Patent ID: 7258412
Filing Date: 2007-08-21
Classification: B41J,G06K

Abstract:
1. An ink-jet printing method for forming an image on a printing medium by using a printing head for ejecting a plurality of color inks including inks for basic colors including magenta, yellow and cyan and an ink of particular color having a hue different from that of the basic colors, comprising the steps of: allocating a dot arrangement pattern to each pixel of the image according to a gradation level of each pixel; and ejecting the ink from the printing head to the printing medium based on the dot arrangement pattern allocated to each pixel, wherein the dot arrangement pattern allocated to a same pixel having a gradation level lower than a predetermined gradation level, for the particular color ink, is different from those for at least one color ink other than the particular color ink, and wherein the particular color ink is capable of representing a lightness higher than that of a color regeneration area represented on the printing medium by a combination of two of the basic color inks of magenta, yellow and cyan, and has a hue in the color regeneration area represented by the combination of the two inks.