First of all, the platinum ring itself will not fade, and the main reason for blackening after wearing for a period of time is dirt. Then you should clean the platinum ring at this time. Use a jewelry cleaner sold in the market, or soak it in a solution of soap and warm water, and then gently wipe it with a soft cloth. If there are scratches visible to the naked eye, or a natural oxide layer appears on the platinum surface, please take the platinum jewelry to a qualified jeweler for polishing. The scratches on platinum are only metal displacement, and the volume will not decrease.