Abstract: An ink composition can include water, from 1 wt % to 6 wt % organic pigment, from 0.1 wt % to 3 wt % styrene acrylic resin dispersant having an acid number ranging from 100 mg KOH/g to 160 mg KOH/g, and from 1 wt % to less than 5 wt % organic co-solvent.

Abstract: An ink composition can include water, from 1 wt % to less than 5 wt % organic solvent, from 0.3 wt % to 2 wt % of a graft polyurethane copolymer, and from 1 wt % to 6 wt % pigment.

Abstract: The present disclosure is drawn to ink-jet ink sets, as well as related systems and methods. In one example, an ink set for ink-jet printing can comprise a cyan ink-jet ink including from about 2 wt % to about 5 wt % of a cyan pigment admixed in a first ink vehicle; a magenta ink-jet ink including a magenta colorant comprising from about 2 wt % to about 5 wt % of a magenta pigment and about 0.1 wt % to about 1 wt % of a slightly soluble magenta dye admixed in a second ink vehicle; and a yellow ink-jet ink including from about 2 wt % to about 5 wt % of a yellow pigment admixed in a third ink vehicle.

Abstract: An ink composition includes an aqueous dispersion of particles of a first material and separate particles of a second material. The first material contains an oxide, sulfide, or selenide of a magnetic metal. The ink is formulated to exhibit, after application to a solid substrate, a degree of metallic luster enhanced by the presence of the second material.

Abstract: The present disclosure is drawn to ink-jet ink sets, as well as related systems and methods. In one example, an ink set for ink-jet printing can comprise a cyan ink-jet ink including from about 2 wt % to about 5 wt % of a cyan pigment admixed in a first ink vehicle; a magenta ink-jet ink including a magenta colorant comprising from about 2 wt % to about 5 wt % of a magenta pigment and about 0.1 wt % to about 1 wt % of a slightly soluble magenta dye admixed in a second ink vehicle; and a yellow ink-jet ink including from about 2 wt % to about 5 wt % of a yellow pigment admixed in a third ink vehicle.

Abstract: An ink composition includes an aqueous dispersion of particles of a first material and separate particles of a second material. The first material contains an oxide, sulfide, or selenide of a magnetic metal. The ink is formulated to exhibit, after application to a solid substrate, a degree of metallic luster enhanced by the presence of the second material.