C.I. PIGMENT YELLOW 74 (INSOLUBLE AZO PIGMENT) AND COLORING COMPOSITION USING SAME

摘要

Provided is a C.I. Pigment Yellow 74 which is an insoluble azo pigment and is characterized in that: the ratio (26.6°/11.7°) of a 26.6° peak diffraction intensity to an 11.7° peak diffraction intensity in a Bragg angle (2?±0.2°) measured by x ray powder diffraction using a CuK a ray is 0.85 1.12; and the average primary particle diameter of crystalline particles thereof is 20 130nm. As a result it is possible to provide a coloring composition that exhibits excellent dispersibility when used as a coloring agent and favorable particle diameter stability and storage stability in comparison to conventional pigments. Furthermore by using the coloring composition it is also possible to achieve image formation (recording) that exhibits excellent clarity and transparency at a high level not attainable using the prior art.