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Treasure Hunting
Cleaning Your Finds
Cleaning modern coins. Decimals.
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<blockquote data-quote="user 1769" data-source="post: 220206" data-attributes="member: 1769"><p>Hi Trev,</p><p></p><p>From what I read on your original post, I'd say use the same solution, if it works. I reckon the coins turned green again after cleaning because they still had some acid clinging to them (acetic acid from vinegar, and the green would probably be copper acetate). They might be more stable if you neutralised them in a dilute bicarb solution overnight.</p><p></p><p>When I've been cleaning nuggets in any acid, I neutralise them in bicarb for a couple of days, then soak them in tap water for another day or so to remove any residues. The same should apply to modern coins.</p></blockquote><p></p>
[QUOTE="user 1769, post: 220206, member: 1769"] Hi Trev, From what I read on your original post, I'd say use the same solution, if it works. I reckon the coins turned green again after cleaning because they still had some acid clinging to them (acetic acid from vinegar, and the green would probably be copper acetate). They might be more stable if you neutralised them in a dilute bicarb solution overnight. When I've been cleaning nuggets in any acid, I neutralise them in bicarb for a couple of days, then soak them in tap water for another day or so to remove any residues. The same should apply to modern coins. [/QUOTE]
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Treasure Hunting
Cleaning Your Finds
Cleaning modern coins. Decimals.
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