| 摘要 |
<p>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; R1 and R1' are each H, alkyl. nitro, amino, halogen, or acylamino; X is H, alkyl, acyl, a phenyl group optionally substd. by -SO3M or -COON, an alkyl or hydroxyalkyl group substed. by -COOM, or a substd. triazinyl group of formula II; M is an alkali metal, an ammonium group, or an org. amine group; n is 0 or 1; and R2 and R3 are each Cl, OH, amino, or an optionally substd. lower-alkylamino, arylamino, or morpholyl group).</p> |
