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: Formula (1) DSO3M)4 or Formula (4) (L)m-(D?)n wherein D, M, L, D?, m and n are defined in the claims and in the specification.

Abstract: An ink set for inkjet recording, which has excellent water resistance and light resistance in the hue range of yellow-orange-magenta. The ink set includes two-color ink compositions, i.e., a) a magenta ink composition and b) an yellow ink composition, each of which includes a dye, water and a water-soluble organic solvent, wherein the magenta ink composition a) contains a compound produced by sulfonating a compound represented by the formula (1), a salt of the compound, or a mixture thereof as a coloring agent.

Abstract: There is provided a water-based ink set for ink-jet recording, including: a water-based yellow ink which contains water, a water-soluble organic solvent and a yellow colorant containing a yellow dye (Y-1) and a yellow dye (Y-2) indicated below; a water-based magenta ink which contains water, a water-soluble organic solvent and a magenta colorant containing a magenta dye (M-1) and a magenta dye (M-2) indicated below; a water-based cyan ink which contains water, a water-soluble organic solvent and a cyan colorant containing a cyan dye (C-1) indicated below; and a water-based black ink which contains water, a water-soluble organic solvent and a black colorant containing carbon black.

Abstract: The invention relates generally to optical data storage media, and more specifically, to holographic storage media. In one embodiment, an optical storage medium composition includes a polymer matrix. Disposed within the polymer matrix is a reactant capable of undergoing a modification that alters the refractive index of the composition upon receiving an energy transfer from an excited sensitizer. A non-linear sensitizer is also disposed within the polymer matrix, and the sensitizer includes a metal-substituted subphthalocyanine (M-sub-PC) reverse saturable absorber configured to become excited upon exposure to light beyond an intensity threshold at approximately 405 nm and configured to transfer energy to the reactant.

Abstract: The present disclosure relates generally to optical data storage media, and more specifically, to holographic storage media. In one embodiment, an optical storage medium includes a polymer matrix having one or more polymer chains. The optical storage medium also includes a reverse saturable absorption (RSA) sensitizer disposed within the polymer matrix that is configured to become excited upon exposure to light having an intensity above an intensity threshold and configured to transfer energy to a reactant. The optical storage medium also includes a diphenyl cyclopropene (DPCP)-derivative reactant disposed within the polymer matrix and capable of undergoing a modification upon receiving an energy transfer from the excited sensitizer that changes a refractive index of the optical medium.

Abstract: The present invention relates to compounds shown in the general formula (I) or (III), the salts thereof or their mixtures, as well as their preparation method and application. In the general formula (I), X1 is H or CO2H; X2 is OH or phenyl group with 0-2 sulfonic acid substituents, and the sulfonic acid substituents are located at random positions of a benzene ring; when X2 is OH, X1 is H; when X2 is phenyl group with 0-2 sulfonic acid substituents, X1 is H or CO2H; n is an integer of 0-2; and in the general formula (III), n and m are respectively an integer of 0-2. The compounds and the mixtures not only have improved light resistance, ozone resistance and water resistance, but also have excellent water solubility and long-term stability in ink-jet ink.

Abstract: The invention provides an ink containing a coloring material and a water-soluble organic solvent, wherein the coloring material is a compound represented by the following general formula (1), and the water-soluble organic solvent includes an alkanediol having 4 to 6 carbon atoms: wherein rings A, B, C and D each indicated by a broken line are, independently of one another, a benzene ring or a nitrogen-containing heteroaromatic ring, the number of the nitrogen-containing heteroaromatic ring is more than 0.0 and 3.0 or less, the remainder is the benzene ring, R1 is an alkyl group, R2 is an alkylene group, X is an anilino group having one or more sulfonic groups, m is more than 0.0 and less than 3.9, n is 0.1 or more and less than 4.0, and the sum of m and n is 1.0 or more and less than 4.0.

Abstract: A process for preparing colorants of the general formula (Ia), (Ib) or (Ic) or mixtures thereof, comprises reacting (a) tetracarboxylic acids or their functional derivatives with (b) at least one compound selected from i. aliphatic amines, ii. aromatic amines, iii. aliphatic diamines, iv. aromatic diamines, (c) optionally in the presence of further additives, (d) optionally in the presence of wetting agents in a mixing apparatus. These colorants are useful for coloration of macromolecular organic and inorganic materials of natural and synthetic origin.

