How to deal with the oxidized copper ring?

How to deal with the oxidized copper ring? -Once the jewelry copper ring is oxidized, it is difficult to clean. Generally, it is rubbed with carbon powder and then washed with water. After cleaning, waxing is required. If the brass jewelry is oxidized seriously, the carbon powder may not be cleaned, then high manganese Potassium acid. After wiping, be sure to wax after cleaning, otherwise it will oxidize again. 1. Ketchup: Spray some ketchup on a clean cloth and rub the darkened copper ring with it. Wipe clean with a damp cloth and wipe dry. 2. Soap or mild detergent: If your brass jewelry is dusty or very dirty, rather than darkened, soak it in warm soapy water and clean it with a soft cloth. Particularly dirty areas can be cleaned gently with a toothbrush. 3. Vinegar, salt and flour: These versatile kitchen utensils can be used to make pastes to clean darkened copper ring jewelry. Dissolve a teaspoon of salt in half a cup of vinegar and add flour until it becomes a paste. Rub it on the brass, rinse with warm water after 10 minutes, and wipe dry. 4. Water: Heat a little water, add 1 tablespoon of salt and 1 tablespoon of white vinegar to make another natural preparation for polishing brass ring jewelry. Apply this preparation to the brass jewelry, and then dry it with a clean rag. 5. Lemon juice: Fresh lemon juice can clean brass jewelry and restore its luster. After treatment with lemon juice, wipe clean with a damp cloth and wipe dry. Waxing should use paraffin wax, and evenly apply a layer on the surface of the object. Waxing is similar to polishing. There are two requirements: one is uniform, the other is to be thin, to ensure that the surface of the copper ring is no longer in contact with the outside air, and at the same time it does not feel As long as there is a thick layer of grease.