GREENISH BLUE PIGMENT, COLORANT COMPOSITION CONTAINING SAID PIGMENT, AND IMAGE RECORDING MATERIAL

摘要

The purpose of the present invention is to develop a blue pigment applicable to various image recording methods, said blue pigment being capable of resolving the faults of a conventional phthalocyanine blue pigment in the formation of images and fulfilling a greenish blue color which has high saturation and excellent clearness, brightness, dispersibility, hue, tinting strength and so on. The purpose can be achieved by a greenish blue pigment which contains a pigment that is represented by general formula (I) and that exhibits a greenish blue hue with high saturation. In general formula (I), the number (m) of substituent phthalimidomethyl groups satisfies the relationship 1.0 = m = 5.0 and the number (n) of substituent sulfone groups (R1) satisfies the relationship 0.05 = n = 1.0.