Patent ID: 7347891

Claim:
A water base ink set for ink-jet recording comprising: a black ink containing water, a black pigment, and a water-soluble organic solvent; and a color ink containing water, a dye, an alkylamine ethylene oxide adduct and a water-soluble organic solvent, wherein: the black pigment is a negatively-chargeable and self-dispersible pigment; the dye has a fluorescein structure represented by the following formula (1); the alkylamine ethylene oxide adduct is represented by the following formula (2), in which R 1 represents an alkyl group having a number of carbons of 8 to 18, x and y are integers of not less than 1, respectively, and the sum of x and y is 5 to 15; and a water-soluble organic solvent contained in the black ink and a water-soluble organic solvent contained in the color ink are same, and the water-soluble organic solvent contained in the black ink and the water-soluble organic solvent contained in the color ink include a permeating agent, where the permeating agent contained in the black ink is present in an amount of from 20 to 50 percent by weight of the permeating agent contained in the color ink.