Repatinate Bronze Coins - Coin Community Forum

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Author	Replies: 5 / Views: 2,929
Pavlos New Member Netherlands 6 Posts	Posted 09/11/2018 2:32 pm Hello there, I got 2 bronze coins which I had to treat for pretty bad bronze disease and I had no choice but to use 5% Sodium sesquicarbonate solution. This unfortunately stripped a part of the patina, some spots still have patina and other spots are stripped till the bronze metal, very unfortunate. Now I would like to repatinate them to their original color, both had a really nice brownish colored patina. I was wondering what methods there are to repatinate the coins back to their brown color? I found 2 methods, one is putting it in the oven, is this recommended? Another method I found is with liver of sulphur, I only read that it needs to be diluted a lot because it can turn copper all the way to black, which I absolutely do not want to have. Suggestions are appreciated a lot! Thank you. Report this Post to the Staff

echizento Moderator United States 23731 Posts	Posted 09/11/2018 3:15 pm Not something I've ever done, I have found a few sites on Google that may help. Just do a search there. Report this Post to the Staff
oriole Pillar of the Community Canada 5253 Posts	Posted 09/11/2018 6:03 pm I have used the oven method. I actually used a stove heating element on low setting. It may take some time. It never looks quite the same, or like real patination, but it is better than bare copper. If the coins is otherwise kind of ruined, it can hardly do any harm. Report this Post to the Staff
gtkwml Valued Member United States 224 Posts	Posted 09/11/2018 7:49 pm Never tried these, but I guess okay if the coin is already damaged: https://www.ebay.com/itm/Historical...!14423!US!-1 https://www.ebay.com/itm/4-oz-Jar-J...!14423!US!-1 https://www.ebay.com/itm/COPPER-COI...!14423!US!-1 Report this Post to the Staff
Claudius Valued Member Canada 66 Posts	Posted 09/15/2018 7:43 pm Hi Pavlos... I have done this on one coin. It had very bad bronze disease and I was able to cure that - but yes the coin was stripped. I do not ever plan on selling the coin - I just wanted the coin to look a little better (as it was previously) in my collection - not trying to fool or scam anyone. It is a coin of Agrippa - I was so sad that this happened to such a fine coin that I was willing to do anything to save it. I purchased this product for $12. It worked amazingly well. I am so very glad to still be able to hold this coin in my hand.. if you are in a similar situation I highly recommend this as an option: https://nobleromancoins.com/product...5c1c0b78e1fe Report this Post to the Staff
travelcoin Pillar of the Community United States 1120 Posts	Posted 09/17/2018 2:13 pm I treated some coins for bronze disease and they all came back darkened. I really liked the color after the treatment. This is the method I used: http://kevinscoins.ancients.info/BD...Disease.html Then I baked it at 200 degrees for about 20 minutes BEFORE AFTER Report this Post to the Staff
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