| 摘要 |
PURPOSE: To obtain the subject ink containing water, a water-soluble organic solvent composed of a compound having a specific structure and a pigment dispersion dispersed by using a specific dispersing agent, having excellent storage stability and enabling stable ejection through a nozzle. CONSTITUTION: This water-base dispersed ink contains at least (A) water, (B) a water-soluble organic solvent composed of a compound of the formula (R is H, CH3 , CH2 CH3 or Cl; (n) is an integer of 4-20) and (C) a dispersion of a pigment or a disperse dye produced by dispersing a pigment or a disperse dye with a polymeric dispersing agent having an anionic dissociation group. The addition amount of the component B is 1-30wt.%, preferably 3-20wt.% based on the ink. The polymeric dispersing agent preferably has a weight- average molecular weight of 3,000-1,5000 and the weight ratio of (coloring material) : (dispersing agent) is 10:3 to 10:0.5 for the pigment and 1:3 to 20:1 for the disperse dye. |
