JP2001323196A - Ink set, ink cartridge, ink-jet recording method, print and recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink set, an ink cartridge, and an ink-jet recording method which can afford images having not only high picture quality, high water resistance, and high light-resistance but also high gas resistance, and a print having images with high picture quality and high gas resistance, and a recording apparatus capable of preparing the print. SOLUTION: The ink set and ink cartridge have a cyan ink and are to record on an ink-jet recording medium having a porous ink receiving layer, and the ink-jet recording method and print use the ink set and/or ink cartridge, and the recording apparatus can mount the above ink set and/or ink cartridge, and the cyan ink contains a pigment as the colorant and the colorant of the other ink is a dye.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink set, an ink cartridge, an ink jet recording method, a recorded matter, and a recording apparatus, and more particularly, to high-quality images when recording with an ink jet recording apparatus using a plurality of colorants. Ink set, ink cartridge and ink jet recording method capable of obtaining an image having not only high water resistance and high light resistance but also high gas resistance, and high image quality.
The present invention relates to a recorded matter having not only high water resistance and high light resistance but also high gas resistance, and a recording apparatus for producing such a recorded matter.

[0002]

2. Description of the Related Art As is well known, an ink jet recording method is a printing method in which ink droplets are made to fly and adhere to a recording medium such as paper to perform printing. This printing method enables high-resolution, high-quality images to be printed quickly and easily with an inexpensive device.
Technical development is being carried out as an image forming method that can substitute for photographs.

[0003] The ink used for the ink-jet recording generally contains water as a main component, and further contains a coloring component, a wetting agent such as glycerin for the purpose of preventing clogging, and the like. As the colorant used in the ink for ink jet recording, high image quality such as saturation and color reproducibility of the colorant, a wide variety of available colorants,
Water-soluble dyes are used from the viewpoint of solubility in water and reliability such as clogging.

[0004] As an ink jet recording medium for recording an image using such a water-soluble dye, a recording medium having a porous ink receiving layer on a base material is excellent in quick drying and water resistance and has high image quality. Is known as a recording medium from which is obtained. However, the recorded matter obtained by discharging the water-soluble dye onto an inkjet recording medium having a porous ink receiving layer on a base material has a colorant in the ink because the ink receiving layer is porous. Ozone (O ₃ ), nitrogen oxides (NO _x ), and sulfur oxides (SO _x ) contained in the air by contacting the dye
Discoloration is easily caused by such gases. In particular, among the color dye inks (yellow, magenta, and cyan), some cyan dyes have high gas resistance even though they have high water resistance and high light resistance (CI Direct Blue 86). , 1
99, etc.), the image obtained using such a cyan dye having a copper phthalocyanine skeleton caused deterioration by oxidation and reduction due to the gas, and the hue balance was disturbed. There was a problem of seeing.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide an ink jet recording apparatus having a porous ink receiving layer on a substrate. When recording on a medium, an ink set, an ink cartridge and an ink jet recording method capable of obtaining an image having not only high image quality, high water resistance and high light resistance, but also high gas resistance, and an image having high image quality Another object of the present invention is to provide a recorded matter having high gas resistance and a recording device capable of producing the recorded matter.

[0006]

The present inventors have been studying an ink jet recording method using a color ink. Recently, the present inventors have achieved high image quality by combining a specific pigment ink and a dye ink. The inventors have found that an image having not only high water resistance and high light resistance but also high gas resistance is obtained, and the present invention has been completed.

That is, the ink set according to the present invention is an ink set for recording on an inkjet recording medium having a cyan ink and having a porous ink receiving layer on a substrate, wherein the cyan ink is A pigment is contained as a colorant, and the colorant of the other ink is a dye (claim 1), whereby the object can be achieved.

[0008] In the ink set according to the present invention, it is preferable that the pigment is C.I. I. Pigment Blue 15: 3 (Claim 2), the cyan ink further contains a dye as a colorant (Claim 3), and the cyan ink comprises two shades of cyan ink ( According to claim 4), the above object can be achieved.

[0009] The ink cartridge according to the present invention records a cyan ink and another ink integrally or at least a part thereof independently on an ink jet recording medium having a porous ink receiving layer on a base material. Wherein the cyan ink contains a pigment as a colorant and the colorant of another ink is a dye (claim 5), thereby achieving the object. .

In the ink cartridge according to the present invention, it is preferable that the pigment is C.I. I. Pigment Blue 15: 3 (Claim 6), the cyan ink further contains a dye as a colorant (Claim 7), and the cyan ink comprises two cyan inks of different shades. According to the present invention, the above object can be achieved.

[0011] The ink jet recording method according to the present invention comprises:
When performing color printing on an inkjet recording medium having a porous ink receiving layer on a substrate using a cyan ink and another ink, the cyan ink contains a pigment as a colorant, and the other ink contains An ink set in which the colorant is a dye is used (claim 9), whereby the object can be achieved.

The recorded matter according to the present invention is a recorded matter obtained by color printing using a cyan ink and another ink on an ink jet recording medium having a porous ink receiving layer on a base material. The recording is performed by using an ink set in which the ink contains a pigment as a colorant and the colorant of the other ink is a dye (claim 10), whereby the object can be achieved.

A recording apparatus according to the present invention is configured so that the ink set and / or the ink cartridge can be mounted thereon and that a plurality of types of ink constituting the ink set and / or the ink cartridge can be ejected. According to the present invention, the above object can be achieved.

(Function) The ink set according to the present invention is an ink set for recording on an ink jet recording medium having a cyan ink and having a porous ink receiving layer on a base material. Contains a pigment as a colorant, and the colorant of the other ink is a dye. Ozone (O ₃ ), nitrogen oxides (NO _x ), sulfur oxides (SO _x )
In cyan ink, which is considered to have undergone remarkable fading and discoloration compared to other colors due to such gases,
By containing a pigment as a colorant for cyan ink,
Fading and discoloration can be suppressed. Thereby, when recording on an inkjet recording medium having a porous ink receiving layer on a substrate, not only high image quality, high water resistance, high light resistance, but also an image having high gas resistance An ink set that can be obtained can be obtained (claim 1).

In the ink set according to the present invention, the pigment comprises:
C. I. Pigment Blue 15: 3. C. I. Pigment Blue 15: 3 is a colorant having high water resistance, high light resistance, and high gas resistance. Therefore, particularly, an ink capable of obtaining an image having high water resistance, high light resistance, and high gas resistance. It can be a set (claim 2).

