JP2021134313A - Composition set, inkjet recording method, and aqueous pigment inkjet ink composition - Google Patents

Abstract

To achieve both color development property and light resistance in an image formed using an aqueous pigment inkjet ink composition using an organic fluorescent pigment.SOLUTION: A composition set contains an aqueous pigment inkjet ink composition and a treatment liquid composition. The treatment liquid composition contains a cation component, the aqueous pigment inkjet ink composition contains an organic fluorescent pigment and resin particles, the organic fluorescent pigment has no aggregation property due to the cation component, the resin particles have aggregation property due to the cation component, and a content of the organic fluorescent pigment is 3.0 mass% or more with respect to the total amount of the aqueous pigment inkjet ink composition.SELECTED DRAWING: None

Description

The present invention relates to a resin for binding fibers and a method for producing a fiber molded product.

Various water-based pigment inkjet ink compositions have been used to record images by the inkjet method. Generally, water-based pigment inkjet ink compositions contain a coloring material in order to obtain an image of a desired color.

In recent years, there has been an increasing need for printing fluorescent colors by digital printing in order to support a wide variety of designs in sportswear and the like. Dyes have been commonly used in inkjet printing fluorescent inks. As the pigment, for example, Patent Document 1 discloses a fluorescent pigment containing a vinyl copolymer dyed with a fluorescent dye. Further, Patent Document 2 discloses fluorescent resin fine particles composed of resin particles containing an organic fluorescent substance and having an average particle diameter of 90 nm or less.

Japanese Unexamined Patent Publication No. 2009-161688 Japanese Unexamined Patent Publication No. 2001-226595

The fluorescent pigment described in the above patent document is a dye in which the dye is made into a pigment-like property by a resin. Therefore, the color development performance per unit volume is lower than that of dyes and pigments. Further, as in the case of the particles described in Patent Document 2, if the particle size is made too small, the specific surface area becomes large, which may cause a decrease in light resistance due to the properties of the dye. Further, if the particle size is reduced, the dispersion stability of the particles is improved, but the particles sink into the inside of a recording medium such as a cloth, and the abundance near the surface tends to decrease, which may result in insufficient color development. rice field.

On the other hand, according to the studies by the inventors, it has been found that the light resistance of the organic fluorescent pigment is lowered by the low smoothness of the surface of the coating film and the large surface area. Further, it has been found that such smoothness depends not only on the organic fluorescent pigment itself but also on the cohesiveness of the substances blended together.

Therefore, it is required to achieve both color development and light resistance in an image formed by using an aqueous pigment inkjet ink composition using an organic fluorescent pigment.

One aspect of the composition set according to the present invention is
A composition set containing a water-based pigment inkjet ink composition and a treatment liquid composition.
The treatment liquid composition contains a cationic component and contains
The water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles.
The organic fluorescent pigment does not have cohesiveness due to the cationic component,
The resin particles have cohesiveness due to the cation component and
The content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

One aspect of the inkjet recording method according to the present invention is
A treatment liquid attachment step of attaching a treatment liquid composition containing a cation component to a recording medium, and
An ink adhesion step of adhering a water-based pigment inkjet ink composition containing an organic fluorescent pigment and resin particles to a region of the recording medium to which the treatment liquid composition is adhered.
With
The treatment liquid composition contains a cationic component and contains
The organic fluorescent pigment does not have cohesiveness due to the cationic component,
The resin particles have cohesiveness due to the cation component and
The content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

One aspect of the water-based pigment inkjet ink composition according to the present invention is
Water-based pigment inkjet ink composition
The water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles.
The organic fluorescent pigment does not have cohesiveness due to the cation component used together with the water-based pigment inkjet ink composition.
The resin particles have cohesiveness due to the cation component and
The content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

An embodiment of the present invention will be described below. The embodiments described below describe examples of the present invention. The present invention is not limited to the following embodiments, and includes various modifications implemented without changing the gist of the present invention. Not all of the configurations described below are essential configurations of the present invention.

1. 1. Composition Set The composition set of the present embodiment includes a water-based pigment inkjet ink composition and a treatment liquid composition.

1.1. Water-based Pigment Inkjet Ink Composition The water-based pigment inkjet ink composition included in the composition set of the present embodiment contains at least an organic fluorescent pigment and resin particles.

