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|1. (WO2015115569) INKJET RECORDING INK|
|Title:||INKJET RECORDING INK|
The present invention provides an inkjet recording ink comprising a dye represented by formula (1) below having a weight-average molecular weight of 850 or less, a water-soluble organic solvent represented by general formula (2) or (3) having an SP value of 9.4 or higher and less than 9.75, and water, the content of a surfactant being less than 0.1 mass%. R1, R2: H, halogen atom, OH, COOH, C1-C6 alkyl group, C1-C6 alkoxy group, NO2, azophenyl group; -L1-Ra and the like, L1: O, CH2, C6H4, N=N, SO2 or a combination thereof;Ra:phenyl group, naphthyl group; R3: H, azophenyl group, azonaphtalene group; -L2-Rb and the like, L2: C(=O), C6H4, N=N, NH, SO2 or a combination thereof; Rb: phenyl group, naphthyl group, pyrimidyl group, or the like; M: H, Na, NH4, alkyl ammonium or the like; R: C2-C6 unsubstituted alkyl group; n = 1 to 3.