CLEANING FORMULATION FOR POLYQUAT-ANIONIC DYE BASED INKS FOR THERMAL INK JET PRINTING
Original Publication Date: 2001-Jun-30
Included in the Prior Art Database: 2004-Apr-09
Xerox Disclosure Journal
Disclosed is a halide salt based cleaning formulation which is particularly effective for cleaning polyquaternary (such as the cationic conductive polyquats available from Calgon Corp.) anionic dye based ink formulations and which inks are used, for example, in thermal ink jet and related printing devices. An exemplary cleaning formulation comprises, for example, water or mixtures of water and another suitable polar and miscible solvent, and about 1 to about 20 weight percent halide salt, such as sodium chloride, ammonium bromide, and the like, halide salts. Further solubilizing and cleaning power is obtainable by including other polar cosolvent additives, such as, sulfolane (lo%), urea (20%), or other similar materials. The cleaning formulation is particularly well suited for cleaning ink jet parts, such as print heads and maintenance stations, and for cleaning up ink spills or cleaning other articles following inadvertent contact. The cleaning formulation can be adapted for use with other pigmented, non-pigmented, and other colorant water based inks.