Patent ID: 6235098
Filing Date: 2001-05-22
Classification: C09D

Abstract:
A hot-melt ink composition for ink-jet printing in which an ink composition, which is solid at room temperature, is liquefied by heating and ejected to form an ink dot on a recording medium, said ink composition comprising at least one composition of:(a) a cyan ink composition containing a cyan pigment as a colorant, wherein the cyan ink composition shows a maximum chroma C* on a recording medium of 50 or higher, a hue angle H.sup.0 at the maximum chroma of from 240.degree. to 270.degree. and a color difference .DELTA.E* of 3 or smaller as measured through 100-hour irradiation with xenon lamp light at a luminous energy of 0.35 W/m.sup.2 and a wavelength of 340 nm;(b) a yellow ink composition containing a yellow pigment as a colorant, wherein the yellow ink composition shows a maximum chroma C* on a recording medium of 70 or higher, a hue angle H.sup.0 at the maximum chroma of from 90.degree. to 110.degree. and a color difference .DELTA.E* of 5 or smaller as measured through 100-hour irradiation with xenon lamp light at a luminous energy of 0.35 W/m.sup.2 and a wavelength of 340 nm; and(c) a magenta ink composition containing a magenta pigment as a colorant, wherein the magenta ink composition shows a maximum chroma C* on a recording medium of 60 or higher, a hue angle H.sup.0 at the maximum chroma of from 340.degree. to 360.degree. and a color difference .DELTA.E* of 5 or smaller as measured through 100-hour irradiation with xenon lamp light at a luminous energy of 0.35 W/m.sup.2 and a wavelength of 340 nm.