JP2011194727A - Inkjet recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet recording method by which a surface of a recording medium can be uniformly coated with clear ink even when pigment ink applied on the recording medium in advance is dried and a recorded matter excellent in glossiness can be obtained.SOLUTION: In the inkjet recording method by which an image is formed on the recording medium by using the pigment ink and the clear ink, the clear ink is applied onto the recording medium after the pigment ink applied onto the recording medium becomes a dried state. Further the clear ink comprises water, a water-soluble organic solvent, a water-soluble resin and alkanolamine. Content of alkanolamine in the clear ink is 3.0 to 7.0 mass% with respect to total amount of the clear ink.

Description

  The present invention relates to an ink jet recording method.

  Conventionally, when recording is performed on a recording medium with pigment ink, there is a problem that the glossiness of the recorded matter is not sufficient. On the other hand, Patent Document 1 improves the glossiness of a recorded matter by coating the surface by spraying a topcoat liquid (clear ink) onto the recorded matter to which pigment ink has been applied by an inkjet recording method. There are suggestions on how to do this.

JP 2001-039006 A

  However, such a method exhibits a certain image improvement effect when the recording medium is an office recording sheet. However, when a very large recorded matter such as an outdoor poster or a signboard is created, the image is used instead. There was a problem that the quality, particularly the glossiness, was greatly deteriorated. That is, when a very large recorded matter such as an outdoor poster or a signboard is created, recording time is inevitably required, which causes deterioration of glossiness. In other words, when a large recorded material is created by the above method, the surface of the recorded material previously recorded by the pigment ink is dried before the clear ink is applied. Will slow down. As a result, when the clear ink is applied, the surface of the recorded matter cannot be uniformly coated with the clear ink, which causes a large deterioration in glossiness.

  Therefore, in view of the problems of the prior art, the present invention is excellent in glossiness so that the surface can be uniformly coated with clear ink even when the pigment ink previously applied to the recording medium is dry. It is an object of the present invention to provide an ink jet recording method capable of obtaining a recorded matter.

  The above object is achieved by the present invention described below. That is, the present invention is an ink jet recording method in which an image is formed on a recording medium using pigment ink and clear ink, and the clear ink is in a state in which the pigment ink applied to the recording medium is dried. The clear ink is applied to the recording medium later, and the composition of the clear ink contains water, a water-soluble organic solvent, a water-soluble resin, and an alkanolamine, and the content of the alkanolamine in the clear ink is The inkjet recording method is characterized by being 3.0% by mass or more and 7.0% by mass or less based on the total amount.

  Specifically, the phrase “the pigment ink is in a dry state” as defined above means that the recording medium to which the pigment ink is applied is applied for 10 minutes after the pigment ink is applied to the recording medium at room temperature and normal humidity. This means the state left unattended. The normal temperature means 20 degrees plus or minus 15 degrees (5 to 35 degrees), and the normal humidity means 50% plus or minus 20% (30 to 70%).

  According to the present invention, even when the pigment ink previously applied to the recording medium is dry, the clear ink is excellent in permeability, so that the surface can be uniformly coated and glossy. An ink jet recording method capable of obtaining an excellent recorded matter is provided.

It is the perspective view which looked at the recording device in the embodiment of the present invention from the left front. 1 is a longitudinal sectional view of a recording apparatus according to an embodiment of the present invention.

  Hereinafter, the present invention will be described in more detail with reference to preferred embodiments of the present invention. The ink jet recording method of the present invention is characterized in that alkanolamine is contained in the range of 3.0% by mass or more and 7.0% by mass or less in the clear ink for ink jet recording used in combination with the pigment ink. As a result, when the clear ink is applied after the pigment ink is in a dry state, a recorded matter having excellent gloss can be obtained.

<Clear ink>
The clear ink used in the present invention means one that does not contain a color material or substantially does not contain a color material. Therefore, the clear ink used in the present invention has an absorbance in the visible region of 0.1 or less. In the present invention, “absorbance in the visible region is 0.1 or less” means that the absorbance is 0.1 or less over a range of 400 nm to 700 nm when a visible light absorption spectrum is measured using a cell having an optical path length of 1 cm. It points to something.

