The best "Black" in the Naiard Henna series that came from years of Henna research. The carefully selected henna and wood indigo will be dyed deeply in one time, and the herbs of the original recipes give your hair a crisp, stiff and glossy finish. Local staff conducts manufacturing and managing materials selection, and compound, filling, and inspection in Japan before delivery. Recommended for those who want to dye their gray hair in a transparent black color, or for those who want a black finish that does not pull out of the black hair.