Abstract: The present invention relates to a raw material of an organoruthenium compound for producing a ruthenium thin film or a ruthenium compound thin film by a chemical deposition method. This organoruthenium compound is an organoruthenium compound represented by the following Formula 1 and including a trimethylenemethane-based ligand (L1) and three carbonyl ligands coordinated to divalent ruthenium. In Formula 1, the trimethylenemethane-based ligand L1 is represented by the following Formula 2: wherein a substituent R of the ligand L1 is hydrogen, or any one of an alkyl group, a cyclic alkyl group, an alkenyl group, an alkynyl group, and an amino group having a predetermined number of carbon atoms.

Abstract: A polymer having a structural unit represented by the following Chemical Formula 1, where R1 represents hydrogen or a methyl group, L1 represents —COO—, —CONH—, or a single bond, X represents a hydrocarbon group having 2 to 10 carbon atoms or a hydrocarbon group having 2 to 10 carbon atoms and containing oxygen, L2 represents —O— or —NH—, Y represents a hydrocarbon group having 2 to 12 carbon atoms, and L3 represents —NH—C2H4—R2, —O-Ph-CH2CH(R2)2, or —O—Np—CH2CH(R2)2, where Ph represents a phenylene group, Np represents a naphthylene group, and R2 represents a phosphonic acid group.

Abstract: An ink contains water, a pigment, and a polymer having a structure unit represented by the following Chemical structure 1, where R1 represents an organic group having at least carbon and oxygen.

Abstract: An image forming method includes discharging ink containing water, a coloring material, a polymerization initiator, and a polymerizable compound to a recording medium by a line head to obtain an image, exposing the image to active energy radiation, applying a processing fluid to the image, and drying the image with heat, wherein the time interval between when the ink is discharged in the discharging from the line head to the recording medium passing under a bottom portion of the line head and when the recording medium is exposed to the active energy radiation in the exposing is from 0.5 to 15 seconds.

Abstract: An active energy ray polymerization initiator has a structure of Chemical Formula (1) or (2), L1 represents Chemical Formula (I), L2 represents Chemical Formula (II), one of L3 and L4 and one of L5 and L6 represent the same group as L1, the rest of L3 and L4 and one of L5 and L6 represent the same group as L2, Link 2 represents a single bond, —O—, —CO—, —SO2—, —C(CF3)2—, an aliphatic hydrocarbon group having 1 to 12 carbon atoms, or an aromatic group having 6 to 15 carbon atoms, Z represents a tertiary amine. R represents a hydrocarbon group having one to three carbon atoms or methoxy group, n represents 0 or an integer of from 1 to 3, Link 1 represents —(CH2)x—(OC2H4)y—, where x represents an integer of from 2 to 12 and y represents 0 or an integer of from 1 to 11.

Abstract: An active-energy-ray-polymerizable initiator having a structure represented by the following general formula (1) is provided. In general formula (1), L1 represents —C(?O)—O— (binding to L2 side) or —O—, L2 represents —O(CH2)p-(binding to L1 side), —(OC2H4)n-(binding to L1 side), or —(OC3H6)m-(binding to L1 side), where p represents an integer of 2 to 16, n represents an integer of 2 to 12, and m represents 2 or 3, L3 represents a direct binding or —NH—, L4 represents —OC2H4-(binding to L3 side) or —(OC2H4)2-(binding to L3 side), and R represents —H or —CH3.

Abstract: An image forming method includes discharging ink containing water, a coloring material, a polymerization initiator, and a polymerizable compound to a recording medium by a line head to obtain an image, exposing the image to active energy radiation, applying a processing fluid to the image, and drying the image with heat, wherein the time interval between when the ink is discharged in the discharging from the line head to the recording medium passing under a bottom portion of the line head and when the recording medium is exposed to the active energy radiation in the exposing is from 0.5 to 15 seconds.

Abstract: An ink contains water, a coloring material, and a polymer having a structure unit represented by the following Chemical formula 1 and a structure unit having an anionic group, where R1 represents a hydrogen atom or a methyl group, L1 is an alkylene group having three to five carbon atoms having a hydroxyl group, L2 is an alkylene group having two to ten carbon atoms, and Ar represents a phenyl group, a biphenyl group, or a naphthyl group.

Abstract: Ink includes water, a coloring material, and a copolymer including a first structure unit represented by the following Chemical formula 1 and a second structure unit including an anionic group. In the Chemical formula, R represents a hydrogen atom or a methyl group, X represents an alkylene group having 2-4 carbon atoms, and Y represents a substituted or non-substituted straight-chain alkylene group having 5 to 7 carbon atoms.

