Generally, even people who don't play jewelry will encounter it. People from small to large will have some metal jewelry, gold and silver are the most common, silver prices are more close to the people, more people wear, so presumably many people have also encountered the problem of blackening silver jewelry.
â– Why does silver turn black? Because it wants to change back to "real body"...
In fact, silver is not a metal. Like many gems, it is an ore in nature. It is called a silver mine. This ore is smelted at high temperature to obtain metallic silver. While the silver is uneasy, the constant release of a large amount of energy wants to change back to the ore, resulting in its extremely unstable state.
There is a lot of hydrogen sulfide or sulfur ions in the air. Only a very small amount of "sulfur" is needed to contact with silver, and an oxidation reaction occurs, which restores the original state of silver. The silver mine is black, and the part of the silver that is exposed to "sulfur" will naturally turn black.
Metallic silver + "sulphur" in the air = silver ore, black silver ore
â– How to prevent silver? Regular maintenance, turn black into white
Micro black: It is found that silver begins to darken, but it is not serious. It is necessary to clean it with toothpaste in time, use the fine particles in the toothpaste to rub, and also use the acidic components in the toothpaste to chemically react with the metal oxide on the silver surface. At this time, it is easier for silver to restore its original appearance.
Black is serious: At this time, the toothpaste has not been thoroughly cleaned, and it is necessary to go to a more professional place for pickling recovery.
Adventure method: Because pure gold sterling silver is "real gold is not afraid of fire", so you can use fire to burn red, then turn off the fire and rinse with water, the black surface will be removed. But the adventure is that you must be S990 sterling silver is not afraid of fire, if you are not sure that your silver purity is not enough, it is best not to try.
Protection: Although it can't be completely protected, the best way is to take regular care (can be cleaned with toothpaste), but you can also apply very thin transparent nail polish for oxygen protection. If you don't wear it, you can apply very thin oil on the surface. Store with oxygen and store in a bag.
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