Production method of the azo pigment and the azo pigment, dispersed ones which include the azo pigment, and the Bragg angle

摘要

PROBLEM TO BE SOLVED: To provide an azo pigment which gives good stability to pigment-containing dispersion and ink liquid, and includes an excellent tint and optical density, and preferably a longitudinal length of which is 0.01-30 μm, when measured using a transmission microscope.;SOLUTION: This azo pigment is a compound represented by formula (1), in which the Bragg angle (2θ±0.2°) in CuKα characteristic X-ray diffraction includes its own X-ray diffraction peak at 6.6° and 25.7°, and its tautomer.;COPYRIGHT: (C)2010,JPO&INPIT