The ink set according to the present invention is characterized in that the cyan ink further contains a dye as a coloring agent. Since the color of the dye received in the ink receiving layer is good, an ink set capable of obtaining a particularly high-quality image can be obtained (claim 3).

The ink set according to the present invention is characterized in that the cyan ink comprises two shades of cyan ink. As a result, a color including cyan can be reliably reproduced, so that a particularly high-definition image can be obtained (claim 4).

The ink cartridge according to the present invention records a cyan ink and another ink integrally or at least a part thereof independently on an ink jet recording medium having a porous ink receiving layer on a base material. In the ink cartridge, the cyan ink contains a pigment as a colorant, and the colorant of another ink is a dye. Ozone (O ₃ ), nitrogen oxides (NO _x ), sulfur oxides (S
In a cyan ink which is considered to have undergone remarkable fading and discoloration compared to other colors due to a gas such as _OX ), fading and discoloration are suppressed by including a pigment as a colorant for the cyan ink in this way. be able to. This allows
When recording on an inkjet recording medium having a porous ink receiving layer on a substrate, it is possible to obtain an image having not only high image quality, high water resistance and high light resistance but also high gas resistance. It is possible to provide an ink cartridge that can be used (claim 5).

In the ink cartridge according to the present invention, the pigment is C.I. I. Pigment Blue 15: 3. C. I. Pigment Blue 15: 3 is a colorant having high water resistance, high light resistance, and high gas resistance. Therefore, particularly, an ink capable of obtaining an image having high water resistance, high light resistance, and high gas resistance. It can be a cartridge (claim 6).

The ink cartridge according to the present invention is characterized in that the cyan ink further contains a dye as a coloring agent. In the dye received in the ink receiving layer,
Since the color development is good, an ink cartridge capable of obtaining a particularly high-quality image can be obtained.

[0021] The ink cartridge according to the present invention is characterized in that the cyan ink comprises two shades of cyan ink. As a result, a color including cyan can be reliably reproduced, so that a particularly high-definition image can be obtained (claim 8).

According to the ink jet recording method of the present invention, when color printing is performed on an ink jet recording medium having a porous ink receiving layer on a substrate using a cyan ink and another ink, the cyan ink is used. A color ink set is used in which the ink contains a pigment as a colorant and the colorant of the other ink is a dye. In a cyan ink which is considered to have undergone remarkable fading or discoloration compared to other colors due to gases such as ozone (O ₃ ), nitrogen oxides (NO _x ), and sulfur oxides (SO _x ), By containing a pigment as a coloring agent for cyan ink, fading and discoloration can be suppressed. Thereby, when recording on the inkjet recording medium having a porous ink receiving layer on the substrate, not only high image quality, high water resistance, high light resistance,
An ink jet recording method capable of obtaining an image having high gas resistance can be provided (claim 9).

The recorded matter according to the present invention is a recorded matter obtained by performing color printing using a cyan ink and another ink on an ink jet recording medium having a porous ink receiving layer on a base material. Recording is performed using an ink set in which the ink contains a pigment as a colorant and the colorant of another ink is a dye. Ozone (O ₃ ), nitrogen oxides (N
O _X), in the cyan ink was considered significantly fade discoloration compared to other colors with a gas such as sulfur oxides (SO _X) is occurring, thus, to contain a pigment as a colorant for cyan ink Thus, fading and discoloration can be suppressed. This is a recorded material that has been color printed using a cyan ink and another ink on an inkjet recording medium having a porous ink receiving layer on a base material,
A recorded matter having not only high image quality, high water resistance and high light resistance but also high gas resistance can be obtained.
0).

A recording apparatus according to the present invention is configured so that the ink set and / or the ink cartridge according to the present invention can be mounted thereon, and can discharge a plurality of types of ink constituting the ink set and / or the ink cartridge. Is configured. Therefore, it is possible to provide a recording apparatus capable of producing a recorded matter having not only high image quality, high water resistance and high light resistance but also high gas resistance.

[0025]

DETAILED DESCRIPTION OF THE INVENTION An ink set according to the present invention is an ink set for recording on an inkjet recording medium having a cyan ink and having a porous ink receiving layer on a base material. The ink contains a pigment as a colorant, and the colorant of another ink is a dye. Further, the ink cartridge according to the present invention records cyan ink and another ink integrally or at least partly independently on an ink jet recording medium having a porous ink receiving layer on a base material. Wherein the cyan ink contains a pigment as a colorant, and the colorant of the other ink is a dye. Next, preferred embodiments of the present invention will be illustrated below, but the present invention is not limited to the following first to eighth embodiments, and within the scope of the matters specifying the invention. It can be changed as appropriate.

The ink set according to the first embodiment of the present invention is an ink set including a cyan ink, a magenta ink, and a yellow ink, wherein the cyan ink contains a pigment as a colorant, and the other inks are colored. An ink set in which the agent is a dye.

An ink set according to a second embodiment of the present invention is an ink set including a cyan ink, a dark magenta ink, a light magenta ink, and a yellow ink, wherein the cyan ink contains a pigment as a colorant, An ink set in which the colorant of another ink is a dye.

The ink set according to the third embodiment of the present invention is an ink set including a dark cyan ink, a light cyan ink, a dark magenta ink, a light magenta ink, and a yellow ink. This is an ink set in which the ink contains a pigment as a colorant, and the colorant of another ink is a dye.

The ink set according to the fourth embodiment of the present invention is an ink set including a dark cyan ink, a light cyan ink, a dark magenta ink, a light magenta ink, a dark yellow ink, and a light yellow ink. This is an ink set in which a cyan ink and a light cyan ink contain a pigment as a coloring agent, and the coloring agent of another ink is a dye.

An ink cartridge according to a fifth embodiment of the present invention is an ink cartridge containing cyan ink, magenta ink, and yellow ink integrally or at least partly independently, wherein cyan ink is used. The ink cartridge contains a pigment as a colorant, and the colorant of another ink is a dye.

A color ink cartridge according to a sixth embodiment of the present invention is an ink cartridge containing cyan ink, dark magenta ink, light magenta ink, and yellow ink integrally or at least partly independently. Wherein the cyan ink contains a pigment as a colorant, and the colorant of the other ink is a dye.

An ink cartridge according to a seventh embodiment of the present invention contains a deep cyan ink, a light cyan ink, a dark magenta ink, a light magenta ink, and a yellow ink integrally or at least partly independently. The dark cyan ink and the light cyan ink contain a pigment as a colorant, and the colorant of the other ink is a dye.

