| abstract |
The object of the present invention is to provide anninkjet recording ink ensuring excellent ejection stabilityneven after aging of the ink and also exhibiting excellentnweather resistance; provide an inkjet recording inknensuring less blurring of the image drawn, in addition tonexcellent ejection stability and weather resistance; andnprovide a yellow ink and a dark yellow ink, which canncontribute to realization of a pictorial quality withnexcellent color balance as a constituent ink of an ink set. n These objects of the present invention can benachieved by an inkjet recording ink comprising an aqueousnmedium containing a yellow dye, particularly, a yellow dyenrepresented by formula (1), having spectral absorptionncharacteristics such that the maximum absorption wavelengthnis in the region from 390 to 470 nm and the absorptionnlong-wave end has a tailing of a specified value or less,nand antioxidative characteristics such that the ozonenenforced discoloration rate constant is 5.0×10 -2 [hour -1 ] ornless. n Furthermore, when the ink contains a diamino compoundnrepresented by formula (A), a carbonyl group (or sulfongroup or the like)-containing cyclic compound representednby formula (B) and an organic solvent having a specificnstructure, the effect of the present invention is enhanced. |