The metal zippers on the market are mostly made of materials such as aluminum alloy, brass, white copper, zinc alloy, etc. Due to the color of the teeth on the metal zippers being electroplated, if stored improperly, the teeth will turn black and cause pollution to the fabric. For copper alloy teeth, oxidation is prone to occur. Therefore, it is necessary to ensure certain ventilation during storage, do not store them in a sealed environment, or in a humid environment. If necessary, use anti moisture paper or dehumidifier.