Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus

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 D50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95≦(=<)D50≦(=<)130, and a 90%-cumulative diameter D90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D50 (nm) satisfy a relation of 1.5≦(=<)D90/D50≦(=<)2.2, wherein the diameter D (nm) is 50 nm or more to 130 120 nm or less.