1.1.1. Organic Fluorescent Pigments Water-based pigments Inkjet ink compositions contain organic fluorescent pigments. Examples of the organic fluorescent pigment include resin particles dyed with a dye, resin particles impregnated with an oil-soluble dye, resin particles obtained by emulsion polymerization in the presence of a dye, bulk polymerization and the like. Examples thereof include resin particles obtained by crushing a resin. That is, the organic fluorescent pigment preferably contains a fluorescent dye and a resin integrally.

The organic fluorescent pigment used in the aqueous pigment inkjet ink composition of the present embodiment is a daylight fluorescent pigment, but the type thereof is not particularly limited, and the type, color, etc. of the fluorescent dye contained in the organic fluorescent pigment are also limited. , Not limited.

Commercially available organic fluorescent pigments include, for example, SF-3017N, SF-5017, SF-8017, SW-117 (all manufactured by Shinroihi, trade name), NKW-3200E, NKW-3900E (DC Co., Ltd.). Company-made, product name) and the like. In addition, these commercially available products may be mixed and classified to adjust the particle size distribution.

The volume average particle size (D50P) of the organic fluorescent pigment is not particularly limited. However, the volume average particle size (D50) of the organic fluorescent pigment is preferably 5.0 nm or more and 1000.0 nm or less, more preferably 30.0 nm or more and 700.0 nm or less, and further preferably 50.0 nm or more and 150.0 nm or less. When the volume average particle size (D50P) of the organic fluorescent pigment is at least the above lower limit, the color development property and light resistance can be improved, and when it is at least the above upper limit, the dispersion stability tends to be better. It is also preferable in some respects.

The volume average particle size of the organic fluorescent pigment can be measured by a particle size distribution measuring device based on the laser diffraction / scattering method. Examples of the particle size distribution measuring device include a particle size distribution meter (for example, NanotracWaveII-EX150 manufactured by Microtrack Bell Co., Ltd.) based on a dynamic light scattering method.

The content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition. When the content of the organic fluorescent pigment is 3.0% by mass or more, good color development can be exhibited. Further, if the content of the organic fluorescent pigment is 5.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition, an image having further excellent color development can be formed.

The content of the organic fluorescent pigment is preferably 3.0% by mass or more and 12.0% by mass or less, more preferably 4.0% by mass or more and 11.0 with respect to the total amount of the water-based pigment inkjet ink composition. It is mass% or less, more preferably 5.0 mass% or more and 10.0 mass% or less. When the content of the organic fluorescent pigment is in such a range, good color development can be obtained while maintaining good storage stability.

Further, the organic fluorescent pigment does not have cohesiveness due to the cationic component contained in the treatment liquid composition described later.

Here, the presence or absence of cohesiveness of the organic fluorescent pigment is defined as follows. In a glass bottle having a capacity of 30 cc, 15 cc of an aqueous solution containing 2% by mass of the cationic component used in the treatment liquid composition described later is placed, and the organic fluorescent pigment dispersion liquid is dropped therein with a dropper. Then, when dropped, the aqueous dispersion of the organic fluorescent pigment solidifies, separates from the aqueous solution of the cationic component, and floats on the water surface or sinks to the bottom of the bottle, which is considered to be cohesive. On the other hand, when the organic fluorescent pigment dispersion is dropped with a dropper, the one that does not clearly separate in the aqueous solution of the cationic component and dissolves, diffuses or becomes turbid as a whole is defined as having no cohesiveness. When the behavior when the droplet is dropped cannot be clearly determined by the solid content concentration of the organic fluorescent pigment, it is determined by the behavior when the droplet having the solid content concentration of 30% by mass of the organic fluorescent pigment is dropped.