The ink cartridge according to the eighth embodiment of the present invention comprises a dark cyan ink, a light cyan ink, a dark magenta ink, a light magenta ink, a dark yellow ink,
An ink cartridge containing a light yellow ink integrally or at least a part thereof independently, wherein a dark cyan ink and a light cyan ink contain a pigment as a colorant, and a colorant of another ink is a dye. It is an ink cartridge.

In the first to eighth embodiments,
Although no black ink is included, an ink set and an ink cartridge including a black ink using a black dye as a coloring agent can also be used. Further, the ink set and the ink cartridge according to the first to eighth embodiments may include an ink set including a black ink using a black pigment as a colorant.

In the first to eighth embodiments, the ink set and the ink cartridge are configured as a color ink set and a color cartridge of 4 to 6 color sets. However, the present invention is not limited to those configured as a color ink set of 4 to 6 color sets and color cartridges. For example, a cyan ink containing a pigment as a colorant as a color ink set of 2 color sets and a color ink cartridge. And a magenta ink using a dye as a colorant, or a cyan ink containing a pigment as a colorant and a yellow ink using a dye as a colorant.

Next, each ink used in the present invention will be described in more detail. [Cyan Ink] The cyan ink contains one or more of the following pigments as a coloring agent, and thereby can impart not only water resistance and light resistance but also gas resistance to an image. Further, it is preferable to further contain one or more of the following dyes for the purpose of improving the quality of the obtained image. -Specific examples of the pigment include C.I. I. Pigment Blue 15, 15:
1, 15: 2, 15: 3, 16, 18, 25, 60, 6
5, 66 and the like. Among them, C.I. I. Pigment Blue 15: 3 is preferable since it is a colorant having high water resistance, high light resistance and high gas resistance, and an image having high water resistance, high light resistance and high gas resistance can be obtained. -Specific examples of the dye include C.I. I. Direct Blue 1, 10, 15, 22, 25, 55, 67,
68, 71, 76, 77, 78, 80, 84, 86, 8
7, 90, 98, 106, 108, 109, 151, 1
56, 158, 159, 160, 168, 189, 19
2,193,194,199,200,201,20
2, 203, 207, 211, 213, 214, 21
8, 225, 229, 236, 237, 244, 24
8, 249, 251, 252, 264, 270, 28
0, 288, 289, 291, C.I. I. Acid Blue 9, 25, 40, 41, 62, 72, 76, 78, 8
0, 82, 92, 106, 112, 113, 120, 1,
27: 1, 129, 138, 143, 175, 181,
205, 207, 220, 221, 230, 232, 2
47, 258, 260, 264, 271, 277, 27
8, 279, 280, 288, 290, 326 and the like.

The amount of the colorant added to the cyan ink is as follows:
In addition to the gas resistance of the ink, it is appropriately determined within a range in which an image having a good hue can be realized.
Is preferable, and the weight ratio of the pigment to the dye is preferably 100: 0 to 1:99, because an image having high image quality, high water resistance, high light resistance and high gas resistance can be reliably obtained. More preferably, it is 100: 0 to 10:90.

The cyan ink contains at least water in addition to the coloring agent. Further, it preferably contains an organic solvent. The organic solvent is preferably a low-boiling organic solvent, and preferred examples thereof include methanol, ethanol, n-propyl alcohol, iso-
Examples include propyl alcohol, n-butanol, sec-butanol, tert-butanol, iso-butanol, pentanol and the like. Particularly, a monohydric alcohol is preferable.

It is preferable that the cyan ink further contains a wetting agent to prevent clogging of the nozzles of the recording head. Preferred examples of the wetting agent include diethylene glycol, polyethylene glycol, polypropylene glycol, ethylene glycol, propylene glycol, butylene glycol, triethylene glycol,
1,2,6-hexanetriol, thiodiglycol,
Hexylene glycol, glycerin, trimethylolethane, trimethylolpropane, urea, 2-pyrrolidone, 1,3-dimethyl-2-imidaridinone, imidazole, N-methyl-2-pyrrolidone, and the like, and further containing a saccharide Examples of saccharides include monosaccharides, disaccharide oligosaccharides (including trisaccharides and tetrasaccharides).
And polysaccharides, preferably glucose, mannose, fructose, ribose, xylose, arabinose, galactose, aldonic acid, glucitol (sorbitol), maltose, cellobiose, lactose,
Sucrose, trehalose, maltotriose and the like can be mentioned. Here, the polysaccharide means a sugar in a broad sense, and is used to include a substance widely existing in nature such as cellulose. The addition amount of these wetting agents is not particularly limited, but is suitably 0.5 to 40% by weight, preferably 2 to 20% by weight in the ink.

The cyan ink preferably contains a penetrant such as an alkyl ether derivative of a polyhydric alcohol. Specific examples of the alkyl ether derivative of the polyhydric alcohol include one or a mixture of two or more selected from diethylene glycol mono-n-butyl ether, triethylene glycol mono-n-butyl ether, and propylene glycol mono-n-butyl ether. be able to. Triethylene glycol mono-
Preference is given to using n-butyl ether and mixtures containing it. The addition amount of the alkyl ether derivative of these polyhydric alcohols is 0.5 to 20 with respect to the dispersion to be produced.
% By weight, more preferably 3 to 15% by weight.
Range.

Further, since a pigment is used as a coloring agent,
A dispersant or a surfactant for dispersing the pigment is preferably used. As the dispersant, any one which has already been generally used as a dispersant for dispersing a pigment can be used. For example, a polymer compound and a surfactant can be used, and more preferably a high-dispersion agent is used. It is a molecular compound. It is obvious to those skilled in the art that a polymer compound can be preferably used as a dispersant, but it is generally considered that dispersion is obtained when a repulsive force occurs that can repel the attractive force generated between pigment particles. . It is said that the repulsion is caused by a surface potential provided by an electric double layer generated on the surface of the particles, and by steric hindrance caused by an adsorption layer adsorbed on the surface of the particles and spreading from the surface. When these repulsions are greater (dense) and further away from the particle surface, a stable dispersion can be obtained. It is generally said that a more stable dispersion can be obtained with a polymer compound having a molecular weight ranging from thousands to tens of thousands than a surfactant having a molecular weight ranging from tens to hundreds.

Preferred examples of the polymer dispersant include natural polymers, and specific examples thereof include proteins such as glue, gelatin, casein and albumin; natural rubbers such as gum arabic and tragacanth; and savonin. Glucosides, alginic acid and propylene glycol alginate, alginic acid derivatives such as triethanolamine alginate, ammonium alginate and sodium alginate, and cellulose derivatives such as methylcellulose, carboxymethylcellulose, hydroxyethylcellulose and ethylhydroxyethylcellulose.

