The inner lining of the cup are 999 pure silver But the insulation layer is made of stainless steel Because if the insulation layer is made of pure silver, the insulation effect will not be good And the quilt is easily deformed. Thanks for your great understanding. How to clean the blackened silver?Please wipe it with white cotton cloth. The silver will soon recover its luster. Please put toothpaste on the black silver part and gently brush it with a toothbrush.
If the oxidation is very serious, you can soak it with silver wiping water and then wipe it with white cotton cloth. About the maintenance of silver jewelry color. The chemical properties of silver are relatively active, so it will react with sulfur dioxide in the air to form black silver sulfide, and the surface of silver ornaments will oxidize and turn black. It is best to avoid contact with chemicals such as water and perfume.
Discoloration is not a quality problem, and improper use. All of them will seriously fade the color of silver products. If you are not wearing it, please put it in a container that is isolated from the air, such as a sealed bag, jewelry box, which can keep your silver jewelry color and luster longer!Is this real pure silver? A: Yeah, The item is real 999 pure silver, it have stamp?? Do you accept return if I don'y like it? A: We offer 30 days return guarantee, you can return it without any reason within 30 days after you receive it. Why does silver turn black or yellow? A:During the transportation of package, silver contacts with oxygen and water in the air and oxidizes, so it turns yellow or black. Time: Monday to Saturday 4:00pm to 0:00am. We don't work on Sunday.