The present disclosure provides an aqueous ink jet ink comprising an ink vehicle and an aqueous dispersion, wherein the aqueous dispersion comprises a solid particle and a polymeric dispersant that has been crosslinked, wherein the polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment having a block size of about 5 to about 18 units, and comprises at least 50% by weight of a monomer, having the following structure: CH2═CRC(O)O(CHR1CH2O)nR2 wherein R and R1 are H, or methyl R2 is alkyl of 1-4 carbon atoms or phenyl and n is about 1 about 20 and the B block is a segment comprising an ionic monomer and at least one hydrophobic monomer and wherein the dispersant comprises a crosslinkable moiety wherein the crosslinkable moiety is crosslinked with a crosslinking agent selected from the group consisting of epoxide, carbodiimide, oxazoline, isocyanate, and silane and wherein the aqueous dispersion has a pH of at least about 8.0. The disclosure further pertains to a printer comprising the aqueous ink jet ink of this disclosure that provides images with the requisite optical density and chroma needed for emerging ink jet applications.
