US7216967B2
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Inkjet recording method and inkjet recording apparatus
Assignee: Konica Minolta Inc
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Filing: 2005-03-25
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Granted: 2007-05-15
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Expires: 2025-03-25
Abstract
Abstract 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 μm, 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 μm, the recording medium has a transferred amount at 0.04 seconds of absorption time of 10 ml/m 2 or 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%.
Inventors
- 👤 Takahiro Matsuzawa
- 👤 Atsushi Tomotake
- 👤 Kenzo Nakazawa
- 👤 Miyako Sugihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K15/102; G06K15/105; G06K15/107
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
198 words
An inkjet recording method comprising the step of: forming a color image with color inks on the recording medium by while scanning a recording head multiple times on a same recording area of the recording medium, 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 the color inks, wherein a nozzle pitch of the recording head is from 10 to 50 μm, the color inks comprise cyan, magenta, yellow and black 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 jetting the color inks from the recording head has a size of 10 to 50 μm on the recording medium, the recording medium has a transferred amount at 0.04 seconds of absorption time by Bristow method of 10 ml/m 2 or more, the recording medium comprises a micro-porous layer containing inorganic fine particles having a mean particle size of 15 to 100 nm and a hydrophilic binder, and a 20-degree specular gloss of the recording medium according to JIS-Z-8741 is 20 to 45%.
Claim 2
Dependent Claim
198 words
An inkjet recording method comprising the step of: forming a color image with color inks on the recording medium by while scanning a recording head multiple times on a same recording area of the recording medium, 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 the color inks, wherein a nozzle pitch of the recording head is from 10 to 50 μm, the color inks comprise cyan, magenta, yellow and black 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 jetting the color inks from the recording head has a size of 10 to 50 μm on the recording medium, the recording medium has a transferred amount at 0.04 seconds of absorption time by Bristow method of 10 ml/m 2 or more, the recording medium comprises a micro-porous layer containing inorganic fine particles having a mean particle size of 15 to 100 nm and a hydrophilic binder, and a 20-degree specular gloss of the recording medium according to JIS-Z-8741 is 20 to 45%.
Claim 3
Dependent Claim
38 words
The method of claim 1 , wherein the special color ink is at least one ink selected from a group consisting of a red ink, an orange ink, an blue ink, a violet ink and a green ink.
Claim 4
Dependent Claim
20 words
The method of claim 1 , wherein a printing acceptable rate of the thinning-out pattern is from 15 to 35%.
Claim 5
Dependent Claim
20 words
The method of claim 1 , wherein a surface tension of the color inks is from 30 to 50 mN/m.
Claim 6
Dependent Claim
19 words
The method of claim 1 , wherein the pigments of the color inks are dispersed by a polymeric dispersant.
Claim 7
Dependent Claim
21 words
The method of claim 1 , wherein the recording medium comprises an absorbable support, on which the micro-porous layer is provided.
Claim 8
Dependent Claim
17 words
The method of claim 1 , wherein the hydrophilic binder is polyvinyl alcohol or a derivative thereof.
Claim 9
Dependent Claim
12 words
The method of claim 1 , wherein the hydrophilic binder is hardened.
Claim 10
Dependent Claim
19 words
The method of claim 1 , wherein a void rate of the micro-porous layer is from 30 to 70%.
Claim 11
Dependent Claim
15 words
The method of claim 1 , wherein the inorganic fine particles contain silica or alumina.
Claim 12
Dependent Claim
22 words
The method of claim 1 , wherein the in organic fine particle has the mean particle size of 20 to 80 nm.
Claim 13
Dependent Claim
16 words
The method of claim 1 , wherein the color inks contain urea or a urea derivative.
Claim 14
Dependent Claim
226 words
An inkjet recording apparatus for forming a color image by jetting color inks on a recording medium, comprising: a recording head having a plurality of nozzle sections to jet the color inks, the nozzle sections being arrayed at a pitch of 10 to 50 μm; a scanning section to make the recording head scan multiple times on one recording area of the recording medium; and a control section to allow the recording head to jet the color inks from the plurality of nozzle sections so that a thinned-out image according to a thinning-out pattern without regularity in each scanning is formed on the recording medium, wherein the color inks comprise cyan, magenta, yellow and black inks and at least one special color ink, the color inks contains pigments, at least one organic solvent with high boiling point and water, a dot formed by jetting the color inks from the recording head has a size of 10 to 50 μm on the recording medium, the recording medium has a transferred amount at 0.04 seconds of absorption time by Bristow method is 10 ml/m 2 or more, the recording medium has a micro-porous layer containing inorganic fine particles having a mean particle size of 15 to 100 nm and a hydrophilic binder, and a 20-degree specular gloss of the recording medium according to JIS-Z-8741 is 20 to 45%.
Claim 15
Dependent Claim
226 words
An inkjet recording apparatus for forming a color image by jetting color inks on a recording medium, comprising: a recording head having a plurality of nozzle sections to jet the color inks, the nozzle sections being arrayed at a pitch of 10 to 50 μm; a scanning section to make the recording head scan multiple times on one recording area of the recording medium; and a control section to allow the recording head to jet the color inks from the plurality of nozzle sections so that a thinned-out image according to a thinning-out pattern without regularity in each scanning is formed on the recording medium, wherein the color inks comprise cyan, magenta, yellow and black inks and at least one special color ink, the color inks contains pigments, at least one organic solvent with high boiling point and water, a dot formed by jetting the color inks from the recording head has a size of 10 to 50 μm on the recording medium, the recording medium has a transferred amount at 0.04 seconds of absorption time by Bristow method is 10 ml/m 2 or more, the recording medium has a micro-porous layer containing inorganic fine particles having a mean particle size of 15 to 100 nm and a hydrophilic binder, and a 20-degree specular gloss of the recording medium according to JIS-Z-8741 is 20 to 45%.
Claim 16
Dependent Claim
38 words
The apparatus of claim 13 , wherein the special color ink is at least one ink selected from a group consisting of a red ink, an orange ink, an blue ink, a violet ink and a green ink.
Claim 17
Dependent Claim
20 words
The apparatus of claim 13 , wherein a printing acceptable rate of the thinning-out pattern is from 15 to 35%.
Claim 18
Dependent Claim
20 words
The apparatus of claim 13 , wherein a surface tension of the color inks is from 30 to 50 mN/m.
Claim 19
Dependent Claim
19 words
The apparatus of claim 13 , wherein the pigments of the color inks are dispersed by a polymeric dispersant.
Claim 20
Dependent Claim
21 words
The apparatus of claim 13 , wherein the recording medium comprises an absorbable support, on which the micro-porous layer is provided.
Claim 21
Dependent Claim
17 words
The apparatus of claim 13 , wherein the hydrophilic binder is polyvinyl alcohol or a derivative thereof.
Claim 22
Dependent Claim
12 words
The apparatus of claim 13 , wherein the hydrophilic binder is hardened.
Claim 23
Dependent Claim
19 words
The apparatus of claim 13 , wherein a void rate of the micro-porous layer is from 30 to 70%.
Claim 24
Dependent Claim
15 words
The apparatus of claim 13 , wherein the inorganic fine particles contain silica or alumina.
Claim 25
Dependent Claim
21 words
The apparatus of claim 13 , wherein the inorganic fine particle has the mean particle size of 20 to 80 nm.
Claim 26
Dependent Claim
16 words
The apparatus of claim 13 , wherein the color inks contain urea or a urea derivative.
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