JP2005186414A - Inkjet recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording medium which is improved in performance of an ink corresponding to plain paper, can stably provide a picture-quality image having a high gloss feeling and image density and prevents the generation of a gloss change. <P>SOLUTION: In the inkjet recording method for recording an image on a recording medium, using an inkjet recording device which can discharge through a recording head an ink corresponding to two or more types of plain papers different in color tone, each ink is discharged in order of lower single color glossiness measured by the measuring method (method A) of the single color glossiness: a wire bar #6 is used to uniformly coat an ink to be measured on the printing recording medium so as to provide a wet coating amount of 6 g/m<SP>2</SP>, and a 75° glossiness of the coated section is measured by JIS-P8142, making the measured value to be a single color glossiness of the ink. The inkjet recording device can be used to coat ink on the recording medium (method B). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ink jet recording method using an ink which has been developed in recent years mainly for the purpose of obtaining high recording quality with plain paper.

  The ink jet recording method is a recording method in which an image is recorded by ejecting ink droplets from an ejection port of a recording head and attaching the ink to a recording medium such as paper. As an ink for ink jet recording, water-based ink containing water as a main component and a water-soluble high-boiling solvent such as glycols for the purpose of preventing drying and preventing clogging of a nozzle together with a colorant such as a dye or pigment. Is common. When such water-based ink is used for ink jet recording on so-called plain paper in which ink jet characteristics are not particularly considered, such as PPC paper, recycled paper, coated paper, art paper, etc., the image density of the recorded image In addition, since the saturation is not sufficiently developed and a phenomenon such as bleeding is caused that significantly deteriorates the image quality, high recording quality cannot be expected. Therefore, when a high recording quality is desired, it is necessary to use a high-grade recording medium called ink jet recording paper that takes into consideration the ink jet characteristics as a recording medium.

However, with the widespread use of inkjet recording methods in recent years, there has been a strong demand for high recording quality of a certain level or higher even with plain paper, against the background of the diversification and sophistication of users. Therefore, the present applicant previously contains a dispersion in which a colorant is included in a polymer so as to be dispersible in water as an ink capable of obtaining high recording quality with plain paper (ink for plain paper). A water-based ink in which 20 to 70% of phenyl groups are contained in the repeating unit is proposed (see Patent Document 1). According to this water-based ink, an image having a low bleed and high color developability can be formed on plain paper having poor ink-jet suitability due to good fixability and color developability of the dispersion on the recording surface.
International Publication No. 03/033602 pamphlet

  The above-mentioned water-based ink (ink for plain paper) proposed previously by the present applicant was developed mainly for obtaining high recording quality with plain paper, but is not limited to plain paper, and is suitable for inkjet recording paper. In contrast, it is possible to output an image with high recording quality that is sufficiently satisfactory. However, in particular, the performance of the above-mentioned plain paper-compatible ink for glossy inkjet recording paper (so-called glossy paper) also has room for improvement, considering the existence of a strong competitor, silver halide photography. . That is, glossy paper is selected as a recording medium in ink-jet recording because it is normally expected to have a high image density with high glossiness. When inkjet recording is performed on conventional glossy paper, the image density, saturation, and glossiness of the recorded image may not appear as expected, and a photo-like inkjet recording can be stably obtained. There was a problem. In addition, an image formed with the above-described ink for plain paper may cause a phenomenon called so-called gloss change in which the glossiness of the portion changes only by lightly rubbing with a finger or the like. It was.

  Accordingly, an object of the present invention is to provide an ink jet recording method capable of improving the performance of the above-mentioned plain paper-compatible ink and stably providing an image with high gloss and high image density that hardly causes gloss change. It is to provide.

  As a result of various studies on ink jet recording using two or more colors of the above-mentioned plain paper-compatible ink according to the applicant's previous application, the present inventors have controlled the ejection order based on the monochromatic glossiness of each ink. As a result, it has been found that gloss change can be effectively prevented and that good photographic image quality can be stably obtained.

The present invention has been made on the basis of the above findings, and uses an ink jet recording apparatus capable of ejecting two or more types of pigment inks having different color tones from a recording head. An ink jet recording method for recording an image on a recording medium using a pigment ink containing a dispersible dispersion in the polymer, wherein the repeating unit of the polymer contains 20 to 70% phenyl groups, The above object is achieved by providing an ink jet recording method characterized in that each of the pigment inks is ejected in the order of the low monochromatic glossiness measured by the following <Method for Measuring Monochromatic Glossiness (Method A)> It is.
<Monochromatic Glossiness Measuring Method (Method A)> The ink to be measured is uniformly applied onto the recording medium using a # 6 wire bar so that the wet coating amount is 6 g / m ^2. The 75 degree glossiness according to JIS-P8142 is measured, and this measured value is defined as the monochromatic glossiness of the ink.

