Abstract: A novel fluorescent ink is provided which contains at least a coloring material and an aqueous liquid medium for dissolving the coloring material, wherein the coloring material comprises C.I. Acid Red 52 and at least one direct dye, the content of the C.I. Acid Red 52 ranging from 0.1 to 0.4% by weight based on the total amount of the ink, and the content of the direct dye ranging from 0.15 to 0.4% by weight based on the total amount of the ink, and the weight ratio of the direct dye to the C.I. Acid Red 52 is not higher than 1.6. This fluorescent ink is capable of forming prints with fluorescence of high intensity and with high water resistance.

Abstract: The invention relates to a dye mixture consisting essentially of one dye of formula (4) and a dye of formula (5).

Abstract: A process for printing an image on a substrate comprising applying thereto a composition comprising a liquid medium and a compound of Formula (1): T-Q-N?N-L-T??Formula (1) wherein: each T independently is an azo group; Q is an optionally substituted, optionally metallised 1,8-dihydroxynaphthyl group; and L is a divalent organic linker group. Also claimed are compositions and dyes.

Abstract: This invention relates to an ink composition comprising a dye represented by Formula I: wherein R1 is independently a non-metallic substituent; s is 0, 1, 2, 3, or 4; R2 is hydrogen or a non-metallic substituent; R3 is a substituted or unsubstituted aromatic or heterocyclic group with the proviso that if R3 is a quinoline moiety, the azo group is not bonded to the 5, 6, 7 or 8 position of the quinoline ring; wherein the dye must bear at least one ionizable group that is capable of imparting water solubility to the dye. It also relates to dyes which comprise a specific subset of the above dyes.

Abstract: An ink jet ink comprising: a) at least one first metal complex black dye that when printed alone on a receiving element gives a CIELAB a* value>0 and at 1.0 Status A visual density; b) at least one second metal complex black dye that when printed alone on a receiving element gives a CIELAB a* value<0 and at 1.0 Status A visual density; and c) at least one yellow azo-aniline yellow dye or metal complex yellow dye or mixtures thereof.

Abstract: A composition comprising a liquid medium and a compound of Formula (1) or salt thereof: wherein: A is optionally substituted phenyl or naphthyl provided A is not 2-sulpho-4-methoxyphenyl; B is optionally substituted phenylene or naphthylene; n is 0 or 1; D is a pyrazolonyl group; and wherein the liquid medium comprises an organic solvent. Also claimed are inks comprising said compositions and processes for printing.

Abstract: Provided is a black ink for inkjet recording obtained by dissolving and/or dispersing, in an aqueous medium, at least one black azo dye having a specific property or structure and further containing at least one metal chelating agent, which is excellent in durability of image including image quality and discharge property even after the ink is filled in an ink cassette and stored for a long period of time while being set in a printer.

Abstract: A composition comprising a liquid medium and a compound of Formula (1) or salt thereof: wherein: A is 2-sulpho-4-methoxyphenyl; B is optionally substituted phenylene or naphthylene; n is 0 or 1; and D is a pyrazolonyl group; wherein the liquid medium comprises an organic solvent, inks comprising this composition and printing processes.

Abstract: The present invention provides an aqueous ink composition comprising a color microparticle dispersion including an oil-soluble dye, a hydrophilic organic solvent and a perfluoroalkylenesulfonic acid or a fluorine type surfactant other than derivatives thereof, and an ink jet method for recording an image by using this aqueous ink composition.

Abstract: The present invention provides an ink set, in which in ink jet recording, an ejection stability is enhanced, hues, light resistance and water resistance of an image obtained are made excellent, and image keeping quality under severe conditions is improved, wherein the color ink set comprising a plurality of inks different in hues in order to record on a recording medium, the ink set comprising as a black ink at least a specified coloring agent, which has a ?max of 500 nm to 700 nm and a half value width in an absorption spectrum of a dilute solution normalized to an absorbance of 100 nm or more, an ink cartridge containing the same, an ink jet printer carrying them, and an image recording method.

