| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the subject concentrate having high light resistance, water resistance and friction peel resistance and, accordingly, advantageously usable for the production of an ink for ink-jet recording by adding a specific dye at a specific ratio based on the total dye. SOLUTION: This concentrate contains 15-35wt.% of a dye based on the concentrate and 90-100wt.% of the dye is a dye of the formula (kat<+> corresponds to a t-alkylalkanoyl ammonium cation). The dye concentrate can be produced e.g. by diazotizing a flavonic acid with a nitroso ester and coupling the obtained diazonium salt to aγ-acid in water in the presence of an amine constituting the base of kat<+> . A printed material having water-resistance, light resistance and friction peel resistance can be produced by this process.</p> |
