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<p>[QUOTE=&quot;silverbug, post: 874686, member: 24906&quot;]OK thanks for all the replies. Are we talking 100% acetone or diluted? I work in a lab and the 100% stuff scares me. I tried to dilute it once and it started fuming on me! I have some isopropyl alcohol on hand, and that works nicely when I tested it. Is there any reason for using acetone or will any organic solvent do?</p><p><br /></p><p>@rdwarrior You&#039;re right, the 1921 coins contain .5 silver, 0.45 copper and 0.05 manganese. I read somewhere that that didn&#039;t turn out so well so they changed it pretty quickly.<u></u></p><p><u></u>[/QUOTE]</p><p><br /></p>

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