INK JET RECORDING LIQUID, ITS PRODUCTION AND METHOD FOR INK JET RECORDING USING THE SAME

摘要

PURPOSE:To obtain the subject recording liquid, always and stably dischargeable and excellent in preservation stability for a long period without solidifying the ink at the head tip by dispersing a specific pigment and a water-soluble resin in the coexistence of an aqueous medium and then adding the aqueous medium to the resultant dispersion. CONSTITUTION:The objective recording liquid is obtained by dispersing (A) a quinacridone-based compound pigment expressed by the formula (R is H, CH3 or Cl) and (B) a water-soluble resin (preferably a styrene-acrylic acid copolymer, etc.) at (15:1) to (30:1) weight ratio in the coexistence of (C) an aqueous medium and then adding the component (C) to the resultant pigment dispersion. The obtained recording liquid contains the components (A) to (C). A mixed solvent of ion exchange water with a water-soluble organic solvent is preferred as the component (C). Triols such as glycerol are preferred as the water-soluble organic solvent. Ethanol or isopropyl alcohol in an amount of >=3% is preferably used in combination from the viewpoint of discharge stability of the recording liquid.