[Applications]: The direct dyes are widely used to dye and print cotton, hemp and viscose, and to dye silk, lanital, etc. lighter dyeing effect than cotton and viscose; it can be used for cospinning materials of viscose and natural silk. Also direct dyes are used in cattle paperboard, cardboard, non-carbon paper base paper, advanced office paper, newsprint and special paper color, and ink-jet, ink dyes.