The present invention also uses an inkjet recording apparatus capable of ejecting two or more types of pigment inks having different color tones from a recording head, and the pigment ink contains a colorant as a polymer and is dispersible in water. And an ink jet recording method for recording an image on a recording medium using a pigment ink containing 20 to 70% of phenyl groups in the repeating unit of the polymer. Monochromatic Glossiness Measuring Method (Method B)> An ink jet recording method is provided, which is ejected in order of increasing monochromatic glossiness.
<Monochromatic Glossiness Measuring Method (Method B)> Using the above-described ink jet recording apparatus, selecting an optimum recording mode that the ink jet recording apparatus can adopt for the recording medium, and measuring the object at a recording duty of 50% The ink is uniformly applied on the recording medium, and the 75-degree glossiness according to JIS-P8142 is measured on the applied portion, and this measured value is defined as the monochromatic glossiness of the ink.

  The ink jet recording method of the present invention comprises a so-called plain paper-compatible ink previously proposed by the present applicant (including a dispersion in which a colorant is included in a polymer so that it can be dispersed in water, and a phenyl unit is contained in the repeating unit of the polymer. A water-based ink containing 20 to 70% of a group) is an ink jet recording method particularly suitable, and by effectively ejecting each ink in the order of low monochromatic glossiness, gloss change is effectively prevented, Furthermore, it is possible to realize a photographic image quality with a high image density accompanied by a high glossiness and stably provide a photo-like high-quality ink-jet recorded matter.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of an ink jet recording apparatus (printer) used for carrying out the present invention. The printer 1 winds a recording medium M from a paper stacker 3 by a paper feed roller 2 driven by a paper feed motor (not shown), conveys the recording medium M to a platen 4 position, and performs recording by a recording head 6 mounted on a carriage 5. After the recording, the recording medium M is conveyed in the direction indicated by the arrow Y (sub-scanning direction). The carriage 5 is connected to a timing belt 8 driven by a carriage motor 7, and is guided and supported by two guide rails 9 so as to be reciprocally scanned in the main scanning direction X ₁ or X ₂ orthogonal to the sub-scanning direction Y. Has been. A recording head unit 12 including an ink tank that supplies ink to the recording head 6 is mounted on the carriage 5. This ink tank contains inks of three colors, magenta (M), yellow (Y), and cyan (C). Recording by the recording head 6 (the ink ejection operation) is usually carried out when the carriage 5 to the X ₁ direction to move, but not performed record when moving the X ₂ direction, X ₁ direction and the X switching to bidirectional printing which performs printing in _two directions in both directions can be carried out freely.

  In addition, one end side of the area where the carriage 5 can move is the home position of the recording head 6, and below the recording head 6, in order to prevent ejection recovery and ejection failure of the recording head that has caused ejection failure. A recovery unit 10 to be used is arranged. The recovery unit 10 covers the discharge port forming surface (the surface facing the recording medium M) of the recording head 6 with the cap portion 11 and operates a suction pump (not shown) to increase the viscosity or solidify ink or dust from the discharge port. Such foreign matters and bubbles are forcibly discharged and stored in a waste tank (not shown). Further, the recovery unit 10 is provided with a wiper member made of an elastic material such as rubber, which is used for a cleaning operation for cleaning unnecessary ink or dust adhering to the ejection port forming surface of the recording head 6. (Not shown).

  FIG. 2 is a schematic configuration diagram of a discharge port forming surface of the recording head 6. The recording head 6 includes a recording head 6M that discharges M ink, a recording head 6Y that discharges Y ink, and a recording head 6C that discharges C ink, which are integrated and integrated in the main scanning direction X. This is a multi-head having a so-called vertical integrated structure. In each recording head, a plurality of ink ejection openings Nz are provided in a line at a predetermined pitch along the sub-scanning direction Y to form an ejection opening array, and each ejection opening array is arranged in the main scanning direction X. The print heads are arranged in multiple rows (three rows in the present embodiment) in the main scanning direction X so as not to overlap other ejection port rows.