Since the organic fluorescent pigment does not have cohesiveness due to the cation component, if the following resin particles are not contained in the water-based pigment inkjet ink composition, it will sink into the recording medium or will not be fixed to the recording medium. It will be enough. However, in the present embodiment, the following resin particles are contained in the water-based pigment inkjet ink composition. Since the resin particles have a cohesive property due to the cation component, the organic fluorescent pigment is subjected to an action such that the organic fluorescent pigment is coated with the agglutination of the resin particles. Since this action is one factor, the organic fluorescent pigment is less likely to sink into the recording medium, and the resin particles can be fixed by the film-forming action and the coating film surface can be flattened. Further, since the organic fluorescent pigment does not have cohesiveness due to the cationic component, the reactivity of the ink composition as a whole with the cationic component becomes appropriate, and the surface of the coating film can be made smooth. .. As a result, the surface area of the coating film is reduced due to the less unevenness of the surface, the amount of light exposed to the organic fluorescent pigment existing near the surface of the coating film is reduced, and the light resistance of the recorded image is improved. can.

1.1.2. Resin Particles The water-based pigment inkjet ink composition contains resin particles. The resin particles have cohesiveness due to the cationic component contained in the treatment liquid composition described later.

Here, the presence or absence of cohesiveness of the resin particles is defined in the same manner as the cohesiveness of the organic fluorescent pigment. That is, 15 cc of an aqueous solution containing 2% by mass of the cationic component used in the treatment liquid composition described later is placed in a glass bottle having a capacity of 30 cc, and the resin particle dispersion liquid is dropped therein with a dropper. Then, when the resin particles are dropped, the aqueous dispersion of the resin particles solidifies, separates from the aqueous solution of the cationic component, and floats on the water surface or sinks to the bottom of the bottle, which is considered to be cohesive. On the other hand, when the resin particle dispersion liquid is dropped with a dropper, the one that does not clearly separate in the aqueous solution of the cation component and dissolves, diffuses or becomes turbid as a whole is defined as having no cohesiveness. If the behavior when the droplets are dropped cannot be clearly determined by the solid content concentration of the resin particles, the behavior when the droplets having a solid content concentration of 30% by mass of the resin particles are dropped is determined.

The resin particles may be anionic or cationic, but the organic fluorescent pigment is often anionic, and from such a viewpoint and from the viewpoint that aggregation due to the cationic component can be easily obtained. It is more preferably anionic. When both the organic fluorescent pigment and the resin particles are anionic, an electrostatic repulsion action may be obtained and the dispersion stability may be further improved. The particles of the anionic particle dispersion refer to particles having a negative zeta potential at pH 6.

The resin particles have a function of improving the dispersion stability of the organic fluorescent pigment in the water-based pigment inkjet ink composition, and the organic fluorescent pigment coexisting in the water-based pigment inkjet ink composition is adhered to a recording medium having ink permeability such as cloth. At that time, it has a function of keeping the organic fluorescent pigment on the surface of the recording medium, a function of improving the smoothness of the surface of the coating film formed by the water-based pigment inkjet ink composition, and the like. By suppressing the organic fluorescent pigment from sinking into the recording medium, it is possible to improve the color development on the surface of the recording medium when it becomes a recording material (printed product). Further, the light resistance of the organic fluorescent pigment can be improved by increasing the smoothness of the surface of the coating film formed by the water-based pigment inkjet ink composition.

Each of the above-mentioned functions of the resin particles changes depending on the blending amount, the abundance ratio with the organic fluorescent pigment, and the like. For example, the function of retaining the organic fluorescent pigment on the surface of the recording medium is strongly related to the blending amount of the resin particles. That is, if the blending amount of the resin particles is small, the organic fluorescent pigment tends to be unable to be sufficiently coated, and the uncoated organic fluorescent pigment tends to sink into the recording medium. On the contrary, when the blending amount of the resin particles is large, the organic fluorescent pigment also tends to agglomerate, and the organic fluorescent pigment agglomerates, which tends to cause color unevenness in the image.

Further, for example, the function of enhancing the smoothness of the surface of the coating film is strongly related to the abundance ratio of the resin particles and the organic fluorescent pigment. That is, when the ratio (B / A) of the content B of the resin particles to the content A of the organic fluorescent pigment is large, the cohesiveness of the entire ink composition tends to be large, and the agglomerates tend to be large, and the coating film surface. The smoothness of the On the contrary, when the cohesiveness of the resin particles is small or the ratio (B / A) is small, the agglomerates tend to be small and the smoothness of the coating film surface is high.

As described above, each of the above-mentioned functions of the resin particles correlates with the type of the resin particles, the blending amount, the magnitude of the cohesiveness, the abundance ratio with the organic fluorescent pigment, etc., and has an optimum point or a trade-off relationship. To do.

