1. Natural oxidation: The chemical properties of silver are unstable, and it reacts with sulfur in the air for a long time to generate black compounds, which make its surface black and look like paint stripping.
2. Wear: Silver bracelets often have patterns on their surfaces. After hitting hard objects or natural wear, some patterns will sag and look like paint.
3. Silver plating: When the inside of the silver bracelet is copper and the outside is plated with silver, it is called silver plating. After the silver layer on the surface of silver-plated jewelry naturally falls off, the copper inside is exposed, which looks like paint falling off.
The above answers are for reference only. If you want to know more details, it is recommended to consult a professional.