Konica Corporation

Konica-minolta Holdings, Inc.

Konica Minolta, Inc.

Atsushi Tomotake

Takahiro Matsuzawa

Kenzo Nakazawa

Miyako Sugihara

Masaki Nakamura

Shuji Kida

Hidenobu Ohya

Hidetaka Ninomiya

Noboru Mizukura

Mayumi Tomotake

Eisaku Katoh

Fumio Ishii

Makoto Kaga

Masayuki Ushiku

Motoaki Sugino

Yutaka Kaneko

Shinichi Suzuki

Shuichi Sugita

Shigeto Hirabayashi

Nobuaki Kagawa

Takatugu Suzuki

Tomomi Yoshizawa

Satoshi Nakagawa

Hiroshi Watanabe

Toshihiko Iwasaki

Yorihiro Yamaya

Nobuyuki Takiyama

Junji Ito

Junichi Kohno

Kaori Fukumuro

Kenichi Ohkubo

Kouki Kawashima

Yoshiko Iwai

Toru Kubota

Kenzi Kadokura

Yukako Taka

An active-energy-ray-curable inkjet ink composition which contains at least two polymerizable monomers each having an unsaturated bond, wherein the maximum value of the difference in electric charge of carbon atoms that constitute the unsaturated bond in each of the at least two polymerizable monomers is 0.24 to 0.46 inclusive and the total content of ions of the elements Fe, Co, Ca, Na, Mg, Al, Ti, Sn and Zn is 5.0 to 100 ppm inclusive, or the difference in e value of the unsaturated double bond moiety in each of the at least two polymerizable monomers is 2.8 to 6 inclusive, and wherein a compound which is unpolymerizable and has a substituent capable of reacting with a nucleophilic agent or an acidic compound is contained.

Active-energy-ray-curable inkjet ink composition, active-energy-ray-curable inkjet ink, and inkjet recording method

An ink jet recording sheet having a porous ink receiving layer is disclosed. The porous ink receiving layer contains a compound which has a plural number of non-aromatic carbon-carbon unsaturated bonds in a molecule, inorganic particles and a hydrophilic binder. An image forming method employing the ink jet recording sheet and a water-base ink is also disclosed.

Ink jet recording sheet and image forming method

An inkjet recording method includes: forming a color image with respective inks on a recording medium by while scanning a recording head multiple times on a same recording area, forming a thinned-out image according to an thinning-out pattern without regularity in each scanning, the recording head having a plurality of nozzle sections for jetting inks, wherein a nozzle pitch thereof is from 10 to 50 &#x3bc;m, the respective inks contain pigments, one organic solvent with high boiling point and water, at least one of the respective inks contains a compound of the general formula (I), a surface tension of the respective inks is from 30 to 50 mN/m, a transferred amount at 0.04 sec of time by Bristow method is 10 ml/mor more, and the recording medium has a micro-porous layer containing inorganic fine particles with a mean particle size of 15 to 100 nm and a hydrophilic binder 

Inkjet recording method and inkjet recording apparatus

An inkjet recording method includes: forming a color image with color inks by while scanning a recording head multiple times on a same recording area, forming a thinned-out image, the recording head having a plurality of nozzle sections for jetting the color inks, wherein a nozzle pitch of the recording head is from 10 to 50 &#x3bc;m, the color inks comprise C, M, Y and BK inks and at least one special color ink, the color inks contain pigments, at least one organic solvent with high boiling point and water, a dot formed by the color inks has a size of 10 to 50 &#x3bc;m, the recording medium has a transferred amount at 0.04 seconds of absorption time, and the recording medium comprises a micro-porous layer containing inorganic fine particles and a hydrophilic binder.

An inkjet recording method includes: generating image data for forming a thinned-out image according to an thinning-out pattern without regularity; and printing a color image with respective inks, by scanning a recording head multiple times on a same recording area and forming the thinned-out image in each scanning, the recording head having a plurality of nozzle sections for jetting inks, wherein the nozzle pitch thereof is from 10 to 50 &#x3bc;m, the respective inks contains pigments, at least one organic solvent with high boiling point and water, a surface tension of the respective inks is from 30 to 50 mN/m, the pigments are dispersed by a polymeric dispersant, a transferred amount at 0.04 sec of time by Bristow method is 10 ml/mor more, and the recording medium has a micro-porous layer containing inorganic fine particles with a mean particle size of 15 to 100 nm and a hydrophilic binder.

