In one aspect, inks for use with a three-dimensional (3D) printing system are described herein. In some embodiments, an ink described herein comprises up to 80 wt. % oligomeric curable material; up to 80 wt. % monomeric curable material; up to 10 wt. % photoinitiator; up to 1 wt. % non-curable absorber material; and up to 10 wt. % one or more additional components, based on the total weight of the ink, and wherein the total amount of the foregoing components is equal to 100 wt. %. Additionally, the photoinitiator is operable to initiate curing of the oligomeric curable material and/or the monomeric curable material when the photoinitiator is exposed to incident curing radiation having a peak wavelength λ. Moreover, the ink has a penetration depth (D.sub.p), a critical energy (E.sub.c), and a print through depth (D.sub.PT) at the wavelength λ of less than or equal to 2×D.sub.p.

In one aspect, inks for use with a three-dimensional (3D) printing system are described herein. In some embodiments, an ink described herein comprises up to 80 wt. % oligomeric curable material; up to 80 wt. % monomeric curable material; up to 10 wt. % photoinitiator; up to 1 wt. % non-curable absorber material; and up to 10 wt. % one or more additional components, based on the total weight of the ink, and wherein the total amount of the foregoing components is equal to 100 wt. %. Additionally, the photoinitiator is operable to initiate curing of the oligomeric curable material and/or the monomeric curable material when the photoinitiator is exposed to incident curing radiation having a peak wavelength λ. Moreover, the ink has a penetration depth (D.sub.p), a critical energy (E.sub.c), and a print through depth (D.sub.PT) at the wavelength λ of less than or equal to 2×D.sub.p.

An ink set of the present disclosure includes a colored ink jet ink and a decoloring ink. The colored ink jet ink includes a leuco dye, a developer, and a dispersant, and the decoloring ink includes a solvent and water. The solvent includes a specific solvent component that has a Hansen solubility parameter that differs from the Hansen solubility parameter of the developer by an absolute value of less than or equal to 5.3. Preferably, the specific solvent component is a glycol ether or a glycol. Preferably, the leuco dye is a fluoran. Preferably, the developer is a compound containing a phenolic hydroxy group in the molecule.

An ink set of the present disclosure includes a colored ink jet ink and a decoloring ink. The colored ink jet ink includes a leuco dye, a developer, and a dispersant, and the decoloring ink includes a solvent and water. The solvent includes a specific solvent component that has a Hansen solubility parameter that differs from the Hansen solubility parameter of the developer by an absolute value of less than or equal to 5.3. Preferably, the specific solvent component is a glycol ether or a glycol. Preferably, the leuco dye is a fluoran. Preferably, the developer is a compound containing a phenolic hydroxy group in the molecule.

A sprayable and hygroscopic ink for a digital printing process on a fabric includes 3.0 parts by weight to 6.0 parts by weight of a colorant, 0.5 parts by weight to 2.0 parts by weight of a hygroscopic agent, 0.5 parts by weight to 1.0 part by weight of a surfactant, and a balance of a solvent, in which a pH value of the hygroscopic agent is between 6.0 and 8.5 at 25° C., and a particle diameter D90 of the sprayable and hygroscopic ink is between 180 nm and 220 nm.

An ink jet printing ink includes a colorant selected from acid dyes and reactive dyes, an organic solvent, and water. The organic solvent has a solubility parameter value greater than or equal to 11 and less than or equal to 13.5. The organic solvent also has a viscosity, at 20° C., greater than or equal to 10 mPa.Math.s and less than or equal to 180 mPa.Math.s.

An ink jet printing ink includes a colorant selected from acid dyes and reactive dyes, an organic solvent, and water. The organic solvent has a solubility parameter value greater than or equal to 11 and less than or equal to 13.5. The organic solvent also has a viscosity, at 20° C., greater than or equal to 10 mPa.Math.s and less than or equal to 180 mPa.Math.s.

A dispersion contains water, a color material, and a dispersing resin that disperses the color material, the dispersing resin having a structural unit A containing a hydrophobic monomer, a structural unit B containing a hydrophilic acrylic acid monomer, and a structural unit C containing a sulfonic acid group-containing acrylamide monomer, where the dispersing resin has a weight average molecular weight of from 5000 to 100000 and a content of the structural unit A is 60 mol % or more with respect to a total amount of the dispersing resin.

A dispersion contains water, a color material, and a dispersing resin that disperses the color material, the dispersing resin having a structural unit A containing a hydrophobic monomer, a structural unit B containing a hydrophilic acrylic acid monomer, and a structural unit C containing a sulfonic acid group-containing acrylamide monomer, where the dispersing resin has a weight average molecular weight of from 5000 to 100000 and a content of the structural unit A is 60 mol % or more with respect to a total amount of the dispersing resin.

The pretreatment liquid of the present invention is applicable for a fabric to be used for inkjet textile printing, and the pretreatment liquid contains a block copolymer including a hydrophobic block derived from a hydrophobic resin having an SP value of less than 11 and a hydrophilic block derived from a hydrophilic resin having an SP value of 11 or more, with the difference between the SP values of the hydrophobic resin and the hydrophilic resin of 1.0 or more; and water.