Abstract: An ink composition containing at least three coloring materials of a first coloring material, a second coloring material, and a third coloring material, in which the first coloring material is a compound represented by Formula (Y), and the second coloring material is at least one compound selected from Group A consisting of compounds having a specific structure, in which the mass ratio of the content (% by mass) of the second coloring material in the composition to the content (% by mass) of the first coloring material in the composition is 0.001 to 1.0, and the third coloring material is a compound different from the first coloring material and has a specific structure. In Formula (Y), M's each independently represent a hydrogen atom or a cation, and when M represents a cation, M represents Li+ ion, Na+ ion, K+ ion or NH4+ ion.

Abstract: [Problem] To provide an aqueous ink for inkjet recording, which realizes excellent ink ejection properties, tinctorial strength, and image fastness. [Means for Resolution] An ink containing a pigment dispersion containing A and B, and an aqueous medium: A: an azo pigment represented by the following formula (1) and having at least one characteristic peak at Bragg angles (2?) of 5 to 15° and 20 to 30° in X-ray diffraction with characteristic Cu K? line; and B: a vinyl polymer containing a hydrophobic structural unit (a) and a hydrophilic structural unit (c).

Abstract: There is provided an aqueous solution containing (a) a preservative and (b) at least one azo compound represented by the following Formula (1) or a salt thereof, in which the content of (b) is 1% by mass to 25% by mass. (In Formula (1), G represents a nitrogen atom or —C(R2)?. R2 represents a hydrogen atom, a sulfo group, a carboxyl group, a substituted or unsubstituted carbamoyl group or a cyano group. X1, X2, X3, X4, X5, X6 and X7 each independently represents a hydrogen atom or a monovalent substituent. Y2, Y3 and Y4 each independently represents a hydrogen atom or a monovalent substituent. Y2, Y3 and Y4 may be bonded with each other to form a ring. All of Y2, Y3 and Y4 do not represent hydrogen atoms at the same time. M each independently represents a hydrogen atom or a monovalent countercation.

Abstract: There is provided a coloring composition containing a compound represented by Formula (1): wherein D represents a residue structure in which four hydrogen atoms are removed from the compound represented by Formula (2), R1 and R2 represent R1?R2?H or R1?R and R2=-L-CO2M, R represents a hydrogen atom or a monovalent substituent, and when a plurality of R is present, R's may be the same or different, L represents a divalent linking group, and when a plurality of L is present, L's may be the same or different, M represents a hydrogen atom or a counteraction, and when a plurality of M is present, M's may be the same or different, and n represents the number of 1 to 4, and m represents the number of 0 to 3, provided that m+n is 4.

Abstract: There is provided a coloring composition containing: a compound represented by Formula (1) or Formula (4); and a copper compound that is soluble in water: wherein, in Formula (1), D represents a residue structure in which four hydrogen atoms are removed from the compound represented by Formula (2), M represents a hydrogen atom or a counteraction, and a plurality of M may be the same or different: wherein in Formula (4), L represents a di- to tetravalent linking group, D? represents a residue structure in which any one of one to five hydrogen atom(s) is removed from the compound represented by Formula (5), m represents an integer of 1 to 10, provided that a plurality of L may be the same or different, and a plurality of D? may be the same or different.

Abstract: There is provided an aqueous solution including: (a) a preservative, and (b) at least one kind of an azo compound represented by the following Formula (1) or a salt thereof, wherein a content of (b) is 1% by mass to 25% by mass: wherein, in Formula (1), A represents a substituted phenyl group or a substituted or unsubstituted nitrogen-containing 5-membered heterocyclic group, G represents a nitrogen atom or —C(R2)?, R2 represents a hydrogen atom, a sulfo group, a carboxy group, a substituted or unsubstituted carbamoyl group or cyano group, Y2, Y3 and Y4 each independently represents a hydrogen atom or a monovalent substituent, Y2, Y3 and Y4 may be bonded to each other to form a ring, all of Y2, Y3 and Y4 do not represent a hydrogen atom at the same time, and M each independently represents a hydrogen atom or a monovalent countercation.

