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The dust and dirt on the copper decorative surface with protective layer can be gently rubbed with soft cloth with feed-electric water and clean water, not touched with solvents and corrosive chemicals.
It is strictly prohibited to use glass adhesive copper jewelry.There is acid putrescence due to glass gluing.Damage to the protective layer of copper surface, so that copper jewelry quickly black.Glue, sealant, or other neutral adhesive may be used where it is necessary to bond.