Silver oxidizes to black when exposed to air, and there is oxygen in water. Silver may be oxidized to black whether it is wet or not.

Secondly, silver ornaments turn black because silver reacts with sulfur in the air to produce black silver sulfide. When wearing tremella, human sweat contains sulfur, ammonia and so on. Moreover, the air also contains hydrogen sulfide, nitric oxide and other substances, which will lead to the oxidation of the surface of silver ornaments, and then change color and lose luster. The blackening of tremella nails is also related to the acidity and alkalinity of human sweat, which is acidic, and the blackening of tremella nails will be faster.

Extended data:

Precautions:

1. Sweat and grease secreted by users every day will condense in the ear hole, which may stink for a long time, and even lead to inflammation in severe cases, so no matter how long the ear hole is pierced, it is necessary to clean and care it regularly.

2, less touch: users usually have nothing to do, do not touch their ears with their hands, there are many bacteria on their hands, which is not good for ear holes and earrings.

3. Ear piercing has been played for several years, and it may be blocked if you don't wear earrings for a long time, so it's best not to stop using earrings, or you will be in trouble once your ear piercing is closed.

4. If wearing earrings is too troublesome, you can choose anti-blocking ear stickers, silver, gold and resin. In order to prevent the ear stick from accidentally falling off, the diameter of the needle bar is preferably above 0.7 mm. Ear patch is simple and lightweight, but remember to clean and replace it frequently.

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