Then, three recording heads 6M constituting the recording head 6, 6Y, 6C are, 6M to the recording direction X _1, 6Y, a forward recording area of 6C are arranged such that the main scan. Ink tanks for supplying ink to the recording heads are also arranged in this order. The arrangement order of the heads is determined on the basis of the monochromatic glossiness measured by the following <Measurement method of monochromatic glossiness (Method A)> for the three color inks used in this embodiment. The recording heads are arranged so that the main scanning order is from a recording head that ejects ink having a low monochromatic glossiness to a recording head that ejects ink having a higher monochromatic glossiness. That is, in this embodiment, the ink with the lowest monochromatic glossiness is the M ink, the next is the Y ink, and the ink with the highest monochromatic glossiness is the C ink. it was arranged as described above with respect to the recording direction X _1.

<Measurement method of monochromatic glossiness (Method A)>
The ink to be measured is uniformly applied onto the recording medium using a # 6 wire bar so that the wet application amount is 6 g / m ^2, and the 75-degree glossiness according to JIS-P8142 of this applied part is measured. This measured value is defined as the monochromatic glossiness of the ink. Here, the “wet application amount” means the weight of the ink per unit area immediately after the ink is applied (water or solvent contained in the ink is in an undried state). Note that the recording medium used in the method A is the same recording medium as that actually used in the ink jet recording using the ink to be measured, that is, the recording medium for actual printing.

  Each of the recording heads 6M, 6Y, and 6C is basically configured in the same manner as the recording head in this type of inkjet recording apparatus, and the energy action provided in a part of the ink supply path and the ink supply path. And an energy generating means (not shown) for generating droplet formation energy to be applied to the ink in the energy acting portion. In this embodiment, an electro-mechanical conversion element is provided as the energy generating means. An electro-mechanical conversion type recording head is particularly suitable for ink jet recording using pigment ink because it is superior in ejection stability of pigment ink as compared to other types of recording heads. A piezoelectric element is preferably used as the electro-mechanical conversion element. As is well known, a piezo element is an element (piezoelectric element) that transforms electro-mechanical energy at an extremely high speed because its crystal structure is distorted by application of a voltage. By applying a voltage having a predetermined time width to the piezo elements arranged at appropriate positions inside each of the recording heads, the piezo elements are extended for the voltage application time, thereby increasing the volume of the ink supply path. The ink corresponding to the contraction is discharged as a droplet and discharged from the discharge port Nz at high speed.

A recording operation of the printer 1 having the above configuration will be described. When a recording start command is received from a host device (not shown), the carriage 5 waiting at the home position starts to move in the recording direction X ₁ by the rotational drive of the carriage motor 7, and each recording is reached when reaching the recording area. Each color ink is ejected from the heads 6M, 6Y, 6C in accordance with predetermined recording data. For example, when a black image is recorded by mixing all three colors of magenta, yellow, and cyan at a predetermined position in the recording area, first, the recording head 6M reaches the predetermined position and ejects magenta ink. When the recording for one line corresponding to the length of the ejection port array of the recording head 6M is completed, the carriage 5 moves to the home position by the reverse rotation driving of the carriage motor 7, and waits there. In parallel with this, the paper feed roller 2 is rotated by a paper feed motor (not shown), and the recording medium M is conveyed by one line in the sub-scanning direction Y. Then, the carriage 5 starts moving again toward the recording direction X _1, becomes that each color ink is ejected from each recording head relative to a recording area, this time, the dots of the magenta ink in the previous cycle To the formed position, yellow ink is ejected from the recording head 6Y so that the ink dots overlap each other. When the yellow ink ejection operation is completed, the recording medium is conveyed by one line in the sub-scanning direction Y, and the recording operation similar to the above is repeated. At this time, the cyan ink is applied from the recording head 6C so that the ink dot overlaps with the overlapping portion of the ink dot by the magenta ink and the ink dot by the yellow ink formed by the previous two cycles. Discharged.

  As described above, the printer 1 ejects each color ink in the order of low monochromatic glossiness (in this embodiment, in the order of magenta, yellow, and cyan). In forming a mixed color image, the ink dots are superimposed in this order. Will be made. For example, as described above, the black image is formed in the order of M → Y → C, the green image is formed in the order of Y → C, the reddish purple image is formed in the order of M → C, and the red image is formed. Ink is ejected in the order of M → Y, and the ink dots by the respective inks are overlapped.