As a result of various studies, the inventors have obtained an image having good color development and light resistance with respect to the ratio (B / A) of the content B of the resin particles to the content A of the organic fluorescent pigment in the water-based pigment inkjet ink composition. The ratio (B / A) value is preferably 0.3 or more and 5.0 or less, more preferably 0.5 or more and 3.0 or less, and 0.5. It has been found that 2.0 or less is more preferable. When the ratio (B / A) is in such a range, both the wrapping of the organic fluorescent pigment by the resin particles and the smoothing of the coating film by the resin particles are good, and further excellent in color development and light resistance. Images can be formed.

The glass transition temperature of the resin particles is not particularly limited, but it is preferable to have a low glass transition temperature from the viewpoint of improving the film-forming property. The glass transition temperature of the resin particles is preferably 10.0 ° C. or lower, more preferably 0.0 ° C. or lower, still more preferably −10 ° C. or lower, and particularly preferably −20 ° C. or lower. When the glass transition temperature of the resin particles is low, the film-forming property is more excellent, so that an image having better light resistance can be formed.

The method for measuring the glass transition temperature (Tg) is not particularly limited. As the glass transition temperature (Tg) in the present specification, a value measured by a thermal analysis method such as a DSC curve can be adopted based on JIS K 7121.

Examples of commercially available resin particles include Takelac W-605, W635, WS-6021, W6010, W-6020, W-6110 (manufactured by Mitsui Chemicals, Inc., trade name), Superflex 420, 460, 470, 610. , 620, 650, 700, 740, 800 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., trade name), Movinyl 952A (manufactured by Nippon Synthetic Chemicals Co., Ltd., trade name) and the like. Examples of resins having a glass transition temperature of 0 ° C. or lower include Superflex 420, 460, 470, 650, 740 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., trade name), Takelac (registered trademark) W-605, W-635. , WS-6021 (manufactured by Mitsui Chemicals, Inc., trade name) and the like.

The volume average particle diameter (D50) of the resin particles is preferably 10.0 nm or more and 1000.0 nm or less, more preferably 30.0 nm or more and 700.0 nm or less, and further preferably 70.0 nm or more and 300.0 nm or less.

The volume average particle diameter of the resin particles can be measured by a particle size distribution measuring device based on the laser diffraction / scattering method. Examples of the particle size distribution measuring device include a particle size distribution meter (for example, NanotracWaveII-EX150 manufactured by Microtrack Bell Co., Ltd.) based on a dynamic light scattering method.

The content of the resin particles is preferably 2.0% by mass or more and 20.0% by mass or less, and more preferably 5.0% by mass or more and 15.0% by mass or less with respect to the total amount of the composition. Within such a content range, storage stability, smoothness of the coating film, and color development can be improved.

11.3. Other Components The water-based pigment inkjet ink composition may contain the following components.

(1) Water The water-based pigment inkjet ink composition according to the present embodiment contains water. The aqueous system is a composition containing water as one of the main solvent components. Water may be contained as a main solvent component, and is a component that evaporates and scatters due to drying. The water is preferably water from which ionic impurities such as pure water or ultrapure water such as ion-exchanged water, ultra-filtered water, reverse osmosis water, and distilled water have been removed as much as possible. Further, it is preferable to use water sterilized by ultraviolet irradiation or addition of hydrogen peroxide because the growth of mold and bacteria can be suppressed when the water-based pigment inkjet ink composition is stored for a long period of time. The water content is preferably 40% by mass or more, more preferably 50% by mass or more and 98% by mass or less, and further preferably 55% by mass or more and 95% by mass or less with respect to the total amount of the water-based pigment inkjet ink composition. Is.

(2) Water-soluble organic solvent The water-based pigment inkjet ink composition of the present embodiment may contain a water-soluble organic solvent. One of the functions of the water-soluble organic solvent is to improve the wettability of the water-based pigment inkjet ink composition with respect to the recording medium, and to enhance the moisturizing property of the water-based pigment inkjet ink composition. Examples of the water-soluble organic solvent include esters, alkylene glycol ethers, cyclic esters, nitrogen-containing solvents, polyhydric alcohols and the like. Examples of the nitrogen-containing solvent include cyclic amides and acyclic amides. Examples of the acyclic amides include alkoxyalkyl amides.