(Alkanolamine)
As the alkanolamine characterizing the clear ink used in the present invention, any alkanolamine may be used as long as it has at least one amine and one hydroxyl group in the molecule. Among these, at least one compound is preferable among monoethanolamine, diethanolamine, triethanolamine, or tris (hydroxymethyl) aminomethane. If the clear ink containing these alkanolamines is applied after the dried pigment ink, the effect of improving the gloss of the recorded matter can be obtained. The reason for this is not clear, but the present inventors determined that the alkanolamine in the clear ink rewet the pigment ink layer surface that was dried and became hydrophobic, and thereby the resin contained in the clear ink. It is speculated that a uniform coating can be achieved.

  The alkanolamine content is 3.0% by mass or more and 7.0% by mass or less with respect to the total amount of the clear ink in order to improve the glossiness of the recorded matter on the recording medium. More preferably, it is 3.5 mass% or more and 6.0 mass% or less with respect to the clear ink whole quantity. When the content of alkanolamine is less than 3.0% by mass relative to the total amount of the ink, the effect of improving the glossiness of the recorded matter is insufficient, and when the content is more than 7.0% by mass, This is not appropriate because the discharge stability is lowered.

(Water-soluble resin)
The clear ink used in the present invention contains a water-soluble resin. The water-soluble resin is not particularly limited, but is preferably a copolymer obtained by copolymerizing a hydrophobic monomer and a hydrophilic monomer. Known hydrophobic monomers and hydrophilic monomers can be used. Examples of these monomers include styrene, benzyl methacrylate, acrylic acid, and methacrylic acid.

  The water-soluble resin used in the present invention preferably has an acid value in the range of 100 mgKOH / g to 200 mgKOH / g. More preferably, they are 120 mgKOH / g or more and 180 mgKOH / g or less. The content of the water-soluble resin is preferably in the range of 1.0% by mass to 20.0% by mass with respect to the total mass of the clear ink. A more preferable content is in a range of 1.5% by mass or more and 10.0% by mass or less. Furthermore, the water-soluble resin used in the present invention preferably has a weight average molecular weight of 1,000 or more and 30,000 or less.

(Water and water-soluble organic solvents)
The clear ink used in the present invention comprises water and a water-soluble organic solvent. Although it does not specifically limit as a water-soluble organic solvent used in this case, Specifically, the following are mentioned. For example, alkyl alcohols having 1 to 4 carbon atoms such as methyl alcohol and ethyl alcohol; N-methyl-2-pyrrolidone, 2-pyrrolidone and the like. Moreover, it is preferable to use deionized water.

  The amount of the water-soluble organic solvent in the clear ink used in the present invention is 3% by mass or more and 50% by mass or less with respect to the total mass of the clear ink, particularly when the ink is used by being jetted by an ink jet recording method. preferable. In this case, the amount of water in the clear ink is preferably 50% by mass to 95% by mass with respect to the total mass of the clear ink.

<Pigment ink>
(Pigment)
The pigment used in the present invention is not particularly limited, and any known pigment can be used. As the black pigment, it is preferable to use carbon black, and it is preferable to use the color pigment having a color index (CI) number. Since the pigment is insoluble in water, the pigment ink is required to disperse the pigment in water. In the present invention, the method of dispersing the pigment in water is not particularly limited, and the following methods can be used. Specifically, a method of dispersing a pigment using a dispersant (resin dispersion method), a method of introducing a hydrophilic group on the surface of the pigment, and improving the dispersibility of the pigment itself to disperse the pigment (self-dispersion method) ) Etc. can be used.

  Further, when the above-described resin dispersion method is used for the pigment ink, a water-soluble resin can be preferably used as a dispersant. The water-soluble resin is not particularly limited, and any water-soluble resin may be used, and a water-soluble resin that can be used for the above-described clear ink can be suitably used.

(Aqueous medium)
The pigment ink used in the present invention may contain water and a water-soluble organic solvent used for the clear ink described above. In addition, it is preferable that content of the water-soluble organic solvent in the pigment ink used for this invention is 3 to 50 mass% with respect to the total mass of the pigment ink. The amount of water in the pigment ink is preferably 50% by mass or more and 95% by mass or less with respect to the total mass of the pigment ink.