  As described above, the discharge interval (time lag) of each ink when two or more types of inks having different color tones are mixed on a recording medium to form a mixed color image is preferably 0.2 seconds or more, and more preferably 1 More than a second. If this time lag is less than 0.2 seconds, the next ink may be ejected before the first ejected ink is dried. In this case, the ink is dried in a mixed state. An image with a feeling cannot be obtained. The discharge interval can be adjusted by appropriately adjusting the carriage moving speed and the like.

  As the monochromatic glossiness of the ink used in the ink jet recording method of the present invention, those measured in accordance with the following <Monochromatic glossiness measurement method (Method B)> can also be used.

<Monochromatic Gloss Measurement Method (Method B)>
Optimum that the inkjet recording apparatus actually used in the inkjet recording using the ink to be measured (the same inkjet recording apparatus as the main printing) can be adopted for the recording medium (the same recording medium as the main printing). Selected recording mode, the ink to be measured is uniformly applied onto the recording medium at a recording duty of 50%, the 75 degree glossiness according to JIS-P8142 is measured, and the measured value is used as the ink. Of single color glossiness. Here, “recording duty” refers to the ratio of the actual number of ejections to the maximum number of ejections of ink that can be performed in one scan in one direction of the recording head (X ₁ or X _{2 in the} above embodiment) (% ). For example, in a mode in which one dot is formed by one ejection, the ratio of the number of dots actually formed to the number of pixels that can be recorded in one scanning area corresponds to the recording duty.

  In the above-mentioned method B, the optimum recording mode is selected, for example, by a user via a host computer connected to the ink jet recording apparatus to the printer driver of the ink jet recording apparatus (for example, glossy paper). ) And printing information such as a printing purpose (for example, picture quality) can be input. The printer driver automatically selects the most suitable recording mode (recommended mode) for obtaining high print quality from a plurality of preset recording modes based on the printing information input by the user. The recording operation of the ink jet recording apparatus is controlled according to the recommended mode. In an ink jet recording apparatus having only a single recording mode, the single recording mode is the “optimal recording mode that the ink jet recording apparatus can take on a recording medium”.

  The monochromatic glossiness of each ink measured according to the above-mentioned method B can be used for determining the ejection order of each ink, as in the above-described method A. In the actual printing in which the result of the B method is fed back as the ejection order of each ink, it is preferable to select the same recording mode as the recording mode selected in the B method.

  The ink jet recording method of the present invention contributes to the improvement of the performance of the so-called plain paper compatible ink previously proposed by the applicant. When the plain paper compatible ink is used, the gloss change is prevented and the glossiness is high. In this way, a photographic image quality with a high image density accompanied with the above can be obtained. This ink corresponding to plain paper is a water-based ink containing a dispersion in which a colorant is included in a polymer so as to be dispersible in water, and 20 to 70% of phenyl groups are contained in the repeating unit of the polymer. “The polymer repeating unit contains 20 to 70% phenyl group” means that the molecular weight of the repeating unit is M and the number of phenyl groups contained in the repeating unit is n, the molecular weight of the phenyl group is 77, it means that the calculated value (%) of {(77 × n) / M} × 100 = is in the range of 20 to 70.

  An organic pigment or an inorganic pigment can be used as the colorant constituting the dispersion contained in the ink for plain paper. Moreover, as said polymer which comprises the said dispersion, a polyacrylic acid ester, a styrene-acrylic acid copolymer, a polystyrene, polyester, polyamide, a polyimide, a silicon-containing polymer, a sulfur-containing polymer etc. can be used, for example. In addition to the above dispersion and water, the above-mentioned ink for plain paper has an interface such as an acetylene glycol surfactant, an acetylene alcohol surfactant, and a silicon surfactant for the purpose of improving printing quality and preventing drying. An activator, various organic solvents such as glycols and glycol ethers, a pH adjuster, a dissolution aid, and an antioxidant can be appropriately contained.

  For details of the ink for plain paper, refer to Japanese Patent Application No. 2001-320779 and International Publication No. 03/033602 filed earlier by the present applicant. The ink jet recording method of the present invention is effective for the water-based inks disclosed therein. Moreover, as a commercially available inkjet printer using the above-mentioned ink for plain paper, there is PX-V700 manufactured by Seiko Epson, and the inkjet recording method of the present invention can be carried out using this inkjet printer.

