Views:83 Author:Site Editor Publish Time: 2019-12-24 Origin:Site
Nowadays more and more people are obsessed with the investment method of coin collection. Many types of commemorative coins on the market are favored by collectors. Many ordinary commemorative coins contain various copper alloys, so if there is any inadvertent oxidation in the storage of such commemorative coins, the value of the collection of commemorative coins will fall. It will also affect the appreciation space of the commemorative coins. Then, for coin lovers, it is quite important to know how to save the commemorative coins without oxidation.
If you want to save the commemorative coins without oxidation, you must firstly understand the reasons for the oxidation of the commemorative coins. There are two main reasons for the oxidation of commemorative coins.
The first reason is that it has been exposed to excessively oxidized environments for too long before packaging, or ignore protection when appreciating, such as touching coins with bare hands. The second reason is that the packaging is not tight or the packaging itself has a tendency to cause chronic oxidation caused by an externally oxidizable environment. Generally experienced collectors will purchase moisture-proof boxes for storage to avoid oxidation.
After understanding the cause of the oxidation of the commemorative coin, it is more targeted to save the commemorative coin so that it does not oxidize.
First of all, it should be noted that the storage environment cannot be selected where the air is not clogging. Many coin lovers like to keep the commemorative coins in the collection for a long time. Since the ordinary collection does not cut off the commemorative coins from the outside air, when the weather becomes wet, the moisture on the surface of the commemorative coins becomes difficult to volatilize, thereby oxidizing the commemorative coins. Therefore, if conditions permit, vacuum packaging is the best way to save!
Secondly, we should use a protective box to seal the commemorative coins one by one, and then store them in a sealed container. The double protection prevents oxidation and protects the value of the commemorative coin collection.
Finally, we must pay attention to the commemorative coins can not be used frequently to touch. Because sweat or other oily substances can cause oxidation after sticking to the coin body, it is best to wear clean white cloth gloves when viewing the commemorative coins, or use the philatelic tweezers to grab the commemorative coins, but be careful not to let the sharp front section Injury.
The maintenance method of precious metal commemorative coins should be more important, as follows.
Gold coins do not actually need to be cleaned. If it is dirty, just wash it in warm soapy water, then rinse it with water and put it in two quick and soft cloths to absorb the water.
The method of cleaning silver commemorative coins depends first on the degree of oxidation and color formation of the silver coins. The method of cleaning silver coins depends first on the degree of oxidation and color formation of the silver coins. If the silver content of high silver content is only slightly oxidized, it is best to wash it with a solution of sodium carbonate plus sodium carbonate solution and toothpaste to form a paste. You can also use white vinegar with a small amount of water, soak the custom commemorative coins in its solution for a few minutes. You can also gently wipe the surface with a cotton ball dampening solution. After the surface oxide layer is dissolved, rinse it off with water.
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