I bought a silver cup when I was traveling. How to tell if a cup is pure silver?

Introduction: It is the annual summer vacation again, and children and parents are happy to travel. There will also be a variety of special goods during the trip, among which silver cups are very common and the price is not very high. Everyone is curious about whether it is real sterling silver. The following small series will tell you how to identify whether the cup is pure silver.

First, the magnet identification method Bian Xiao told everyone that real pure silver is not magnetic, so if you want to know whether the silver cup you bought during the trip is pure silver, you can put a magnet on the inner wall of the cup. If the magnet is attracted, the cup is a fake. If the magnet slides to the bottom of the cup immediately, the cup is pure silver. Bian Xiao told everyone that most fake silver cups are made of other metals and are magnetic.

Second, the thermal conductivity method is very good for identifying the thermal conductivity of pure silver. You can pour some boiling water at the bottom of the cup and then touch the mouth of the cup with your palm. If it feels very hot, it means that this cup contains a lot of silver, or it may be pure silver. It is not a silver-plated product, it uses the rapid thermal conductivity of silver. The real sterling silver cup liner is a little frosty, because even after a lot of polishing, it has a certain roughness. On the contrary, the surface of electroplated silver products is very smooth, so you can touch the inner wall of the silver cup by hand. If it is smooth, it is a fake. Finally, whisper, silver-plated cups are very harmful to people's health, so we must identify them well.

Third, the experimental identification of bleach Bian Xiao learned from professionals that silver is the most active of all metals, and it is most likely to react with oxygen in the air and turn black or brown. Bleach in life is very oxidizing. We can drop a small drop of bleach on the inner wall of the silver cup and then carefully observe the changes of the inner wall surface. If the inner wall darkens or turns black immediately, it means that the silver cup is of high purity, or it may be a pure silver cup.