You may not know that the Japanese custom of dyeing black teeth may have spread from Chinese mainland to Japan. Ladies' paintings in the Tang Dynasty can also see the situation that women in the Central Plains dyed their black teeth. At that time, it was regarded as noble and beautiful, and it was considered to have the function of exorcising evil spirits or protecting teeth. Personally, I think it's a special sign to make married women obey social norms, right?

This custom was recorded in the 5th century AD in Japanese history and reached its peak in the Edo period. 1870, the shogunate banned tooth dyeing, and 1930 gradually changed customs and customs and disappeared. Most people begin to dye their teeth black after 17 years old or before they get married. It usually takes about two weeks to dye teeth with iron slurry (sulfuric acid) and plant gallnut dye, which can be gradually fixed and colored. (The taste must be smelly and bitter. After the basic coloring is completed, the teeth will turn dark black and will not come back to white. But if you want to keep it black and bright, you must paint it again every few days.

In addition, there is batik, which will fade after washing and is usually used when acting.

At present, there are still ethnic minorities in Indochina.

ぉぉはぐろ) Here are some links.

しのざきぉのの-Introduction Method of Dyeing Teeth Black

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March 24(th), 2008