Patent ID: 8507713

Claim:
A method for manufacturing a pigment comprising a compound expressed by Formula (1) the method comprising: diazotizing a compound expressed by Formula (2): coupling the product of the diazotization with a compound expressed by Formula (3): and heat-treating the compound produced by the coupling at a temperature of 145° C. or more in a dry process, wherein the pigment has a number average primary particle size of 30 to 70 nm, and has a CuKα characteristic X-ray diffraction spectrum having, when θ represents a Bragg angle, a peak at 2θ±0.20° equal to 10.0° and a peak at 2θ±0.20° equal to 11.1°, the intensity ratio of the 11.1° peak to the 10.0° peak being 0.1 to 0.6.