They are with the high fixation value in deep shade and have bright shade. Their build-up property is excellent. All this is possible on account of the presence of one more Reactive Group in the dye molecule than the two in the Bi functional Reactive Dyes. Thus, they have three Reactive Groups, hence called the “TRIFUNCTIONAL” Reactive Dyes. They have the highest Fixation rate and the least dyeing residue. Besides, they show excellent Washing-off property compared to other Reactive Dyes. They have perfect compatibility in all range of concentration, because of their similar fixation speed and value.