  The recording medium applicable to the present invention is not particularly limited as long as it can be used for normal ink jet recording, but the effect of the present invention (obtaining photographic image quality and preventing gloss change) is clear. Since the case where so-called glossy paper having excellent glossiness is used, the recording medium is preferably glossy paper. In particular, glossy paper whose 75 ° glossiness according to JIS-P8142 of the recording surface is 20% or more is preferable. Such glossy paper is generally configured by coating an ink receiving layer on a substrate made of paper, film, resin-coated paper, or the like, and a porous pigment such as silica is coated on the ink receiving layer. There are a so-called porous type bonded with a binder such as polyvinyl alcohol and a so-called swelling type mainly composed of a water-soluble resin such as polyvinyl alcohol or polyvinyl pyrrolidone. The present invention can be applied to any type of ink receiving layer. . Commercially available glossy paper applicable to the present invention includes, for example, PM photographic paper <Glossy> (trade name, manufactured by Seiko Epson, 75 degree gloss 50%), and image advance (trade name, manufactured by Fuji Photo Film, 75 Glossy 55%), Konica QP (trade name, manufactured by Konica, 75% gloss 47%) Canon Prophoto (trade name, manufactured by Canon, 75% gloss 64%), and the like.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, a various change is possible in the range which does not deviate from the meaning of this invention. For example, the recording head 6 of the printer 1 described above is a so-called vertical integrated multihead, but may be a so-called horizontal integrated multihead 6 'as shown in FIG. Further, the number of recording heads, the arrangement pattern of the ejection ports, and the like are not limited to the above embodiment, and can be changed as appropriate.

  The recording head is not limited to the electro-mechanical conversion type as described above, and may use an electrostatic force generating means such as an electrode, or an electro-thermal conversion element such as a heater (electrical- (Thermal conversion method). The latter electro-thermal conversion method is an ink discharge method in which a gas (bubble) is generated in a liquid by an electro-thermal conversion element, and the liquid is discharged by this force. As a recording head of this method, for example, A bubble jet (registered trademark) head manufactured by Canon Inc. can be mentioned. Further, the recording head is not limited to the cartridge type recording head in which the ink tank is integrally provided in the recording head itself as in the above-described embodiment, and the ink tank disposed separately from the recording head via a tube or the like. Alternatively, a recording head that supplies ink may be used.

  Hereinafter, the present invention will be described more specifically with reference to examples of the present invention and test examples showing the effects of the present invention. However, the present invention is not limited to the examples.

[Example 1]
M, Y, and C water-based pigment inks that are standardly mounted on an Seiko Epson ink jet printer PX-V700 (an ink jet printer equipped with a vertically integrated piezo-driven multihead as shown in FIG. 2) (all of which are described above) Plain paper) using PM photographic paper <Glossy> (trade name, manufactured by Seiko Epson, 75 degree gloss 50%) as a recording medium, and according to the above <Method for measuring monochromatic gloss (Method A)> The monochromatic glossiness of each ink was determined. The monochromatic glossiness of each ink was 59% for M ink, 75% for Y ink, and 80% for C ink. In response to this result, using the PX-V700, each color ink is ejected at the same duty in the order of M → Y → C onto the recording surface of the PM photo paper <glossy>, and the duty is 100%. A composite black solid patch was recorded. The discharge interval of each ink was 4 seconds.

[Example 2]
In Example 1, a solid black solid patch was recorded in the same manner as in Example 1 except that the discharge interval of each ink was set to 60 seconds.

Example 3
In Example 1, a solid black solid patch was recorded in the same manner as in Example 1 except that the discharge interval of each ink was set to 0.5 seconds.

Example 4
Using PX-V700, a recording mode suitable for PM photo paper <glossy> (PM photo paper <glossy> mode) is selected, and a single color of each ink is selected according to the above <Monochromatic Gloss Measurement Method (Method B)> The glossiness was determined. The monochromatic glossiness of each ink was 55% for M ink, 63% for Y ink, and 71% for C ink. In response to this result, using the PX-V700, each color ink is ejected at the same duty in the order of M → Y → C onto the recording surface of the PM photo paper <glossy>, and the duty is 100%. A composite black solid patch was recorded. The discharge interval of each ink was 4 seconds.

Example 5
In Example 4, a composite black solid patch was recorded in the same manner as in Example 4 except that the discharge interval of each ink was set to 60 seconds.

Example 6
In Example 4, a composite black solid patch was recorded in the same manner as in Example 4 except that the discharge interval of each ink was set to 0.5 seconds.

