Patent ID: 8007097
Filing Date: 2011-08-30
Classification: B41J,C09D

Abstract:
1. An ink jet recording method comprising: a step of ejecting a water-based ink onto a recording medium by the ink jet method, wherein the water-based ink comprises water, a plurality of water-soluble organic solvents, and a water-insoluble coloring material, wherein the water-soluble organic solvents comprise at least one good solvent to the water-insoluble coloring material and a plurality of poor solvents to the water-insoluble coloring material, wherein a total amount A (% by mass) of the good solvent or good solvents in the ink and a total amount B (% by mass) of the poor solvents in the ink are in a ratio A:B of from 10:5 to 7:9 both inclusive, wherein at least one of the plurality of poor solvents is a water-soluble organic solvent selected from the group consisting of diethylene glycol, polyethylene glycol, and 2-pyrrolidone, wherein the water-insoluble coloring material is selected from the group consisting of a resin-dispersed pigment, a microencapsulated pigment, a self-dispersing pigment in which hydrophilic groups are bonded to a surface of pigment particles via another group of atoms, and a polymer-binding self-dispersing pigment, wherein the water-soluble organic solvent showing the largest Ka value in the recording medium as determined by the Bristow method among the water-soluble organic solvents is a poor solvent, and wherein the recording medium is plain paper.