Abstract: The present invention relates to new compounds, which are molecular combinations of a phthalocyanine and a mono-azo dyestuff linked via specific linking groups and to a process for their preparation. Further aspects are shading compositions using these compounds.

Abstract: The invention relates to the dyeing of human keratinous fibres, in particular the hair, using anionic direct dyes or acid dyes having a tetraalkylammonium counterion of formula (I) with Col(?)m. R1, R2, R3, R4, m, and n as defined in the description. A subject-matter of the invention is a dyeing composition comprising an anionic dye of formula (I) and a method for dyeing keratinous fibres, such as the hair, employing the said composition. A subject-matter of the invention is likewise novel dyes of formula (I) and their uses for the colouring of keratinous fibres. This composition makes it possible to obtain a chromatic, powerful and particularly persistent colouring on keratinous fibres.

Abstract: The present invention relates to new compounds, which are molecular combinations of a phthalocyanine and a mono-azo dyestuff linked via specific linking groups and to a process for their preparation. Further aspects are shading compositions using these compounds.

Abstract: Magenta ink exhibiting excellent coloration on various recording materials is provided according to the present invention. The magenta ink can realize high image densities and can produce images having superior light resistance.

Abstract: Monoazo dyes of formulas (IV) wherein R1, R2, R3, m, n and M are as described in the specification, are excellent dyes for dyeing and printing of cellulose containing materials and especially for the preparation of inks for ink jet printing.

Abstract: A hardness indicator composition, and a method of water hardness analysis, capable of measuring hardness even with higher-hardness water without requiring titration by a two-liquid system. The hardness indicator composition is formulated of a metal indicator with a desensitizer added thereto.

Abstract: A toning agent for an azo pigment, an azo pigment with a modified tone, and process for preparing the same are provide. 2-hydroxynaphthalene-3,6-dicarboxylic acid or a derivative thereof is admixed with a primary coupler component for an azo pigment and the mixed coupler composition and an aromatic diazonium are coupled.

Abstract: Monoazo dyes of formulas (IV) 1

Abstract: Magenta ink exhibiting excellent coloration on various recording materials is provided according to the present invention. The magenta ink can realize high image densities and can produce images having superior light resistance. The magenta ink contains first and second coloring materials represented by the following general formulae 1 and 2, respectively, and a water-based medium.

Abstract: A process for diazotizing an amine comprises the steps of oxidizing nitric oxide in solution with an oxidizing agent to maintain an equilibrium concentration of a diazotizing agent and reacting a primary aromatic amine in situ with said diazotizing agent in said solution.

Abstract: A water-soluble dye for a color subtractive, lightfast, wide spectrum ink as follows: ##STR1## wherein: X is ##STR2## R.sub.1 is: an aliphatic radical having from 1 to 18 carbon atoms; the radical ##STR3## in which R.sub.2 is --H, -lower alkyl of 1 to 4 C atoms, -lower alkoxy, -halogen, --NO.sub.2 --CN, --CO.sub.2 H;R.sub.3 is --H, -lower alkyl having 1 to 4 C atoms, -halogen, --CO.sub.2 H;M is H, Li, Na, K, --N(R.sub.4).sub.4 in which R.sub.4 is H, ##STR4## in which R.sub.5 is --H, -lower alkyl, and.sub.n is 1 to 4; and in which one of the --SO.sub.3 M groups on the amino-naphthol radical is positioned meta or para --SO.sub.3 M is meta to the --OH.and the dye in a water and glycol vehicle. A dye set of this dye, Direct Blue 199, and Direct Yellow 132 provides a full color spectrum of bright, lightfast colors.

Abstract: A process for the preparation of azo dyes of formula ##STR1## wherein K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series, and the hydroxy group is attached to K adjacent to the azo group, X is hydrogen or nitro and M is an alkali metal ion, which process comprises coupling a diazo component of formula ##STR2## in the presence of one or more buffer mixtures and in the absence or presence of an alkali metal chloride, to a coupling component of formula ##STR3## in which formulae (2) and (3) K and X are as defined for formula (1). The present invention makes it possible to prepare the azo dyes in high yields.

