/ Material / Red masonry, resin fittings, stainless steel ear pins ➣ Care instructions After use, it is recommended to store it in a jewelry box or in a bundled pocket to avoid darkening or partial oxidation of air. Pure copper jewelry can't avoid the darkening of the color, but like the maintenance method of sterling silver, you can use the silver cloth or copper oil to wipe the original brightness. If you don't have copper oil in your home, you can also use warm water to wash your toothpaste. After brushing it, wipe it off with a silver cloth. The silver cloth itself can't be washed! If it is too moist to produce patina, it is recommended to use vinegar or lemon juice to mix the toothpaste, apply the jewelry for 10 minutes, then use cotton or cotton pad to rub the ring, and finally on the copper oil maintenance.