Because pure silver jewelry is easy to oxidize, it will turn yellow and then black when oxidized with sulfur. In life, sulfur is everywhere. Sulfur is contained in air, skin, tail gas and even some foods. It is precisely because of the redox reaction that may occur everywhere that silver ornaments and silverware will turn black and discolor to varying degrees after being used for a long time-this is a natural phenomenon.

The reason why some friends wear silverware is that there is no sulfur in their sweat, while other skin secretions protect silverware.

Extended data:

Maintenance skills of silver ornaments;

When you don't wear silver ornaments, you must put them in a silk bag alone and tie the rope. Don't mix it with other metal ornaments, and don't put it in a dark and humid corner.

Be sure to avoid putting silver ornaments together with hair gel, perfume and skin care products. Silver ornaments contact with hot spring water or sulfide, which is easy to cause chemical reaction and lead to yellowing of the surface, so it should be avoided to wear in hot spring areas.

When the silver ornaments are oxidized to black, toothpaste, silver cloth or silver washing water can be used to remove the black rust on the surface. Gently brushing with a small amount of toothpaste is the best way to remove the rust of old silver ornaments, followed by wiping silver cloth. Silver washing water is corrosive to some extent, so it is best not to use it.

Never take old silver ornaments to a jewelry store for renovation, because jewelry stores usually use silver washing water, fire or mechanical polishing, and some old silver ornaments are not pure enough (the old purity is not as good as the present). If these methods are used for renovation, some old silverware is likely to turn yellow or red, but it is self-defeating.

People's Network-Why do some people turn black when wearing silver ornaments?

People's Network-Maintenance of Old Silver Jewelry