How to clean the dirt on copper coins without damaging them?

If there is a lot of green slime on the copper coin, the collector can clean it with anhydrous alcohol at this time. If there are dirt and fingerprints on copper coins, you can also use this method to clean them, especially new fingerprints and dirt, which has a particularly good removal effect. Of course, be careful not to do it again, otherwise repeated cleaning will also hurt coins. For long-term traces, gently wipe them with a high-grade eraser without sand, and pay less attention.

If it is a lot of dirt or special dirt, such copper coins should be handled skillfully. If possible, it is recommended to use an ultrasonic cleaning machine to clean it, and then use anhydrous alcohol to clean it. When cleaning, the copper coins should be hung in the cleaning solution, preferably with a net bag, so as to avoid the collision between the copper coins and the inner wall of the cleaning machine and produce new traces.

In addition, when cleaning up the dirt and residue on the surface of copper coins, we should also observe the coins, pay attention to stop the problems in time and take effective remedial measures.

Extended data:

1, gold coin cleaning method.

It is common knowledge in the collection field that gold coins cannot be cleaned at will, but if there is dirt, some cleaning methods, such as warm soapy water, should be adopted. Then dry it with a clean soft cloth. Be careful not to rub or spin it dry, so as not to cause scars on the gold coins. In addition, in the process of cleaning and moisture absorption, we should pay attention to the wiping strength of soft cloth, and don't make it too strong, so as not to cause scratches and reduce its aesthetics.

2. Cleaning method of silver coins.

Silver coins contain a high amount of silver, and it is easy to form an oxide layer underground. So when cleaning silver coins, soak them in ammonia for about an hour. After soaking, clean it with warm water, then blot it with a soft cloth and keep it properly.