Patent ID: 6511169
Filing Date: 2003-01-28
Classification: C09D

Abstract:
An ink jet printing method, comprising the steps of:A) providing an ink jet printer that is responsive to digital data signals; B) loading said printer with an ink-receiving element comprising a support having thereon an ink-receiving layer; C) loading said printer with an ink jet ink set for color printing comprising: (a) a yellow ink comprising a carrier and a yellow dye; (b) a magenta ink comprising a carrier and a mixture of a water-soluble, magenta anthrapyridone dye and Reactive Red 23, Reactive Red 24, Reactive Red 31, Reactive Red 120, Reactive Red 180, Reactive Red 241, Acid Red 35, Acid Red 52, Acid Red 249, Acid Red 289, Acid Red 388, Direct Red 227 or CAS No. 153204-88-7; and (c) a cyan ink comprising a carrier and a cyan dye; and D) printing on said ink-receiving layer using said ink jet ink in response to said digital data signals; wherein said magenta anthrapyridone dye is a sulfonic acid or sulfonate derivative of a compound represented by the general formula: wherein: R1 represents hydrogen, or a substituted or unsubstituted alkoxycarbonyl, carboxyl, benzoyl, alkyl, aryl, hetaryl, alkoxy or phenoxy group; R2 represents hydrogen or a substituted or unsubstituted alkyl, alicyclic, aryl or hetaryl group; R3 represents hydrogen, carboxyl, or a substituted or unsubstituted alkyl, alicyclic, aryl, hetaryl, alkoxy or phenoxy group; each X independently represents hydrogen, halogen, nitro, hydroxyl, carboxyl, or a substituted or unsubstituted alkyl, alicyclic, aryl, hetaryl, alkoxy, phenoxy, amino, amido or sulfonamido group; and n represents 0, 1, 2 or 3; said compound not containing a quatemary ammonium or phosphonium counter ion.