Abstract: This invention relates to an ink jet ink set comprising; A) a cyan ink comprising an aqueous vehicle and a sulfonated copper phthalocyanine dye, B) a magenta ink comprising an aqueous vehicle and an azo-naphthol derivative magenta dye, a metal complex magenta dye, or a anthrapyridone magenta dye or mixtures thereof, C) a yellow ink comprising an aqueous vehicle and a pyrazoleazoindole yellow dye or azo pyrazole-azole yellow dye or mixtures thereof and D) a black ink comprising an aqueous vehicle and a metal complex black dye.

Abstract: A black ink for ink-jet recording, which is excellent in durability of image (including durability of image quality) and discharging property, obtained by dissolving and/or dispersing at least one black azo dye having a particular property or structure in an aqueous medium, wherein a transition metal ion content of the black ink is 0.1 mmol/l or less.

Abstract: A water-soluble complex dye capable of forming an image having light resistance, ozone resistance and high saturation; a water-based recording fluid, particularly an ink jet recording fluid, employing such a dye; an ink set employing such a recording fluid; and an ink jet recording method, are presented.

Abstract: The present invention provides an ink for ink jet recording, in which the formation of a high-quality image is possible, image keeping quality is excellent, the ink is not dried at an ink jet head, and ejection stability is high, wherein the ink for ink jet recording comprises: at least one dye having a specific structure, in which the at least one dye is dissolved or dispersed in an aqueous medium; and a betaine surfactant, wherein, when the ink has been shaken 30 times or more for 10 seconds and allowed to stand for 3 minutes, a bubble height in the ink is 30 mm or less.

Abstract: An ink for ink jet recording which provides high-quality images excellent in weather fastnesses is provides, which is an ink for ink jet recording, comprising a yellow dye having a specific characteristic wherein the total amount of a cation other than a monovalent metal ion, a hydrogen ion, an ammonium ion, an organic quaternary nitrogen ion and an ion formed by proton addition to the nitrogen atom in basic organic material is not more than 0.5 wt % based on the amount of the ink.

Abstract: There are described metal-complexed azo dyes which are useful in ink jet printing applications. Also described are ink jet ink compositions including a dye of the invention as well as ink jet printing methods and apparatus.

Abstract: The invention provides an inkjet ink which exhibits, at the printing particularly on paper, excellent ink permeability to eliminate the problem of soiling immediately after printing, can be polymerized in higher sensitivity after printing and enables the recording of an image excellent in water resistance and light fastness through polymerization curing, the inkjet ink comprising a coloring fine particle dispersion containing coloring fine particles and at least one oil-soluble dye, a polymerizable hydrophobic ethylenic unsaturated monomer and a polymerization initiator, the at least one oil-soluble dye having an oxidation potential of 1.0 V or more.

Abstract: The present invention is drawn to dye sets for formulating ink-jet ink sets, and to specific ink sets. The dye set can comprise cyan colorant including a phthalocyanine dye; magenta colorant including a copper- or nickel-containing azo dye; and yellow colorant including at least one of Yellow 1189 dye and Yellow 104 dye yellow colorant having the structure Formula 1: wherein R1 is H, SO3M, COOM, or SO2NH2; and wherein R2 is H, SO3M, COOM, or SO2NH2; and wherein R3 is H or CH3; and wherein n and m are 2, 3, 4, 5 or 6; and wherein M is H, Na, Li, K, ammonium, ammonium substituted with alkyl or combinations thereof. Optionally, a cyan triarylmethine dye such as Acid Blue 9, or another similar cyan dye, can be blended with the phthalocyanine dye; a rhodamine dye can be blended with the copper- or nickel-containing azo dye; and/or Acid Yellow 17 or Acid Yellow 23 can be blended with Formula 1.

Abstract: A metal chelate compound of the Formula (1) and salts thereof: wherein: one of A and B is OH and the other is an azotriazole group; and M is a metal or boron; and n is 0 to 4; compositions and inks containing a compound of Formula (1), a process for ink jet printing using the inks and an ink jet printer cartridge containing the ink.

