An inkjet ink composition, comprising: latex polymer particles present in the ink composition in an amount ranging from about 0.5 wt% to about 40 wt%, the latex polymer particles having: a T g ranging from about -40°C to about 125°C; and up to about 100% of total cross-linkable sites being present: on surfaces of the latex polymer particles; throughout a bulk of the latex polymer particles; or combinations thereof; the latex polymer particles being formed from monomers including at least one hydrophobic monomer, at least one acidic monomer, at least one reactive surfactant, and at least one crosslinkable monomer, the at least one crosslinkable monomer including at least one keto group, and having the general formula where: R1 = H or CH 3; X = Y = a divalent hetero atom linking group, e.g. O, NH, S or just a bond; R2 = R3 = a divalent linking group, e.g. alkylene (CH 2 CH 2) or arylene; and R4 = an alkyl, aryl or substituted alkyl/aryl group; wherein the at least one hydrophobic monomer is present in an amount ranging from 70 wt% to 98 wt% of the monomers and is selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, octadecyl methacrylate, isobornyl methacrylate, vinyl acetate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, octadecyl acrylate, isobornyl acrylate, styrene, and combinations thereof; at least one cross-linker compound selected from the group consisting of adipic acid dihydrazide, ethylene diamine, propylene diamine, or combinations thereof; at least one colorant; and at least one aqueous solvent; wherein the latex polymer particles are configured to form a crosslinked latex polymer film at least one of during or after depletion of the at least one aqueous solvent from the latex polymer particles after the ink composition is applied by inkjet printing onto a medium. latex polymer particles present in the ink composition in an amount ranging from about 0.5 wt% to about 40 wt%, the latex polymer particles having: a T g ranging from about -40°C to about 125°C; and up to about 100% of total cross-linkable sites being present: on surfaces of the latex polymer particles; throughout a bulk of the latex polymer particles; or combinations thereof; a T g ranging from about -40°C to about 125°C; and up to about 100% of total cross-linkable sites being present: on surfaces of the latex polymer particles; throughout a bulk of the latex polymer particles; or combinations thereof; the latex polymer particles being formed from monomers including at least one hydrophobic monomer, at least one acidic monomer, at least one reactive surfactant, and at least one crosslinkable monomer, the at least one crosslinkable monomer including at least one keto group, and having the general formula where: R1 = H or CH 3; X = Y = a divalent hetero atom linking group, e.g. O, NH, S or just a bond; R2 = R3 = a divalent linking group, e.g. alkylene (CH 2 CH 2) or arylene; and R4 = an alkyl, aryl or substituted alkyl/aryl group; wherein the at least one hydrophobic monomer is present in an amount ranging from 70 wt% to 98 wt% of the monomers and is selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, octadecyl methacrylate, isobornyl methacrylate, vinyl acetate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, octadecyl acrylate, isobornyl acrylate, styrene, and combinations thereof; at least one cross-linker compound selected from the group consisting of adipic acid dihydrazide, ethylene diamine, propylene diamine, or combinations thereof; at least one colorant; and at least one aqueous solvent; wherein the latex polymer particles are configured to form a crosslinked latex polymer film at least one of during or after depletion of the at least one aqueous solvent from the latex polymer particles after the ink composition is applied by inkjet printing onto a medium. R1 = H or CH 3; X = Y = a divalent hetero atom linking group, e.g. O, NH, S or just a bond; R2 = R3 = a divalent linking group, e.g. alkylene (CH 2 CH 2) or arylene; and R4 = an alkyl, aryl or substituted alkyl/aryl group; wherein the at least one hydrophobic monomer is present in an amount ranging from 70 wt% to 98 wt% of the monomers and is selected from the group consisting of methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, octadecyl methacrylate, isobornyl methacrylate, vinyl acetate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, octadecyl acrylate, isobornyl acrylate, styrene, and combinations thereof; at least one cross-linker compound selected from the group consisting of adipic acid dihydrazide, ethylene diamine, propylene diamine, or combinations thereof; at least one colorant; and at least one aqueous solvent; wherein the latex polymer particles are configured to form a crosslinked latex polymer film at least one of during or after depletion of the at least one aqueous solvent from the latex polymer particles after the ink composition is applied by inkjet printing onto a medium.