Abstract: An ink, includes water; a coloring material; and a cross-linked copolymer having a structure unit represented by the following Chemical formula 1, and a structure unit represented by the following Chemical formula 2, in Chemical formula 1, X represents a hydrogen atom or a cation and R1 represents a hydrogen atom or a methyl group, in Chemical formula 2, R2 represents a hydrogen atom or a methyl group, L represents an alkylene group having 2 to 18 carbon atoms, and * represents an atomic bond.

Abstract: An ink contains water, a coloring material, and a polymer having a structure unit represented by the following Chemical formula 1 and a structure unit having an anionic group, where R1 represents a hydrogen atom or a methyl group, L1 is an alkylene group having three to five carbon atoms having a hydroxyl group, L2 is an alkylene group having two to ten carbon atoms, and Ar represents a phenyl group, a biphenyl group, or a naphthyl group.

Abstract: An active-energy-ray-polymerizable initiator having a structure represented by the following general formula (1) is provided. In general formula (1), L1 represents —C(?O)—O— (binding to L2 side) or —O—, L2 represents —O(CH2)p-(binding to L1 side), —(OC2H4)n-(binding to L1 side), or —(OC3H6)m-(binding to L1 side), where p represents an integer of 2 to 16, n represents an integer of 2 to 12, and m represents 2 or 3, L3 represents a direct binding or —NH—, L4 represents —OC2H4-(binding to L3 side) or —(OC2H4)2-(binding to L3 side), and R represents —H or —CH3.

Abstract: An ink contains water, a pigment, and a polymer having a structure unit represented by the following Chemical structure 1, where R1 represents an organic group having at least carbon and oxygen.

Abstract: An ink includes water; a coloring material, and a polymer including a structure unit represented by the following Chemical formula 1 and a structure unit represented by the following Chemical formula 2 or the following Chemical formula 3, where R and T each, independently represent hydrogen atoms or methyl groups, L and N each, independently represent single bonds or carbonyl groups, M and Q each, independently represent naphthyl groups or biphenyl groups, p represents an integer of from 2 to 12, and q represents an integer of from 1 to 3.

Abstract: An ink comprises water, a coloring material, and a cross-linked material comprising a structure unit represented by the following Chemical formula 1 and a structure unit represented by the following Chemical formula 2, in Chemical formula 1, X represents a hydrogen atom or a cation and R1 represents a hydrogen atom or a methyl group, in Chemical formula 2, R2 represents a hydrogen atom or a methyl group, L represents an alkylene group having 2 to 18 carbon atoms, and * represents an atomic bond.

Abstract: An ink includes water; a coloring material, and a polymer including a structure unit represented by the following Chemical formula 1 and a structure unit represented by the following Chemical formula 2 or the following Chemical formula 3, where R and T each, independently represent hydrogen atoms or methyl groups, L and N each, independently represent single bonds or carbonyl groups, M and Q each, independently represent naphthyl groups or biphenyl groups, p represents an integer of from 2 to 12, and q represents an integer of from 1 to 3.

Abstract: A copolymer including a structural unit represented by General Formula (1) below, and a structural unit represented by General Formula (2) below, where, in General Formula (1), R1 is a hydrogen atom or a methyl group, L1 is an alkylene group having 2 or greater carbon atoms but 5 or less carbon atoms, and X is a hydrogen atom or a cation, where, in General Formula (2), R2 is a hydrogen atom or a methyl group and L2 is an alkylene group having 2 or greater carbon atoms but 18 or less carbon atoms.

Abstract: Ink includes water, a coloring material, and a copolymer including a first structure unit represented by the following Chemical formula 1 and a second structure unit including an anionic group. In the Chemical formula, R represents a hydrogen atom or a methyl group, X represents an alkylene group having 2-4 carbon atoms, and Y represents a substituted or non-substituted straight-chain alkylene group having 5 to 7 carbon atoms.

Abstract: An ink includes a pigment, a wax, a water soluble solvent including a solvent having an SP value of from 9.0 to 11.0, and water, wherein the mass ratio of the content of the wax in the ink to the content of the solvent having an SP value of from 9.0 to 11.0 is in a range of from 1.0:2.5 to 1.0:25.0.

Abstract: Provided is an ink containing water, a coloring material, and a copolymer, wherein the copolymer contains a structural unit represented by any one of general formulae (1a), (1b), and (1c) below and a structural unit containing an anionic group, where R1 represents a hydrogen atom or a methyl group, a represents an integer of from 6 through 10, and b represents an integer of 0 or 1, where R2 represents a hydrogen atom or a methyl group, c represents an integer of 3 or 4, and d represents an integer of 0 or 1, where R3 represents a hydrogen atom or a methyl group and e represents an integer of from 2 through 10.