KYOTO BLUE Flower Dyed Hemp Handkerchief Botanical Dye "Dew Grass: Tsuyukusa" Botanical dye In Japan's manufacturing, BOTANICAL DYE natural dyes have been loved and used by people for 5,000 years. Botanical dye is a new technology that contains a small amount of chemical dyes to make it with the energy, message, and power of color that plants originally have, and increases the fastness without the use of mordants. The colors extracted from the flowers of the dew grass were difficult to dye, so they were used for the sketches of dyed objects. Tsuyukusa (ancient name "Tsukikusa"), which has been popular with Japan since ancient times, is often recited in the "Manyoshu".