The invention discloses a dark red
dyeing process of a
reactive dye for
wool, which comprises the following steps: step 1, placing a to-be-dyed wire harness in a dye vat, and carrying out preheating treatment; 2, sequentially adding a penetrating defoaming agent, a
dyeing accelerant and
formic acid into the preheated dye vat to form a reaction solution; step 3, adding
reactive dye into the reaction liquid, operating, heating the reaction liquid to a first
reaction temperature at a temperature rise speed of 2 DEG C per minute, and keeping the temperature; 4, cooling the reaction liquid to a second
reaction temperature, and adding
ammonia water for operation; step 5, discharging the dye liquor in the dye vat, performing
water washing treatment, heating to a second
reaction temperature after
water washing, and then adding
sodium dithionite into the dye vat; 6, draining the dye vat, and sequentially carrying out hot
water washing treatment, cold water washing treatment and
acid washing treatment; and step 7, rewinding the wire harness subjected to acid
pickling treatment, and then dehydrating and
drying the wire harness. The dye and the auxiliary agent used in the invention are environment-friendly, and the dyed product does not contain
heavy metals; compared with a traditional
dyeing process, the dyeing process is more convenient to operate, higher in
operability, higher in color fastness, reliable in indexes such as soaping fastness and the like.