... strict select,wash,polished,and then Covers aprecious metal silverskin on the glass surface,then covers a layer of copper platingfilm, covers a ... clear and bright,image soft but not distortion.2) the lacquer on the back is acidproof,alkaliproof and moisturetight.3)it is widely ... coating,drying an so on.Features:1)Image clear and not distortion,the smooth finish and of the lacqueron the back is high ...