Abstract: The present invention relates to a porphyrazine coloring matter or a salt thereof represented by the following formula (1) [wherein, the rings of A to D are each independently a benzene ring or a 6-membered nitrogen-containing heteroaromatic ring, E is alkylene, X is a sulfo-substituted anilino group or the like which may further have a substituent, R1 is a C1-C6 alkyl group, b is 0.00 or more and less than 3.90 as an average value, c is 0.10 or more and less than 4.00 as an average value, and the sum of b and c is 1.00 or more and less than 4.00 as an average value]. The ink composition containing the porphyrazine coloring matter of the present invention has a good hue as a cyan ink, is excellent in various fastness properties, particularly in ozone fastness, allows a high print density, has properties hardly causing bronze phenomenon, and can provide a porphyrazine coloring matter suitable for inkjet recording and an ink composition containing this.

Abstract: The present invention relates to a porphyrazine coloring matter or a salt thereof represented by the following formula (1): [wherein, the rings A to D are independently a benzene ring or a nitrogen-containing heteroaromatic ring, the number of the nitrogen-containing heteroaromatic ring is more than 0.00 and less than 1.00 as an average value, the rest are benzene rings, E is alkylene, X and Y are a sulfo-substituted anilino group and the like, b is 0.00 or more and less than 3.90 as an average value, c is 0.10 or more and less than 4.00 as an average value, and the sum of b and c is more than 3.00 and less than 4.00 as an average value].

Abstract: A mixture of azaphthalocyanine compounds of Formula (1) and salts thereof: wherein: M is 2H, Cu or Ni; each P is independently CH or N; R1 is H or optionally substituted C1-4alkyl; R2 is H or optionally substituted C1-8alkyl; R3 is H or optionally substituted hydrocarbyl; and R4 is optionally substituted hydrocarbyl; or R3 and R4 together with the nitrogen atom to which they are attached represent an optionally substituted heterocyclic ring system; x is greater than 0 and less than 4; y is greater than 0 and less than 4; z is greater than 0 and less than 4; the sum of x+y+z is in the range of from 1 to 4 and provided that at least one P is N and that no more than two P groups in any one of the four component rings of the azaphthalocyanine nucleus are N. Also compositions, inks, printing processes, printed materials and ink-jet cartridges.

Abstract: An ink composition contains a particular anthrapyridone dye and a particular copper phthalocyanine dye. The hue angle in the L*a*b* color system calculated from spectral characteristics of a 1,000-fold diluted solution of the ink composition in water is 270° to 360°. The content of the anthrapyridone dye is higher than the content of the copper phthalocyanine dye.

Abstract: An ink composition contains a water-soluble copper compound and an anthrapyridone dye represented by the following formula: wherein M1 represents a hydrogen atom, NH4, or Na; R1 represents a hydrogen atom, a substitutable alkyl group, a substitutable aryl group, or a substitutable benzoyl group; R2 represents a hydrogen atom or a substitutable alkyl group; R3 represents a hydrogen atom, a halogen atom, or a substitutable alkyl group; R4 represents a hydrogen atom, NH4 which may be substituted, or a substitutable sulfo group; and R5 represents an acyl group or a group represented by the following formula: where X and Y independently represent a chlorine atom, hydroxy group, amino group, monoethanolamino group, diethanolamino group, morpholino group, anilino group, or phenol group in which hydrogen atoms may be substituted by one or more substituents.

Abstract: A water-based ink set for ink-jet recording includes two or more kinds of water-based inks; wherein at least one water-based ink among the two or more kinds of water-based inks contains a dye represented by a general formula (1) and at least one water-based inks contains 0.5% by weight to 4% by weight a cationic polymer; and in the general formula (1): n1 is 1 or 2, each of three Ms is sodium or ammonium and the three Ms may be same or different from one another, and R0 represents a monoalkylamino group substituted by a carboxyl group and having a number of carbon atoms of 1 to 8.

Abstract: The present invention is directed to magenta inks and ink sets for ink-jet printing. The inks and ink sets provide exceptional ozone fastness, particularly when printed on porous media or plain paper. The inks of the ink sets are formulated to be compatible with each other and are capable of producing high quality printed images.

