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<p>[QUOTE=&quot;medoraman, post: 1038202, member: 26302&quot;]I agree with Doug. This coin has not seen electrolysis unless it was VERY short in duration. Electrolysis is only suited for coins that are effectively valueless and unknown without electrolysis, and cannot be cleaned any other way. In other words, you clean coins every way imaginable, and the slugs left over you can electrolyze, since they are goners anyway.</p><p><br /></p><p>This coin is dark maybe because of the olive oil. I am not a big fan of it because it darkens coins. I would put it in a pure water bath for a few weeks, changing the water every few days. This may lighten the coin a little, and may lessen the deposits. Its ok if it doesn&#039;t, since this coin is in good shape for a Parthian bronze. Just make sure you buy purified water and do not use tap water, since tap water contains chlorine which cn lead to bronze disease. Another cheap source of the water is the runoff from air conditioners, which in Iran I am sure you run often in the summer. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Btw, great to meet you Mani. I am a huge fan of your country and culture, having collected Sassanid coins many years. I wish more westerners knew the story of your great civilization.</p><p><br /></p><p>Chris</p><p><br /></p><p>EDIT: Just to clarify by &quot;pure&quot; water I mean distilled.[/QUOTE]</p><p><br /></p>

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