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<p>[QUOTE=&quot;Insider, post: 2558109, member: 24314&quot;]OLD POST&#039;S NEVER DIE nor either fade away...<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie50" alt=":happy:" unselectable="on" unselectable="on" /></p><p><br /></p><p><br /></p><p><br /></p><p><span style="color: rgb(0, 0, 179)">I posted earlier that this type of <span style="color: rgb(0, 179, 0)">green</span> residue on gold is not considered verdigris.&nbsp; It is very easy to remove when it is not hard and crusty covering a dark spot on the coin.</span></p><p><span style="color: rgb(0, 0, 179)"><br /></span></p><p><span style="color: rgb(0, 0, 179)">The bottom photo show a similar residue on a gold coin.&nbsp; Near the rim over the top of the &quot;A&quot; you&#039;ll see some <span style="color: rgb(0, 179, 0)">green</span> debris.&nbsp;&nbsp; Right next to it is a dark black spot.&nbsp; The middle photo shows the pointed tip of a wooden toothpick I&#039;ll use to &quot;push&quot; away the debris.&nbsp; The top photo is the finished job.</span></p><p><span style="color: rgb(0, 0, 179)"><br /></span></p><p><span style="color: rgb(0, 0, 179)">These are the important points I wish to make:</span></p><p><br /></p><p><span style="color: rgb(0, 0, 179)">1. The <span style="color: rgb(0, 179, 0)">green</span> on the Indian is similar and from the same cause; however it is more &quot;liquid&quot; than the <span style="color: rgb(0, 179, 0)">green</span> I removed which is dry and soft. Both come off very easily.&nbsp; </span></p><p><span style="color: rgb(0, 0, 179)"><br /></span></p><p><span style="color: rgb(0, 0, 179)">2. The black spot on the coin will come off too using a different method.&nbsp; It is debris struck into the surface.&nbsp; Very often, this type of spot will be covered with a tiny <span style="color: rgb(0, 179, 0)">green</span> residue.</span></p><p><span style="color: rgb(0, 0, 179)"><br /></span></p><p><span style="color: rgb(0, 0, 179)">3. When copper is near the coin&#039;s surface, it produces a brownish red stain around the spot.&nbsp; These stains can be associated with the same type of hard/soft <span style="color: rgb(0, 179, 0)">green</span> residue.&nbsp; </span></p><p><span style="color: rgb(0, 0, 179)"><br /></span></p><p><span style="color: rgb(0, 0, 179)">If one of our chemists wishes to post the chemistry of spotting on gold and the types of dry or liquid <span style="color: rgb(0, 179, 0)">green</span> residues, please chime in!&nbsp; Otherwise, it is probably on the Internet.</span></p><p><br /></p><p><img src="https://www.cointalk.com/attachments/img_0753-jpg.548005/" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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