moisture on the coin
No matter what metal coins are made of, there are a number of general rules that must be observed when cleaning their surface from contamination.
In no case do not immediately dry-clean the coin. Their surface is usually not evenly polluted, and the reagent can react with the metal in areas where there is less dirt, while other areas will still need to be cleaned. Therefore, the mechanical cleaning of the coin is first applied.
To start this process will need water. Pay special attention to the fact that not all water is suitable for cleaning coins. Continue reading