Abstract: An ink composition for ink jet recording, which contains a water-soluble dye, an organic solvent and water, in which the dye is represented by the formula (1) as shown in the state of free acid:D--(SO.sub.2 CH.sub.2 CH.sub.2 SO.sub.3 H).sub.m (1)wherein D represents a dye residue selected from the group of monoazo and polyazo dyes, their complexes with Cr, Fe, Co and Cu, copper and nickel phthalocyanine dyes, anthraquinone dyes, dioxazine dyes, and formazane complex dyes, and m represents an integer of 1, 2, 3 or 4, and which is superior in its stability during preservation and while being used, thermal stability, image clearness, water resistivity, light fastness, etc.

Abstract: A process for the preparation of azo dyes of formula ##STR1## wherein K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series, and the hydroxy group is attached to K adjacent to the azo group, X is hydrogen or nitro and M is an alkali metal ion or an ammonium ion, which process comprises coupling a diazo component of formula ##STR2## in the presence of a zinc salt and in an inert gas atmosphere, to a coupling component of formula ##STR3## in which formula (2) and (3) above K and X are as defined for formula (1). The process makes it possible to obtain the azo dyes in high yield.

Abstract: An azo pigment composition which forms a dispersion having high tinting strength and excellent clearness, transparency, fluidity and storage stability, and which is formed from a coupling reaction between a diazo component and a coupler component, and contains a compound represented by formula (I) ##STR1## wherein Q represents a diazo or coupler component moiety, A represents a divalent bonding group selected from a class consisting of --CONR'--, SO.sub.2 NR'--, --CH.sub.2 NH-- and --CH.sub.2 NHCOCH.sub.2 NH-- in which R' represents a hydrogen atom, alkyl group having 1 to 20 carbon atoms or aryl group,each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a hydrogen atom, alkyl group having 1 to 20 carbon atoms or alkenyl group having 2 to 20 carbon atoms, and R.sub.3 and R.sub.

Abstract: Process for the preparation of azo dyes of the formula ##STR1## in which K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series in which the hydroxyl group is attached to K in a position adjacent to the azo group, X is hydrogen or nitro and M is an alkali metal ion or ammonium ion, which comprises coupling a diazo component of the formula ##STR2## in the presence of an alkali metal chloride and ammonium chloride with a coupling component of the formula (3) ##STR3## K and X in the formulae (2) and (3) being as defined under formula (1). The present invention allows the preparation of the said azodyes in high yields.

Abstract: Improvement in a process for producing an arylazo-aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR1## wherein A is a phenyl or naphthyl group unsubstituted or substituted by one to four members selected from alkyl, alkoxy, phenoxy, sulfonic acid, carboxylic acid, arylamino, amino, nitro and hydroxyl groups and halogen atoms, and m is 0 or 1, which comprises reacting an aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR2## wherein m is as defined above, with a dibasic acid anhydride to obtain an acylaminonaphtholsulfonic acid, coupling a diazonium compound of amine of the formula,A'--NH.sub.

Abstract: The color of azo pigments derived from 2-hydroxynaphthalene-3-carboxylic acid or its salts are improved by the coupling reaction of a diazonium compound of an aromatic aminosulfonic acid with a coupling component which is a mixture of (1) 2-hydroxynaphthalene-3-carboxylic acid or its salt, (2) .beta.-naphthol or its salt, and (3) a phenolic by-product having a molecular weight of about 300 and containing about 1 equivalent of phenolic hydroxy groups. The phenolic by-product can be obtained by evaporating .beta.-naphthol from a tarry substance formed as a by-product during the reaction of an alkali .beta.-naphtholate with carbon dioxide, extracting the residue with an alkali and precipitating the soluble matter with an acid. The color or tone of the azo pigment is stabilized by the use of the coupling component.

Abstract: Chromium complex dyestuffs of the formula ##STR1## wherein X denotes hydrogen or nitro,Y denotes hydrogen, nitro or chlorine andZ denotes hydrogen, nitro, chlorine, alkyl, alkoxy, alkylsulphonyl, arylsulphonyl or SO.sub.2 NW.sub.1 W.sub.2 andW.sub.1 and W.sub.2 denote hydrogen, aryl or alkyl, with the proviso thatY and Z do not simultaneously represent nitro, are particularly suitable for dyeing polyamides and wool, on which they produce level dyeings having good general fastness properties.