ohaguro or iron smile

Until the breakup of the Shogun-system in the 1860s, it was a fashionable practice for aristocratic married women, mostly—and some men, to stain their teeth to a gunpowder grey to black. Not only were dark things, like ebony and finely-worked lacquer, considered more aesthetically balanced, the dyeing process also acted like a dental sealant to help stop tooth decay, and even the latest modern techniques (also coming from Japan) that promise to eliminate cavities. The practice was called ohaguro in Japan, meaning something like iron-drink, and involved daily applications of iron-filings dissolved in a solution of vinegar and tea. There were comparable methods of achieving the same effect throughout Asia in the past, including using the dye of aubergine skin in China. In vintage Japanese prints and in traditional theatre performances, one sometimes sees a very darkly rendered mouth, but that apparently was not just goth lip-stick but also a way to evoke an ancient practice once outlawed and unfashionable, sort of like Western cosmetic discoveries of belladonna or permanent make-up, but now being revisited.