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Author Topic: How to clean a roman coin ...  (Read 870 times)
jtalbot0001
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« on: September 06, 2020, 05:53:51 PM »

Hi All,

Does anyone know how to clean a Roman coin? Sorry my pics don't look great but I think you can see the orange encrustation on both sides. If it wasn't for that the coin I think is in very goo nick.

I have read about using olive oil (with maybe a little lemon juice?). Does this work? Also would you do that from cold, or warm the olive oil up a little?

Thanks, Jon


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N8
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« Reply #1 on: September 07, 2020, 01:13:25 PM »

Hi,

have a look at this link for Colchester Metal Detecting group, they give some tips on cleaning

http://www.colchestertreasurehunting.co.uk/C/cleaning.htm

cheers
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jtalbot0001
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« Reply #2 on: September 07, 2020, 06:39:48 PM »

Thanks N8,

I did take a look at that, haven't read it really as it seems that the examples they show are silver coins only.

My coin I am sure is a copper-alloy coin.

Jon
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probono
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« Reply #3 on: September 07, 2020, 10:56:15 PM »

If I was looking at this coin, there would be a number of considerations as to whether I would clean it or not.

Generally - as you have mentioned - for British found coppers, olive oil is about all I would use - and after any corrosion is loosened I would use something like a wooden tooth pick (basically something softer than the patina) to remove any loosened crud - and repeat this.

I know that Chef Geoff on here didn't like olive oil; some suggest mineral oil, but I've never had any luck with that.

For copper coins (if that is what it is) - then I'd pretty much leave it at that - any acid - even as mild as lemon juice might take off what looks like the iron staining, but would also take off the patina and could leave you with just a lump of copper with no details - or it might not - or it might leave you with some clean areas and lots of pits.

I could (and probably should) post some images on here of coins that have been cleaned successfully and those where they haven't.
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jtalbot0001
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« Reply #4 on: September 08, 2020, 08:11:29 PM »

Thanks for the reply.

Having a think about it, as it is covered up so much, I will go ahead with a soak in olive oil only.

What I will do first is, soak for a week in distilled water, then see what else comes off. Then I will soak for a week in olive oil, and see what comes off, and may repeat the process and see how much comes off. I will take good pictures, before and during, and see how I get on.

Although not very clear in the pics, there is enough legend for me to say this is an Allectus coin.

Wish me luck.

Jon
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probono
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« Reply #5 on: September 08, 2020, 11:44:24 PM »

I wish you luck Smiley
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