| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the subject composition high in the solubility of a dye, excellent in stability with time and not causing the clogging of ink jet printer heads by dissolving the specific red dye in an amide organic solvent aqueous solution. SOLUTION: This red ink composition is produced by dissolving (B) a monoazo anionic red dye in (A) an amide solvent aqueous solution. The component A is an active hydrogen-free compound such as N-methylpyrrolidone and is contained in an amount of 5-30wt.%. The component B is preferably contained in a concentration of 1-10%, and is preferably a phenylazonaphthalene anionic red dye of the formula [R1 is H, a halogen, phenylsulfone, etc.; R2 is a halogen, trifluoromethyl, etc.; M<-> is a cation).</p> |
