| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ink set having extremely high image durability, an ink cartridge, and an inkjet recording ink cartridge. <P>SOLUTION: The ink set comprises two or more ink compositions which are in the same hue region, and the ink compositions comprises at least a dye, and at least one of the above ink compositions comprises at least one polymer selected from the group consisting of an oxidation-resistant polymer, an association promoting polymer, and an aminic polymer which have a mass average molecular weight of ≥3,000, and when the above ink set has n types of ink compositions which are in the same hue region and the color density of the n-th ink composition is taken as a<SB>n</SB>and the content of the above polymer present in the ink composition is taken as b<SB>n</SB>(b<SB>n</SB>≥0), the color density (each of a<SB>1</SB>to a<SB>n</SB>) of each ink composition and the content (each of b<SB>1</SB>to b<SB>n</SB>) of the above polymer present in the ink composition meet the formulae: a<SB>1</SB><a<SB>2</SB>to <a<SB>n</SB>and b<SB>1</SB>>b<SB>2</SB>≥ to ≥b<SB>n</SB>. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
