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Author Topic: Help to clean this Gallienus coin  (Read 273 times)

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Offline Rafael Augusto De Mattos F

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Help to clean this Gallienus coin
« on: September 29, 2022, 04:55:37 pm »
Hi guys, how can I "clean" this coin, removing this very hard malachite deposits on it? I think the coin is good below all this malachite... Thanks!


Offline SC

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    • A Handbook of Late Roman Bronze Coin Types 324-395.
Re: Help to clean this Gallienus coin
« Reply #1 on: September 30, 2022, 09:38:00 am »
Malachite will "pop" off with a scalpel if the underlying condition is right.

I have done this numerous times on silvered coins - you can see some examples in the "sticky" post about cleaning silvered Roman coins.

However, I don't know about the surface state of your coin.

Personally I would use a scalpel under magnification and clean some of the dirt encrustations off and also try to gently pop/lift off some of the malachite  - starting with small out of the way bit.  If it doesn't work you may have to leave the malachite.

SC
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