The use of pure, or nearly pure lead for coins is unusual even in ancient times, because lead is really too soft to be used in a circulating coinage.
The Ishvanus of 3rd cent AD South India, the Guptas of Northern India, and the Khmer Kingdoms of Angkor issued lead coins. The Chinese also issued lead cash coins, but few of them have survived.
Generally speaking, the very thick patina that a lead coin can accumulate will protect the metal underneath, and that is why those that have survived from ancient times have managed to survive.
For this reason only remove as much of the patina that prevents the coin from being identified, by rubbing with a cotton cloth. Leave the rest of the patina for protection.
Edited by sel_69l
09/17/2019 07:13 am