Patent ID: 8733920

Claim:
An inkjet recording ink, comprising: water; a water-soluble organic solvent; a colorant; and a surfactant, wherein the colorant contains a surfactant-dispersible pigment (A) which is dispersed by the surfactant, and a resin-coated pigment (B), and wherein the surfactant is a surfactant having an HLB value of 12 or higher, selected from the group consisting of anionic surfactants represented by the following formula (1): R 1 —O—(CH 2 CH 2 O) m -A (1) where R1 is a C2-C24 alkyl group, alkenyl group, alkylphenyl group, or alkylallyl group; A is —COOM1, —SO 3 M2, or —PO(OM3)OM4, where M1 and M4 are each independently alkali metal, quaternary ammonium, quaternary phosphonium, or alkanolamine, M2 is alkali metal, quaternary phosphonium, or alkanolamine, and M3 is a hydrogen atom or R 2 (CH 2 CH 2 O)n with proviso that R 2 is a C1-C4 alkyl group, alkenyl group, alkylphenyl group, or alkylallyl group, and n is an integer of 4 to 20; and m is and integer of 15 to 40.