<Inkjet recording apparatus>
The present invention relates to an ink jet recording method. Hereinafter, an example of a recording apparatus that can be used in the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a recording apparatus according to the present invention as viewed from the left front. FIG. 2 is a longitudinal sectional view of the recording apparatus. The recording apparatus according to the present embodiment includes a feeding unit 1, a transport unit 2, a carriage unit 3, a paper discharge unit 4, and a control board 6. In the present embodiment, an ink jet recording apparatus that performs recording by discharging ink from a discharge port of the recording head 5 to a sheet based on image information will be described as an example.

  In FIG. 2, the feeding unit 1 is configured by attaching a pressure plate 8 on which sheets as recording media are stacked, a feeding roller 9 for feeding the sheets, a separation roller 17 for separating the sheets, and the like to the feeding base 7. Has been. The operation of the feeding unit 1 will be described. In the standby state, the pressure plate 8 and the separation roller 17 are released. Next, the pressure plate 8 contacts the feeding roller 9. Thereafter, the sheet is fed toward the conveyance unit 2 by the feeding roller 9. The conveying roller 11 is provided with a plurality of pinch rollers 12 that are driven to rotate. Each pinch roller 12 is brought into pressure contact with the conveying roller 11 by a pinch roller spring, thereby generating a sheet conveying force. The sheet sent to the conveyance unit 2 is nipped between the conveyance roller 11 and the pinch roller 12 and conveyed along the upper surface of the platen 10. The carriage unit 3 includes a carriage 15 that carries the recording head 5 and moves back and forth. The recording head 5 is positioned and fixed to the carriage 15 by a head set lever 16 pivotally supported on the carriage 15. The recording head 5 records the image on the sheet P by ejecting ink from each ejection port by driving a heater (heat generating element) in each ejection port based on the recording data. An ink tank that stores ink to be supplied to the recording head is replaceably attached to the recording head 5. The carriage substrate is also provided with contacts for electrical connection with the recording head 5. The carriage substrate and the control substrate 6 on the apparatus main body side are connected by a flexible substrate for transmitting a head signal to the recording head 5.

  When recording an image in the above configuration, first, the conveyance roller 11 is driven to convey the sheet to the recording row position. Then, the carriage 15 is moved, the recording head 5 is driven based on the recording information in synchronization with the movement of the carriage, and an image is recorded by ejecting ink from the ejection port of the recording head 5. The paper discharge unit 4 is provided with two paper discharge rollers 13 and 14 attached to the platen 10. By rotating each of the paper discharge rollers 13 and 14 in synchronization with the conveyance roller 11, the recorded sheet is discharged out of the apparatus main body.

  Although a thermal jet recording head that discharges ink based on recording data has been described here as an embodiment of the recording head, the recording method that can be used in the recording apparatus of the present invention is not limited to this. Specifically, a recording apparatus equipped with a piezo jet recording head that ejects ink using a piezoelectric element may be used.

  Although the recording apparatus using the recording unit in which the ink tank is replaceably attached to the recording head has been described here, the present invention is not limited thereto. For example, a recording apparatus using a recording unit in which a recording head and an ink tank are integrated and the recording head and the ink tank can be exchanged at the same time may be used.

<Inkjet recording method>
In the ink jet recording method of the present invention, after applying the pigment ink to the recording medium, and after applying the clear ink to the recording medium after the pigment ink is in a dry state, the effect of improving the glossiness of the recorded matter is obtained. can get. The phrase “the pigment ink is in a dry state” as defined in the present invention specifically means that the pigment ink is applied after the pigment ink is applied to the recording medium by the inkjet recording method at room temperature and normal humidity. This means that the recording medium is left for 10 minutes or longer. Here, normal temperature means 20 degrees plus or minus 15 degrees (5 degrees to 35 degrees), and normal humidity means 50% plus or minus 20% (30% to 70%).

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. “Part” and “%” are based on mass unless otherwise specified. The remainder means the remainder obtained by subtracting each component from 100 parts as a whole.