Abstract: A process for printing an image on a substrate comprising applying thereto by means of an ink jet printer an ink containing a metal chelate compound of the Formula (1) and salts thereof: wherein: one of A and B is OH and the other is an azotriazole group; each W independently is a carboxy or carbonamido group; each X independently is a substituent other than H, sulphonamido, carboxy, sulpho and carbonamido; J is a sulphonamido group; M is a metal or boron; a, p, q and n are each independently 0, 1, 2, 3 or 4; and (p+q+a+n) is 0, 1, 2, 3 or 4. Also claimed are compounds of Formula (1), compositions and inks containing a compound of Formula (1) and an ink jet printer cartridge containing the ink.

Abstract: An ink set having a yellow ink containing at least one yellow dye, a magenta ink containing at least one magenta dye, and a cyan ink containing at least one cyan dye, wherein an oxidation potential of the magenta dye and an oxidation potential of the cyan dye are each higher than 0.8 V (vs SCE), and an inkjet recording method using the ink set.

Abstract: The ink set for ink jet recording of the present invention, which exhibits a high recorded image quality, an excellent image preservability (heat stability, light fastness, oxidation resistance) and little change of color balance with time, and an ink jet recording method using same, and which comprises a plurality of inks containing a dye, a water-miscible organic solvent and water, wherein the ink set comprises at least yellow, magenta, cyan, black and dark yellow inks, and the dark yellow ink contains at least one of a magenta-azo dye having a specific structure having a 6-membered heterocyclic group connected to diazo group and a cyan dye having a specific structure.

Abstract: An ink, which contains at least one dye of formula (1): A—N?N—BX1n1B?—N?N—A???Formula (1) wherein A and A? each independently represent an aryl group or a monovalent heterocyclic group; B and B? each independently represent an arylene group or a divalent heterocyclic group; X1 represents a divalent linking group; n1 is 0 or 1; and at least one of A, B, A?, and B? is a heterocyclic group.

Abstract: A compound which can be used as a dye and is represented by the following general formulae (I), (II) and (III). In the general formulae, A and B each independently represents a monovalent heterocyclic group bonded to an azo group by a carbon atom of the monovalent heterocyclic group; m and n each independently represents one of 0 and 1; and M represents one of a hydrogen atom and a monovalent positive ion.

Abstract: An ink containing at least one dye represented by formula (1): wherein R1, R2 and R3 are each independently a hydrogen atom or a monovalent group; Z is a nitrogen atom, or a carbon atom to which a hydrogen atom or a monovalent group is bonded; and at least one of R1, R2, R3, and the monovalent group that Z has is a substituent having a heterocyclic group substituted with an azo group.

Abstract: A thermal transfer ink is provided, which includes: at least one dye (a); at least one dye selected from the group including dye (b), dye (c) and a mixture thereof; and a medium; wherein (a) is a dye having a pyrazolone methine skeleton, (b) is a dye having a quinophthalone skeleton, and (c) is a dye having an aminopyrazole azo skeleton.

Abstract: An ink composition comprising at least one of water-soluble dyes represented by the following formulae (1) to (3) and a surfactant:

Abstract: A novel fluorescent ink is provided which contains at least a coloring material and an aqueous liquid medium for dissolving the coloring material, wherein the coloring material comprises C.I. Acid Red 52 and at least one direct dye, the content of the C.I. Acid Red 52 ranging from 0.1 to 0.4% by weight based on the total amount of the ink, and the content of the direct dye ranging from 0.15 to 0.4% by weight based on the total amount of the ink, and the weight ratio of the direct dye to the C.I. Acid Red 52 is not higher than 1.6. This fluorescent ink is capable of forming prints with fluorescence of high intensity and with high water resistance.

Abstract: An ink composition for inkjet recording comprising: an azo dye having an aromatic nitrogen-containing 6-membered heterocycle as a coupling component; an aqueous medium; and a surfactant, wherein the azo dye is dissolved or dispersed in the aqueous medium.

