Fujifilm Corporation

Yuko Saito

Naotaka Wachi

Ryuji Shinohara

The present invention provides an ink jet recording ink including a dye which has a weight average molecular weight of 850 or less and is represented by Formula (1) below, a water-soluble organic solvent which has an SP value of 9.4 or more and less than 9.75 and is represented by Formula (2) or (3) below, and water, in which the content of a surfactant is less than 0.1% by mass. R, R: H, a halogen atom, OH, COOH, C1-C6 alkyl group, C1-C6 alkoxy group, NO, an azophenyl group, -L1-Ra and the like, L: O, CH, CH, N&#x2550;N, SOor a combination thereof, Ra: a phenyl group, a naphthyl group, or the like, R: H, an azophenyl group, an azonaphthalene group, -L-Rb or the like, L: C(&#x2550;O), CH, N&#x2550;N, NH, SOor a combination thereof, Rb: a phenyl group, a naphthyl group, a pyrimidyl group, or the like; M: H, Na, NH, an alkylammonium ion or the like, R: C2-C6 unsubstituted alkyl group, and n is 1 to 3. 

Ink jet recording ink

This invention provides an ink composition comprising at least a dye represented by the following Formula (1), monohydric alcohol having 1 to 5 carbon atoms, and urea: wherein G represents a heterocyclic group; n represents an integer from 1 to 3; when n is 1, R, X, Y, Z, Q, and G each represent a monovalent group; when n is 2, R, X, Y, Z, Q, and G each represent a monovalent or divalent substituent, in which at least one of R, X, Y, Z, Q, or G represents a divalent substituent; and when n is 3, R, X, Y, Z, Q, and G each represent a monovalent, divalent, or trivalent substituent, in which at least two of R, X, Y, Z, Q, or G represent a divalent substituent or represent a trivalent substituent.

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Kanagawa, Japan

Yuko Saito