<Example 1>
(Preparation of pigment ink)
A 500 mL eggplant flask equipped with a mechanical stirrer is placed in a tank of an ultrasonic generator, and 5.0 g of a water-soluble resin (an acid value 140 mgKOH / g styrene acrylic acid copolymer) and 120 mL of tetrahydrofuran are contained therein. And stirred well while applying ultrasonic waves. In another container, 5 g of carbon black # 2600 (manufactured by Mitsubishi Chemical) was taken, 120 mL of tetrahydrofuran was added, and the mixture was mixed with a planetary stirrer (manufactured by Kurabo Industries) until the pigment surface was sufficiently wetted with the solvent. Then, it added in said 500 mL eggplant flask, and mixed well with water-soluble resin.

Next, after phase inversion by injecting an alkaline aqueous solution containing KOH so that the neutralization rate of the water-soluble resin becomes 100%, premixing was performed for 60 minutes, and Nanomizer NM2-L200AR (Yoshida Kikai Kogyo Co., Ltd.) For 2 hours. Tetrahydrofuran was distilled off from this dispersion using a rotary evaporator, and the concentration was adjusted to obtain a pigment dispersion having a pigment concentration of 6%. Next, an ink preparation liquid having the following composition was prepared using the obtained pigment dispersion.
・ Pigment dispersion 50 parts ・ 1,2-Hexanediol 5 parts ・ Glycerin 15 parts ・ Acetylenol EH (manufactured by Kawaken Fine Chemicals) 1 part ・ Ion-exchanged water remainder The pH of the ink mixture thus obtained was adjusted with KOH. It was adjusted to 9.5 and passed through a glass filter AP20 (Millipore) to obtain a black pigment ink.

(Preparation of clear ink 1)
A clear ink preparation was prepared with the following composition. Styrene-acrylic acid copolymer (acid value 140 mgKOH / g) was used for the following water-soluble resin.
・ Water-soluble resin (as solid content) 4.0 parts ・ Glycerin 7.5 parts ・ 1,2-hexanediol 7.5 parts ・ Acetylenol EH (manufactured by Kawaken Fine Chemical Co., Ltd.) 1.0 part ・ Tris (hydroxymethyl) Aminomethane 5.0 parts, ion-exchanged water remainder The pH of the clear ink mixture obtained above was adjusted to 9.5 with KOH, and passed through a glass filter AP20 (Millipore) to produce clear ink 1.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the pigment ink obtained above and the clear ink 1 was attached to the ink cartridge of the iPF 5100, and a recorded matter was formed on the recording medium. First, the pigment ink was applied to the recording medium to form a solid image, and then left for 10 minutes, and the clear ink 1 was applied to the entire surface of the recording medium, whereby the recorded matter 1 of Example 1 was obtained. At that time, the room temperature was 23 degrees and the humidity was 40%.

<Example 2>
(Preparation of clear ink 2)
A clear ink preparation was prepared with the following composition. Styrene-acrylic acid copolymer (acid value 140 mgKOH / g) was used for the following water-soluble resin.
-Water-soluble resin (as solid content) 4.0 parts-Glycerol 7.5 parts-1,2-hexanediol 7.5 parts-Acetylenol EH (made by Kawaken Fine Chemical Co., Ltd.) 1.0 part-Triethanolamine 0 parts / ion-exchanged water remainder The pH of the clear ink mixture thus obtained was adjusted to 9.5 with KOH, and passed through a glass filter AP20 (Millipore) to produce clear ink 2.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as that used in Example 1 and the clear ink 2 was attached to the ink cartridge of the iPF 5100, and a recorded matter was formed on the recording medium. First, a solid image was formed by applying pigment ink to the recording medium, and then left for 10 minutes, and the clear ink 2 was applied to the entire surface of the recording medium, whereby the recorded matter 2 of Example 2 was obtained. At that time, the room temperature was 30 degrees and the humidity was 60%.

