| 摘要 |
<p>PURPOSE:To sufficiently satisfy all performance to be required in good balance and to provide an excellent color image by preparing aqueous inks of three prime color of magenta, yellow and cyan by using specific dyes, and preparing black aqueous ink. CONSTITUTION:Dye represented by a formula I as dye of magenta ink, dye represented by a formula II as dye of yellow ink, and dye represented by a formula III as dye of cyan ink are contained one or mole types each. In the formula I, R is nitro group, X is hydrogen atoms, M is alkaline metal. In the formula II, A is -NHCONH-bond, X1, X2 are phenyl group, naphthyl group, R is methyl group, n is 0 or 1, and M is alkaline metal. In the formula III, W is Cu, M is alkaline metal, m is 2 to 4, and n is O to 3. Dye represented by a formula IV is contained one or more types as dye of black ink. In the formula IV, X is phenyl group, R1 is hydrogen atoms, R2 is hydrogen atom, M is alkaline metal, and n is 0 or 1.</p> |
