| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an ink composition capable of producing a colored image having excellent light resistance without deteriorating color tone by compounding a coloring agent and a specific compound. SOLUTION: This ink composition is obtained by compounding (A) a coloring agent (preferably, an aqueous dye such as a xanthene dye, an azomethine dye or an azo dye) and (B) a compound of the formula, (R1 R2 NOH)n (M)m [R1 and R2 each independently H, an alkyl, an alkoxy, an alkoxycarbonyl, a carbamoyl or an acyl; (n) is an integer of 1-3: (m) is an integer of 0-2; M is a pairing salt]. Further, the component B is added preferably in an amount of 0.01-15wt.% based on the total weight of the ink. The formula, HON(CH2 CH2 SO3 Na)2 , (HONH2 )2 H2 SO4 , HON(CH2 CH3 )2 , etc., is cited as a concrete example of the component B.</p> |
