US Patent 7077516 Inkjet printing method

An ink jet printing method, including the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading said printer with an ink jet recording element, having a non-absorbing substrate; C) loading said printer with an ink jet ink composition having an aqueous ink jet ink composition comprising: a pigment; a heat sensitive ionomer; at least one surfactant; and a humectant; wherein the ionomer is a charged polymer having at least 5 mol % of the recurring units negatively or positively charged, and D) printing on said ink jet recording element accompanied by a heating step using said ink jet ink composition in response to said digital data signals.