Abstract: The pigment of Agaricus brunnescens Peck is a by-product in mushroom industry. The dyeing performance of the pigment on wool fabric was studied. The pigment was deep brown and its λmax was 256 nm in water. Under the optimum condition(pH value 3, 95 ℃ for 80 min without any other agent), the color fastness to washing and rubbing could reach 4 ～ 5 class, and the light fastness also could reach 3 class. The results showed that utilization of the pigment in textile industry would be ecologically sound and economically advantageous.

Key words: Agaricus brunnescens Peck; pigment; dyeing; wool fabric