Abstract: The ink set includes a yellow ink composition and either a magenta ink composition or a cyan ink composition, or both, wherein a coloring agent of the yellow ink composition is one which includes an azo pigment represented e.g. by the following formula or its tautomers or their salts or hydrates, the magenta ink composition contains as a coloring agent at least one pigment selected from the following: C.I. Pigment Violet 19, C.I. Pigment Red 122, C.I. Pigment Red 202 and C.I. Pigment Red 209, and the cyan ink composition contains as a coloring agent at least one pigment selected from the following: C.I. Pigment blue 15:1, C.I. Pigment Blue 15:2, C.I. Pigment Blue 15:3, C.I. Pigment Blue 15:4 and C.I. Pigment Blue 15:6.

Abstract: There is provided a coloring composition containing at least a first coloring material and at least a second coloring material, in which the first coloring material is a compound represented by the following Formula (Y), the second coloring material is, for example, the following compound 8, and the mass ratio of the content (% by mass) of the second coloring material in the composition to the content (% by mass) of the first coloring material in the composition is 0.001 to 1.0. In Formula (Y), a plurality of M each independently represent a hydrogen atom or a cation, and when M represents a cation, M represents a Li+ ion, a Na+ ion, a K+ ion or a NH4+ ion.

Abstract: An ink composition having a suitably-adjusted hue and causing no decomposition of dyes during storage is provided. The ink composition contains a compound (a) represented by the following formula (1), an ingredient (c) and moisture-retentive agents, characterized by being from 0.1 mass % to lower than 7.0 mass % in content of the compound represented by the formula (1), 10.0 mass % or lower in content of a moisture-retentive agent having 3 or more hydroxyl groups (b) and lower than 30.0 in molar ratio of the moisture-retentive agent having 3 or more hydroxyl groups to the compound represented by the formula (1): wherein each of Ar1 and Ar2 preferably represents an aromatic heterocyclic group, each of A1 and A2 represents a hydrogen atom or a substituent, Y represents —OM or —NR1R2, M represents a hydrogen atom or a metal ion and each of R1 and R2 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group or the like. The ingredient (c) is at least one compound selected from C.I.

Abstract: An ink composition is provided which does not undergo decomposition or fading of colorants even when stored under high-temperature environment. An ink composition which contains a compound represented by the following general formula (1) and a humectant, wherein the content of the compound represented by the general formula (1) is from 0.1% by mass to less than 7.0% by mass, the content of the humectant having 3 or more hydroxyl groups is 8.0% by mass or less, and the molar ratio of the humectant having 3 or more hydroxyl groups/the compound represented by the general formula (1) being less than 15.

Abstract: An ink set is provided, the ink set including a yellow ink composition; and at least one of a magenta ink composition and a cyan ink composition, wherein a colorant of the yellow ink composition contains an azo pigment represented by formula (1), its tautomer, or a salt or hydrate thereof, the magenta ink composition contains at least one pigment selected from quinacridone pigments, and the cyan ink composition contains at least one pigment selected from phthalocyanine pigments: wherein Z represents atoms necessary to complete a 5- to 8-membered nitrogen-containing heterocycle; Y1, Y2, R11 and R12 each represents a hydrogen or a substituent; G1 and G2 each represents a hydrogen, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; and W1 and W2 each represents an alkoxy group, an amino group, an alkyl group or an aryl group.

Abstract: The invention provides a pigment dispersion composition including an azo pigment represented by formula (1), in which the azo pigment represented by formula (1) does not have an ionic hydrophilic group, an azo pigment derivative and a dispersant. In formula (1), G represents a hydrogen atom, an aliphatic group, an aryl group or a heterocyclic group; R1 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group or a heterocyclic group; R2 represents a substituent; A represents a heterocyclic group; m represents an integer of 0 to 5; and n represents an integer of 1 to 4, wherein: when n=2, the azo pigment is a dimer formed via R1, R2, A or G; when n=3, the azo pigment is a a trimer formed via R1, R2, A or G; and when n=4, the azo pigment is a tetramer formed via R1, R2, A or G.

Abstract: To provide a process for producing an azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and showing excellent fastness such as light fastness and ozone fastness, an azo pigment dispersion, a coloring composition, and an ink for inkjet recording.

