Black coloran for ink-jet printing ink, ink-jet printing ink, and aqueous pigment dispersion containing the black colorant

摘要

A black colorant suitable for ink-jet printing ink, having an average particle diameter of 0.001 to 0.15 mu m, and comprising: an extender pigment as a core particle; a gluing agent-coating layer formed on at least a part of the surface of the core particle; and a black pigment coat formed on at least a part of the gluing agent-coating layer. The black colorant for ink-jet printing ink exhibits not only a high blackness and an excellent tinting strength, but also excellent dispersibility and light resistance in spite of fine particles.