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Dirty Copper Coin Cleaning?

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First Page  Showing last 15 replies.
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New Member
Australia
40 Posts
 Posted 02/21/2018  03:26 am  Show Profile   Bookmark this reply Add aeromedic to your friends list
Thanks everyone. Will post photos when I work out how to fo this.
Pillar of the Community
Australia
599 Posts
 Posted 02/21/2018  03:42 am  Show Profile   Bookmark this reply Add echidna to your friends list
As per Stevo's advice WD40 generally works well on circulated bronze coins that have a buildup of gunk and/or verdigris.
Watch your top knot
Pillar of the Community
United Kingdom
2133 Posts
 Posted 02/21/2018  04:32 am  Show Profile   Bookmark this reply Add Pertinax to your friends list
Be very cautious when using acetone, in my experience it removes the patina.

Also, as I saw recently, it turned a 1949S cent in MS63 RD to MS63BN over the course of a couple of weeks.

Not a disaster for that coin but if you've got scarce mint condition coins with their original salmon-pink colour, it might be.
Pillar of the Community
Australia
908 Posts
 Posted 02/21/2018  05:25 am  Show Profile   Bookmark this reply Add stevo1962 to your friends list
What I was talking about was only soaking for 10 minutes or half an hour at most and keeping an eye on your coins during the process to save the patina
New Member
Australia
40 Posts
 Posted 02/21/2018  06:10 am  Show Profile   Bookmark this reply Add aeromedic to your friends list
Thanks everyone.
I'll post pics as doon as I can.
Valued Member
269 Posts
 Posted 02/21/2018  9:33 pm  Show Profile   Bookmark this reply Add CoinOS to your friends list
Distilled water
Reagent grade Acetone
Trisodium hydrogen carbonate
Xylene

- are all considered coin-safe but xylene is not human-friendly.

Acetone has low toxicity and won't poison you unless you have high exposure, however it's flash point flammability is something to be aware of.

I tried distilled water (coin suspended) in a ultrasonic bath and it was useless. Now I don't clean them.
New Member
Australia
40 Posts
 Posted 02/22/2018  06:00 am  Show Profile   Bookmark this reply Add aeromedic to your friends list
Here they are...


Dirty-Copper-Coin-Cleaning?
Dirty-Copper-Coin-Cleaning?
Pillar of the Community
Australia
599 Posts
 Posted 02/22/2018  07:30 am  Show Profile   Bookmark this reply Add echidna to your friends list
The 1919 is way too far gone.
The 46 looks OK as is.
Watch your top knot
Valued Member
269 Posts
 Posted 02/22/2018  07:36 am  Show Profile   Bookmark this reply Add CoinOS to your friends list
That 1919 has been at ground zero of quite a few atomic bomb blasts, but it's still a scarce coin.
New Member
Australia
40 Posts
 Posted 02/22/2018  07:44 am  Show Profile   Bookmark this reply Add aeromedic to your friends list
I do have some great coins in what I feel is "very fine" condition. I'm hoping that if I'm careful in the cleaning process, these will retain their value when I sell those that I don't need.
#128526;
Pillar of the Community
Australia
1040 Posts
 Posted 02/22/2018  5:24 pm  Show Profile   Bookmark this reply Add Basil to your friends list
I would soak the 1919 in Olive Oil for a few Months.

Any chance of a Pic. of the Obverse?
Edited by Basil
02/22/2018 5:24 pm
New Member
Australia
40 Posts
 Posted 02/23/2018  06:12 am  Show Profile   Bookmark this reply Add aeromedic to your friends list
Hope this helps.


Dirty-Copper-Coin-Cleaning?
New Member
Australia
40 Posts
 Posted 02/23/2018  06:46 am  Show Profile   Bookmark this reply Add aeromedic to your friends list
...and another.




Dirty-Copper-Coin-Cleaning?
Dirty-Copper-Coin-Cleaning?
Pillar of the Community
United States
3402 Posts
 Posted 02/23/2018  07:28 am  Show Profile   Bookmark this reply Add Kopper Ken to your friends list
You did a great job using these time proven techniques in conserving a coin that would have been a junker. I would continue with the Olive oil bath until all the verdigris is removed and then try a toothpick on the stubborn areas. After that leave it on the windowsill for a few weeks, turning every few days and the lightened areas should re-tone nicely.

KK
Pillar of the Community
Australia
1040 Posts
 Posted 02/24/2018  05:46 am  Show Profile   Bookmark this reply Add Basil to your friends list

Quote:
Hope this helps.


Thanks Aero,what a shame,great eg.of a 1919 DD before the green stuff started eating it away.
I had a similar one that was in a Tobacco Tin I purchased off ebay a few years back,genuine seller that actually found the Tin in his Fathers garage.
After a couple of Months in Olive Oil I stopped the Verdi.growing but the Coin was stuffed,heavily pitted under the Verdi.,unfortunately yours will probably be the same but you have to at least try to save it.
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