How to save custom badge commemorative coins?
First of all, avoid direct bumping or rubbing with hard objects. Do not pack several coins in one pocket at the same time, and use soft cloth or paper to wrap them separately.
Secondly, it is necessary to prevent hand stains. When the commemorative coins leave the factory, they are equipped with a thin, sealed transparent plastic bag to prevent the coin surface from being oxidized. Take it out and touch it directly with your hands. When viewing the commemorative coin, you should wear thin gloves if possible, and pinch the edge of the commemorative coin with your thumb and index finger to prevent sweat stains from polluting the coin surface.
Again, avoid contact with acidic substances. Custom badges
Commemorative coins should be stored in a ventilated and dry place for collection. The maintenance methods of precious metal commemorative coins are more important, as follows:
1. How to clean gold coins, gold coins do not actually need to be cleaned. If it gets dirty, just wash it in warm soapy water, then rinse with clean water, and put it in a soft cloth to absorb the water.
2. The cleaning method of silver coins, the method of cleaning silver coins firstly depends on the oxidation degree and fineness of the silver coins. If silver coins with high silver content are only slightly oxidized, use ammonia solution plus sodium carbonate solution and toothpaste to prepare a paste for cleaning, or use edible white vinegar with a small amount of water, and soak the silver coins in the solution for a few minutes. You can also use cotton balls Dip the solution and gently wipe the coin surface. After the oxide layer on the coin surface is dissolved, rinse it off with water.