Weak acid pink B can be used for wool and silk dyeing. It is suitable for medium depth and above. The wet fastness is good, but the light fastness is slightly poor. Leveling agent should be added during dyeing to improve levelness. When used for dyeing wool and various fibers with Chemicalbook, the color of nylon is close to that of wool, the silk is slightly lighter, the diacetate fiber is not stained, the triacetate fiber is stained, and the cellulose fiber is slightly stained. It can also be used for printing on nylon, silk, viscose and wool fabrics.