Indigo Blue is mainly used for dyeing cotton, cotton, wool or silk. This pigment is an important pigmentation treatment for vat dye indigo. Indigo Blue has excellent light fastness, weather fastness and heat stability, giving a blue hue. A liquid dispersion dosage form can be prepared, which is mainly used for coloring and printing of viscose fiber pulp. Used in biochemical agents and indicators as well as dyeing of cotton yarn, cotton, wool or silk.