An example of a dye discharge fluid includes a water-soluble organic solvent, a heat activated reducing agent, and water. A pH of the dye discharge fluid is less than 7. The dye discharge fluid may be used with a colored pigmented inkjet ink, a white pigmented inkjet ink, and/or a colored textile fabric, and may be included in a fluid set and/or a printing kit.

An example of a dye discharge fluid includes a water-soluble organic solvent, a heat activated reducing agent, and water. A pH of the dye discharge fluid is less than 7. The dye discharge fluid may be used with a colored pigmented inkjet ink, a white pigmented inkjet ink, and/or a colored textile fabric, and may be included in a fluid set and/or a printing kit.

Provided are an ink for an impermeable base material, including an aqueous medium and resin particles, in which a resin of the resin particles has a glass transition temperature of −40° C. or higher and 85° C. or lower, the resin has at least one selected from the group consisting of a unit (1) to a unit (3), and at least one of an acid group or a salt of the acid group, an acid value of the resin is 0.10 mmol/g or greater and 2.65 mmol/g or less, and a proportion of a solvent having a boiling point of 250° C. or higher in the aqueous medium is 3% by mass or less, and an image recording method. R.sup.2 represents a hydrogen atom or a C1 to C4 alkyl group, A.sup.2 represents —NH— or —N(L.sup.4-Y.sup.4)—, L.sup.2 and L.sup.4 represent a divalent group or a single bond, L.sup.3 represents a divalent group, and Y.sup.2 to Y.sup.4 represent a monovalent group.

##STR00001##

Provided are an ink for an impermeable base material, including an aqueous medium and resin particles, in which a resin of the resin particles has a glass transition temperature of −40° C. or higher and 85° C. or lower, the resin has at least one selected from the group consisting of a unit (1) to a unit (3), and at least one of an acid group or a salt of the acid group, an acid value of the resin is 0.10 mmol/g or greater and 2.65 mmol/g or less, and a proportion of a solvent having a boiling point of 250° C. or higher in the aqueous medium is 3% by mass or less, and an image recording method. R.sup.2 represents a hydrogen atom or a C1 to C4 alkyl group, A.sup.2 represents —NH— or —N(L.sup.4-Y.sup.4)—, L.sup.2 and L.sup.4 represent a divalent group or a single bond, L.sup.3 represents a divalent group, and Y.sup.2 to Y.sup.4 represent a monovalent group.

##STR00001##

This disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and systems for three-dimensional printing. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and a detailing agent. The fusing agent can include water and metal oxide nanoparticles dispersed therein. The metal oxide nanoparticles can be selected from titanium dioxide, zinc oxide, cerium oxide, indium tin oxide, or a combination thereof. The metal oxide nanoparticles can have an average particle size from about 2 nm to about 500 nm. The detailing agent can include a detailing compound.

This disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and systems for three-dimensional printing. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and a detailing agent. The fusing agent can include water and metal oxide nanoparticles dispersed therein. The metal oxide nanoparticles can be selected from titanium dioxide, zinc oxide, cerium oxide, indium tin oxide, or a combination thereof. The metal oxide nanoparticles can have an average particle size from about 2 nm to about 500 nm. The detailing agent can include a detailing compound.

Examples of the present disclosure are directed toward an ink composition including a surfactant. An example ink composition consistent with the present disclosure includes a dye colorant dispersion, a solvent, a chelating agent, an oleth-3-phosphate, and a surfactant including a modified fatty alcohol polyglycol ether. In various examples, the dye colorant dispersion is present in an amount ranging from about 1.0 wt % to about 7.0 wt % based on a total weight of the ink, and the solvent is present in an amount ranging from about 10 wt % to about 22 wt % based on the total weight of the ink. The chelating agent may be present in an amount ranging from about 0.05 wt % to about 0.2 wt % based on the total weight of the ink, and the oleth-3-phosphate is in an amount ranging from about 0.1 wt % to about 0.3 wt % based on the total weight of the ink.

Examples of the present disclosure are directed toward an ink composition including a surfactant. An example ink composition consistent with the present disclosure includes a dye colorant dispersion, a solvent, a chelating agent, an oleth-3-phosphate, and a surfactant including a modified fatty alcohol polyglycol ether. In various examples, the dye colorant dispersion is present in an amount ranging from about 1.0 wt % to about 7.0 wt % based on a total weight of the ink, and the solvent is present in an amount ranging from about 10 wt % to about 22 wt % based on the total weight of the ink. The chelating agent may be present in an amount ranging from about 0.05 wt % to about 0.2 wt % based on the total weight of the ink, and the oleth-3-phosphate is in an amount ranging from about 0.1 wt % to about 0.3 wt % based on the total weight of the ink.

An ink composition for forming an electron transport layer of a light-emitting device of a display device includes: an electron-transporting compound including a phosphine oxide moiety; and a solvent represented by Formula 1,

(P═O)(OR.sub.1)(OR.sub.2)(OR.sub.3)  Formula 1

wherein, in Formula 1, R.sub.1 to R.sub.3 each, independently from one another, are hydrogen, deuterium, or a C.sub.1-C.sub.30 alkyl group, and at least one of R.sub.1 to R.sub.3 is a C.sub.1-C.sub.30 alkyl group.

An ink composition for forming an electron transport layer of a light-emitting device of a display device includes: an electron-transporting compound including a phosphine oxide moiety; and a solvent represented by Formula 1,

(P═O)(OR.sub.1)(OR.sub.2)(OR.sub.3)  Formula 1

wherein, in Formula 1, R.sub.1 to R.sub.3 each, independently from one another, are hydrogen, deuterium, or a C.sub.1-C.sub.30 alkyl group, and at least one of R.sub.1 to R.sub.3 is a C.sub.1-C.sub.30 alkyl group.