2. Use silver washing water for cleaning. For silver washing water, immersion method (except for the old process) or wiping method (except for platinum plating process and inlay process) can be used. Put the silver ornaments in silver washing water for about three minutes (if the oxidation is particularly serious, they can be stored for a long time), take them out and rub them repeatedly, rinse them with plenty of water, put them into alkaline sleep (such as washing powder water), and finally rinse them with water.
Step 3 use toothpaste. Using toothpaste is to directly put toothpaste on the silver jewelry, and then add a little water to beat out the foam. If there is a seam, brush it with a toothbrush to prevent foam from entering the seam.
The reason why the silver bracelet turns yellow:
1, because the silver bracelet contains silver, but silver is an unstable element and easily reacts with sulfur. People's sweat contains a lot of sulfur, and chemical reactions will occur when they come into contact with silver ornaments.
2. There is great affinity between silver ion and sulfur ion, which is easy to produce chemical reaction. As a result of the reaction, silver sulfide is produced on the surface of silver. Because silver sulfide is grayish black, with the increase of silver sulfide, the surface color of silver gradually changes from white to yellow, then to gray, and finally to black.