A process for producing pigments having a defined size and shape and also pigments produced by this process. The process has the steps: a) production of a three-dimensional surface structure on a substrate, with surface regions which are in each case partly bounded by a plurality of three-dimensional structural elements and are arranged in gaps being formed; b) application of a pigment material layer to the surface structure; c) detachment of the pigment material layer from the surface structure and production of pigments.

A method for producing a halogenated zinc phthalocyanine pigment includes a step of forming a halogenated zinc phthalocyanine crude pigment into a pigment. The halogenated zinc phthalocyanine crude pigment is obtained by deposition of a halogenated zinc phthalocyanine, which is synthesized by using a compound that generates an acid by reacting with water, and the step includes a pretreatment step of heating the halogenated zinc phthalocyanine crude pigment in water to obtain a halogenated zinc phthalocyanine prepigment having a pH of 5.0 or more.

An infrared light pass filter includes a colorant, an indium tin oxide, and a polymer. The infrared light pass filter has an average transmittance of 30% or less in a first wavelength range of 400 nm or greater and 800 nm or less, an average transmittance of 75% or more in a second wavelength range of 900 nm or greater and 1100 nm or less, and an average transmittance of 55% or less in a third wavelength range of 1300 nm or greater and 2500 nm or less.

The present invention provides a process for producing a fine organic pigment having a very small primary particle size, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including step 1 of kneading a mixture prepared by blending a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and water with each other, the water being blended in an amount of not less than 0.6 part by mass and not more than 4.0 parts by mass on the basis of 100 parts by mass of the water-soluble inorganic salt; [2] a fine organic pigment produced by the process described in the above [1]; [3] a dispersion produced using the fine organic pigment described in the above [2]; [4] a process for producing a paste of a fine organic pigment, including step 2 of cleaning the kneaded mixture obtained in the step 1; [5] a process for producing a dispersion, including step 3 of subjecting the paste of the fine organic pigment produced by the process described in the above [4], an organic solvent and water to dispersing treatment; and [6] a process for producing an ink, including step 4 of mixing the dispersion produced by the process described in the above [5], with at least one material selected from the group consisting of water and an organic solvent.

A composition for forming a colored layer contains a dye, an active energy radiation-curable resin, a photoinitiator, a solvent, and an additive. The dye contains at least one of a first coloring material, a second coloring material, and a third coloring material, with the wavelength of maximum absorption within the range of 470 to 530 nm and the full width at half maximum of the absorption spectrum is 15 to 45 nm. The wavelength of maximum absorption of the second coloring material is within the range of 560 to 620 nm and the full width at half maximum of the absorption spectrum is 15 to 55 nm. Within the wavelength range of 380 to 780 nm, the third coloring material exhibits the lowest transmittance in the range of 650 to 780 nm. The additive includes a compound A and a sulfur antioxidant.

The invention relates to use of quantum dots in a pigment dispersion liquid. The invention also relates to a pigment dispersion liquid, which comprises a pigment, quantum dots, a dispersion agent, a dispersing resin and a solvent. The invention also relates to the process for producing the pigment dispersion liquid. The use of quantum dots provided by the invention broadens the application field of the quantum dots and develops the use thereof in the field of liquid crystal display. The pigment dispersion liquid having quantum dots added therein provided by the invention has a significantly improved stability of dispersion. Furthermore, the quantum dots and the organic pigment can interact with each other by adjusting the composition, the size or the like of the quantum dots, so that the properties of the pigment are improved and the contrast thereof is increased.

Provided are a composition including a coloring agent having a structure represented by Formula (1), an organic solvent, and a curable compound, in which a solubility of the coloring agent having a structure represented by Formula (1) in propylene glycol methyl ether acetate at 25 C. is 100 mg/L or less; a compound having a structure represented by Formula (4-1); a film formed of the composition; a near-infrared cut filter; a pattern forming method; a laminate; a solid-state imaging element; an infrared sensor; an image display device; a camera module; and a novel compound.
(Dye).sub.n-L.sup.1(1) In Formula (1), L.sup.1 represents an n-valent linking group, n represents an integer of 2 to 10, where in a case where n is 2, L.sup.1 may be a single bond, and Dye's each independently represent a coloring agent structure having a maximal absorption wavelength in a wavelength range of 650 nm to 2,000 nm.

A pigment dispersion for aqueous cosmetic compositions and an aqueous cosmetic composition, the pigment dispersion comprising, at least an aluminum lake such as Red No. 40; at least one dispersant selected from polyorganic acids and salts thereof, and nonionic surfactants; and water and a water-soluble organic solvent.

An optical filter including: a substrate; and a dielectric multilayer film laid on or above at least one major surface of the substrate as an outermost layer, in which the substrate includes a resin film including a dye (IR) and a resin, the dye (IR) has a maximum absorption wavelength in a wavelength of 680 to 800 nm in the resin, and the optical filter satisfies specific spectroscopic characteristics.

An object of the present invention is to provide a pigment composition capable of exhibiting good dispersibility and dispersion stability of a pigment in a polyurethane ink or the like, and a colorant and a liquid ink containing the pigment composition. Specifically, the pigment composition of the present invention contains at least one organic pigment selected from the group consisting of benzimidazolone azo pigments and quinacridone pigments, and at least one polycarboxylic acid compound represented by the following Formulae (I) to (II).

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(The descriptions in Formula (I), Formula (II), and Formula (II) are as described herein.)