Ricoh Company, Ltd.

Research Laboratories of Australia Pty Ltd.

Tsuyoshi Asami

Kazuo Tsubuko

Masato Iio

Aiko Ishikawa

Tomohiro Hirade

Akihiko Gotoh

Toshiyuki Kabata

Shinya Kobayashi

Tadashi Kasai

Kazuhiko Umemura

Akio Tsujita

Kentarou Matsumoto

Momoko Shionoiri

Aiko Yamazaki

Akihiro Koseki

Kazuyo Mizuno

Tsuneo Kurotori

Takao Hiraoka

Takashi Bisaiji

Masaki Yoshino

Takeo Yamaguchi

Masakazu Terao

Yukio Tabata

Nobutaka Kinoshita

Noriaki Okada

Makoto Okawara

Katsuhiro Shinohara

Daisuke Nose

Tomoko Kino

Kathuhiro Shinohara

Takeo Kudoh

An active-energy-ray-curable composition, which satisfies the following relationships of absorbance: a ratio of absorbance at a wavelength of 400 nm to absorbance at a wavelength of 750 nm is 1.4 or more but 1.6 or less; and a ratio of absorbance at a wavelength of 365 nm to absorbance at a wavelength of 500 nm is 1.2 or less.

Active-energy-ray-curable composition, active-energy-ray-curable ink, composition stored container, apparatus and method for forming two-dimensional or three-dimensional image, two-dimensional or three-dimensional image, structure, and processed product

A curable composition containing a magenta pigment; a polymerizable compound; and a polymer including an amino group, where the polymer including the amino group has a weight average molecular weight of 1,000 or more, wherein the polymer including the amino group is at least one selected from the group consisting of hydroxyl group-including carboxylate ester, salts of a long-chain polyamino amide and acid ester having a high molecular weight, salts of polycarboxylic acid having a high molecular weight, salts of long-chain polyaminoamide and polar acid ester, unsaturated acid esters having a high molecular weight, modified polyurethanes, modified polyacrylates, polyether ester anionic surfactants, salts of naphthalenesulfonic acid formalin condensates, polyoxyethylene alkyl phosphoric acid ester, polyoxyethylene nonylphenylether, polyester polyamine, and stearylamine acetate.

Active-energy-ray-curable composition, active-energy-ray-curable ink, composition stored container, two-dimensional or three-dimensional image forming method, two-dimensional or three-dimensional image forming apparatus, and processed product

A curable composition is provided comprising at least one monomer comprising a multifunctional monomer. Each monomer has a solubility parameter (SP) of from 7 to 11 (cal/cm), and a cured film produced by curing the curable composition has a glass transition temperature of from 0&#xb0; C. to 30&#xb0; C.

Curable composition, curable ink, storing container, two-dimensional or three-dimensional image forming device, two-dimensional or three-dimensional image forming method, cured product, printed matter, and adhesive label

An active-energy-ray-curable composition including: a magenta pigment; a polymerizable compound; and a pigment adsorption component, an amount of the pigment adsorption component (A) adsorbed onto 100 mg of the magenta pigment being from 10 mg through 60 mg.

An active-energy-ray-curable composition including: a cyan pigment; and a polymerizable compound, wherein a ratio of absorbance at a wavelength of 385 nm to absorbance at a wavelength of 620 nm is 0.65 or less.

Active-energy-ray-curable composition, active-energy-ray-curable ink, composition stored container, method and apparatus for forming two-dimensional or three-dimensional image, two-dimensional or three-dimensional image, structure, and processed product

A textile printing method that includes printing to a textile with a material including a dye expressed by the following general formula 1.  In general formula 1, Rto Ris H, CH, OH, NHCH, COOH, SOH, SONa, NO, or NH.

Textile printing method, inkjet ink for textile printing, and electrophotographic toner for textile printing

A toner including a petroleum wax, wherein the petroleum wax comprises a paraffin wax having a polarity.

