Patent ID: 7311393

Claim:
An inkjet recording ink comprising an aqueous medium having dissolved and/or dispersed therein at least one dye having λmax in a region of from 390 to 470 nm and having a ratio of an absorbance I(λmax+70 nm) at λmax+70 nm to an absorbance I(λmax) at λmax, namely, I(λmax+70 nm)/I(λmax), of 0.4 or less, wherein when a reflection density after printing an image with the ink on a reflective image-receiving medium is measured through a Status A blue filter and a point having a reflection density (D B ) of 0.90 to 1.10 in a yellow region is defined as an initial density of the ink and when the printed image is enforcedly discolored by using an ozone discoloration tester capable of always generating 5 ppm of ozone and an enforced discoloration rate constant is determined from a time until the reflection density decreases to 80% of the initial density, the enforced discoloration rate constant is 5.0×10 −2 [hour −1 ] or less.