Although silver is a heavy metal, silver ions and silver compounds can kill or control bacteria, viruses, algae and fungi, and the reaction is similar to that of mercury and lead. When food is put in silverware, a very small amount of silver will be dissolved in water in the form of silver ions, which can kill bacteria.
Restore luster
Despite the above maintenance measures, if the silver jewelry is still black, the following methods can usually be taken to restore the original luster of the silver jewelry.
(1) polishing method: This method is better for plain silver head injuries, such as flowerless bracelets and collars. When polishing, you can use silk or toothbrush dipped in a small amount of toothpaste to polish it repeatedly at the place to be polished until the surface of the jewelry is as clean as new, and then wash it with water after polishing. However, this method is not very effective for ordinary carved or carved silver ornaments.
(2) Put some pieces of broken aluminum under the silver ornaments, then put them into soda solution and heat them together to remove the black. Because soda is very alkaline and heated, this method cannot be used for silver jewelry with jewelry.
(3) After cleaning with 1% hot fat room solution, soak the silver ornaments with sodium thiosulfate solution (photographic fixing solution, also called Haibo), and then wipe them with toothbrush or fiber cloth.
(4) If the black on the jewelry is heavy, it can also be washed with concentrated hydrochloric acid. After washing, it should be washed with clear water immediately. Jewelry inlaid with pearls, malachite and turquoise must not be washed with hydrochloric acid, otherwise it will damage the jewelry! ?
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