An object is to provide an ink-jet ink satisfying rapid-drying properties, long decap time, and intermittent long-run printability. The object can be achieved by an ink-jet ink comprising an organic solvent, a surfactant, and a coloring material, wherein the organic solvent contains 1,3-dioxolane.

An object is to provide an ink-jet ink satisfying rapid-drying properties, long decap time, and intermittent long-run printability. The object can be achieved by an ink-jet ink comprising an organic solvent, a surfactant, and a coloring material, wherein the organic solvent contains 1,3-dioxolane.

An ink composition according to an embodiment of the present invention, comprising: a volatile solvent; and dispersed in the volatile solvent, a plurality of semiconductor nanoparticles each coordinated to a plurality of organic ligands, wherein a ratio by mass of the semiconductor nanoparticles to the volatile solvent is greater than 1:1. A product according to an embodiment of the present invention comprising: a solid substrate; and arranged on the solid substrate, a dried residue of an ink composition, the dried residue comprising a plurality of semiconductor nanoparticles arranged without an intervening polymer matrix, wherein the a plurality of semiconductor nanoparticles each coordinated to a plurality of organic ligands.

The infrared-absorbing UV ink according to the present invention contains a tungsten-based infrared-absorbing pigment, a solvent, an acrylic resin that is soluble to the solvent, a UV-curable acrylic monomer, and a photocuring agent.

Provided are an ink jet recording ink including an organic solvent which is at least one selected from the group consisting of a compound represented by Formula 1 and a compound represented by Formula 2 and has a Clog P value of 1.0 to 3.5, resin particles which contain a resin having 1% by mass to 20% by mass of a structural unit represented by Formula 3 with respect to a total mass of the resin, a silicone-based surfactant, and water, and an image recording method. The description in Formula 1, Formula 2, and Formula 3 has been made in the specification.

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Provided are an ink jet recording ink including an organic solvent which is at least one selected from the group consisting of a compound represented by Formula 1 and a compound represented by Formula 2 and has a Clog P value of 1.0 to 3.5, resin particles which contain a resin having 1% by mass to 20% by mass of a structural unit represented by Formula 3 with respect to a total mass of the resin, a silicone-based surfactant, and water, and an image recording method. The description in Formula 1, Formula 2, and Formula 3 has been made in the specification.

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An ink jet ink composition which is a water-based ink, includes: a colorant; a resin; a water-soluble low molecular weight organic compound A which is one of an amide, a sulfur-containing compound, and a cyclic ether and which satisfies the following condition (a) and condition (b); and a silicone-based surfactant which satisfies the following condition (c). The condition (a) is that a surface tension of an aqueous solution at a concentration of 10 percent by mass is 42 to 56 mN/m, the condition (b) is that a standard boiling point is 150° C. to 300° C., and the condition (c) is that a solubility in water at 20° C. is 1 percent by mass or less.

An ink jet ink composition which is a water-based ink, includes: a colorant; a resin; a water-soluble low molecular weight organic compound A which is one of an amide, a sulfur-containing compound, and a cyclic ether and which satisfies the following condition (a) and condition (b); and a silicone-based surfactant which satisfies the following condition (c). The condition (a) is that a surface tension of an aqueous solution at a concentration of 10 percent by mass is 42 to 56 mN/m, the condition (b) is that a standard boiling point is 150° C. to 300° C., and the condition (c) is that a solubility in water at 20° C. is 1 percent by mass or less.

Electrically conductive ink compositions are provided that comprise at carbon nanomaterials of one-dimensional, two-dimensional, and quasi-three-dimensional nanostructures and/or their combinations, and/or doping with elements such as nitrogen, boron, sulfur, in certain ratios. The carbon nanomaterials are selected from the group consisting of graphene and graphene oxide particles, carbon nanotubes, and graphene aerosol gels.

Electrically conductive ink compositions are provided that comprise at carbon nanomaterials of one-dimensional, two-dimensional, and quasi-three-dimensional nanostructures and/or their combinations, and/or doping with elements such as nitrogen, boron, sulfur, in certain ratios. The carbon nanomaterials are selected from the group consisting of graphene and graphene oxide particles, carbon nanotubes, and graphene aerosol gels.