What is the reason for silver blackening

summary

Silver turns black because it is oxidized after long-time contact with substances in the air. Generally, oxides are eaten black, but silver turns black easily. Let's talk about the reason why silver hair is black.

What is the reason for silver blackening

First: after cleaning the stains on the table with clean water, squeeze a little white toothpaste with a soft toothbrush, preferably fluorinated, and then brush the silver jewelry back and forth slowly for about 3 minutes, and then clean it with clean water.

Second: the black oxide is easy to dissolve in acetic acid. You can dip a cotton swab in white vinegar and apply it on the silver jewelry. About 5 minutes, clean it with clean water.

Third: after mixing tartaric acid, salt and alum, add a certain amount of water to boil, then put the silver jewelry in it and soak it for about 10 minutes, then wash it with clean water and wipe it dry, and then polish it with silver cloth.

matters needing attention

After the silver jewelry is washed and not cleaned, a layer of wax on the surface can make the silver jewelry more difficult to be oxidized.