Loading patent…
AssigneeEastman Kodak Company
InventorsAlexandra DiLauro Bermel, Brian L Lindstrom, David John Nelson, Allan Francis Sowinski, David Louis Jeanmaire, Todd Russell Griffin
Estimating the term…
An aqueous inkjet ink set for use in continuous inkjet printing comprising at least one cyan ink, at least one yellow ink, at least one magenta ink, and at least one black ink, wherein each ink of the ink set comprises dispersed pigment particles and at least one surfactant selected to provide a 10-ms dynamic surface tension of less than 54 mN/m for each ink. The invention relates to continuous ink jet printing of aqueous pigmented ink compositions recycled from main ink supply reservoirs, employing a printer with drop ejectors and a drop deflector and non-printing drop catchers capable of returning unprinted ink to the fluid delivery systems following the capture of non-printing drops. The pigmented ink jet ink compositions provide for particularly suitable fluid properties on the drop catcher face that minimize printing defects that can occur during drop deflection during the printing of high dynamic range images at high speed.
An aqueous ink set for continuous inkjet printing comprising at least one cyan ink, at least one yellow ink, at least one magenta ink, and at least one black ink, wherein each ink of the ink set comprises dispersed pigment particles and the said cyan, yellow, magenta, and black pigment particles are dispersed with a polymeric dispersant, and at least one surfactant selected to provide a 10-ms dynamic surface tension of less than 54 mN/m for each ink, wherein each of the inks are comprised of less than 10 wt % of humectant and co-solvent and have a static surface tension of at least 35 mN/m, wherein the said cyan, yellow, magenta, and black inks each have a dynamic fluid viscosity of less than about 2.0 mPa-s, wherein at least one of the cyan, yellow, magenta, and black inks comprises a water soluble homopolymer or co-polymer additive distinct from any dispersant used to disperse the pigment particles, and wherein the polymer additive is present in an amount of from 0.05% to 5% by weight effective to stabilize the ink composition against particle aggregation caused by pumping the ink composition through a continuous ink jet printing fluid system.
Dependencies are inferred from the claim text.