Patent ID: 9657176
Date: 2017-05-23
CPC Classifications: C09B,C09D,G03G,Y10T

Claim:
1. A C.I. Pigment Yellow 74 as a water-insoluble azo pigment, wherein the C.I. Pigment Yellow 74 is in a form of crystalline particles, the crystalline particles of the C.I. Pigment Yellow 74 have a ratio (26.6°/11.7°) of a diffraction intensity of a peak at 26.6° to a diffraction intensity of a peak at 11.7° in terms of Bragg angle (2θ±0.2°) in a range from 0.85 to 0.99, as measured by powder X-ray diffraction using CuK α-radiation, the crystalline particles have an average primary particle size in a range from 20 to 130 nm, the crystalline particles have an average value of length ratios (major axes/minor axes) of major axes to minor axes of the crystalline particles in a range from 1.00 to 1.50, and an inkjet ink image of an inkjet ink comprising the C.I. Pigment Yellow 74 has weather resistance in a range of 70% or more of a reflection density ratio of a reflection density of the inkjet ink image after irradiation of UV light relative to a reflection density of the inkjet image before the irradiation,