Copper/aluminum alloys are largely utilized in odontological restorations because they are less expensive than gold or platinum. However. tarnishing and important corrosion in intrabuccal prostheses made with copper/aluminum alloys after 28 days of use have been reported. Several kinds of food and beverage may attack and corrode these alloys. https://www.chiggate.com/earthbath-facial-wipes-25ct-fashion/