<Example 3>
(Preparation of clear ink 3)
A clear ink preparation was prepared with the following composition. Styrene-acrylic acid copolymer (acid value 180 mgKOH / g) was used for the following water-soluble resin.
・ Water-soluble resin (as solid content) 2.0 parts ・ Glycerin 15.0 parts ・ 1,2-hexanediol 5.0 parts ・ Acetylenol EH (manufactured by Kawaken Fine Chemicals Co., Ltd.) 1.0 part ・ Diethanolamine 7.0 parts -Ion exchange water remainder The pH of the clear ink mixture thus obtained was adjusted to 9.5 with KOH, and passed through a glass filter AP20 (Millipore) to produce clear ink 3.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as that used in Example 1 and the clear ink 3 was attached to the ink cartridge of the iPF 5100, and a recorded matter was formed on the recording medium. First, after applying a pigment ink to a recording medium to form a solid image, the recording material 3 of Example 3 was obtained by allowing the recording medium to stand for 60 minutes and applying the clear ink 3 to the entire surface of the recording medium. At that time, the room temperature was 10 degrees and the humidity was 35%.

<Example 4>
(Preparation of clear ink 4)
A clear ink preparation was prepared with the following composition. Styrene-acrylic acid copolymer (acid value 210 mgKOH / g) was used for the following water-soluble resin.
・ Water-soluble resin (as solids) 10.0 parts ・ Glycerin 7.5 parts ・ 1,2-hexanediol 7.5 parts ・ Acetylenol EH (manufactured by Kawaken Fine Chemicals Co., Ltd.) 1.0 part ・ Tris (hydroxymethyl) Aminomethane 5.0 parts, ion exchange water remainder The pH of the clear ink mixture thus obtained was adjusted to 9.5 with KOH, and passed through a glass filter AP20 (Millipore) to produce clear ink 4.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as that used in Example 1 and the clear ink 4 was attached to the ink cartridge of the iPF 5100, and a recorded matter was formed on the recording medium. First, pigment ink was applied to the recording medium to form a solid image, and then left for 10 minutes, and the clear ink 4 was applied to the entire surface of the recording medium, whereby the recorded matter 4 of Example 4 was obtained. At that time, the room temperature was 20 degrees and the humidity was 50%.

<Example 5>
(Preparation of clear ink 5)
A clear ink preparation was prepared with the following composition. Styrene-acrylic acid copolymer (acid value 180 mgKOH / g) was used for the following water-soluble resin.
・ Water-soluble resin (as solid content) 0.5 part ・ Glycerin 7.5 part ・ 1,2-hexanediol 7.5 part ・ Acetylenol EH (manufactured by Kawaken Fine Chemical Co., Ltd.) 1.0 part ・ Triethanolamine 0 parts / ion-exchanged water remainder The pH of the clear ink mixture thus obtained was adjusted to 9.5 with KOH, and passed through a glass filter AP20 (Millipore) to produce clear ink 5.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as that used in Example 1 and the clear ink 5 was attached to the ink cartridge of the iPF 5100, and a recorded matter was formed on the recording medium. First, after a pigment ink was applied to a recording medium to form a solid image, the solid image was allowed to stand for 30 minutes, and the clear ink 5 was applied to the entire surface of the recording medium, whereby the recorded matter 5 of Example 5 was obtained. At that time, the room temperature was 23 degrees and the humidity was 50%.

<Comparative Example 1>
(Preparation of comparative clear ink 1)
Comparative clear ink 1 used in Comparative Example 1 was obtained in the same manner as in Example 1 except that tris (hydroxymethyl) aminomethane was not added.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as used in Example 1 and the comparative clear ink 1 was attached to the ink cartridge of iPF 5100, and a recorded matter was formed on the recording medium. First, pigment ink was applied to the recording medium to form a solid image, and then left for 10 minutes, and the comparative clear ink 1 was applied to the entire surface of the recording medium, whereby a recorded product 6 of Comparative Example 1 was obtained. At that time, the room temperature was 23 degrees and the humidity was 40%.

<Comparative example 2>
(Preparation of comparative clear ink 2)
Comparative clear ink 2 used in Comparative Example 2 was obtained in the same manner as Example 1 except that the amount of tris (hydroxymethyl) aminomethane added was changed to 2.5 parts.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as used in Example 1 and the comparative clear ink 2 was attached to the ink cartridge of iPF 5100, and a recorded matter was formed on the recording medium. First, a solid image was formed by applying pigment ink to a recording medium, and then left for 10 minutes, and the comparative clear ink 2 was applied to the entire surface of the recording medium, whereby a recorded matter 7 of Comparative Example 2 was obtained. At that time, the room temperature was 20 degrees and the humidity was 80%.

