Composition and method of making an aqueous magnetic ink character recognition inkjet ink

摘要

An aqueous MICR inkjet ink includes between 20% to 60% by weight of a magnetic iron oxide with cobalt doping, pigment dispersion, mixed with between 5% to 30% by weight of a humectant, in a water solution emulsion. The dispersion is milled in a wet media mill to obtain particle size in the 150 nm range. Additional humectant, surfactants, jetting agents, and stabilizing additives are added for the final ink composition.

主权项

1. A method of making an aqueous MICR inkjet ink comprising:
mixing a magnetic iron oxide with cobalt doping pigment with humectant, polymeric dispersant and water to create an emulsion containing, magnetic iron oxide with cobalt doping pigment at about between 20% to 60% by weight, a polymeric dispersant, and humectant at about between 5% to 30% by weight; milling the emulsion in a wet media mill to obtain a particle size less than 200 nm; and adding additional humectant, surfactant and/or solvent to the milled mixture in quantities that do not dilute the amount of pigment in the inkjet ink.