When 18K gold turns black, you can buy a pack of developing powder, add a proper amount of clear water and stir it evenly, then soak 18K gold for five to ten minutes, take it out and rinse it with clear water, and wipe it with a dry cloth to restore its luster. Or take 18K gold to the jewelry store for re-electroplating or polishing.

If 18k gold turns black when soaked in developing powder, you can buy a pack of developing powder from a photography shop, add a proper amount of water to a clean vessel, stir it evenly, soak 18K gold for five to ten minutes, rinse it with clear water after taking it out, and then wipe it with a dry cloth to restore the luster.

Electroplating in Jewelry Store If the coating on the surface of 18K gold has fallen off seriously, it can be taken to the jewelry store for re-electroplating or polishing to restore the original luster of 18K gold.

Regular maintenance 18K gold jewelry will have a lot of stains on its surface after being worn for a long time, and it will look a little black. Therefore, it is recommended to clean and maintain it regularly, which can also better avoid the fading phenomenon of 18K blonde hair.