Abstract: A water-based ink set includes a yellow ink, a magenta ink, and a cyan ink, each including a coloring agent, water, and a water-soluble organic solvent. The yellow ink includes dyes (Y-1) and (Y-2), the magenta ink includes dyes (M-1) and (M-2), and the cyan ink includes a dye (C-1). Dye (Y-1): a dye represented by the formula (Y-1) Dye (Y-2): at least one dye selected from the group consisting of C. I. Direct Yellow 86, C. I. Direct Yellow 132, and C. I. Direct Yellow 142 Dye (M-1): a dye represented by the formula (M-1) Dye (M-2): at least one dye selected from the group consisting of dyes represented by a formula (M-2a), dyes represented by the formula (M-2b), C. I. Acid Red 1, and C. I. Acid Red 254 Dye (C-1): a dye represented by the formula (C-1).

Abstract: A water-based ink for ink-jet recording includes a coloring agent, water, and a water-soluble organic solvent. The coloring agent includes the following a dye (1) and a dye (2). dye (1): a dye represented by the general formula (1) dye (2): at least one dye selected from the group consisting of dyes represented by the general formula (2a), dyes represented by the general formula (2b), C. I. Acid Red 1, and C. I. Acid Red 254.

Abstract: A process for preparing azaphthalocyanine or metallo-azaphthalocyanine dyes and salts thereof. Also novel compounds, inks, printing processes, printed materials and ink jet cartridges.

Abstract: A water-based ink for ink-jet recording includes a coloring agent, water, and a water-soluble organic solvent. The coloring agent includes the following a dye (1) and a dye (2). dye (1): a dye represented by the general formula (1) dye (2): at least one dye selected from the group consisting of dyes represented by the general formula (2a), dyes represented by the general formula (2b), C. I. Direct Blue 199, and C. I.

Abstract: Coloring matters represented by general formula (1) or salts thereof are simply provided at a low cost as water-soluble coloring matters which exhibit absorption in the near-infrared region. Further, aqueous ink compositions which contain the coloring matters and have excellent storage stability are also provided. In general formula (1), Nc is optionally substituted naphthalocyanine; M is a metal oxide or the like; R1 and R2 are each independently hydrogen or the like; A is a crosslinking group; X and Y are each independently substituted arylamino or the like; k is more than 0 but up to 12 (on average); p is 0 to less than 12; the sum of k and p is more than 0 but up to 12; and any two or the three of R1, R2 and A may be united to form a ring.

Abstract: The present invention relates to a porphyrazine coloring matter represented by the following formula (1) or a salt thereof (wherein, the rings A to D are each independently a benzene ring or a 6-membered ring nitrogen-containing heteroaromatic ring, the number of said heteroaromatic rings is more than 0 and less than 1, E is alkylene, X is an anilino group or the like having at least one sulfo group or the like as a substituent, Y is a substituted monoalkylamino group or the like, b is 0 to 3, c is 0.1 to 3, and the sum of b and c is more than 3 and less than 4). By the present invention, a copper porphyrazine coloring matter suitable for inkjet recording which has a good hue as an cyan ink, is excellent in light fastness, ozone fastness and moisture fastness and does not cause bronze phenomenon can be provided.

Abstract: A process for preparing azaphthalocyanine or metallo-azaphthalocyanine dyes and salts thereof. Also novel compounds, inks, printing processes, printed materials (including color filters) and ink-jet cartridges.

Abstract: A process for preparing azaphthalocyanine or metallo-azaphthalocyanine dyes and salts thereof. Also novel compounds, inks, printing processes, printed materials (including color filters) and ink-jet cartridges.

Abstract: The invention relates to a compound for manufacturing watermark in a textile sheet material and the corresponding composition, material, method and use. The compound for manufacturing a watermark in a textile sheet material of formula wherein X is hexamethylene, trimethylhexamethylene, isophorone, dicyclohexylmethyl, tetramethylxylylene, tetramethylenexylene, xylylene, trimethylhexamethylene, hydrogenated 4,4?-diphenylmethylene, 1,12-dodecylene, 1,5-2-methylpentylene; 1,4-butylene; 1,4-cyclohexylene, or a compound of formula 5 R1 is a linear aliphatic C1-C12 alkyl radical or a branched aliphatic C3-C18 alkyl radical R2 is a radical of formula wherein R4 is methoxy or ethoxy R5 and R6 are H, methoxy, ethoxy, methyl or ethyl R7 is cyclohexyl, phenyl or aliphatic C3-C6 alkyl R3 is a linear aliphatic C1-C12 alkyl radical or a branched aliphatic C3-C18 alkyl radical n is 0 or 1.

