FORVM`s Classical Numismatics Discussion Board
Numismatic and History Discussion Forums => Uncleaned Ancient Coin Discussion Forum => Topic started by: karaya75 on April 04, 2021, 01:58:13 pm
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i have this coin full off encrustations, very hard to remove. how can i remove it?
thank you
(https://i.imgur.com/0Dngl3e.jpg)
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do you know the emperor and silver level? Is it silver or billon?
If it's indeed reasonable purity silver, have you tried some lemon juice on a Q-tip?
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hello
its a gordianos 3
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Get some formic acid.Dilute to around 10-20 % .The acid will dissolve this incrustations.But monitor the coin,1-2 hrs and should be ready.
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Personally, I would go gentler and use Ron's lemon juice, or vinegar, applied via q-tip. This may soften the green to the point that a fingernail or bamboo skewer will remove some.
I wouldn't go harsher until that technique, or even leaving drops of lemon juice or vinegar on the green for a few minutes, had proved to not work.
SC
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me and my harshness never uses cotton on silver but it's all a matter of opinion anyway
my first approach would be to soak it - in DW - for a long time and see how that materializes with short lemon juice baths in between
that should really put a dent in that gunk
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I'm rather hoping to OP didn't just fly in to get advice and vanish. It's much more polite when some feedback comes after he tries a few things.