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<p>[QUOTE=&quot;Roerbakmix, post: 3820447, member: 100731&quot;]Thanks all for the comments. I rather enjoy doing this, and sharing it is part of the fun, given these reactions. </p><p><br /></p><p>Sure, here it is. I don&#039;t have the photo of the horn silver all gone, unfortunately, and the coin has been sold already (it was bought as a proof of principle and sold as a nice denarius of Sev Alex <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> )</p><p>[ATTACH=full]1017227[/ATTACH] </p><p>The changes in colour are due to the lighting. As you can see, at the chin is a somewhat rough layer. With this type of horn silver, it&#039;s difficult to predict what&#039;s under it, and this came as a suprise. It&#039;s more visible on photo than &#039;in hand&#039;, but still ... </p><p><br /></p><p><br /></p><p>Yes, I do think that. EDTA is an acid (Ethylenediaminetetraacetic acid), and has no specific action towards the chlorides (or bromides) that constitutes to horn silver: in mainly just disolves the silver in the AgCl. Furthermore, it dissolves copper which may cause pitting. Sodium thiosulphate only &#039;targets&#039; the chloride / bromide. </p><p><br /></p><p><br /></p><p>Thanks ... will it ever be finished <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /></p><p>[/QUOTE]</p><p><br /></p>

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