Abstract: A salt of a sulfonated dye modulates a stability of the dye, particularly its ozonefastness. The salt comprises an organic cation selected from the group consisting of: a first organic cation having a positive charge delocalized between a nitrogen atom and at least one other heteroatom; a second organic cation having a positive charge delocalized between a nitrogen atom and at least two other atoms; and a third organic cation of formula (A): wherein: Rp, Rq and Rr are each independently selected from a C1-6 alkyl group; s is 0, 1, 2 or 3; and Ar is a C6-12 aryl group or C3-12 heteroaryl group.

Abstract: The present invention provides: a pigment dispersion composition including (A) an organic pigment, (B) a pigment derivative represented by Formula (I) below and (C) a polymer compound having a pigment-adsorptive functional group; a curable color composition including the pigment dispersion composition, a polymerizable compound and a polymerization initiator; and a color filter having a color region formed using the curable color composition and a method for producing the same. Q represents an organic colorant residue; A represents an ethylene group or the like; and R represents a hydroxyl group or a group represented by —NH-A-Z; Z represents —SO3H, —COOH or a salt thereof; and n represents an integer of from 1 to 4. When R represents —NH-A-Z, the structures represented by the two —NH-A-Zs bonded to the triazine ring contained in each of the n partial structures bonded to Q may be the same as each other or different from each other.

Abstract: A phase change ink compositions, comprising a novel colorant wax to prevent and/or reduce printhead and nozzle contamination in ink jet printers caused by drooling and faceplate staining. In particular, there is provided novel colorants containing acid groups for use in phase change ink compositions and which are compatible with phase change ink components.

Abstract: An ink set includes at least a magenta ink composition and a cyan ink composition, wherein the magenta ink composition includes: at least one colorant selected from the group consisting of specific heterylazo dyes; and at least one colorant selected from the group consisting of specific anthrapyridone dyes, and the cyan ink composition includes at least one colorant selected from the group consisting of phthalocyanine compounds meeting requirements 1 and 2: Requirement 1: The ratio of the maximum absorbance within the absorption band of from 660 nm to 680 nm to the maximum absorbance within the absorption band of from 600 nm to 640 nm on the spectral absorption curve of aqueous solution is less than 1; and Requirement 2: The oxidation potential is more positive than 1.0 eV (vsSCE).

Abstract: A coloring compound is provided which is excellent in coloring ability and transparency, has high solubility in organic solvents, and is superior in light resistance. A toner, a sheet for heat-sensitive transfer recording and an ink that use the coloring compound are also provided.

Abstract: A water-based ink for ink jet recording includes water; a water-soluble organic solvent; alcoholamine which is contained at 0.2% by weight to 0.75% by weight in the water-based ink for ink-jet recording; an anionic surfactant having a sulfate structure which is contained at 0.02% by weight to 0.2% by weight in the water-based ink for ink jet recording; and a colorant including a dye represented by general formula (1).

Abstract: A fluorinated pyridinium cationic compound of formula (I) wherein, Rf is F(CF2)6(CH2CF2)m(CH2CH2)n—, m and n are each independently integers of 1 to 3, and R is H, C1 to C5 linear or branched alkyl, or C1 to C5 linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.

Abstract: Provided is a porphyrazine dye suitable for use in ink-jet recording, the porphyrazine dye giving a cyan ink with a satisfactory hue, having various excellent fastness properties, in particular, ozone resistance, and attaining a high color density. Also provided is an ink composition containing the dye. The porphyrazine dye is a porphyrazine dye represented by formula (1) or a salt thereof. In formula (1), rings A to D each independently represents a benzene ring, a nitrogenous heteroaromatic ring, etc.; E represents an alkylene; X represents sulfoanilino, etc.; R represents a hydrogen atom, sulfo, carboxy, etc.; group F represents phenyl, a nitrogenous heteroaromatic ring, etc.; a is an integer of 1-6; b is 0.00-3.90, excluding 3.90, on average; c is 0.10-4.00, excluding 4.00, on average; and the sum of b and c is 1.00-4.00, excluding 4.00, on average.

