How to Clean Copper Coins and Bronze Articles
How to Clean Copper Coins and Bronze Articles
Antique copper Coins and bronze objects are found not onlyin museum and private collections, sometimes they just get from grandmothers or suddenly show up in old apartments and houses. Unfortunately, time is merciless to such an active metal as copper and its alloys, and things look not so beautiful. However, their heavy shine can still be returned.
You will need
- - solution of ammonia;
- - a drug called Trilon-B;
- - Vaseline oil;
- - Toothpaste;
- - a cleaner (for example, Domestos);
- - Canvas fabric.
Instructions
1
If you find an old copper coin coveredan even layer of patina (a greenish coating formed as a result of the oxidation of copper), then it can not be cleaned, since patina is a natural protection of metal from the environment, and the coin price of numismatists is not affected. From the patina you can get rid by placing a coin in a 10% solution of ammonia. At the same time, we must ensure that the coin is completely hidden by the solution, since contact of ammonia with air can damage the metal. After the green patch changes color to white, the coin can be dipped in vegetable oil and wipe with a dry cloth.
2
Blackened copper coin or bronze objectcan be cleaned with a solution of a drug called Trilon-B (disodium ethylenediaminetetraacetic acid). Unlike acids, it affects only the oxides, without damaging the metal itself. Depending on the condition of the item, the validity period can be from a few minutes to 5-7 hours. After Trilon-B treatment, the coin needs to be washed with clean water and wiped.
3
One of the most humane ways to clean copper orbronze - boil it in vaseline oil, which can be bought at the pharmacy. For cleaning it is enough to hold the coin in boiling oil for 10-15 minutes. Be careful, take out the coin only after the oil has cooled sufficiently. After such bathing, the coin can be boiled for a few minutes with a detergent or a detergent to get rid of the oil spray.
4
The option recommended by restorers forcontaminated coins: hold the coin for 1 minute in a cleaning solution, then boil the soap shavings with water and place the coins in a soapy solution for 2-4 weeks, periodically taking them out and cleaning with a toothbrush. At the end of the period of the coin, it is necessary to boil in sunflower oil for about 10 minutes and wipe with a canvas cloth.
