How to judge whether the contact is silver

Silver contacts are brighter in color, usually, silvery white or grayish-white, while fake Pure Silver Contacts are darker in color, or appear yellow or dark gray. If your Electrical Silver Contacts are darker in color or have obvious yellow or gray, it is likely to be an alloy, not a pure silver contact.

Pure Silver Contacts are not attracted by magnetic force, while other alloy contacts have strong magnetic attraction. You can use a small magnet to bring the Electrical Silver Contacts close. If there is attraction, it is probably not a silver contact.

Solid Silver Contacts are hard, very smooth to the touch, and feel very crisp. At the same time, Electrical Silver Contacts are relatively heavy and have a certain sense of weight. Therefore, it is also a simple and easy way to feel the weight and touch of the contacts with your hands.

Bimetal Silver Contacts are often dissolved or reacted by chemical reagents. This method can be used to determine whether the contacts are silver. For example, you can put a small piece of white drawing paper under the silver contact, and then drop potassium hydroxide solution on the drawing paper. If black spots appear on the paper, the contact is silver. If spots of other colors appear, it is likely not a silver contact.

The above are several simple, convenient, and practical judgment methods. I hope they can help you accurately judge whether the contact is silver and avoid deception. At the same time, silver contacts have better conductivity and anti-oxidation properties than other alloy contacts, so silver contacts should be selected when purchasing and using.