Konica-minolta Holdings, Inc.

Takahiro Matsuzawa

Atsushi Tomotake

Miyako Sugihara

Kenzo Nakazawa

Hiroaki Arakawa

An inkjet recording apparatus includes a recording head having three rows of nozzles which are three-phase driven and arranged in a staggered arrangement. The nozzles are arranged in the main scanning direction at an interval of L/3, where L is a pixel pitch, and each nozzle row is ejection-driven in the sequence from the last nozzle row to the forward nozzle row in the moving direction of the recording head. The recording head scans at a moving speed of 2&#xd7;L&#xd7;f, where f is an ejection frequency per nozzle row. After the completion of one scan, the recording medium is moved a distance of predetermined multiples of the pixel pitch in the sub-scanning direction, and in the next scan, ink is ejected onto the recording medium at pixel positions other than the pixel position on which the ink has landed in preceding scans.

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.

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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Hachioji, Japan

Takahiro Matsuzawa