Preferred examples of the polymer dispersant include synthetic polymers, such as polyvinyl alcohols, polyvinylpyrrolidones, polyacrylic acid, acrylic acid-acrylonitrile copolymer, potassium acrylate-acrylonitrile copolymer, and vinyl acetate. Acrylic resins such as acrylic ester copolymers, acrylic acid-alkyl acrylate copolymers, styrene-acrylic acid copolymers, styrene-methacrylic acid-alkyl acrylate copolymers, styrene-α-methyl Styrene-acrylic resin such as styrene-acrylic acid copolymer, styrene-α-methylstyrene-acrylic acid-acrylic acid alkyl ester copolymer, styrene-maleic acid, styrene-maleic anhydride, vinylnaphthalene-acrylic acid copolymer Polymer, vinyl acetate And a vinyl acetate-fatty acid vinyl ethylene copolymer, a vinyl acetate maleate ester copolymer, and salts thereof.

Among these, a copolymer of a monomer having a hydrophobic group and a monomer having a hydrophilic group and a polymer of a monomer having both a hydrophobic group and a hydrophilic group are particularly preferable. Examples of the above salts include diethylamine, ammonia, ethylamine, triethylamine, propylamine, isopropylamine, dipropylamine, butylamine, isobutylamine, triethanolamine,
Salts with diethanolamine, aminomethylpropanol morpholine and the like can be mentioned. These copolymers preferably have a weight average molecular weight of about 3,000 to 30,000, more preferably about 5,000 to 15,000. The addition amount of these dispersants is not particularly limited, but the weight ratio is preferably 0.06 to 3 with respect to the pigment 1,
More preferably, it is 0.125-3.

Examples of preferred surfactants include:
Anionic surfactants (eg, sodium dodecylbenzenesulfonate, sodium laurate, ammonium salts of polyoxyethylene alkyl ether sulfate, etc.), nonionic surfactants (eg, polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, Polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylphenyl ether, polyoxyethylene alkylamine, polyoxyethylene alkylamide, etc.), and these can be used alone or in combination of two or more.

It is also preferable to use acetylene glycol represented by the following formula (1) to ensure the adjustment of the surface tension of the ink, the adjustment of wettability with the recording medium, and the provision of permeability to the recording medium. Can be.

[0047]

Embedded image

In the above formula (1), R ₁ , R ₂ , R ₃ ,
And the alkyl group having 1 to 6 carbon atoms represented by R ₄ is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group. N and m are 0-3
It is an integer that becomes 0. Preferred examples of the acetylene glycol compound represented by the formula (1) include 2,4,
7,9 tetramethyl-5-decyne-4,7-diol,
3,6-dimethyl-4-octyne-3,6-diol,
And 3,5-dimethyl-1-hexyn-3-ol. In addition, a commercial product can be used as the compound of the formula (1). For example, Surfynol 104, 82, 465, 485 or TG manufactured by Nissin Chemical Co., Ltd. can be used. The addition amount of these acetylene glycol compounds is 0.01 to 1 with respect to the dispersion to be produced.
The content is preferably about 0% by weight, more preferably 0.1 to 5% by weight.

Further, a pH adjuster can be added to the cyan ink for the purpose of further improving the dispersion stability of the colorant. It is preferable to adjust the pH of the cyan ink to a range of 5 to 12, and more preferably to a range of 6 to 10. Specific examples of the pH adjuster include sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, lithium carbonate, sodium phosphate, potassium phosphate, lithium phosphate, and diphosphate. Potassium hydrogen, dipotassium hydrogen phosphate, sodium oxalate, potassium oxalate, lithium oxalate, sodium borate, sodium tetraborate, potassium metal such as potassium hydrogen phthalate, potassium hydrogen tartrate, ammonia, methylamine, ethylamine And amines such as diethylamine, tris (hydroxymethyl) aminomethane hydrochloride, triethanolamine, morpholine and propanolamine.

Further, the cyan ink can contain a viscosity modifier, an antioxidant, an ultraviolet absorber, an antiseptic / antifungal agent and the like.

[Light Cyan Ink] The "light cyan ink" is a plurality of cyan inks having a low reflection density when recorded on a recording medium among a plurality of cyan inks in the same ink set. In this case, it means something other than the one having the highest reflection density. More specifically, the amount of the colorant added to the light cyan ink relative to the total weight of the ink is 50% or less of the cyan ink. In this way, by preparing a light ink different from the above-described cyan ink and making the cyan ink, for example, two dark and light cyan inks in the ink set, it is possible to reliably reproduce the color containing cyan, so that a higher A fine image can be obtained.
In the present embodiment, one or more pigments similar to the pigments that can be used in the above-described cyan ink are contained as a coloring agent. In addition, light cyan ink, as a colorant,
In addition to the above-described pigment, it is preferable that a dye that can be used in the above-described cyan ink is further contained for the purpose of improving the quality of an obtained image. The weight ratio of the pigment to the dye is 100: 0 to 100% because an image having high image quality, high water resistance, high light resistance and high gas resistance can be reliably obtained.
1:99 is preferable, and 100: 0-1 is more preferable.
0:90. In addition, it is preferable that at least water is contained together with the pigment, that an organic solvent is contained, that a dispersant, a penetrant, a wetting agent, and a pH adjuster be added, etc. This is similar to the case of ink.

[Other inks] Other inks use the following dyes as coloring agents. Since the color of the dye received in the ink receiving layer is good, a high quality image can be obtained. In the other color inks, the content of the colorant with respect to the total weight of the ink is 50% or less of the color ink. Other inks preferably contain at least water together with the dye, preferably contain an organic solvent, a surfactant, a penetrant, a wetting agent, a pH adjuster, an antiseptic / antifungal agent, etc. are added. It is similar to the case of the magenta ink described above.

