An aqueous ink comprising a dispersion of a capsule composed of a polymeric shell surrounding a core, the core comprises one or more chemical reactants capable of forming a reaction product upon application of heat and/or radiation, the shell is stabilized by cationic dispersing groups and a colorant stabilised by cationic dispersing groups.

The present application relates to the field of black coloring of materials made from wood, such as reconstituted wood panels or paper/cardboard. The black coloring composition for wood-based materials includes a black pigment, a reactive type black dye and water. It is also possible to prepare a dry extract for some special applications.

The issue of the present invention is to provide a disazo pigment in which the polychlorinated biphenyl (PCB) content in addition to the primary aromatic amine (PAA) content is reduced. The present invention provides a pigment composition containing a disazo pigment, an alkylamine that has an alkyl group having a carbon number of 8 or more, and a poly(oxyethylene) alkyl ester that has an alkyl group having a carbon number of 8 or more. Preferably, the disazo pigment includes at least one disazo pigment selected from a group consisting of C.I. Pigment Yellow 83, C.I. Pigment Yellow 13, and C.I. Pigment Yellow 14.

The present invention provides an aqueous pigment dispersion liquid being such that a pigment is finely dispersed, and the viscosity, and the particle diameters of the pigment are unlikely to fluctuate, being excellent in storage stability, and enabling preparation of an emulsion-polymerized toner having properly controlled particle diameters while improving the pigment utilization rate. The aqueous pigment dispersion liquid is an aqueous pigment dispersion liquid for an emulsion-polymerized toner containing a pigment, a dispersant, and an aqueous medium. The dispersant is a polymer containing a constitutional unit (A) derived from a monomer (A) such that a group containing a (meth)acryloyloxy group or the like is bonded to one end of a particular polyethylene glycol chain or the like, and a constitutional unit (B) derived from a monomer (B) having a carboxy group or the like, the polymer has a number average molecular weight in terms of polystyrene of 4,000 to 15,000, as measured by gel permeation chromatography, the polymer is contained in a state of being not ionized substantially, and the aqueous pigment dispersion liquid has a pH of 3.0 to 8.4.

A method for preparing dispersant using lignin degradation products includes preparation of lignin degradation products: degrading lignin which are used as raw materials using alkali through microwave-assisted activation at the presence of a metal oxide catalyst to obtain the lignin degradation products; and preparation of dispersant: preparing dispersant by molecularly reforming and chemically modifying the lignin degradation products obtained in the step of preparation of lignin degradation products.

Aqueous pigment preparations contain at least one organic and/or inorganic pigment and/or filler, at least one dispersant of formula (I) or (II), or mixtures of dispersants of formulae (I) and (II), wherein n is an integer ≥1, z is an integer ≥1, R1 is an aliphatic, linear or branched hydrocarbon radical with 1 to 30 carbon atoms or a hydrogen atom or the structural unit —O—X or the structural unit CH.sub.2—O—X, and the structural unit X of formula (III), wherein a is an integer from 1 to 50, b is an integer from 0 to 50, c is an integer from 1 to 100, m is an integer from 1 to 50, R2 is an aliphatic, linear or branched hydrocarbon radical with 1 to 30 carbon atoms, Y is hydrogen, SO.sub.3M, —SO.sub.2M, —PO.sub.3M.sub.2, —CH.sub.2COOM and M is hydrogen or a cation. Additional additives may be present.

Provided herein are color charts and water color pigment solutions useful, for example, in the calibration of reflectance-based diagnostic analyzers.

A coloring composition which contains an isoindoline compound represented by formula (1) (wherein A represents a group that is expressed by formula (2), formula (3) or formula (4)) and a dispersion medium.

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A colored dispersion that contains (A) C.I. Disperse Orange 25, (B) a specific dye such as C.I. Disperse Orange 49, 62, 71, 73, or 148, and water. When the total (A) C.I. Disperse Orange 25 and (B) specific dye content of the colored dispersion is 100 parts by mass, the (B) specific dye content of the colored dispersion is less than 20 parts by mass. A recording medium to which the colored dispersion has been adhered and a textile printing method for hydrophobic fibers that uses the colored dispersion.

A new yellow pigment excellent in both brightness and coloring power is provided. It has been found that dimerization of a specific quinophthalone skeleton gives more selective absorption and transmittance. Furthermore, the dimerization method was also studied, and it has been found that excessive reddish tone can be suppressed by cleaving the conjugate using a methylene chain as a spacer instead of simply employing a direct bond. In addition, dispersibility has been improved by polyhalogenation and introduction of an imide structure. Furthermore, a coloring agent containing the quinophthalone compound and a coloring composition containing the coloring agent are provided.