Patent ID: 7488064

Claim:
An ink jet recording method comprising steps of; ejecting microscopic ink droplets, and curing the ink by actinic radiation, wherein the ink contains a pigment dispersion comprising a photopolymerizable compound and a pigment, and hydrophilicity δm of surface of the pigment is at most 22 cal 1/2 ·cm −1/2 , the pigment being subjected to a surface treatment so as to have hydrophilicity δm of at most 22 cal 1/2 ·cm −1/2 , in which the hydrophilicity δm is determined based on the following method, the pigment is floated on a predetermined amount of water (B ml), and while stirring, acetone is introduced through a burette of which tip is placed in the water so that acetone is not directly poured onto the pigment, amount of the acetone (A ml) required to sink the pigment is recorded, and δm is calculated based on the formula, δ m =( A ·δ acetone +B·δ water )/( A+B ) δ acetone =9.75 cal 1/2 ·cm −1/2 δ water =23.43 cal 1/2 ·cm −1/2 .