Dyes used in other inks include the following dyes. -As a dye used for magenta ink, for example, C.I.
I. Direct Red 2, 4, 9, 23, 26, 31,
39, 62, 63, 72, 75, 76, 79, 80, 8
1, 83, 84, 89, 92, 95, 111, 173,
184, 207, 211, 212, 214, 218, 2
21, 223, 224, 225, 226, 227, 23
2,233,240,241,242,243,24
7, C.I. I. Acid Red 35, 42, 52, 57,
62, 80, 82, 111, 114, 118, 119,
127, 128, 131, 143, 151, 154, 1
58, 249, 254, 257, 261, 263, 26
6,289,299,301,305,336,33
7, 361, 396, 397, C.I. I. Reactive Red 3, 13, 17, 19, 21, 22, 23, 24,
29, 35, 37, 40, 41, 43, 45, 49, 5
5, C.I. I. Basic Red 12, 13, 14, 1
5, 18, 22, 23, 24, 25, 27, 29, 3,
5, 36, 38, 39, 45, 46 and the like. -As a dye used in the yellow ink, for example, C.I.
I. Direct Yellow 8, 9, 11, 12, 27, 2
8, 29, 33, 35, 39, 41, 44, 50, 5,
3, 58, 59, 68, 86, 87, 93, 95, 9
6, 98, 100, 106, 108, 109, 110,
130, 132, 142, 144, 161, 163,
C. I. Acid Yellow 17, 19, 23, 25, 3
9, 40, 42, 44, 49, 50, 61, 64, 7
6, 79, 110, 127, 135, 143, 151,
159, 169, 174, 190, 195, 196, 1
97, 199, 218, 219, 222, 227, C.I.
I. Reactive Yellow 2, 3, 13, 14, 15,
17, 18, 23, 24, 25, 26, 27, 29, 3
5, 37, 41, 42, C.I. I. Basic Yellow 1, 2, 4, 11, 13, 14, 15, 19, 21, 2
3, 24, 25, 28, 29, 32, 36, 39, 40
And the like. -As a dye used in black ink, for example, C.I.
I. Direct Black 9, 17, 19, 22, 32,
51, 56, 62, 69, 77, 80, 91, 94, 9
7, 108, 112, 113, 114, 117, 11
8, 121, 122, 125, 132, 146, 15
4, 166, 168, 173, 199, C.I. I. Acid Black 7, 24, 29, 48, 52: 1, 172,
C. I. Reactive Black 4, 5, 8, 14, 2
1, 23, 26, 31, 32, 34, C.I. I. Basic Black 8 and the like.

Next, the ink set and the ink jet recording medium used for recording by discharging the ink of the ink cartridge according to the present invention will be described. In recent years, various inkjet recording media capable of obtaining high-quality images have been developed. However, the inkjet recording media used in the present invention is a recording medium that is excellent in quick-drying and water resistance and can provide high-quality images. This is an ink jet recording medium having a porous ink receiving layer (also referred to as a microporous type / void type ink receiving layer) on a base material.

As the microporous ink receiving layer, JP-A-7-232473 and JP-A-7-761.
No. 62, JP-A-10-81054, JP-A-1
Conventionally known ones described in JP-A-193776, JP-A-12-309157 and the like can be used. In general, the microporous ink-receiving layer contains an ink-absorbing pigment, an ink fixing agent, and a binder, and further includes a dye fixing agent (waterproofing agent), a fluorescent whitening agent, and a surfactant, if necessary. , Defoamer, pH
It contains various additives such as a regulator, a fungicide, an ultraviolet absorber and an antioxidant.

As the ink absorbing pigment, at least one known white pigment can be used. For example, light calcium carbonate, heavy calcium carbonate, magnesium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, titanium white, aluminum silicate, diatomaceous earth, calcium silicate,
White inorganic pigments such as magnesium silicate, synthetic amorphous silica, colloidal silica, alumina, colloidal alumina, pseudoboehmite, aluminum hydroxide, lithopone, zeolite, hydrohaloysite, magnesium hydroxide, styrene-based plastic pigment, acrylic-based plastic pigment, Organic pigments such as polyethylene, melamine resin, and urea resin are exemplified.

As the ink fixing agent, a cationic compound is particularly preferable, and a low molecular weight compound having a primary to tertiary amine or a quaternary ammonium base, an oligomer having such a group, or a polymer having such a group can be mentioned. . Specifically, diallyldimethylammonium chloride polymer, diallyldimethylammonium salt polymer such as diallyldimethylammonium chloride-sulfur dioxide copolymer, diallyldimethylammonium chloride-acrylamide copolymer, diallylamine hydrochloride-sulfur dioxide copolymer, diallylmethylamine hydrochloride copolymer, Examples thereof include polyallylamine, polyethyleneimine, polyethyleneimine quaternary ammonium salt compound, (meth) acrylic acid alkylammonium salt polymer, (meth) acrylamidoalkylammonium salt polymer, and ionene containing quaternary ammonium salt. The content of these ink fixing agents is
It is preferably 1% by weight to 30% by weight, more preferably 5% by weight to 10% by weight, based on the total dry weight of the ink receiving layer.

Examples of the binder include starch derivatives such as oxidized starch, etherified starch and phosphorylated ester starch; cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose; casein, gelatin, soy protein,
Polyvinyl alcohol or a derivative thereof; polyvinyl pyrrolidone, a maleic anhydride resin, a conjugated diene-based copolymer latex such as a styrene-butadiene copolymer, a methyl methacrylate-butadiene copolymer; a polymer or a copolymer of an acrylate ester and a methacrylate ester An acrylic polymer latex such as an acrylic polymer such as a polymer;
Vinyl-based polymer latex such as ethylene-vinyl acetate copolymer; or functional group-modified polymer latex with a monomer containing a functional group such as carboxy group of these various polymers; Thermosetting resin such as melamine resin and urea resin Water-based adhesives; acrylic esters such as polymethyl methacrylate; polymers or copolymers of methacrylic esters; synthetic resin-based adhesives such as polyurethane resins, unsaturated polyester resins, vinyl chloride vinyl acetate copolymers, polyvinyl butyral, and alkyd resins Agents and the like. The content of these binders is preferably from 10% by weight to 60% by weight based on the total dry weight of the ink receiving layer.
More preferably, it is in the range of 30% by weight to 50% by weight.

As the base material, there is a sheet shape made of paper or plastic, and either a light-transmitting material or a light-impermeable material can be used. For example, as the paper, natural cellulose fiber is used. And those composed mainly of wood or non-wood pulp raw materials,
As plastic materials, polyester resin, diacetate resin, triacetate resin, acrylic resin, polycarbonate resin, polyvinyl chloride resin,
Examples include a polyimide resin, cellophane, and celluloid. Further, examples of the substrate include resin-coated paper in which a polyolefin resin is laminated on one side or both sides of paper.