Abstract: A water-based ink set for ink-jet recording includes: a water-based black ink containing a black colorant, water, and a water-soluble organic solvent; and a water-based cyan ink containing a cyan colorant, water, and a water-soluble organic solvent; wherein the black colorant includes a self-dispersible carbon black modified by at least one of a carboxyl group and a sulfo group; and the cyan colorant includes a dye represented by general formula (1):

Abstract: A water-based ink set for ink jet recording, includes: a water-based black ink which contains a black colorant, water, and a water-soluble organic solvent, the black colorant containing self-dispersible carbon black; and a water-based magenta ink which contains a magenta colorant, water, and a water-soluble organic solvent, the magenta colorant containing a dye represented by the general formula (1); wherein the water-soluble organic solvent includes a penetrant of which amount is 0.5% by weight to 3.5% by weight of the water-based magenta ink.

Abstract: As an ink composition which is highly soluble in water and has a hue and clarity suitable for inkjet recording, an ink composition containing at least one pigment represented by formula (1) or a salt thereof as a pigment is provided. In formula (1), Xa to Xc each independently represent a substituted or unsubstituted sulfoanilino group, a substituted or unsubstituted sulfonaphthylamino group, a hydroxy group, or the like, and at least one of Xa to Xc is a group other than a hydroxy group; R represents a hydrogen atom or the like; R1 represents an alkyl group or the like; and R3 and R4 each independently represent a hydrogen atom or the like.

Abstract: An ink jet ink providing an image having excellent lightfastness and having sticking resistance and intermittent ejection stability. The ink jet ink is characterized by containing at least a compound represented by the following general formula (I) and a compound represented by the following general formula (II).

Abstract: A reversible thermochromic system comprising a) a compound of the formula (I) or a tautomer thereof (I) wherein R1 is C1-C18alkyl, C2-C18alkenyl, C3-C12cycloalkyl, C3-C12cycloalkyl substituted by 1, 2 or 3 C1-C4alkyl; or C7-C12phenylalkyl; R2 and R3 are hydrogen or R2 and R3 together form a group —CH?CH—CH?CH—; and R4 is hydrogen, —NO2, —SO2—R1 or (4-nitrophenyl)azo; and b) a compound containing a group of the formula (II).

Abstract: A method of formulating an aqueous ink having minimal visible coloration. The method includes the steps of: providing an aqueous ink formulation containing a sulfonated water-soluble IR-absorbing naphthalocyanine dye having a central metal atom moiety; and adjusting a pH of the formulation to a pH value in the range of 4 to 6.5 so as to minimize visible coloration of the formulation.

Abstract: A method of increasing the solubility and/or dispersibility of a perylene dye in a liquid medium. The method comprises binding the perylene dye to a polymer which is soluble in the liquid medium. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: Disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound of the formula wherein X1, X2, X3, and X4 each, independently of the others, are —S—, —S(?O)—, or —S(?O)2—, R1, R2, R3, and R4 each, independently of the others, are alkyl, aryl, arylalkyl, or alkylaryl, R1?, R2?, R3?, and R4? each, independently of the others, are substituents, n1, n2, n3, and n4 each, independently of the others, are 0, 1, 2, or 3, and M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M. Also disclosed is a radiation curable ink composition comprising (a) an ink vehicle, said ink vehicle comprising at least one radically curable monomer compound, and this colorant compound.

Abstract: An indaniline dye represented by the following formula (1): wherein R1 and R2 represent an unsubstituted linear or branched alkyl group having from 2 to 5 carbon atoms; R3 represents an unsubstituted linear or branched alkyl group having from 1 to 3 carbon atoms; provided that the total number of the carbon atoms of R1, R2 and R3 is 6 or 7.

Abstract: An ink composition contains a particular anthrapyridone dye and a particular copper phthalocyanine dye. The hue angle in the L*a*b* color system calculated from spectral characteristics of a 1,000-fold diluted solution of the ink composition in water is 270° to 360°. The content of the anthrapyridone dye is higher than the content of the copper phthalocyanine dye.

Abstract: An ink composition contains a water-soluble copper compound and an anthrapyridone dye represented by the following formula: wherein M1 represents a hydrogen atom, NH4, or Na; R1 represents a hydrogen atom, a substitutable alkyl group, a substitutable aryl group, or a substitutable benzoyl group; R2 represents a hydrogen atom or a substitutable alkyl group; R3 represents a hydrogen atom, a halogen atom, or a substitutable alkyl group; R4 represents a hydrogen atom, NH4 which may be substituted, or a substitutable sulfo group; and R5 represents an acyl group or a group represented by the following formula: where X and Y independently represent a chlorine atom, hydroxy group, amino group, monoethanolamino group, diethanolamino group, morpholino group, anilino group, or phenol group in which hydrogen atoms may be substituted by one or more substituents.

