Patent ID: 8569394

Claim:
An ink set comprising a plurality of active light-curable ink compositions, including: a yellow ink composition comprising a yellow color material having an absorption peak in a wavelength region of 370 to 390 nm, a polymerizable compound and a polymerization initiator having an absorption peak in a different wavelength region from the yellow color material, the polymerization initiator for the yellow ink composition comprising isoamino-P-dimethylaminobenzoate ester, α-aminoalkylphenone, oxime ester, or aminobenzoate, wherein when the absorbance of the absorption peak of the yellow color material is defined to be 1, the absorption peak of the polymerization initiator of the yellow ink composition lies in a wavelength region where the yellow color material exhibits an absorbance of 0.6 or less; a magenta ink composition comprising a magenta color material having an absorption peak in a wavelength region of 550 to 570 nm, a polymerizable compound and a polymerization initiator having an absorption peak in a different wavelength region from the magenta color material, the polymerization initiator for the magenta ink composition comprising thioxanthone, wherein when the absorbance of the absorption peak of the magenta color material is defined to be 1, the absorption peak of the polymerization initiator of the magenta ink composition lies in a wavelength region where the magenta color material exhibits an absorbance of 0.5 or less; and a cyan ink composition comprising a cyan color material having an absorption peak in a wavelength region of 330 to 350 nm, a polymerizable compound and a polymerization initiator having an absorption peak in a different wavelength region from the cyan color material, the polymerization initiator for the cyan ink composition comprising α-hydroxyalkylphenone or anthraquinone, wherein when the absorbance of the absorption peak of the cyan color material is defined to be 1, the absorption peak of the polymerization initiator of the cyan ink composition lies in a wavelength region where the cyan color material exhibits an absorbance of 0.6 or less.