| 摘要 |
PURPOSE:To obtain a black recording fluid which gives a high-quality printing and a high-density recorded image even when used for recording on a plain paper, is excellent in resistances to water and light, and has a good long-storage stability by compounding a specific black dye into the fluid. CONSTITUTION:A recording fluid contains an aq. medium and at least one member selected from dyes represented by formula I (wherein A is an optionally substd. phenylene or naphthylene group; B is a group selected from groups of formulae II to V; R1, R2, and R3 are each H, alkyl, nitro, amino, acylamino, or halogen; M is an alkali metal, an ammonium group, or an org. amine group; n is 0 or 1; R6 is a linear or branched 1-4C hydroxyalkyl group; and R7 is H or an optionally substd. alkyl group). |
