Konica-Minolta Holdings, Inc.

Miyako Sugihara

Atsushi Tomotake

Takahiro Matsuzawa

Kenzo Nakazawa

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.

Inkjet recording method and inkjet recording apparatus

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 

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%.

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%.

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Hino, Japan

Miyako Sugihara