Abstract: An aqueous ink for inkjet recording is provided. The aqueous ink ensures that the ejection accuracy in inkjet recording is excellent and helps suppress generation of density unevenness and streak unevenness, even after storage for a long period of time or exposure to high temperatures. The aqueous ink for inkjet recording contains vinyl polymer particles containing components A and B and a water-soluble solvent. Component A is an azo pigment having a specific structure, its tautomer, or a salt or hydrate thereof; and Component B is a vinyl polymer containing (a) a hydrophobic structural unit having an aromatic ring bonded to the polymer main chain through a linking group and (b) a hydrophilic structural unit.

Abstract: [Problem] To provide a coloring matter which has a good hue, and is capable of forming an image high in fastness property under various use conditions and environmental conditions, and particularly suitable for an ink. [Solving Means] A coloring matter represented by the following formula (I): wherein in the formula, G represents a heterocyclic group, and n represents an integer of 1 to 3; when n is 1, R, X, Y, Z, Q, and G each represents a monovalent group; when n is 2, R, X, Y, Z, Q, and G each represents a monovalent or divalent substituent, provided that at least one represents a divalent substituent; and when n is 3, R, X, Y, Z, Q, and G each represents a monovalent, divalent or trivalent substituent, provided that at least two each represents a divalent substituent, or at least one represents a trivalent substituent.

Abstract: An ink set including at least a yellow ink composition, a magenta ink composition and a cyan ink composition, wherein the yellow ink composition contains, as the yellow colorant, at least one member selected from the group consisting of a compound represented by a specific structure and a salt thereof, each of the yellow colorant, the magenta colorant and the cyan colorant contained in the yellow ink composition, the magenta ink composition and the cyan ink composition, respectively, has at least one ionic hydrophilic group, the counter ion of the ionic hydrophilic group contains a lithium ion, and the lithium ion concentration is 70 mol % or more based on all cations in each ink composition.

Abstract: A method of producing a metal phthalocyanine compound, which contains: conducting a reaction between at least two compounds selected from among Compounds A to F of formula (I), and a metal compound, in a buffer solution of an organic base or an inorganic base and an acid, in the presence of a dehydrating agent: wherein R is a hydrogen atom or a substituent; 1 is an integer of 0 to 4; a plurality of Rs may be the same or different from each other when 1 is 2 to 4; and G is a group of atoms necessary for forming at least one of a 5- or 6-membered aromatic ring and a 5- or 6-membered hetero ring.

Abstract: A pigment composition containing an azo pigment represented by the following general formula (1) and a pigment derivative having a hydrophilic group: wherein G represents a hydrogen atom, an aliphatic group, an aryl group, a heterocyclic group, an acyl group, an aliphatic oxycarbonyl group, a carbamoyl group, an aliphatic sulfonyl group, or an arylsulfonyl group, R1 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group, R2 represents a substituent, A represents an aromatic 5- or 6-membered heterocyclic group, m represents an integer of from 0 to 5, and n represents an integer of from 1 to 4, with the general formula (1) not containing any ionic hydrophilic group.

Abstract: To provide a process for producing an azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and showing excellent fastness such as light fastness and ozone fastness, an azo pigment dispersion, a coloring composition, and an ink for inkjet recording. A process for producing, for example, an azo pigment represented by the general formula (9), which includes a step of preparing a solution containing a compound represented by the following general formula (7) and an acid, and a step of bringing the solution incontact with a diazonium salt (8) derived from a heterocyclic amine.

Abstract: An aqueous ink composition for inkjet recording, including: a coloring material containing at least one selected from the group consisting of azo pigments represented by the following formula (1) and tautomers thereof, and salts and hydrates thereof; a dispersant; and a urethane-modified polyester resin wherein Z represents a divalent group derived from a 5- to 8-membered nitrogen-containing heterocycle; Y1, Y2, R11 and R12 each independently represent a hydrogen atom or a substituent; G1 and G2 each independently represent a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; and W1 and W2 each independently represent an alkoxy group, an amino group, an alkyl group or an aryl group.