As described in detail above, it is considered that gases such as ozone (O ₃ ), nitrogen oxides (NO _x ), and sulfur oxides (SO _x ) cause remarkable fading and discoloration compared to other colors. By containing a pigment as a colorant for the cyan ink in the obtained cyan ink, it is possible to suppress fading and discoloration, thereby making it possible to perform ink jet recording having a porous ink receiving layer on a base material. When recording on a medium, it is possible to provide an ink set and an ink cartridge capable of obtaining an image having not only high image quality, high water resistance and high light resistance but also high gas resistance.

Hereinafter, an ink jet recording method and a recording apparatus according to an embodiment of the present invention will be described. As shown in FIG. 1, the recording apparatus 20 includes a sub-scan feed mechanism, a main scan feed mechanism, and a head drive mechanism. The sub-scanning feed mechanism includes a paper feed motor 23 and a platen 26, and conveys the inkjet recording medium P in the sub-scanning direction by transmitting the rotation of the paper feed motor 23 to the platen 26. The main scanning feed mechanism includes a carriage motor 32, a pulley 38, a drive belt 36 stretched between the carriage motor 32 and the pulley 38,
And a sliding shaft 34 provided in parallel with the sixth shaft.
The slide shaft 34 slidably holds the carriage 31 fixed to the drive belt 36. Carriage motor 32
Is transmitted to the carriage 31 via the drive belt 36, and the carriage 31 reciprocates along the sliding shaft 34 in the axial direction of the platen 26 (main scanning direction). The head drive mechanism drives the print head unit 60 mounted on the carriage 31 to eject ink onto the inkjet recording medium P. The paper feed motor 23, the carriage motor 32, and the print head unit 60
The operation of each mechanism is controlled by the control circuit 40.

The recording device 20 has an operation panel 80. The operation panel 80 is connected to the control circuit 40, and a user can perform various settings of the recording device 20 by using buttons provided on the operation panel 80, and display lamps provided on the operation panel 80. Thus, the processing status of the recording device 20 can be confirmed.

FIG. 2 is a block diagram showing the internal configuration of the control circuit 40. The control circuit 40 includes a CPU 41, a programmable ROM (PROM) 43, a RAM 44,
A character generator (CG) 45 storing a dot matrix such as characters, an I / F dedicated circuit 50, a head drive circuit 52, and a motor drive circuit 54 are provided. The I / F dedicated circuit 50 has a built-in serial interface circuit and a parallel interface circuit, and receives a print signal PS supplied from the computer 90 via the connector 56. The head drive circuit 52 is a circuit for driving the print head unit 60, and the motor drive circuit 54 is a circuit for driving the paper feed motor 23 and the carriage motor 32.

FIG. 3 is a perspective view of the print head unit 60. The print head unit 60 can mount a black ink cartridge 71 and a five-color ink cartridge 72 (hereinafter, also referred to as a color ink cartridge since it is constituted by a plurality of color inks) according to the embodiment of the present invention. It has become. The print head 28 provided below the print head unit 60 has a total of six nozzle rows 61 to 66 corresponding to black ink and color ink. Print head unit 6
At the bottom of the nozzle 0, introduction pipes 73 to 78 are provided to guide the ink from the ink tank to each nozzle row. The introduction tube 73 is a tube for guiding ink from the black ink cartridge. Between the introductions 74 to 78 are tubes for guiding ink from the color ink cartridge.

FIG. 4 is a perspective view of the color ink cartridge 72 according to the embodiment of the present invention. The color ink cartridge 72 includes dark cyan (C), light cyan (LC), dark magenta (M), and light magenta (LM).
, And yellow (Y). Here, the two types of inks, dark cyan (C) and light cyan (LC), are inks containing a pigment as a coloring agent, and the other inks are inks in which the coloring agent is a dye. The light cyan ink is
The ink has substantially the same hue as the dark cyan ink and has a lower density than the dark cyan ink. The same applies to light magenta ink. The light cyan ink and the light magenta ink have larger capacity than the dark cyan ink and the dark magenta ink, respectively. Also, among the five types of ink, the yellow ink has the largest capacity.

FIG. 5 is a sectional view of the print head 28 at the bottom surface.
It is explanatory drawing which shows an example of the arrangement | sequence of the nozzle row 61-66 of a set. Each of the nozzle rows 61 to 66 includes 48 nozzles Nz, and the 48 nozzles Nz are arranged in a row at a constant pitch k.

Each of the nozzle rows 61 to 66 has a corresponding one of the nozzles Nz.
Is provided with a piezo element (drive element) corresponding to.
As is well known, a piezo element is an element utilizing mechanical distortion generated when a voltage is applied to both ends of a crystal.
The piezo element is provided in contact with the ink passage near the nozzle Nz, and the width of the ink passage can be increased or decreased by applying a predetermined voltage to the piezo element. As a result, ink droplets are ejected from the nozzle Nz. Each of the nozzle rows 61 to 66 includes a plurality of nozzles Nz having the same shape. However, by changing the magnitude of the voltage applied to the piezo element and changing the insertion method, the ink ejected from each nozzle Nz is changed. The ejection amount of the droplet can be changed.

The first nozzle row 61 discharges the black ink (K) supplied from the first cartridge 71. The second to sixth nozzle rows 62 to 66 respectively
Dark cyan (C), light cyan (LC), dark magenta (M), light magenta (L)
M) and yellow (Y) inks are ejected.

Although the ink jet recording method and the recording apparatus according to the embodiment of the present invention have been described in detail, the ink jet recording method using a cyan ink and another ink and having a porous ink receiving layer on a base material has been described. When performing color printing on a recording medium, by using a color ink cartridge as described above, that is, using an ink set in which the cyan ink contains a pigment as a colorant and the colorant of the other ink is a dye Ozone (O ₃ ), nitrogen oxides (NO _x ), sulfur oxides (SO _x )
Because it can suppress fading and discoloration due to gases such as
An image having not only high image quality, high water resistance and high light resistance but also high gas resistance can be obtained. The recorded matter according to the present invention is recorded using an ink set in which the cyan ink contains a pigment as a colorant and the colorant of the other ink is a dye, so that high image quality, high water resistance, and high light resistance are achieved. In addition to the recording properties, the recorded matter has high gas resistance.

[0070]

Next, the present invention will be described in detail with reference to examples of the present invention, but the present invention is not limited to these examples.

