Patent ID: 7445666

Claim:
An ink jet ink for use together with a pigment ink, wherein: the ink jet ink comprises a coloring material, a polyvalent metal and a water-soluble organic solvent; the coloring material comprises at least a compound represented by the following general formula (I); a content (mol/g) of the polyvalent metal is 2.0×10 −6 mol/g or more and 4.0×10 −4 mol/g or less; a total content (mass %) of the water-soluble organic solvent is 25.0 mass % or more with respect to the total mass of the ink; and in a dispersion distance distribution, measured by a small angle X-ray scattering method, of molecular aggregates in the ink jet ink whose coloring material concentration is adjusted to 0.5 mass %, a dispersion distance d 25 value corresponding to 75% of a distribution is 12.60 nm or less: wherein, M represents an alkali metal or ammonium; R 1 and R 2 each independently represent a hydrogen atom, a sulfonate group or a carboxyl group, provided that R 1 and R 2 are not simultaneously a hydrogen atom; Y represents a chlorine atom, a hydroxyl group, an amino group or a mono- or di-alkylamino group;1=0 to 2, m=1 to 3 and n=1 to 3, provided that l+m+n=3 to 4; and a substitution position of a substituent is one of 4-position and 4′-position.