Vat Dyes are any of an extensive class of water-insoluble colors, for example, indigo and the anthraquinone subordinates that are utilized especially on cellulosic strands. The color is connected in a solvent, lessened frame to impregnate the fiber and after that oxidized in the fiber back to its unique insoluble shape. These colors are particularly quick to light and washing. These colors are utilized for shading cellulosic fiber uniquely cotton fiber. The way toward changing over insoluble vat colors into solvent frame is known as vatting. Vat Dyes have bunches of properties, which are required to recall previously and amid coloring process. These proffer stability in their colors and work as the natural coloring dyes.