A water-based ink of the present invention comprises water, a plurality of different water-soluble organic solvents, and a water-insoluble coloring material, wherein the above water-soluble organic solvents consist of a good solvent to the above water-insoluble coloring material and a poor solvent to...http://www.google.de/patents/US7371274?utm_source=gb-gplus-sharePatent US7371274 - Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method.
