Coin cleaner: copper - 200 ml

Coin Cleaner: Copper - 200 ml

The 200 ml Clean Coin Cleaning Bath is designed to remove oxidation and surface contaminants from copper coins. The product is formulated as a liquid bath for short-term immersion of the item, followed by rinsing with water and drying without mechanical friction.

The product is formulated as a liquid bath for short-term immersion of the item, followed by rinsing with water and drying without mechanical friction.

Use is based on the chemical dissolution of oxide layers (mainly copper oxides and carbonates) that are formed when the metal comes into contact with air moisture and carbon dioxide. This process restores the original appearance of the surface without the need for abrasive intervention.

The spa is primarily intended for:

• copper coins (Cu)

Manufacturer states compatibility with all common metal-based coins of the materials listed. Use on historic or collectible coins requires professional judgement as chemical cleaning may affect the patina inherent in the value of the item.

Principle of use

The cleaning process takes place in three steps:

• immersing an object in a bath for a limited time (on the order of minutes)

• water rinse

• frictionless drying (e.g. by adding absorbent material)

Important features:

• volume: 200 ml

• form: liquid cleaning bath

• purpose: removal of oxidation and impurities

• compatibility: copper, brass, nickel

• method of use: without mechanical cleaning

Material compatibility and limitations

Chemical baths of this type are primarily effective on:

• copper oxide (CuO)

• copper oxide (Cu₂O)

• basic copper carbonates (patina)

In contrast, they are not intended for:

• mechanical surface damage

• deep corrosion

• precious metals (e.g. gold, silver with patina) without verifying the suitability of the specific product

Collector's Allowance

The use of a cleaning bath for numismatic material must be considered on an individual basis. Removing the patina may reduce the collectible value, especially for historical coins. The product is more suitable for:

• circulating coins

• modern coins without collector patina

• technical or decorative items