Ink jet ink composition and printing method

摘要

An ink jet ink composition and an ink jet printing method using said composition which is comprised of water, a humectant, and composite colorant polymer particles, wherein the composite colorant polymer particles having a colorant phase and a polymer phase, the polymer phase of the particles being formed in situ in the presence of the colorant, the composite colorant polymer particles not increasing in mean particle size more than 50 % when said ink is incubated for one week at 60 DEG C.