| abstract |
As aqueous ink composition is provided having up to 5 wt. % of a colorant of the formula: n n A--{Y--X--C(O)--R.sub.1 --C(O)O.sup.- }.sub.p n n where A is an organic chromophore; Y is a polyoxyalkylene substituent; X is a radical of a reactive hydroxy, amino or thio group; and R 1 is C 2-30 , substituted or unsubstituted alkylene, alkenylene, or phenylenealkylene. A counter ion selected from alkaline metal ions, alkaline earth metal ions, ammonium ions, amine salts, and zinc ammonium complexes is present in approximately stoichiometric proportion or greater relative to the colorant in the ink composition. |