To make it more complicated, I suggest you heat the bracelet to red, burn off the dirt and oxide in the gap, and then throw it into sulfuric acid for soaking. At this time, the bracelet becomes pure silver white, and then the light is pressed on the bracelet with an agate polisher (dipped in water with agate). Craftsmen who process jewelry use this method ... it is too complicated ... in fact, I don't recommend it. The easiest way is to use silver washing water or silver cloth (available at the jewelry counter) to maintain silver jewelry. Silver jewelry will oxidize and turn black after a long time. Through these two things, it will shine again. The best way to maintain silver jewelry is to wear it every day, because human fat can make it naturally warm and shiny. Contains exquisite three-dimensional silver ornaments made into sculptures to avoid deliberate polishing. If you find that the silver ornaments are yellow, you should first clean up the thin seams of the silver ornaments with a small jewelry brush, and then gently wipe the surface with a silver cloth to restore the original silvery white and brightness. I suggest that if the silver cloth can recover about 80% silver, there is no need to use silver lotion and silver washing water, because these products are corrosive to some extent, and silver ornaments are more likely to turn yellow after using these products. Silver wipes contain silver maintenance ingredients and cannot be washed. If you don't handle and collect the silver jewelry after wearing it, it is very likely that the silver jewelry will turn black. At this time, you should use a small jewelry brush to clean the fine seams of jewelry, then drop a drop of silver emulsion on the paper towel to wipe off the black oxide on the surface of jewelry, and then use a silver cloth to restore the original brightness of jewelry. After that, you should remember to do the daily general maintenance to prevent the silver ornaments from turning black again. It is difficult to rub the silver ornaments white after many times of blackening.