BORON SUBPHTHALOCYANINE PIGMENT

摘要

The present invention can provide a novel pigment useful in color image displays to form blue pixels capable of providing high-level brightness and saturation, especially a finely-divided pigment which has a bright hue and is excellent in pigment physical properties such as light fastness, solvent resistance and heat resistance, a process for producing the same, a pigment dispersion making use of the pigment, and an ink for color filters. The novel pigment is produced by forming into a pigment a subphthalocyanine represented by the following formula (1):
wherein X is a halogen atom, presents diffraction peaks at diffraction angles (2¸) of at least 7.0°, 12.3°, 20.4° and 23.4° in x-ray diffraction, and has an average particle size of 120 to 20 nm.