What was tooth powder in the Edo period like?

In the beginning of the Edo period, a merchant named Cyojiya Kizaemon learned from a Korean how to prepare tooth powder, which was how it started. Until then, people used baked salt or rice bran for tooth brushing. Young men in Edo brushed their teeth diligently to attract women and they boasted their white teeth. They told true Edokko (Tokyoite) from country bumpkins based on whether they used tooth powder or not. In the Bunka-Bunsei period (approx. 1804-1830), more than one hundred types of tooth powder were on sale. Their materials were Boushuzuna (fine-grained sand from the Boso Peninsula) to which substances, such as borneol, clove and cassia, were added. High-end tooth powder, which was flavored with musk and colored pink with rouge, was a specialty item of Edo.