Abstract: An inkjet color ink comprising: an aqueous medium; at least one yellow dye having a &lgr;max of from 390 nm to 470 nm and an [I(&lgr;max+70 nm)/I(&lgr;max)] ratio of an absorbance I(&lgr;max+70 nm) at &lgr;max+70 nm to an absorbance I(&lgr;max) at &lgr;max of not more than 0.4; and at least one dye having a &lgr;max of longer than 470 am and not longer than 750 nm, the at least one yellow dye and the at least one dye being at least dissolved or dispersed in the aqueous medium, wherein both of the rate constants defined herein are not more than 5.0×10−2 hour−1.

Abstract: An inkjet recording method comprising ejecting ink droplets on an image-receiving material according to recording signals to record an image on the image-receiving material, wherein at least one of the ink and the image-receiving material comprises an acid precursor capable of releasing an acid by a chemical reaction.

Abstract: An inkjet recording ink of giving an image having high image quality and excellent weather resistance is provided, which is an inkjet recording ink comprising a specific phthalocyanine dye, wherein the total amount of cations in the ink except for a lithium ion, a hydrogen ion, an ammonium ion, an organic quaternary nitrogen ion and an ion produced by the proton addition to a nitrogen atom in a basic organic material is 0.5 wt % or less.

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: The present invention provides a sheet for ink jet recording, ink for ink jet recording, manufacturing method of ink for ink jet recording, ink set for ink jet recording, and ink jet recording method, which hardly blot even under high humidity conditions, and comprises a betaine compound having a specific structure and a compound capable of taking a betaine structure.

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: 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: 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: The ink set of the present invention provides a high ejection stability, gives an image having an excellent hue, light-resistance and waterproofness and improves the image preservability under severe conditions in ink jet recording, in which the ink set comprising a plurality of inks different in hues, wherein the plurality of inks includes a yellow ink containing a coloring agent that is a dye having: a &lgr;max of from 390 nm to 470 nm; an I(&lgr;max+70 nm)/I(&lgr;max) ratio of not greater than 0.4, in which I(&lgr;max) is the absorbance at &lgr;max and I(&lgr;max+70 nm) is the absorbance at (&lgr;max+70 nm); and a forced fading rate constant of not greater than 5.0×10−2 [hour−1], an ink cartridge having the ink set received therein, an ink jet printer comprising the ink cartridge mounted therein and an image recording method.

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 &lgr;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: An ink set of the present invention that can effectively inhibit ink from blotting by using a betaine compound, which comprises at least four kinds of inks including colorless ink, wherein at least one ink of the at least four kinds of inks contains a betaine compound.

Abstract: Ink for inkjet recording comprises a dye, water, a water-miscible organic solvent and a precursor of acids, and thereby is rendered resistant to image blur even under a high humidity condition, an ink set including such ink, and an inkjet recording method, in which such ink or such an ink set is used.

Abstract: Compounds represented by formula (IV): are provided, as well as methods for synthesizing the compounds, wherein variable R21 to R28 are as defined herein.

Abstract: A light-emitting element comprising a polymer represented by the formula (1) or formula (2):

Abstract: A polymer represented by the following formula (1):

Abstract: The present invention provides an organic EL element material which can emit light having a high color purity at a low driving voltage, a high luminescence and a high efficiency and exhibits an excellent stability in repeated use. A normal organic electroluminescence element material is provided which is a heterocyclic compound produced by the condensation of a 5- or 6-membered ring with a 5- to 7-membered ring.

Abstract: An ink composition comprising water, a dye and at least one compound capable of including a dye therein, wherein the dye is dissolved or dispersed in an aqueous medium comprising the water.

Abstract: Compounds represented by formula ( TV): 1

Abstract: An organic light-emitting device material is described, comprising at least one compound represented by formula (I) or a precursor thereof: wherein R1 to R7 each independently represents hydrogen atom, a halogen atom, a cyano group, a formyl group or a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, heterocyclic, primary, secondary or tertiary amino, imino, alkoxy, aryloxy, alkylthio, arylthio, carbonamido, sulfonamido, carbamoyl, sulfamoyl, alkylcarbonyl, arylcarbonyl, alkylsulfonyl, arylsulfonyl, alkoxycarbonyl, aryloxycarbonyl, alkylcarbonyloxy, arylcarbonyloxy, urethane, ureido or carboxylic acid ester group, two or more groups selected from R1 to R7 may combine with each other to form an aliphatic carbon ring, an aromatic carbon ring, a non-aromatic heterocyclic ring or an aromatic heterocyclic ring and R4 may further represent R8 and R9 each represents hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, R8 and R9 may combine with each oth

Abstract: A material for an organic luminous device, which comprises a 1,2,4-oxadiazole compound represented by formula (1) or a precursor thereof, or comprises a homopolymer or copolymer produced from monomers comprising at least one monomer unit derived from said 1,2,4-oxadiazole compound represented by formula (1): wherein R1 and R2 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group. Also disclosed is an organic luminous device containing the material.