Patent ID: RE44863

Claim:
An ink comprising a pigment, wherein the pigment comprises a solid solution of C.I. Pigment Red 202 and C.I. Pigment Violet 19, and a primary particle diameter D (nm) of the pigment and a 50%-cumulative diameter D 50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95≦(=<)D 50 ≦(=<)130, and a 90%-cumulative diameter D 90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D 50 (nm) satisfy a relation of 1.5≦(=<)D 90 /D 50 ≦(=<)2.2, wherein the diameter D (nm) is 50 nm or more to 130 120 nm or less.