Ink jet printing method

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 ink-receptive elements comprising a support having thereon a porous ink-receptive layer,
• C) loading said printer with an ink jet ink composition comprising water, a humectant, and a water-dispersible polymeric latex having contained therein a practically water-insoluble delocalized cationic azo dye which has solubility in water less than about 0:1 g/l at 25° C. and solubility in organic solvents greater than or equal to about 0.2 g/l and is derived from the quaternization of a nitrogen heterocyclic azo dye wherein said delocalized cationic azo dye has the following formula:
• wherein:
• Z represents the atoms necessary to complete a nitrogen-containing heterocyclic ring containing 2 or 3 nitrogen atoms and the balance carbon atoms;
• R1 and R2 each independently represents hydrogen or a substituted or unsubstituted alkyl group of 1 to about 6 carbon atoms;
• R4, R5 and R6 each independently represents the same substituents as R1 and R2, halogen, cyano, substituted or unsubstituted alkoxy, acyl, benzoyl or alkoxycarbonyl;
• with the proviso that at least one of R4, R5 and R6 represents a substituted or unsubstituted alkyl group of 1 to about 6 carbon atoms attached to a nitrogen atom;
• R3 represents the same groups as R4, R5 and R6;
• hydroxy;
• a polyoxyalkylene group of 2-20 alkylene oxide residues;
• carboxy or sulfo or phospho ester, carbamoyl;
• substituted or unsubstituted alkyl-, aryl-aralkyl-, diaryl- or dialkyl-carbamoyl of 1 to about 20 carbon atoms;
• sulfamoyl;
• substituted or unsubstituted alkyl-, aryl-, aralkyl-, diaryl- or dialkyl-sulfamoyl of 1 to about 20 carbon atoms;
• acylamino;
• sulfonylamino;
• amino;
• a substituted or unisubstituted alkyl-, aryl-, aralkyl-, diaryl- or dialkylamino-of 1 to about 20 carbon atoms;
• or a quaternary ammonium or phosphonium group;
• or may be combined with R2 to form a carbocyclic orheterocyclic 5 or 6 membered ring;
• n is 1 except when Z represents the atoms necessary to complete a nitrogen-containing heterocyclic ring containing 3 nitrogen atoms, in which case n is 0;
• and
• X represents a counterion of BF4−, OTs−, PF6−, C12H25SO3−or ClO4−;
• with the proviso that when Z represents the atoms necessary to complete a nitrogen-containing heterocyclic ring of 3 nitrogen atoms, then R3 is combined with R2 to form a carbocyclic or heterocyclic 5 or 6 membered ring;
• and
• D) printing on an ink-receptive substrate using said ink jet ink in response to said digital data signals.