| abstract |
(57) [Problem] To provide an ink composition which can realize an image excellent in abrasion resistance and water resistance, does not cause nozzle clogging, and enables stable printing. An ink comprising at least a self-dispersing pigment, polymer fine particles having an average particle size of 0.5 μm or less, a polyol or glycol ether having 8 or more carbon atoms, an anionic or nonionic surfactant, a water-soluble organic solvent, and water. A composition, wherein the polymer particles have a strain of 1. 0.01 in the dynamic viscoelasticity measurement method where the frequency is swept at 0 Storage rigidity in the frequency range of 10 to 10 Hz is 1 × 10 -1 Pa And the difference between the volume average particle diameter, the number average particle diameter or the area average particle diameter of the self-dispersible pigment and the polymer fine particles is within 50 nm. |