<Comparative Example 3>
(Preparation of comparative clear ink 3)
A clear ink preparation was prepared with the following composition. For the following water-soluble resin, johnkril 679 (trade name: manufactured by BASF, acid value 200 mgKOH / g), which is a styrene-acrylic acid copolymer, was used.
・ Water-soluble resin (as solids) 5.0 parts ・ Glycerin 7.5 parts ・ 1,2-hexanediol 7.5 parts ・ Acetylenol EH (manufactured by Kawaken Fine Chemicals Co., Ltd.) 1.0 part ・ Diethanolamine 2.5 parts -Ion-exchanged water remainder The clear ink mixture thus obtained was adjusted to pH 9.5 with KOH and passed through a glass filter AP20 (Millipore) to produce comparative clear ink 3.

(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with the same pigment ink as that used in Example 1 and the comparative clear ink 3 was attached to the ink cartridge of iPF 5100, and a recorded matter was formed on the recording medium. First, after applying a pigment ink to a recording medium to form a solid image, the solid image was left for 30 minutes, and the comparative clear ink 3 was applied to the entire surface of the recording medium, whereby a recorded matter 8 of Comparative Example 3 was obtained. At that time, the room temperature was 30 degrees and the humidity was 60%.

<Comparative example 4>
(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with pigment ink and clear ink 1 similar to that used in Example 1 was attached to the ink cartridge of iPF 5100, and a recorded matter was formed on the recording medium. First, a solid image was formed by applying pigment ink to a recording medium, and then left for 10 minutes, and the clear ink 1 was applied to the entire surface of the recording medium, whereby a recorded matter 9 of Comparative Example 4 was obtained. At that time, the room temperature was 2 degrees and the humidity was 60%. In this case, since the room temperature is as low as 2 degrees, the pigment ink previously applied is not in the “pigment ink dried state” defined in the present invention.

<Comparative Example 5>
(Creation of recorded material)
Using LFM-GP101R made of Canon coated paper as a recording medium and Canon iPF5100 as an ink jet printer, recorded matter was prepared by the following method. That is, an ink tank filled with pigment ink and clear ink 1 similar to that used in Example 1 was attached to the ink cartridge of iPF 5100, and a recorded matter was formed on the recording medium. First, a solid image was formed by applying pigment ink to the recording medium, and then left for 10 minutes, and the clear ink 1 was applied to the entire surface of the recording medium, whereby the recorded matter 10 of Comparative Example 5 was obtained. At that time, the room temperature was 10 degrees and the humidity was 80%. In this case, since the humidity is as high as 80%, the previously applied pigment ink is not in the “pigment ink dried state” defined in the present invention.

<Evaluation of recorded materials>
The recorded materials 1 to 10 obtained in Examples 1 to 5 and Comparative Examples 1 to 5 of the present invention were visually observed to evaluate glossiness. ◎ indicates very good glossiness, ○ indicates good glossiness at a level that does not cause a problem in practice, × indicates glossiness that causes a problem in practical use, and xx indicates very poor glossiness. The evaluation results are shown in Table 1.

Claims (4)

An ink jet recording method for forming an image on a recording medium using pigment ink and clear ink,
The clear ink is applied to the recording medium after the pigment ink applied to the recording medium is in a dry state, and the composition of the clear ink is water, a water-soluble organic solvent, a water-soluble resin, and an alkanol. An ink jet recording method comprising an amine, wherein the content of the alkanolamine in the clear ink is 3.0% by mass or more and 7.0% by mass or less based on the total amount of the clear ink.   The inkjet recording method according to claim 1, wherein the alkanolamine is at least one compound selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, and tris (hydroxymethyl) aminomethane.   The ink jet recording method according to claim 1 or 2, wherein an acid value of the water-soluble resin is 100 mgKOH / g or more and 200 mgKOH / g or less.   The inkjet recording method according to any one of claims 1 to 3, wherein a content of the water-soluble resin in the clear ink is 1.0% by mass or more and 20.0% by mass or less with respect to a total amount of the clear ink.

Images