Patent ID: 7806970

Claim:
An ink jet ink comprising water, coloring materials, and a water-soluble organic solvent, wherein the coloring materials comprise (a) at least one dye selected from the group consisting of C.I. Direct Blue 199, C.I. Direct Blue 86, and C.I. Acid Blue 9, and (b) a pigment having a copper phthalocyanine skeleton, wherein the water-soluble organic solvent comprises a poor medium for the pigment having the copper phthalocyanine skeleton, wherein a content of the pigment having the copper phthalocyanine skeleton in the ink is less than 1 mass % with respect to a total mass of the ink jet ink, and wherein the following condition is satisfied: 7%≦( A/D )×100%≦24.3% where A is the content in mass % of the pigment having the copper phthalocyanine skeleton in the ink jet ink with respect to the total mass of the ink jet ink, and D is the content in mass % of dye in the ink jet ink with respect to the total mass of the ink jet ink.