Abstract: A metal chelated dyestuff for inkjet recording comprising a water soluble azo metal chelated compound formed by an azo-based compound represented by the following general formula (1) having one or more hydrophilic group per molecule and a metal element; an aqueous inkjet recording liquid comprising an aqueous medium and the aforementioned metal chelated dyestuff; and an inkjet recording method using the aforementioned recording liquid are described, wherein the heterocyclic ring containing X1 is a triazole ring or the like; and Ar1 represents naphthyl group having a chelated group.

Abstract: Multicolor dye set with high chroma and broad color space. The dye set of the present invention is suitable for color inkjet printing and includes (1) Direct Blue 199 dye, Acid Blue 9 dye, and Direct Blue 87 dye; (2) Reactive Red 158 dye, Reactive Red 159 dye, and Acid Red 92 dye; and (3) Acid Yellow 23 dye and Direct Yellow 86 dye. The dye set of the present invention has light-fastness and water-fastness when used in thermal bubble inkjet printers. In addition, the dye set has special viscosity, good surface tension, broad color space, and high quality color image, greatly improving printing properties.

Abstract: An inkjet ink comprising at least one dye having a heterocyclic ring and a metal ion in an aqueous medium, wherein the ink jet ink further comprises a compound capable of accelerating aggregation of the dye in the aqueous medium.

Abstract: An ink containing: an aqueous medium; and at least one dye in which a ratio of a total atomic weight of hetero elements contained in a dye molecule to a dye molecular weight is from 40 to 90%.

Abstract: An ink obtained by dissolving at least one specific dye in an aqueous medium, wherein the dyes contained in the ink all have a solubility of 15 g or more in 100 g of water at 25° C. under atmospheric pressure; and an ink set formed from the ink. The dye is preferably a dye having an oxidation potential of 1.0 V (vs SCE) or more, more preferably a specific azo dye having a heterocyclic group of a specific structure or an aromatic group which is bound directly to an azo group, or a specific phthalocyanine dye having a water-soluble group as a substitunet. According to the present invention, an ink, specifically an inkjet ink, and an ink set, which can print an image without disorder or beading due to ejection failure and ensure excellent ejection stability and durability, is provided.

Abstract: An ink set comprising: at least two kinds of inks, each of the at least two kinds of inks having a common hue and different densities, and containing an aqueous medium and a dye, wherein each of the at least two kinds of inks has a corresponding discoloration velocity constant (k) for an image printed with each one of the at least two kinds of inks, and a ratio defined by a minimum value (kmin) selected from among said corresponding constants divided by a maximum value (kmax) selected from among the corresponding constants, is within a range of 0.7 to 1.0.

Abstract: An ink comprising at least one dye in an aqueous medium, wherein the dye satisfies a relation of &egr;1/&egr;2>1.2 wherein &egr;1 represents a molar extinction coefficient obtained from absorbance at the maximum wavelength of a spectral absorption curve obtained by measuring an aqueous solution of the dye having a concentration of 0.1 mmol/liter using a cell having a light pass length of 1 cm and &egr;2 represents a molar extinction coefficient obtained from absorbance at the maximum wavelength of a spectral absorption curve obtained by measuring an aqueous solution of the dye having a concentration of 0.2 mmol/liter using a cell having a light pass length of 5 &mgr;m.

Abstract: A lightfast colorant and a lightfast ink composition include a lightfast colorant that is derived by covalently binding a benzophenone derivative and a conventional colorant and that imparts effective lightfastness and long-term storage stability to an ink composition that is prepared with the same.

Abstract: Inkjet ink composition with high chroma. The inkjet ink composition includes 0.1 to 15 weight % of Acid Red 92; at least one red colorant other than Acid Red 92; and an aqueous solution medium. By means of the addition of Acid Red 92, the chroma of magenta color of the ink composition is increased.

Abstract: There are described metal-complexed azo dyes which are useful in ink jet printing applications. Also described are ink jet ink compositions including a dye of the invention as well as ink jet printing methods and apparatus.

