Late Roman Bronze Coins
Coin talk => Uncleaned => Topic started by: Per D on March 25, 2021, 05:24:56 AM
Apologies for the sophomoric pun.
Attacking some stubborn deposits on this follis with diluted phosphoric acid and a Q-tip was not only effective, but also resulted in (partial) restoring of the silvering, presumably through a process of surface depletion.
I won't experiment on other coins, but I wonder if anyone has had a similar experience.
/Per
Do you have a "before" photo for comparison ?
I forgot to take one myself, but here's the seller's photo.
the silvering was there always, just covered. Whenever you see these coins with similar green, it usually means silvering; though it doesn't mean that the surfaces will turn out nicely.
Thanks for your input, appreciated as always.
Do you have any ideas what would be a better/safer way to clean surfaces like this?
/Per
You can always use diluted lemon juice, I have a bag of powdered citric acid, so I can mix it up. You have to be very careful when using acids (and bases) to clean coins-- it's easy to mess up a coin.
Indeed!