COIN NOT ON POCKET
This coin really can not afford neither in size nor in weight. She appeared in the reign of Catherine I. True, her institution was not original. In the first half…

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Valuable little thing. How to make money on investing in rare coins
Rare coins can grow in price by hundreds of percent over ten years. What influences their value and how to find assets attractive for investment in this market? Old coins…

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Byzantine coins (ca. 500-1453)
The fall of the Roman Empire was in the late Middle Ages, at least in the east of Europe. After the death of Emperor Theodosius I in 395, the Roman…

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soda solution

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

Coin Albums
Many numismatists with a sense of satisfaction recall the old days, when doing coin collecting, they could buy coin albums in almost any store in the country, which over time…

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Possessions of the Habsburgs - Austria (XII-XX centuries)
In 1273, King Rudolph I became the first representative of the Habsburg clan who ascended to the Roman-German throne. It began the reign of the Habsburg dynasty, which lasted until…

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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…

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