Patent ID: 6824262
Filing Date: 2004-11-30
Classification: B41M,C09D

Abstract:
An ink set comprising at least:inks of three colors, that is a yellow ink having a hue angle âˆ HÂ° as defined in CIELAB color space on a recording medium in a range of approximately 80Â° to approximately 110Â°, a magenta ink having said hue angle âˆ HÂ° in a range of approximately 330Â° to approximately 360Â°, and a cyan ink having said hue angle âˆ HÂ° in a range of approximately 230Â° to approximately 260Â°; an ink (A) and/or an ink (B); and a reaction liquid containing a reactant; wherein said ink (A) is an ink having said hue angle âˆ HÂ° in a range of approximately 0Â° to approximately 80Â°; said ink (B) is an ink having said hue angle âˆ HÂ° in a range of approximately 260Â° to approximately 330Â°; and said hue angle âˆ HÂ° is tanâˆ’1(b*/a*)+180Â° in the case that a*<0 and tanâˆ’1(b*/a*)+360Â° in the case that a*>0, where a* and b* represent the perceived chromaticity indices as defined in CIELAB color space.