Oxidising or antiquing silver After the silver clay piece is sulphurized, it can be polished until the metallic luster appears. *Wash the piece with neutral detergent and remove any grease before you soak it in the sulphurizing solution.  | |  | | | Add 2-3 drops of sulphurizing solution to a cup of warm water. Stir well. | | Soak the piece in the cup and wait for about 1 minute. When the entire piece had turned envenly blue black, remove from cup and rinse the piece in water. | |  | |  | | | Polish the raised parts with a polishing cloth containing a small amount of silver polish until the metallic luster appears. | | Complete. | | |