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Post #67: Ancient Coin Cleaning Help

 
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Valued Member
United States
189 Posts
 Posted 10/22/2020  4:10 pm Show Profile   Bookmark this topic Add twood89 to your friends list Get a Link to this Message
What is the best way to remove green spots from ancient copper coins?
Valued Member
United States
369 Posts
 Posted 10/22/2020  8:01 pm  Show Profile   Check Seeker55's eBay Listings Bookmark this reply Add Seeker55 to your friends list Get a Link to this Reply
The green spots are sometimes called "bronze disease." Here's an article with steps to address bronze disease.

https://www.forumancientcoins.com/n...ze%20Disease

The solution of mixed sodium carbonate (washing soda) with sodium bicarbonate (baking soda) in distilled water is easy and inexpensive to make and is a helpful soak to remove green corrosion and stop its progress. The soaking can be done for a few days at room temperature instead of the hot water method described.

Formula for sodium sesquicarbonate solution:
10.6 g of sodium carbonate (washing soda) and 8.4 g of sodium bicarbonate (baking soda) dissolved in 100 ml of distilled water
Valued Member
United States
189 Posts
 Posted 10/22/2020  8:02 pm  Show Profile   Bookmark this reply Add twood89 to your friends list Get a Link to this Reply
Thanks, I appreciate the help
Pillar of the Community
United States
752 Posts
 Posted 10/22/2020  9:24 pm  Show Profile   Bookmark this reply Add travelcoin to your friends list Get a Link to this Reply
I've used the method outlined in this site as well.
http://kevinscoins.ancients.info/BD...Disease.html
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