http://www.cointalk.com/t140858/</a></p><p><a href="http://www.cointalk.com/t140858/" class="internalLink ProxyLink" data-proxy-href="http://www.cointalk.com/t140858/"><br /></a></p><p><a href="http://www.cointalk.com/t205567/" class="internalLink ProxyLink" data-proxy-href="http://www.cointalk.com/t205567/">http://www.cointalk.com/t205567/</a>[/QUOTE]</p><p><br /></p>

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