Patent ID: 7048356
Filing Date: 2006-05-23
Classification: B41J

Abstract:
1. A method of ink jet printing on a print medium for each band by ejecting coloring inks and a reacting liquid which reacts with the coloring inks from a print head while scanning the print head with respect to the print medium, the print head having a nozzle array in which a plurality of nozzles for ejecting the coloring inks are arranged in a predetermined direction and a nozzle array in which a plurality of nozzles for ejecting the reacting liquid are arranged in the predetermined direction, and conveying the print medium in a direction different from the direction of scan of the print head, the method comprising: a reacting liquid ejecting step of ejecting the reacting liquid from the print head to a predetermined band on the print medium during a first scan of the print head; and an ink ejecting step of ejecting the coloring inks from the print head to the predetermined band to which the reacting liquid has been ejected, during a second scan of the print head succeeding the first scan, in a direction opposite to a direction of the first scan, wherein the reacting liquid ejecting step ejects the reacting liquid to the predetermined band so that a ratio of an amount of reacting liquid impacting per a unit area to an amount of coloring inks impacting per the unit area is reduced as the first scan progresses.