Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
1998-03-30
2001-08-28
Barlow, John (Department: 2853)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
C347S101000, C347S102000, C106S031570, C106S031580
Reexamination Certificate
active
06281917
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a process for the formation of images by using a liquid composition and an ink in combination, and more particularly to a process for the formation of images by applying a liquid composition and a colored ink to a recording medium (for example a plain paper), and especially to a process for the formation of images employing a liquid composition and a colored ink in combination by means of an ink-jet process, thereby forming a color image excellent in the magenta-color formation and water fastness.
2. Related Background Art
The ink-jet recording process has been hitherto generally used for a universal printer, copier and the like because of its various kinds of advantages such as, for example, less noise, a low running cost, the easy miniaturization of the device, the easy coloring and so on. However, when images are formed on a recording medium of so-called plain paper by these recording devices being applied with the ink-jet recording process, there has been a problem in which the resulting printed product shows less water fastness.
To solve the problem and improve the water fastness of the resulting recorded image, there have been proposed processes in which a liquid composition is applied previously onto the recording medium. For example, Japanese Patent Application Laid-Open No. 63-299971 discloses a process in which a liquid composition containing an organic compound having two or more cationic groups per molecule is applied onto a recording medium and then recording is performed with an ink containing an anionic dye. Japanese Patent Application Laid-Open No. 64-9279 discloses a process in which an acidic liquid composition containing succinic acid and the like is applied onto a recording medium, and then recording is performed with an ink containing an anionic dye. Further, Japanese Patent Application Laid-Open No. 64-63185 discloses a process in which a liquid composition which insolubilizes a dye is applied onto a recording medium before recording is performed with an ink.
SUMMARY OF THE INVENTION
However, these processes aim at improving the separation of dye itself on the recording medium to improve the water fastness of recorded images. Therefore, in particular for recording in magenta color, there is often a reduction of coloristic property of the dye itself due to the coagulation of dye molecules and the non-homogeneous distribution of separated dye on the recording paper, so that there is a problem that the recorded images tend to be dark, resulting in a lowered coloristic property of recorded images.
Accordingly, the object of the present invention is to provide a technique through which clear images being printed especially in magenta color, which are excellent in the water fastness and the coloristic property, can be obtained when a plain paper is used as a recording medium, and in particular to a process for the formation of images by using the ink-jet process.
The above object can be achieved by the present invention described below.
According to the present invention, there is provided a process for the formation of an image employing a liquid composition and a colored ink in combination to form a colored image on a recording medium, comprising using at least a magenta ink as the colored ink, wherein said magenta ink provides an image of magenta color, which satisfies all color senses represented by the equations:
{square root over ((a
1
+L *)
2
+L +(b
1
+L *)
2
+L )}≧{square root over ((a
0
+L *)
2
+L +(b
0
+L *)
2
+L )} (I),
40≦L
1
*≦80 (II),
50≦a
1
*≦70 (III), and
−30≦b
1
*≦5 (IV),
where in the formulae (I), (II), (III) and (IV), L
1
*, a
1
*, b
1
*, a
0
* and b
0
* each represent a colorimetric value which is defined in the CIE 1976 (L*a*b*) color space; a
1
* and b
1
* each represent a colorimetric value of the image, which is obtained by using a liquid composition and a colored ink on a test paper having a whiteness of from 78 to 84, in accordance with JIS P 8123, measured by a Hunter Whiteness meter, and a chromaticity of 86≦L*≦93, 3≦a*≦10 and −6≦b*≦1, said chromaticity being defined in the CIE 1976 (L*a*b*) color space; and a
0
* and b
0
* each represent a colorimetric value of the image, which is obtained by using only a colored ink on said test paper.
According to the present invention, there is also provided an ink-jet recording process for the formation of an image employing a liquid composition and a colored ink in combination to form a colored image on a recording medium, comprising using at least a magenta ink as the colored ink, wherein said magenta ink provides an image of magenta color, which satisfies all color senses represented by the equations:
{square root over ((a
1
+L *)
2
+L +(b
1
+L *)
2
+L )}≧{square root over ((a
0
+L *)
2
+L +(b
0
+L *)
2
+L )} (I),
40≦L
1
*≦80 (II),
50≦a
1
*≦70 (III), and
−30≦b
1
*≦5 (IV),
where in the formulae (I), (II), (III) and (IV), L
1
*, a
1
*, b
1
*, a
0
* and b
0
* each represent a colorimetric value which is defined in the CIE 1976 (L*a*b*) color space; a
1
* and b
1
* each represent a colorimetric value of the image, which is obtained by using a liquid composition and a colored ink on a test paper having a whiteness of from 78 to 84, in accordance with JIS P 8123, measured by a Hunter Whitenessmeter, and a chromaticity of 86≦L*≦93, 3≦a*≦10 and −6≦b*≦1, said chromaticity being defined in the CIE 1976 (L*a*b*) color space; and a
0
* and b
0
* each represent a colorimetric value of the image, which is obtained by using only a colored ink on said test paper.
REFERENCES:
patent: 5131910 (1992-07-01), Breault
patent: 5167703 (1992-12-01), Eida et al.
patent: 5262527 (1993-11-01), Gregory et al.
patent: 5425134 (1995-06-01), Ishida
patent: 5451251 (1995-09-01), Mafune et al.
patent: 5549740 (1996-08-01), Takahashi et al.
patent: 5614007 (1997-03-01), Kurabayashi et al.
patent: 5624484 (1997-04-01), Takahashi et al.
patent: 5640187 (1997-06-01), Kashiwazaki et al.
patent: 5700314 (1997-12-01), Kurabayashi et al.
patent: 5728201 (1998-03-01), Saito et al.
patent: 5792249 (1998-08-01), Shirota et al.
patent: 5835116 (1998-11-01), Sato et al.
patent: 5985975 (1999-11-01), Kurabayashi et al.
patent: 6027210 (2000-02-01), Kurabayashi et al.
patent: 6158856 (2000-12-01), Sato et al.
patent: 63-299971 (1988-12-01), None
patent: 64-9279 (1989-01-01), None
patent: 64-63185 (1989-03-01), None
Registry Copyright 2000 ACS, Registry# 218281-60-8, 218281-61-9, 225239-68-9.
Katsuragi Ryuji
Teraoka Hisashi
Yamamoto Mayumi
Barlow John
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Shah Manish S.
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