Abstract: A three-dimensional printing kit can include a binding agent and a particulate build material. The binding agent can include a binder in an aqueous liquid vehicle. The aqueous liquid vehicle can include an organic co-solvent with a boiling point from about 150° C. to about 300° C. The particulate build material can include from about 80 wt % to 100 wt % stainless steel particles that can have an average particle size from about 3 ?m to about 200 ?m. About 0.02 wt % to about 0.3 wt % of a total weight of the stainless steel particles can be an oxidation barrier formed on surfaces of the stainless steel particles.

Abstract: A three-dimensional printing kit can include a wetting agent, a binding agent, and a particulate build material. The wetting agent an include water, from about 5 wt % to about 60 wt % organic co-solvent, and from about 0.1 wt % to about 10 wt% surfactant. The binding agent can include from about 2 wt % to about 25 wt % polymer binder and a liquid vehicle. The particulate build material can include from about 80 wt % to 100 wt % metal particles that can have a D50 particle size ranging from about 2 gm to about 150 ?m.

Abstract: The present disclosure describes binder agents for printing three-dimensional green body objects, which can include water, an organic co-solvent, a nonionic surfactant, a dihydrazide compound, and latex particles. The nonionic surfactant can include two hydrophilic head groups and two hydrophobic tail groups per molecule.

Abstract: The present disclosure relates to a binding agent for printing a 3D green body object. The binding agent includes from about 0.3 wt % to about 3 wt % multi-functional carboxylic acid having a weight average molecular weight range from about 100 MW to about 1,000 MW, from about 2 wt % to about 20 wt % a (meth)acrylic latex binder, from about 10 wt % to about 40 wt % solvent package including from about 3 wt % to about 40 wt % of a coalescing solvent, and from about 40 wt % to about 88 wt % water. The weight percentage ranges are based on total content of the binding agent.

Abstract: The present disclosure relates to a binding agent for printing a 3D green body object. The binding agent includes from about 0.3 wt % to about 3 wt % adhesion promoter including an aromatic maleic anhydride-containing copolymer, from about 2 wt % to about 20 wt % a (meth)acrylic latex binder, from about 10 wt % to about 40 wt % solvent package including from about 3 wt % to about 40 wt % of a coalescing solvent, and from about 40 wt % to about 88 wt % water. The weight percentage ranges are based on total content of the binding agent.

Abstract: An ink composition can include carbon black pigment, from 50 wt % to 80 wt % water, from 15 wt % to 35 wt % organic solvent, from 0.25 wt % to 9 wt % free latex particles having an average particles size from 50 nm to 500 nm, from 0.1 wt % to 1 wt % C10 to C20 fatty acid, and lithium.

Abstract: Described herein are compositions, kits, methods, and systems for printing metal three-dimensional objects. In an example, described is a binding fluid composition for three-dimensional printing, the composition comprising: an aqueous liquid vehicle comprising at least one diol; and latex polymer particles dispersed in the aqueous liquid vehicle.

Abstract: The present disclosure is drawn to an inkjet printing system including an ink composition and a microfluidic ejection assembly. The ink composition can include carbon black pigment, from 50 wt % to 80 wt % water, from 10 wt % to 40 wt % of an organic solvent system, and from 0.5 wt % to 6 wt % polyurethane. The microfluidic ejection assembly can include a drop generator for externally ejecting the ink composition, and a fluid pump for internally inducing microfluidic recirculation flow of the ink composition into the drop generator.

Abstract: The present disclosure is drawn to an inkjet printing system including an ink composition and a microfluidic ejection assembly. The ink composition can include carbon black pigment, from 50 wt % to 80 wt % water, from 10 wt % to 40 wt % of an organic solvent system, and from 0.5 wt % to 6 wt % polyurethane. The microfluidic ejection assembly can include a drop generator for externally ejecting the ink composition, and a fluid pump for internally inducing microfluidic recirculation flow of the ink composition into the drop generator.

Abstract: An ink composition can include carbon black pigment, from 50 wt % to 80 wt % water, from 15 wt % to 35 wt % organic solvent, from 0.25 wt % to 9 wt % free latex particles having an average particles size from 50 nm to 500 nm, from 0.1 wt % to 1 wt % C10 to C20 fatty acid, and lithium.

Abstract: An example inkjet ink composition includes a colorant, an organic solvent package, at least 50 wt % water with respect to the weight of the inkjet ink composition, and from about 0.25 wt % to about 2 wt %, with respect to the weight of the inkjet ink composition, of a polyurethane binder. The organic solvent package includes from about 1 wt % to about 12 wt %, with respect to the weight of the inkjet ink composition, of a first solvent having 1 or 2 free hydroxyl groups and 0 to 3 glycol units and from about 0.5 wt % to about 25 wt %, with respect to the weight of the inkjet ink composition, of a second solvent selected from the group consisting of 1-(2-hydroxyethyl)-2-pyrrolidinone, 2-pyrrolidone, glycerol, and combinations thereof.

Abstract: An example inkjet ink composition includes a colorant, an acid, lithium, an organic solvent package, at least 50 wt % water with respect to the weight of the inkjet ink composition, and from about 0.25 wt % to about 2 wt %, with respect to the weight of the inkjet ink composition, of a polyurethane binder. The acid is selected from the group consisting of oleic acid, linoleic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, and combinations thereof. The organic solvent package includes from about 1 wt % to about 12 wt %, with respect to the weight of the inkjet ink composition, of a first solvent having 1 or 2 free hydroxyl groups and 0 to 3 glycol units and from about 0.5 wt % to about 25 wt %, with respect to the weight of the inkjet ink composition, of a second solvent selected from the group consisting of 1-(2-hydroxyethyl)-2-pyrrolidinone, 2-pyrrolidone, glycerol, and combinations thereof.

Abstract: The present disclosure is drawn to an inkjet ink composition. The inkjet ink composition can include carbon black pigment, polyurethane, at least 50 wt % water, and from 1 wt % to 12 wt % of a solvent having 1 or 2 free hydroxyl groups and 0 to 3 glycol units.

Abstract: The present disclosure is drawn to an ink composition. The ink composition can include carbon black pigment, polyurethane, at least 50 wt % water, and from 1 wt % to 6 wt % of diol solvent, triol solvent, or a mixture thereof. When the solvent is a diol solvent the ink composition can be devoid of 2-pyrrolidone.

Abstract: An ink composition includes water, a co-solvent, a colorant, and a modified polymer or copolymer additive. The modified polymer or copolymer additive is selected from the group consisting of i) a hydrolyzed poly(isobutylene-alt-maleic anhydride), ii) a hydrolyzed poly(maleic anhydride-alt-1-octadecene), and iii) a modified polymer or copolymer. The modified polymer or copolymer includes a repeating unit of a backbone chain, and a long chain pendant group attached to a carbon atom of the repeating unit. In the backbone chain, the long chain pendant group of the repeating unit is separated by fewer than 8 spacer carbon atoms from another long chain pendant group of an adjacent repeating unit.

Abstract: An ink composition includes water, a co-solvent, a colorant, and a modified polymer or copolymer additive. The modified polymer or copolymer additive is selected from the group consisting of i) a hydrolyzed poly(isobutylene-alt-maleic anhydride), ii) a hydrolyzed poly(maleic anhydride-alt-1-octadecene), and iii) a modified polymer or copolymer. The modified polymer or copolymer includes a repeating unit of a backbone chain, and a long chain pendant group attached to a carbon atom of the repeating unit. In the backbone chain, the long chain pendant group of the repeating unit is separated by fewer than 8 spacer carbon atoms from another long chain pendant group of an adjacent repeating unit.