Patent ID: 8778071

Claim:
An inkjet ink set comprising: at least a black ink; a cyan ink; a magenta ink; and a yellow ink, wherein each of the black, cyan, magenta and yellow inks includes: at least a water-soluble dye; water; and a water-soluble solvent having the following formula (1): wherein R represents a linear alkyl group having 1 to 5 carbon atoms, and wherein each of the cyan, magenta and yellow inks satisfies a relationship, 1.5≦S/W≦3.5, wherein S represents a content of the water-soluble solvent in each ink, and W represents a content of water in each ink, and the black ink satisfies another relationship, 1.0≦S/W≦1.5, wherein S represents a content of the water-soluble solvent in the black ink, and W represents a content of water in the black ink.