Ink-jet inks for improved print quality

Compositions: coating or plastic – Coating or plastic compositions – Marking

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106 3143, 106 3147, 106 3157, 106 3158, 106 3159, C09D 1102

Patent

active

059353090

ABSTRACT:
An ink-jet ink composition for ink-jet printing and a method using the same is disclosed, the ink composition comprising an aqueous liquid vehicle, at least one zwitterionic surfactant; and at least one amphiphilic dye, said at least one amphiphilic dye comprising a plurality of amphiphilic dye molecules, each of said amphiphilic dye molecules consisting essentially of a chromophore and at least one hydrophobic arm attached thereto, said at least amphiphilic dye being present in said ink-jet ink composition in an amount that is at least equal to its critical micelle concentration. The ink compositions of the present invention provide enhanced waterfastness and optical density.

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