The ink set for inkjet recording and an inkjet recording method in the present invention, which can provide a recorded image having high quality and ensure that the obtained image can maintain the image quality with less change in the color balance even when stored in an oxidative atmosphere, and which includes at least three kinds of inkjet inks, each of which includes a coloring agent dissolved or dispersed in an aqueous or oily medium and has a maximum absorption spectrum in a spectral absorption region different from each other, wherein, when a photographic printing is performed on a reflection-type image-receiving medium using the ink set and a forced discoloration rate constant with an ozone gas of each ink is determined in each printed region of said at least three kinds of inks, the ratio of any two of the forced discoloration rate constants is from 0.5 to 2.0.
An ink set comprising: at least two kinds of inks, each of the at least two kinds of inks having a common hue and different densities, and containing an aqueous medium and a dye, wherein each of the at least two kinds of inks has a corresponding discoloration velocity constant (k) for an image printed with each one of the at least two kinds of inks, and a ratio defined by a minimum value (k.sub.min) selected from among said corresponding constants divided by a maximum value (k.sub.max) selected from among the corresponding constants, is within a range of 0.7 to 1.0.
Provided are an inkjet ink prepared by dissolving or dispersing a specific dye in an aqueous medium and containing one of at least one alkylene diol where one alkylene group has at least 3 carbon atoms or homologue thereof and at least one polymer compound; and an ink set containing an ink including a specific dye and an ink including one compound capable of interacting with the dye; thereby being able to provide an ink and the like having a good jet-out stability, and forming images of good quality with neither beading nor bronzing, and the images formed of the inks have good fastness to heat, light and ozone.
An ink obtained by dissolving at least one specific dye in an aqueous medium, wherein the dyes contained in the ink all have a solubility of 15 g or more in 100 g of water at 25.degree. C. under atmospheric pressure; and an ink set formed from the ink. The dye is preferably a dye having an oxidation potential of 1.0 V (vs SCE) or more, more preferably a specific azo dye having a heterocyclic group of a specific structure or an aromatic group which is bound directly to an azo group, or a specific phthalocyanine dye having a water-soluble group as a substitunet. According to the present invention, an ink, specifically an inkjet ink, and an ink set, which can print an image without disorder or beading due to ejection failure and ensure excellent ejection stability and durability, is provided.