Abstract: The invention provides an inkjet black ink ensuring excellent image durability capable of satisfactorily maintaining the image quality such as non-loosening of black and gradation even when the image is stored for a long period of time, which is a inkjet black ink having a discoloration rate constant (kvis) of 5.0×10−2 [hour−1] or less, which is measured by using an ozone gas, the ink comprising an aqueous medium having dissolved or dispersed therein at least one dye selected from (1) an azo dye having a specific structure where a heterocyclic group is bonded to both of two N atoms, (2) a phthalocyanine dye having a specific structure, (3) an azo dye having a specific structure where a 5-membered heterocyclic group is bonded to one of two N atoms and a 6-membered 2-amino heterocyclic group is bonded to the other, and (4) a bisazo dye constituted by a specific aromatic or heterocyclic group and an azo group.

Abstract: An ink, which contains at least one dye of formula (1):

Abstract: The invention relates to a dye mixture essentially consisting of one dye of formula (4) and a dye of formula (5). The black dye mixture is advantageously used for ink jet printing and provides high light-resisting and neutral black ink formulations.

Abstract: A metal chelated dyestuff for inkjet recording is described, which is a water soluble azo metal chelated compound formed from an azo compound represented by the following general formula (1) and a metal element and is good at the clearness of color tone, light resistance, indoor discoloring and fading property, solubility, storage stability, and the like.

Abstract: A compound which can be used as a dye and is represented by the following general formulae (I), (II) and (III). In the general formulae, A and B each independently represents a monovalent heterocyclic group bonded to an azo group by a carbon atom of the monovalent heterocyclic group; m and n each independently represents one of 0 and 1; and M represents one of a hydrogen atom and a monovalent positive ion.

Abstract: Disclosed are metal complexes of trisazo dyes of the general formula 4 wherein R1 through R6 are as defined in the specification. The dyes are useful for dyeing and printing natural and synthetic fiber materials, recording fluids, especially for the inkjet process, liquid formulations for paper pulp dyeing, and also as colorants for electrophotographic toners, powder coatings and color filters including the dyes of the invention.

Abstract: 1. A compound of Formula (1) and salts thereof: wherein: A is a substituted phenyl group carrying a group of the formula —NR3R4 and an ortho group selected from sulpho, phosphonato and phosphinato; n is 0 or 1; L1 and L2 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or L1 and L2 together with the N atom to which they are attached form an optionally substituted 5- or 6-membered ring; R1 and R2 are each independently optionally substituted alkyl or optionally substituted alkoxy; and R3 and R4 are each independently H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl, or R3 and R4 together with the nitrogen atom to which they are attached form an optionally substituted 5- or 6-membered ring; or R3 is H, optionally substituted alkyl, optionally substituted cycloalkyl or optionally substituted aryl and R4 is an acyl group.

Abstract: A metal chelated azo dyestuff containing at least one hydrophilic group and having formula (1): wherein M is a metal; A, B and C are each independently a substituted or unsubstituted aromatic ring; D is an aromatic ring optionally substituted by a group other than an azo group; m is 0 or 1; n is an integer from 0 to 3; p is an integer from 0 to 2; q is an integer from 1 to 3; with the proviso that in the event of a plurality of B's, they are the same or different; R1 and R2 are each independently hydrogen or a substituent group; M is tridentate or of higher coordination; and optionally a metal ion coordinated to A and B, B and B in the event of plural B's separated by azo or B and C, in the form of the structure: —O—M—O—.

Abstract: A compound comprising a disazo chromophore and an optionally substituted heterocyclic group linked together through a —SO2—NH— group, inks comprising these compounds, ink jet printer cartridges containing these inks and their use in ink jet printing.

Abstract: Compouns of formula (I) 1

Abstract: An oil-soluble dye prepared by subjecting a water-soluble dye having at least one group selected from the group consisting of sulfonate group and carboxyl group in its molecule to amidation: a water-based ink comprising the oil-soluble dye: and a process for preparing an oil-soluble dye, comprising halogenating a water-soluble dye having at least one group selected from the group consisting of sulfonate group and carboxyl group in its molecule, and thereafter subjecting the resulting halogenated water-soluble dye to amidation. The Oil-soluble dye of the present invention can be suitably and favorably used for inks for inkjet recording, inks for ball-points pens, inks for markers, toners, paints such as lacquers, inks for felt pens, and the like.