and a ph stabilizer of 0 6 to 1 0 are added and stirring for 45 to 60 min at a stirring speed of 1200 to 1480 r min then ethylene glycol is added to the mixture to adjust the viscosity of the colorant to 1000 to 1300 centipoise at 25 u00b0 c to obtain a crude colorant the resulting colorant is ground to a particle diameter in a ball mill for about 2 hrs so that the ground colorant can pass through a 200 mesh sieve and then the surface tension is adjusted to u2267 40 dyne with diethylene glycol to obtain the printing colorant the active dye used in this implementation is a kn type active dye and may also be an m type active dye and the cold transfer printing paste may be the cold transfer printing paste of any one of embodiments 1 to 3 a kn type active dye is used to formulate a colorant and as for the formulation process reference can be made to the flow chart of a process of formulating a printing colorant shown in fig2 the kn type active dye printing colorant includes by weight percentage as for the formulation method reference can be made to the common formulation method of the printing colorant in this embodiment the pastes of embodiments 1 to 3 are respectively used to prepare a printing colorant to obtain printing colorants marked as a printing colorant 41 a printing colorant 42 and.