Patent ID: 7497563

Claim:
A printer system, comprising: a dispensing system including a printhead, wherein the printhead includes a self-dispersed black pigment formulation in a first compartment fluidically communicating with an orifice plate and a first nozzle, wherein the printhead includes a color ink formulation in a second compartment fluidically communicating with the orifice plate and a second nozzle, wherein the first nozzle and the second nozzle are adjacent one another on the same orifice plate, wherein the self-dispersed black pigment formulation and the color ink formulation do not react with one another, wherein the self-dispersed black pigment formulation and the color ink formulation do not react with one another on the orifice plate, and where such reaction would impede ejection of the self-dispersed black pigment formulation from the first nozzle and ejection of the color ink formulation from the second nozzle.