Numismatics is one of the most famous and ancient types of collectibles.
Numismatics (collecting coins and medals, including the study of money circulation and the history of…

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Medieval coins (ca. 500-1500)
Medieval coins (ca. 500-1500)The Middle Ages spanned 1,000 years of European history, starting with the…

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Numismatics Museum in Nicosia
The ancient Greeks attributed the invention to heroes of myths, and the Romans to their…

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European coins and medals (XVI-XXI century)
New time in numismatics begins in Europe around 1500 in the lands of the Habsburgs.…

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oxides connecting them

Cleaning of old coins

The purpose of this message is to acquaint interested readers with the most simple and safe methods of cleaning coins, which the author can recommend based on his many years of experience in the restoration of an archaeological metal at the State Hermitage Museum. Clearing coins is one of the crucial types of restoration, it is important for their study, dating, identification and storage. Ancient coins made of silver and copper alloys, found in treasures or in other archaeological excavations, most often enter the restoration workshop highly corroded, and sometimes completely mineralized. Under the action of water and salts, copper is destroyed in the soil to form green carbonates and chlorides, red cuprous oxide and black oxide. Continue reading