Maintenance and cleaning

The maintenance and cleaning of coins, medals and collectible banknotes require specific products and tools, adapted to the nature of the metals and materials involved. Inappropriate cleaning can irreparably alter the surface of a coin, reduce its numismatic value and destroy its original patina.

The coin cleaning solutions are formulated to respect the alloys commonly used in numismatics: gold, silver, copper, bronze, brass and nickel. They remove surface deposits, light oxidation or handling marks without abrading the metal or dulling the coin's natural lustre.

The numismatic cleaning brushes are made with soft bristles, generally natural or low-hardness synthetic fibres, to avoid any scratching on the reliefs and fields of coins. They are available in different sizes to suit various coin formats, from small coins to large medals.

The non-abrasive cloths and fabrics used in numismatics are specifically designed to leave no fibres or residue on the surface of coins. These microfibre or treated cotton supports allow gentle drying after cleaning or simple regular dusting of collection specimens.

The precision swabs and cotton buds facilitate localised cleaning of raised areas, engraved legends and complex motifs found on ancient coins or commemorative medals. Their use requires precise movements and minimal pressure.

The neutralising and patina-stabilising products stop the progression of ongoing oxidation on copper or bronze coins, particularly to treat bronze disease, which manifests as characteristic powdery green spots.

The work trays and supports designed for coin cleaning offer a stable and protected surface, often covered with soft material, to handle coins without risk of impact or scratching during maintenance operations.

All these supplies are intended for both private collectors wishing to maintain their coins in the best possible conditions and numismatic professionals, dealers, auctioneers or curators, who regularly deal with specimens requiring careful restoration before appraisal or sale.

It is essential to remember that any cleaning must be carried out with the greatest caution. A coin retaining its natural patina will generally be better valued during an appraisal than a clumsily cleaned coin, even with appropriate products. These tools and products are therefore intended for reasoned and documented use, in strict respect for the integrity of the coins treated.