How to tell the authenticity of a silver cup how to tell the authenticity of a silver cup

1, thermal conductivity judgment. Silver has a strong thermal conductivity. You can pour a little boiling water into the bottom of the silver cup and touch the silver-containing part of the cup mouth with your hands. It immediately felt hot, indicating that the silver purity of this cup is above 80%, and it is not a silver-plated product.

2, bleach detection. Bleach is easily oxidized. Drop a drop of bleach on the inner liner of the silver cup. Observe the surface changes of the silver liner carefully. If the silver lining turns black or turns black immediately, it means that the purity of silverware is high.

3. Magnet detection. Take a magnet and put it on the inner wall of the silver cup. Magnetism is false, but it is true without magnetism. Pure silver does not form a magnetic field, while fake cups are mostly made of stainless steel and electroplated, so they are magnetic.

4. Listen to the sound. Take a one-dollar coin and put it in a cup. Listen to the sound. If the sound is low, there is a buzz, and the sound is not big, it can basically be judged as pure silver. Conversely, if it is crisp and loud, it is a silver-plated cup.