Silver is chemically active, so it will react with sulfur dioxide in the air to produce black silver sulfide. When the silver surface is oxidized to black, the following maintenance methods can be adopted.

1. If you want to make the newly bought silver jewelry brighter and avoid blackening, you can apply a thin layer of transparent nail polish on the surface and then apply it again every ten days. If you want to remove nail polish, you can soak it in banana oil and then wash it with water.

2. Wipe the silver surface with a soft cloth every day to keep it shiny. But it's best to use special silver cloth. Silver wipes contain silver maintenance ingredients and cannot be washed.

3. You can use a small jewelry brush to clean up the fine seams of jewelry, then drop a drop of silver rubbing emulsion on the paper towel to wipe off the black oxide on the surface of jewelry, and then use a silver rubbing cloth to restore the original silvery white and brightness of jewelry.

4. Soak the silver in water, then wash it with clear water, wipe it with cotton cloth and keep it dry. However, it is suggested that silver washing water should be used as little as possible, because silver washing water is a chemical product. Using the corrosiveness of silver washing water to clean silver ornaments will cause harm to silver ornaments for a long time.