Patent ID: 6790878
Filing Date: 2004-09-14
Classification: C09D

Abstract:
An aqueous ink for an ink-jet printing process comprising:a self-dispersing pigment and a resin encapsulating a coloring material, both of which are dispersed in an aqueous medium such that the total amount of the solid concentration of the self-dispersing pigment and the resin encapsulating a coloring material is 8 percent by weight based on the total weight of the ink, the resin encapsulating the coloring material being contained in a sufficient amount to provide rub-resistance to an image produced with the ink, wherein the ink provides an ink jet recorded image with a certain optical density that is equivalent to that produced with an ink containing the self-dispersing pigment as a sole colorant at the solid concentration of 8 percent, and wherein the encapsulated coloring material is an oil-soluble dye or a water-insoluble pigment.