Abstract: The present invention relates to a novel anthrapyridone compound represented by the following formula (1) or a salt thereof: wherein, R1 represents a hydrogen atom, an alkyl group or the like, R2 represents a hydrogen atom or a methoxy group and R3 represents an unsubstituted or substituted aryl group, or an unsubstituted or substituted a heteroaryl group, respectively; and with regard to the substitution positions of —SO2R3 and —SO3H whose substitution position are not specified and the both of which the benzene ring has thereon, one of their substitution positions is the para-position and the other thereof is the ortho-position to the substitution position of the nitrogen atom by which said benzene ring is substituted, and the compound of the present invention or a salt thereof has a hue which possesses high vividness suitable for inkjet recording, and provides a magenta coloring matter having higher fastnesses on recorded matter and excellent storage stability.

Abstract: The present invention relates to a porphyrazine coloring matter represented by the following formula (1) or a salt thereof: wherein, the rings A, B, C and D shown by broken lines each independently represent a 6-membered ring having aromaticity, at least 1.0 of said rings A to D is a benzene ring and at least 0.5 of them is a nitrogen-containing heteroaromatic ring, when shown as an average value; E represents an alkylene group; X and Y are each independently an anilino group having 1 to 3 carboxy groups; and b is 0 to 3.4, c is 0.1 to 3.5, and the sum of b and c is 1.0 to 3.5, when shown as an average value. The present invention can provide a porphyrazine coloring matter suitable for inkjet recording, which has characteristics of having a good hue as cyan ink, excellent fastnesses, in particular, extremely excellent water fastness when printed on plain paper, and high solubility in water or a water-soluble organic solvent.

Abstract: The invention is related to a weather-resistant dye and use thereof, which contains in molecules thereof not only chromophoric parent D, but also electron-accepting group Q which is linked with dye parent D through non-conjugated carbon link L to constitute D-L-Q dye molecule; the electron-accepting group Q has such a HOMO energy level that is lower than the HOMO energy level of the dye chromophoric parent D. The dye has sun-resistance and anti-ozone performances, which can be used as colorant in the ink, dope, lacquer, toner powder for laser printing, marker, paper, fabric, glass, porcelain or polymer.

Abstract: The present invention relates to a novel ink composition and, more particularly, to an ink composition for digital textile printing, which is suitable for ink-jet printing on cellulose fiber materials. The novel ink composition of the present invention has stable pH value, fine storage stability, smoothness and ease in printing, and reduction in color deterioration.

Abstract: Compounds of Formula (1) and salts thereof: wherein: M is 2H, Si, a metal, an oxymetal group, a hydroxymetal group or a halometal group; Pc represents a phthalocyanine nucleus of formula; R1 is optionally substituted alkyl other than methyl: R2 is H, optionally substituted alkyl or optionally substituted aryl; R3 is H, optionally substituted alkyl or optionally substituted aryl; R4 is a group comprising a heterocycle and an ionisable group; L is a direct bond or a divalent linking group; x is 0.1 to 3.8; y is 0.1 to 3.8; and z is 0.1 to 3.8. Also compositions, inks, printed material and in-jet processes and cartridges.

Abstract: The present invention relates to an ammonium salt or a sodium salt of an anthrapyridone compound represented by the following the formula (1): and an ink composition containing these; said compound has a hue with high vividness and high brightness suitable for inkjet recording; recorded matters recorded with an ink composition containing said compound is excellent in fastnesses such as light fastness and ozone fastness, and also particularly water fastness.

Abstract: An ink set is provided which, when used in color ink-jet printing, can give a full-color printed image having a satisfactory hue and brightness and excellent in various fastness properties. More specifically, an ink set for ink-jet recording is provided that is an ink set of at least two colors which includes at least two ink compositions, i.e., a cyan ink composition and a magenta ink composition. The cyan ink composition contains a cyan dye which is a dye represented by the following formula (7) or a salt thereof. The magenta ink composition contains a magenta dye which is a dye represented by the following formula (6) or a salt thereof.