Patent ID: 7645035

Claim:
An ink set comprising: a recording liquid composed of a black recording liquid and a color recording liquid, the black recording liquid and the color recording liquid each including a resin-coated anionic colorant and a water-soluble solvent which contains a humectant and a penetrant; and a treatment liquid including a cationic particle and a water-soluble solvent which contains a humectant and a penetrant, wherein the cationic particle has reactivity with the resin-coated anionic colorant and is made of a cationic inorganic material, wherein the recording liquid has a viscosity of 5 mPa·sec or more at 25° C. and the treatment liquid has a viscosity of 5 mPa·sec or more at 25°C. and the resin-coated anionic colorant is selected from one of carbon black having carboxyl group or sulfonic group and pigment in which carboxyl group or sulfonic group is introduced.