[Explanation of a color]

The Yuuou, it is a bright vivid yellow. Color pigments made from “stone yellow” mineral mainly composed of arsenic sulfide, arsenic. The orpiment there is an alias of “Oki”, is the origin of the color name.

Orpiment is a bright yellow as high purity, had been steamed in many places, is highly toxic, it has not been used as a pigment now. In its risk is the late Edo period of readings “Ugetsu Ugetsu”, it is as there is a scene to prepare a place for getting rid the incarnation of the snake.

Oki but is pigment old as can be seen in the “Hongi to Shoku Nihongi food” history book of the Heian period, and even in the old days of Japanese painting, its rich yellow has been kept up to now.

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