Toner, printed material, method of preparing printed material and image forming apparatus having varnish application means

A color image forming method, including: forming electrostatic latent image on electrostatic latent image bearing member; developing the image to form visible image with at least two toners containing releasing agent and selected from black, magenta, cyan and yellow toners; transferring the visible image to recording medium; fixing the transferred image thereon with fixing member having no releasing agent on surface thereof; and forming overcoat layer on the fixed image by polymerizing overcoat composition, wherein when lightness&#x2014;L, chromaticity&#x2014;aand chromaticity&#x2014;baccording to L*a*b* color system of the fixed image formed with the at least two toners and lightness&#x2014;L, chromaticity&#x2014;aand chromaticity-bof the fixed image after the overcoat composition is dropped at 0.4 mg/cmfrom height of 10 mm above the fixed image and the overcoat composition is removed after 10 seconds have passed are applied to the following formula (1), color difference &#x394;E* is 3.0 to 30.0:&#x394;*=[(2&#x2212;1)+(2&#x2212;1)+(2&#x2212;1)]&#x2003;&#x2003;(1).

Color image forming method and color image forming apparatus

An overcoat composition for electrophotography includes at least one of compounds having the following formulae (1) to (3): wherein R1 represents a hydrogen atom or a methyl group; wherein R1 represents a hydrogen atom or a methyl group; and n represents an integer of from 4 to 6; and wherein R1 represents a hydrogen atom or a methyl group; and a and b independently represent an integer of from 1 to 5 on the condition that a+b is from 4 to 6.

Overcoat composition for electrophotography, electrophotographic image forming method and electrophotographic image forming apparatus

An image forming method including forming an image of a toner including a wax on a recording medium; fixing the toner image using by an oil-less fixing device; and then forming an overcoat layer on the fixed toner image. When a portion of the fixed toner image having the heaviest toner weight is subjected to an ATR FT-IR analysis, a peak area ratio Ab/Aa falls in a range of 3.0 to 7.0 or a peak area ratio Ab'/Aa&#x2032; falls in a range of 0.004 to 0.014, wherein Aa represents the area of a peak present in a range of 2896 cmto 2943 cm, Ab represents the area of a peak present in a range of 2946 cmto 2979 cm, Aa&#x2032; represents the area of a peak present in a range of 791 cmto 860 cm, and Ab&#x2032; represents the area of a peak present in a range of 2834 cmto 2862 cm.

Electrophotographic image forming method

A method of evaluating electrophotographic overcoatability of a composition is provided. The method includes measuring a color (C) of a toner image fixed on a sheet, dropping the composition on the toner image, and removing the composition from the toner image. The method further includes measuring a color (C) of the toner image from which the composition has been removed, and calculating a color difference between the color (C) of the toner image and the color (C) of the toner image on which the composition is dropped and from which the composition is removed thereafter.

Method of evaluating electrophotographic overcoatability of composition, electrophotographic overcoat composition, electrophotographic method, and electrophotographic apparatus

An image forming method including forming a toner image on a transfer medium with a toner comprising a wax having a polar group, and applying a varnish to the toner image. The wax may be a plant wax having an ester group, a wax having a polar group derived from a fatty acid, an oxidized wax, or a mixture thereof. The varnish may include a surfactant, such as a polyoxyethylene glycol, and may be photocurable.

Image forming method, image forming apparatus, varnish applicator, and toner

An electrophotographic printing toner including a colorant and a resin, wherein the colorant includes a dye having at least one reactive group selected from the group consisting of SOCHOSOH, NHCOCHOSOH, NHSOCHOSOH, COCHOSOH and SOCHCH, wherein n represents an integer of from 1 to 4.

Electrophotographic printing toner, electrophotographic printing method and liquid developer for electrophotographic printing

It is an object of the present invention to provide a recording material which contains at least a colorant and a resin wherein the colorant contains silver, and a toner which contains at least a colorant and a resin wherein the colorant is an alloy containing silver, zinc and aluminum.

Recording material, toner, liquid developer and image forming method using the same

An electrophotographic liquid developer includes a carrier liquid and toner particles. The toner particles include a colorant and a resin component and are dispersed in the carrier liquid. The resin component includes a polyester resin as a main component. When 0.3 g of the liquid developer is dropped on a filter paper (which is defined in JIS P 3801) from a point of 10 mm height, the carrier liquid diffuses in the filter paper at a speed not lower than 1 mm/minute.

Growing community of inventors

Kanagawa, Japan

Tsuyoshi Asami