The invention relates to a heat-sensitive recording material, comprising a carrier substrate and a heat-sensitive colour-forming layer, which contains at least one colour former and at least one phenol-free colour developer, characterised in that the at least one colour developer is the compound of formula (A), Ar(NH—CO—NH—CO—NH—Ar.sup.1).sub.n (A), wherein Ar is an unsubstituted or substituted phenyl or naphthyl group, Ar.sup.1 is an unsubstituted or substituted phenyl, naphthyl, pyridyl, thiazolyl or benzothiazolyl group, and n is 1 or 2.

A radiation curable gravure ink, comprising: cationic polymerizable compound comprising a hydroxyl-containing oxetane-based compound and an alicyclic epoxy-based compound; a cationic photoinitiator; a pigment; and filler.

A radiation curable gravure ink, comprising: cationic polymerizable compound comprising a hydroxyl-containing oxetane-based compound and an alicyclic epoxy-based compound; a cationic photoinitiator; a pigment; and filler.

A photocrosslinkable agent includes at least one methacrylate-modified nanoparticle that includes a plurality of molecules attached to surface of a nanoparticle. At least a portion of the molecules includes a molecule that includes a nanoparticle surface attachment ligand a terminal methacrylate ligand. At least a portion of the molecules may include a second molecule that includes a nanoparticle surface attachment ligand and a hydrophilic terminal ligand, wherein the methacrylate-modified nanoparticle has water solubility that is controlled by the relative amounts of the terminal methacrylate ligand and the hydrophilic terminal ligand. The photocrosslinkable agent may be crosslinked within a polymer network by a one-step process, with minimal disruption to the molecular network or crosslinking density and may be formulated for use as one or more of an imaging contrast agent, a therapeutic, or a reinforcement, a transducer.

A photocrosslinkable agent includes at least one methacrylate-modified nanoparticle that includes a plurality of molecules attached to surface of a nanoparticle. At least a portion of the molecules includes a molecule that includes a nanoparticle surface attachment ligand a terminal methacrylate ligand. At least a portion of the molecules may include a second molecule that includes a nanoparticle surface attachment ligand and a hydrophilic terminal ligand, wherein the methacrylate-modified nanoparticle has water solubility that is controlled by the relative amounts of the terminal methacrylate ligand and the hydrophilic terminal ligand. The photocrosslinkable agent may be crosslinked within a polymer network by a one-step process, with minimal disruption to the molecular network or crosslinking density and may be formulated for use as one or more of an imaging contrast agent, a therapeutic, or a reinforcement, a transducer.

An object is to provide a printing ink that has high environmental friendliness and is excellent in quick dry-curability of a coating when a plasma is used as a curing system. A solution is to provide an ink composition for plasma curing including a photocatalyst compound and/or a composite of a metal component and a photocatalyst compound and to provide an additive for an ink composition for plasma curing, the additive including a photocatalyst compound and/or a composite of a metal component and a photocatalyst compound.

An object is to provide a printing ink that has high environmental friendliness and is excellent in quick dry-curability of a coating when a plasma is used as a curing system. A solution is to provide an ink composition for plasma curing including a photocatalyst compound and/or a composite of a metal component and a photocatalyst compound and to provide an additive for an ink composition for plasma curing, the additive including a photocatalyst compound and/or a composite of a metal component and a photocatalyst compound.

Build materials for 3D printing applications are described herein which, in some embodiments, comprise a dye component operable to alter spectral characteristics of the printed part over the course of the build cycle. In some embodiments, for example, the dye component can provide desirable light penetration depth during article printing and sufficient optical clarity during final light curing processes.

An aqueous ink composition includes a film-forming retardation additive, which enhances the pigment efficiency in the ink composition. A method for making such an ink and a method of printing with such an ink are also disclosed.

An aqueous ink composition includes a film-forming retardation additive, which enhances the pigment efficiency in the ink composition. A method for making such an ink and a method of printing with such an ink are also disclosed.