Example 1 Light cyan ink, dark cyan ink, light magenta ink,
A dark magenta ink and a yellow ink were prepared according to the following composition, and each ink was used as a color ink cartridge IC5.
By refilling with CL05 (manufactured by Seiko Epson Corporation), an ink cartridge of Example 1 consisting of a total of five colors was produced. [Light cyan ink] C.I. I. Pigment Blue 15: 3 1.5% by weight Styrene-acrylic acid copolymer (dispersant) Molecular weight = 7000 4% by weight Diethylene glycol 5% by weight Glycerin 10% by weight Triethylene glycol mono-n-butyl ether 8% by weight Surfynol 465 1 % By weight Potassium hydroxide 0.2% by weight Pure water Remainder All of the above components were added to Minimill 100 (Eiger Machinery Inc.,
Bensenbille IL) and milled at 3000 rpm for 2 hours. The obtained dispersion was filtered through a 5 μm membrane filter to obtain an ink composition containing 1.5% by weight of a pigment. [Other Inks] The following colorants were used in place of the colorants in the light cyan ink. The light magenta ink, the dark magenta ink, and the yellow ink were not added with a dispersant, and all other components were stirred to obtain an ink composition. (The above milling and filtration operations are not performed.) Dark cyan ink: C.I. I. Pigment Blue 15: 3 6.0% by weight ・ Light magenta ink: C.I. I. Direct Red 227 1.5% by weight ・ Dark magenta ink: C.I. I. Direct Red 227 6.0% by weight Yellow ink: C.I. I. Direct Yellow 86 6.0% by weight

Example 2 Light Cyan Ink: C.I. I. Pigment Blue 15: 3 1.2% by weight C.I. I. Direct Blue 199 0.3% by weight ・ Dark cyan ink: C.I. I. Pigment Blue 15: 3 4.8% by weight C.I. I. Direct Blue 199 1.2% by weight Except for the above composition (pigment: dye = 8: 2),
A light cyan ink and a dark cyan ink were prepared by using the same composition as that of the light cyan ink of Example 1, and the ink cartridge of Example 2 was prepared by making the other inks the same as those of Example 1.

Example 3 Light Cyan Ink: C.I. I. Pigment Blue 15: 3 0.8% by weight C.I. I. Direct Blue 199 0.8% by weight ・ Dark cyan ink: C.I. I. Pigment Blue 15: 3 3.0% by weight C.I. I. Direct Blue 199 3.0% by weight Except for the above composition (pigment: dye = 5: 5),
The light cyan ink and the dark cyan ink were prepared by using the same composition as the light magenta ink of Example 1, and the ink cartridge of Example 3 was prepared by using the other inks as in Example 1. .

Example 4 Light Cyan Ink: C.I. I. Pigment Blue 15: 3 0.3% by weight C.I. I. Direct Blue 199 1.2% by weight ・ Dark cyan ink: C.I. I. Pigment Blue 15: 3 1.2% by weight C.I. I. Direct Blue 199 4.8% by weight Except for the above composition (pigment: dye = 2: 8),
By having the same composition as the light cyan ink of Example 1,
A light cyan ink and a dark cyan ink were prepared, and the other inks were the same as in Example 1, thereby producing an ink cartridge of Example 4.

Example 5 In light cyan ink and dark cyan ink, C.I.
I. Direct Blue 199 as C.I. I. An ink cartridge of Example 5 was produced in the same manner as in Example 2 except that Acid Blue 9 was used.

Example 6 In light cyan ink and dark cyan ink, C.I.
I. Direct Blue 199 as C.I. I. An ink cartridge of Example 6 was prepared in the same manner as in Example 3 except that Acid Blue 9 was used.

Example 7 In light cyan ink and dark cyan ink, C.I.
I. Direct Blue 199 as C.I. I. An ink cartridge of Example 7 was prepared in the same manner as in Example 4 except that Acid Blue 9 was used.

Comparative Example 1 Light Cyan Ink: C.I. I. Direct Blue 199 1.5% by weight ・ Dark cyan ink: C.I. I. Direct Blue 199 6.0% by weight Light cyan ink and dark cyan ink were prepared by using the same composition as the light cyan ink of Example 1 except that the above composition was used, and the other inks were also used in Examples. In the same manner as in Example 1, an ink cartridge of Comparative Example 1 was produced.

Comparative Example 2 Light Cyan Ink: C.I. I. Acid Blue 9 1.5% by weight ・ Dark cyan ink: C.I. I. Acid Blue 9 6.0% by weight A light cyan ink and a dark cyan ink were prepared by using the same composition as the light cyan ink of Example 1 except that the above composition was used, and other inks were also used in the Example. In the same manner as in Example 1, an ink cartridge of Comparative Example 2 was prepared.

The above Examples and Comparative Examples were evaluated by the following methods, and the results are shown in Table 1. ◇ Test method (1) Image quality test Using the ink cartridges prepared in the Examples and Comparative Examples and the black ink cartridge IC1BK05 (manufactured by Seiko Epson Corporation), a PM photo paper (Seiko) having a microporous / gap-type ink receiving layer was used. Epson Corporation) inkjet printer PM-800
Image name portrait (sample number 1, image identification symbol N1) of high-definition color digital standard image data (ISO / JIS-SCID) is printed with C (manufactured by Seiko Epson Corporation), and the sharpness of the image is visually observed. did. Visually evaluate image sharpness Vividly reproduced image: A Image is reproduced but dull: B Image is unclear: C

(2) Water resistance test One drop of water was dropped on the printed matter obtained in the above (1) with a dropper, and the bleeding of the image was visually observed. Visually evaluate image bleeding No bleeding: A Little bleeding: B Bleeding: C

(3) Gas resistance test The printed matter obtained in the above (1) was left for 24 hours in a mixed gas atmosphere of 1 ppm of ozone, 1 ppm of nitrogen dioxide (NO ₂ ) and 1 ppm of sulfur dioxide (SO ₂ ). , An accelerated test was performed. The color difference ΔE between the background (gray color) of the portrait image before and after the test and the cyan color is calculated according to JIS-
It was measured by the method specified in Z8730. Criteria Color difference is less than 5: A Color difference is 5 to 10: B Color difference is more than 10: C

(4) Light fastness test The printed matter obtained in the above (1) was subjected to an acceleration test for 100 hours using a xenon fade meter (C135A). The color difference ΔE between the background (gray color) and the cyan color of the portrait image before and after the test was measured by a method specified in JIS-Z8730. Criteria Color difference is less than 5: A Color difference is 5 to 10: B Color difference is more than 10: C

[0084]

[Table 1]

From the above results, the recorded matter printed using the ink cartridges of Examples 1 to 4 in which the cyan ink contains a pigment as a coloring agent has high image quality, water resistance, gas resistance and light resistance. did. In particular, Examples 2, 3, 5,
When the ink cartridges of Nos. 6 and 7 were used, a recorded matter having extremely high image quality and gas resistance could be obtained. On the other hand, recorded matters printed using the ink cartridges of Comparative Examples 1 and 2 in which the cyan ink did not contain a pigment as a coloring agent did not have high water resistance, gas resistance, and light resistance. That is, C.I. I. When the ink cartridge of Comparative Example 1 using only Direct Blue 199 (dye) was used, a recorded matter having low water resistance and light resistance was obtained, and the cyan colorant was changed to C.I. I. When the ink cartridge of Comparative Example 2 using only Acid Blue 9 (dye) was used, a recorded matter having low gas resistance was obtained.

