What are the common cleaning methods for silver jewelry to turn black?

What are the common cleaning methods for silver jewelry to turn black? 1. Wipe with toothpaste: advantages: make silver jewelry quickly regain brightness; disadvantages: make the pattern of silver jewelry become lighter; although toothpaste is paste-like, it is actually composed of fine particles. Wiping with toothpaste is equivalent to polishing the jewelry, so Craft silver must not be cleaned with toothpaste, because the plating layer will be thrown away and the silver jewelry will oxidize faster! 2. Wipe with white vinegar and alcohol: The black silver sulfide is dissolved in the ester acid. Use cotton to soak in white vinegar and alcohol to wipe the silver jewelry again to show its luster. 3. Overnight tea soaking: soak the oxidized silver ornaments in the tea that has been left overnight. The soaking time is about 12 hours. Take out clean water and rinse to remove the oxidized silver and brighten the jewelry again. 4. Coke soaking: This is the way to witness the miracle: soak the oxidized silver ornaments with a small amount of Coke (a small half bottle, local tyrants can choose to buy a new bottle), soaking time is about 12 hours, take out water to rinse, can make the silver ornaments look new like New! This method is suitable for craft silver, especially necklaces, bracelets, or hollowed-out jewelry, and it has a miraculous effect on the dirt in the gaps! 5. Silver wiping cloth: It can remove silver oxide on the surface of jewelry, the principle is the same as toothpaste! Because there is polishing powder on the surface of the silver wiping cloth, do not clean the silver wiping cloth. 6. Silver washing water: You can buy it or you can go to the jewelry store to let them use silver washing water to clean the jewelry. The effect is obvious, but because it is not good for silver jewelry and the body, it is not recommended to use it frequently.