| 摘要 |
PURPOSE:To obtain the recording solution useful for ink-jet recording and writing tools, having magenta color, excellent printing concentration, light resistance, water resistance and shelf stability, containing an aqueous medium and a coloring matter having a specific free acid type. CONSTITUTION:This recording solution contains (A) an aqueous medium and (B) at least one coloring matter selected from coloring matters having a free acid type of formula I {R1, R2, R3, R8, R9 and R10 are 1-9C (substituted) alkyl, 1-9C alkoxy, halogen, H, hydroxy, (substituted)carbamoyl, etc.; (m) and (n) are 0, 1 or 2; R4, R5, R6 and R7 are H, 1-18C (substituted)alkyl, 1-18C (substituted) alkenyl, etc., with the proviso that at least one of R4 to R7 is a group replaced with 1-4 carboxyls (preferably 3-18C alkylcarboxylic acid, acrylcarboxylic acid, etc.); Y is bifunctional bond group [preferably 2-18C (substituted) aliphatic, (substituted) phenylene, naphthalene carbonyl, etc.:}. For example, a coloring matter of formula II may be cited as the component B. |
