PURPOSE: The titled magenta composition, containing a specific water-soluble dye as a colorant, having inmproved water and the light resistance after recording without causing clogging, and suitale for printing, writing utensils, recorders and stamping.
CONSTITUTION: An aqueous ink composition containing a water-soluble dye of formula I [R 1 and R 2 are H, OH or (substituted) amino; R 2 and R 3 are H, alkyl alkoxyl or halogen; X is cation such as H, Na, K or Li or organic amine; n is an integer 1, 2, or 3], e.g. the compound of formula II, as a colorant in an amount of preferably 1.5W6pts.wt. based on 100pts.wt. ink. 5W30pts.wt. wetting agent, e.g. diethylene glycol, and sodium dehydroacetate as an antifungal agent are, if necessary, added thereto.