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<p>[QUOTE=&quot;Roerbakmix, post: 4956140, member: 100731&quot;]Nr 7:</p><p>[ATTACH=full]1191345[/ATTACH] </p><p>This one was obviously difficult. The encrustation on the obverse was more than 1mm in thickness, and below the copper deposition was a thick layer of iron oxide which is very difficult to treat. In the end, all encrustations were gone, but at the cost of some minor pitting, mainly on the obverse. </p><p>Accidentally, the oxalic acid solution became too hot, and the coin became very dark-red, which was removed by gentle rubbing. </p><p><br /></p><p>Nr. 8:</p><p>[ATTACH=full]1191346[/ATTACH] </p><p>Fairly easy to clean. </p><p><br /></p><p>Nr. 9:</p><p>[ATTACH=full]1191347[/ATTACH] </p><p>The main problem with this coin was the thick deposition on the obverse, at te radiate crown. Overall, the coin was somewhat rough. </p><p><br /></p><p>Nr. 10:</p><p>[ATTACH=full]1191348[/ATTACH] </p><p>Not really happy how this one turned out, but I had to be careful, as the coin seemed very fragile.[/QUOTE]</p><p><br /></p>

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