[Comparative Example 1]
Using the above PX-V700, each color ink is ejected at the same duty in the order of C → M → Y on the recording surface of PM photo paper <glossy>, and a 100% duty composite black solid patch is recorded. did. The discharge interval of each ink was 4 seconds.

[Comparative Example 2]
In Comparative Example 1, a solid black solid patch was recorded in the same manner as in Comparative Example 1 except that the discharge interval of each ink was set to 0.5 seconds.

[Comparative Example 3]
Using the above PX-V700, each color ink is ejected at the same duty in the order of C → Y → M on the recording surface of PM photo paper <glossy>, and a 100% duty composite black solid patch is recorded. did. The discharge interval of each ink was 4 seconds.

  The image density, glossiness, and gloss change of each solid black solid patch were evaluated by the following methods. These results are shown in the following [Table 1].

(Image density evaluation method)
Using a Spectrolino SPM-50 manufactured by Gretag Macbeth, the reflection optical density (OD value) of the composite black solid patch was measured under the conditions of a viewing angle of 2 degrees, a light source D50, and no filter. A with a value exceeding .6, B with an OD value in the range of 1.3 to 1.6 (no problem in practical use), and C with an OD value of less than 1.3 (not practical) did.

(Glossiness evaluation method)
About the solid black solid patch, 75 degree glossiness (%) was measured using a gloss meter GM-3D manufactured by Murakami Color Research Laboratory. The larger this value, the better the glossiness of the recorded image.

(Gross change evaluation method)
Using a cotton swab, rub the composite black solid patch at a pressure of 0.5 g / cm ² and a speed of 2 cm / sec., And then visually observe it. Although it was possible to confirm what seemed to be, it was designated as B (no problem in practical use) when it was almost unnoticeable, and C (impractical) as a glossy change that could clearly be confirmed as gross change.

It is the perspective view which showed schematic structure of one Embodiment of the inkjet recording device used for implementation of this invention. FIG. 2 is a schematic configuration diagram of a discharge port forming surface of the recording head shown in FIG. FIG. 3 is a view corresponding to FIG. 2 showing another embodiment of the recording head.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Printer 2 ... Paper feed roller 3 ... Paper stacker 4 ... Platen 5 ... Carriage 6 ... Recording head 6M, 6Y, 6C ... Recording head 7 ... Carriage motor 8 ... Timing belt 9 ... Guide rail 10 ... Recovery unit 11 ... Cap part 12 ... Recording head unit Nz ... Ink ejection port M ... Recording medium

Claims (3)

An ink jet recording apparatus capable of discharging two or more types of pigment inks having different color tones from a recording head, and the pigment ink containing a dispersion in which a colorant is included in a polymer and is dispersible in water; An ink jet recording method for recording an image on a recording medium using a pigment ink containing 20 to 70% of a phenyl group in a repeating unit of
An ink jet recording method, wherein each of the pigment inks is ejected in the descending order of monochromatic gloss measured by the following <Monochromatic Glossiness Measuring Method (Method A)>.
<Monochromatic Glossiness Measuring Method (Method A)> The ink to be measured is uniformly applied onto the recording medium using a # 6 wire bar so that the wet coating amount is 6 g / m ^2. The 75 degree glossiness according to JIS-P8142 is measured, and this measured value is defined as the monochromatic glossiness of the ink. An ink jet recording apparatus capable of discharging two or more types of pigment inks having different color tones from a recording head, and the pigment ink containing a dispersion in which a colorant is included in a polymer and is dispersible in water; An ink jet recording method for recording an image on a recording medium using a pigment ink containing 20 to 70% of a phenyl group in a repeating unit of
An ink jet recording method, wherein each of the pigment inks is ejected in the descending order of the monochromatic glossiness measured by the following <Method for Measuring Monochromatic Glossiness (Method B)>.
<Monochromatic Glossiness Measuring Method (Method B)> Using the above-described ink jet recording apparatus, selecting an optimum recording mode that the ink jet recording apparatus can adopt for the recording medium, and measuring the object at a recording duty of 50% The ink is uniformly applied on the recording medium, and the 75-degree glossiness according to JIS-P8142 is measured on the applied portion, and this measured value is defined as the monochromatic glossiness of the ink. The ink jet recording method according to claim 1 or 2, wherein an ejection interval of the two or more types of the pigment inks ejected so that the ink dots overlap on the recording medium is 0.2 seconds or more.

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