Inventors:
William D. Bailey - Lexington KY
Bradley L. Beach - Lexington KY
Kenneth E. Edds - Versailles KY
Donald L. Elbert - Lexington KY
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
C09D 1100
Abstract:
Disclosed is an ink for use in ink jet printers, the ink containing a water soluble dye, and a polyamine containing 7 or more nitrogen atoms per molecule, with the ink composition having a pH of 8 or above, the upper pH limit being dye decomposition dependent. The ink has improved water-fastness over an equivalent ink formulation without the polyamine additive.