[0086]

According to the ink set of the present invention, fading and discoloration due to gas can be suppressed by including a pigment as a coloring agent for cyan ink.
An ink set for recording on an inkjet recording medium having a porous ink receiving layer on a substrate,
It is possible to provide an ink set that not only has high image quality, high water resistance, and high light resistance but also can obtain an image having high gas resistance (claim 1).

According to the ink set of the present invention, the pigment is C.I. I. Pigment Blue 15: 3, so that an ink set capable of obtaining an image having high water resistance, high light resistance and high gas resistance can be provided (claim 2).

According to the ink set of the present invention, since the cyan ink further contains a dye as a colorant,
In particular, it is possible to provide an ink set capable of obtaining a high-quality image (claim 3).

According to the ink set of the present invention, the cyan ink is composed of two cyan inks of different shades and can reliably reproduce a color containing cyan, so that an ink set capable of obtaining a particularly high-definition image is provided. (Claim 4).

According to the ink cartridge of the present invention, fading and discoloration due to gas can be suppressed by including a pigment as a colorant for the cyan ink, whereby the porous ink receiving layer is formed on the substrate. Provided is an ink cartridge for recording on an ink jet recording medium having high image quality, high water resistance, and high light resistance, as well as an image having high gas resistance. (Claim 5).

According to the ink cartridge of the present invention, the pigment is C.I. I. Pigment Blue 15: 3, so that an ink set capable of obtaining an image having high water resistance, high light resistance and high gas resistance can be provided (claim 6).

According to the ink cartridge of the present invention, since the cyan ink further contains a dye as a coloring agent, it is possible to provide an ink cartridge capable of obtaining a particularly high-quality image.

According to the ink cartridge of the present invention, the cyan ink is composed of two cyan inks of different shades, and can reliably reproduce a color containing cyan, so that an ink cartridge capable of obtaining a particularly high-definition image is provided. (Claim 8).

According to the ink jet recording method of the present invention, when color printing is performed on an ink jet recording medium having a porous ink receiving layer on a base material using a cyan ink and another ink, By using an ink set in which the ink contains a pigment as a colorant and the colorant of the other ink is a dye, it is possible to suppress fading and discoloration due to cyan gas, thereby achieving high image quality, high water resistance, A recording method capable of obtaining an image having not only high light resistance but also high gas resistance can be provided (claim 9).

According to the recorded matter of the present invention, a recorded matter obtained by color printing using a cyan ink and another ink on an ink jet recording medium having a porous ink receiving layer on a substrate. Since the cyan ink contains a pigment as a colorant and is recorded using an ink set in which the colorant of the other ink is a dye, the discoloration due to cyan gas
Discoloration can be suppressed, and a recorded matter having not only high image quality, high water resistance and high light resistance but also high gas resistance can be provided (claim 10).

According to the recording apparatus of the present invention, the ink set and / or the ink cartridge of the present invention can be mounted, and a plurality of types of ink constituting the ink set and / or the ink cartridge can be used. Since it is configured to be capable of discharging, it is possible to provide a recording apparatus capable of producing a recorded matter having not only high image quality, high water resistance and high light resistance but also high gas resistance.
1).

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment according to the present invention.

FIG. 2 is a block diagram illustrating an internal configuration of a recording apparatus.

FIG. 3 is a perspective view of a print head unit provided in the recording apparatus.

FIG. 4 is a perspective view of the ink cartridge.

FIG. 5 is a perspective view of a print head provided in the recording apparatus.

[Explanation of symbols]

 Reference Signs List 20 recording device 23 paper feed motor 26 platen 28 print head 31 carriage 32 carriage motor 34 sliding shaft 36 drive belt 38 pulley 40 control circuit 41 CPU 44 RAM 50 I / F dedicated circuit 52 head drive circuit 54 motor drive circuit 56 connector 60 Print head unit 61-66 Nozzle row 71 Black ink cartridge 72 Color ink cartridge 73-78 Inlet tube 80 Operation panel 90 Computer

Claims (11)

[Claims] 1. An ink set for recording on an inkjet recording medium having a cyan ink and having a porous ink receiving layer on a substrate, wherein the cyan ink contains a pigment as a colorant, An ink set, wherein the colorant of the other ink is a dye. 2. The method according to claim 1, wherein the pigment is C.I. I. Pigment Blue 15: 3. 3. The ink set according to claim 1, wherein the cyan ink further contains a dye as a colorant. 4. The ink set according to claim 1, wherein the cyan ink comprises two cyan inks of different shades. 5. An ink cartridge for accommodating a cyan ink and another ink integrally or at least a part thereof independently, and recording on an inkjet recording medium having a porous ink receiving layer on a base material. An ink cartridge, wherein the cyan ink contains a pigment as a colorant, and the colorant of the other ink is a dye. 6. The pigment according to claim 1, wherein the pigment is C.I. I. 6. The ink cartridge according to claim 5, wherein the ratio is CI Pigment Blue 15: 3. 7. The ink cartridge according to claim 5, wherein the cyan ink further contains a dye as a colorant. 8. The ink cartridge according to claim 5, wherein the cyan ink comprises two cyan inks of different shades. 9. Using a cyan ink and another ink,
When performing color printing on an inkjet recording medium having a porous ink receiving layer on a base material, use an ink set in which a cyan ink contains a pigment as a colorant and a colorant of another ink is a dye. An inkjet recording method characterized by the above-mentioned. 10. A recorded matter obtained by color printing using a cyan ink and another ink on an ink jet recording medium having a porous ink receiving layer on a base material, wherein the cyan ink is a pigment as a colorant. And a recording material characterized by being recorded using an ink set in which the colorant of another ink is a dye. 11. An ink set according to any one of claims 1 to 4 and / or an ink cartridge according to any one of claims 5 to 8 can be mounted thereon, and the ink set and / or A recording apparatus configured to be capable of discharging a plurality of types of inks constituting an ink cartridge.