The invention discloses a
reactive dye dyeing technology of cashmere. The
reactive dye dyeing technology comprises four steps of cleaning cashmere, performing activation, performing
dyeing and performing color fixation. According to the
reactive dye dyeing technology of cashmere, a
ferrous complexing step is additionally performed,
pigment in purple cashmere can be complexed with
ferrous iron ionsto form chelated substances, then through
oxidation reduction, bleaching is performed, the purple cashmere is white wholly after bleaching treatment, the
fiber whiteness of the cashmere is obviouslyimproved, the
weight loss is controlled within 5%, and influence on the whole shape and the structure violence of the cashmere is small. According to the reactive dye dyeing technology of cashmere, astep of pretreating a
rare earth chloride acid solution is additionally performed, and
rare earth has the effect of activating fibers, so that the fibers can swell, and the structure is loose; and therare earth has the
catalysis effect on the fibers and active centers in dye molecules, so that the surface
activation energy of the fibers can be reduced, and further the dye-uptake at low temperature can be increased.