An inkjet recording method includes: forming a color image with respective inks on a recording medium by while scanning a recording head multiple times on a same recording area thereof, forming a thinned-out image according to an thinning-out pattern without regularity in each scanning, the recording head having a plurality of nozzle sections for jetting inks, wherein a nozzle pitch thereof is from 10 to 50 &#x3bc;m, the respective inks contains pigments, at least one organic solvent with high boiling point and water, a surface tension of the respective inks is from 30 to 50 mN/m, the yellow ink contains C.I. Pigment Yellow 128 as pigment, a transferred amount at 0.04 sec of time by Bristow method is 10 ml/mor more, and the recording medium has a micro-porous layer containing inorganic fine particles with a mean particle size of 15 to 100 nm and a hydrophilic binder.

An inkjet recording method and apparatus including: forming a color image with color inks and an invisible ink by while scanning a first recording head multiple times on a same recording area, forming a thinned-out image, and jetting an invisible ink from a second recording head in accordance with an adhering amount of the color inks per, wherein a nozzle pitch of the first recording head is from 10 to 50 &#x3bc;m, the color inks comprise C, M, Y and BK inks and at least one special color ink, the color inks contain pigments, at least one organic solvent with high boiling point and water, a dot formed color inks has a size of 10 to 50 &#x3bc;m, and the recording medium has a transferred amount at 0.04 seconds of absorption time of 10 ml/mor more, a micro-porous layer containing inorganic fine particles and a hydrophilic binder.

An inkjet recording method and apparatus includes: forming a color image with color inks and an invisible ink by while scanning a first recording head multiple times on a same recording area of the recording medium, forming a thinned-out image, and jetting an invisible ink from a second recording head in accordance with an adhering amount of the color inks per unit area, wherein a nozzle pitch of the first recording head is from 10 to 50 &#x3bc;m, the color inks contain pigments, organic solvent with high boiling point and water, a dot formed by the color inks has a size of 10 to 50 &#x3bc;m, the recording medium has a transferred amount at 0.04 seconds of absorption time of 10 ml/mor more, a micro-porous layer containing inorganic fine particles and a hydrophilic binder and a 20-degree specular gloss of 20 to 45%.

A dispersion of colored particles is disclosed. The dispersion is prepared by emulsifying a mixture comprising a colorant and polymer, employing a reactive emulsifier, and subsequently copolymerizing the resulting mixture, employing polymerizable monomer. An ink employing the dispersion is also disclosed.

Colored minute particles dispersion, aqueous ink, and image forming method using the same

An ink jet recording medium and its manufacturing method are disclosed, the medium comprising a substrate and provided thereon, plural ink absorption layers including an upper layer containing inorganic pigment and thermoplastic particles, wherein the content by weight of the inorganic pigment is greater than that of the thermoplastic particles.

Ink jet recording medium, its manufacturing method, ink jet image forming method and image formed thereby

An inkjet recording method includes: forming a color image with color inks by while scanning a recording head multiple times on a same recording area, forming a thinned-out image, the recording head having a plurality of nozzle sections for jetting the color inks, wherein a nozzle pitch is from 10 to 50 &#x3bc;m, the color inks comprise C, M, Y and BK inks and at least one special color ink, the color inks contain pigments, at least one organic solvent with high boiling point and water, a dot formed by the color inks has a size of 10 to 50 &#x3bc;m, the recording medium has a transferred amount at 0.04 seconds of absorption time of 10 ml/mor more, the recording medium comprises a micro-porous layer containing inorganic fine particles and a hydrophilic binder; and a 20-degree specular gloss of the recording medium is 20 to 45%.

An ink-jet recording ink is disclosed. The ink contains colored particles each composed for Resin A containing a colorant, or colored particles each comprising a core composed of Resin A containing a colorant and a shell composed of Resin B covering the core, a water miscible solvent and water, and absorption coefficient 'a' of the ink as itself and absorption coefficient 'b' of the ink in which the colorant is dissolved satisfy the relation of 0.50&#x2266;a/b&#x2266;0.95.

Ink for ink-jet recording and image forming method

An ink-jet recording sheet, comprising a support having thereon a porous ink receiving layer, the porous ink receiving layer including inorganic particles, a hydrophilic binder and a polymer, wherein the polymer has a plurality of carbon-carbon unsaturated bonds, provided that the unsaturated bonds are non-aromatic; the polymer has a recurring unit derived from butadiene or isoprene.

Ink-jet recording sheet

Ink-jet image recording method

An image forming method using an ink jet is disclosed. A pigment ink containing a dispersed pigment is jetted onto an ink jet recording medium. The recording medium support having as the outermost layer an ink receptive layer comprising thermoplastic resinous particles and a pigment ink solvent absorptive layer adjacent to said ink receptive layer. The fine thermoplastic particle ink receptive layer is the outermost layer onto which the ink is jetted. Thereafter, the outermost layer containing the jetted ink is transparentized by simultaneous application of heat and pressure to obtain an image.

Growing community of inventors

Hino, Japan

Atsushi Tomotake