Patent ID: 8197584

Claim:
A curable pigment inkjet ink set comprising: a cyan inkjet ink; a yellow inkjet ink; and a magenta inkjet ink; wherein the yellow inkjet ink having ABS(Y) 500-530 <5 and ABS(Y) 400-500 >60 includes one or more yellow pigments; the cyan inkjet ink includes one or more β-copper phthalocyanine pigments; the magenta inkjet ink contains a mixed crystal such that a first quinacridone and a second quinacridone enter into a same crystal lattice in a ratio of the first quinacridone over the second quinacridone and such that ABS(M) 500-530 >20 and ABS(M) 500-600 >60; ABS(Y) 500-530 represents an absorbance of the yellow inkjet ink between 500 and 530 nm in a normalized absorption spectrum of the yellow ink; ABS(M) 500-530 represents an absorbance of the magenta inkjet ink between 500 and 530 nm in a normalized absorption spectrum of the magenta ink; ABS(Y) 400-500 represents an absorbance of the yellow inkjet ink between 400 and 500 nm in a normalized absorption spectrum of the yellow ink; ABS(M) 500-600 represents an absorbance of the magenta inkjet ink between 500 and 600 nm in a normalized absorption spectrum of the magenta ink; ABS(X) wL1-WL2 represents a peak area between wavelengths WL 1 and WL 2 calculated by summation of the normalized absorbance values in the range WL 1 to WL 2 which are obtained by multiplying the absorbance values at each wavelength in the range from 380 nm to 850 nm by the reciprocal value of the maximum absorbance A max in the range of 380 nm to 850 nm using a spectrophotometer with an interval of 1 nm on the ink X diluted in ethyl acetate to a pigment concentration of 40 ppm; the cyan, yellow, and magenta inkjet inks of the curable pigment inkjet ink set are curable by exposure to actinic radiation and/or electron beam curing; and each of the cyan, yellow, and magenta inkjet inks includes at least a pigment, a dispersant, and a polymerizable compound.