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<p>[QUOTE=&quot;7Jags, post: 4412847, member: 78719&quot;]OK, it is very safe, but possibly not if you just leave a low fineness gold piece in there.</p><p><br /></p><p>Anyway, here is one I just did 15 minutes ago:</p><p><br /></p><p>Host coin is 1969 Anguilla Ten Dollars proof, fineness 0.900</p><p><br /></p><p>Before:</p><p><br /></p><p>[ATTACH=full]1107927[/ATTACH]</p><p><br /></p><p>After:</p><p><br /></p><p>[ATTACH=full]1107928[/ATTACH]</p><p><br /></p><p>Couple pictures of &quot;procedure&quot;:</p><p>First is after microwaving, bowl plus water plus Sodium Bicarbonate, aluminum foil piece THEN added</p><p>Second is with coin in, spot facing UP - I don&#039;t think that makes a difference</p><p>[ATTACH=full]1107932[/ATTACH] [ATTACH=full]1107933[/ATTACH][/QUOTE]</p><p><br /></p>

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