printing system providing increased wet spot resistance and method for producing a printed image having increased wet spot resistance

摘要

"PRINTING SYSTEM PROVIDING INCREASED WET-SPEED RESISTANCE AND METHOD FOR PRODUCTING A PRINTED IMAGE HAVING INCREASED WET-SPEED RESISTANCE". Printing system for use in inkjet printing. The printing system comprises an inkjet printing ink having a free binder and a modified pigment, a fixing fluid, and a porous printing medium. The free binder may include polymers selected from a poly (ethylene imine), a polyguanide, a styrene / maleic anhydride / imide, a quaternary ammonium compound, a styrene acrylic polymer, a styrene / maleic anhydride polymer, a polyurethane, and mixtures thereof. The at least two polymers may be present in a molecular weight ratio ranging from approximately 0.001 to approximately 10. A method for producing a printed image having increased wet spot resistance is also disclosed. The method comprises providing a porous print medium, applying an inkjet print ink to the porous print medium, and applying a fixing fluid to the porous print medium.