In one bath dyeing system of silk/synthetic fiber blend fabrics with acid/disperse dyes. adsorption and desorption behavior of disperse dyes on silk fabric were examined In the dyeing of silk with C.I.Disperse Red 19 and C.I.Disperse Red 60 at 10$0^{circ}C$ for 60minutes, dye uptake with Red 19 was higher than that with Red 60. When the silk fabrics dyed with the disperse dyes were treated in blank aqueous bath with and without undyed synthetic fabrics(PET. nylon. acetate), desorption of the dyes from the silk fabric was influenced by the affinity of the dye to the synthetic fibers treated together.