Examples of esters include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, and diethylene glycol monobutyl ether acetate.
Glycol monoacetates such as propylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, methoxybutyl acetate, etc., ethylene glycol diacetate, diethylene glycol diacetate, propylene glycol diacetate, dipropylene glycol diacetate, ethylene glycol acetate propionate , Ethylene glycol acetate butyrate, diethylene glycol acetate butyrate, diethylene glycol acetate propionate, diethylene glycol acetate butyrate, propylene glycol acetate propionate, propylene glycol acetate butyrate, dipropylene glycol acetate butyrate, dipropylene glycol acetate propionate , Etc. include glycol diesters.

The alkylene glycol ethers may be alkylene glycol monoethers or diethers, and alkyl ethers are preferable. Specific examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylenel glycol monomethyl ether, and triethylene glycol. Monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monoethyl ether, tetraethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether , Dipropylene glycol monomethyl ether, Dipropylene glycol monoethyl ether, Dipropylene glycol monopropyl ether, Dipropylene glycol monobutyl ether, Tripropylene glycol monobutyl ether and other alkylene glycol monoalkyl ethers, and ethylene glycol dimethyl ether, ethylene glycol diethyl ether. Ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, diethylene glycol methyl ethyl ether, diethylene glycol methyl butyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol dibutyl ether, triethylene glycol methyl butyl ether, Examples thereof include alkylene glycol dialkyl ethers such as tetraethylene glycol dimethyl ether, tetraethylene glycol diethyl ether, tetraethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, and tripropylene glycol dimethyl ether. Be done.

Cyclic esters include β-propiolactone, γ-butyrolactone, δ-valerolactone, ε-caprolactone, β-butyrolactone, β-valerolactone, γ-valerolactone, β-hexanolactone, and γ-hexanolactone. , Δ-Hexanolactone, β-Heptanolactone, γ-Heptanolactone, δ-Heptanolactone, ε-Heptanolactone, γ-Octanolactone, δ-Octanolactone, ε-Octanolactone, δ Cyclic esters (lactones) such as −nonalactone, ε-nonalactone, and ε-decanolactone, and compounds in which the hydrogen of the methylene group adjacent to their carbonyl group is replaced by an alkyl group having 1 to 4 carbon atoms are mentioned. Can be done.

Examples of alkoxyalkylamides include 3-methoxy-N, N-dimethylpropionamide, 3-methoxy-N, N-diethylpropionamide, 3-methoxy-N, N-methylethylpropionamide and 3-ethoxy-. N, N-dimethylpropionamide, 3-ethoxy-N, N-diethylpropionamide, 3-ethoxy-N, N-methylethylpropionamide, 3-n-butoxy-N, N-dimethylpropionamide, 3-n -Butoxy-N, N-diethylpropionamide, 3-n-butoxy-N, N-methylethylpropionamide, 3-n-propoxy-N, N-dimethylpropionamide, 3-n-propoxy-N, N- Diethylpropionamide, 3-n-propoxy-N, N-methylethylpropionamide, 3-iso-propoxy-N, N-dimethylpropionamide, 3-iso-propoxy-N, N-diethylpropionamide, 3-iso -Propoxy-N, N-methylethylpropionamide, 3-tert-butoxy-N, N-dimethylpropionamide, 3-tert-butoxy-N, N-diethylpropionamide, 3-tert-butoxy-N, N- Methylethylpropionamide, etc. can be exemplified.

Examples of cyclic amides include lactams, for example, 2-pyrrolidone, 1-methyl-2-pyrrolidone, 1-ethyl-2-pyrrolidone, 1-propyl-2-pyrrolidone, 1-butyl-2-pyrrolidone, Such as pyrrolidones and the like.

Examples of the polyhydric alcohol include 1,2-alkanediol (for example, ethylene glycol, propylene glycol (also known as propane-1,2-diol), 1,2-butanediol, 1,2-pentanediol, 1,2-pentanediol, and 1,2-alcandiol. Polyhydric alcohols (polycols) excluding hexanediol, 1,2-heptandiol, 1,2-octanediol and other alcandiols), 1,2-alkanediol and the like (eg, diethylene glycol, dipropylene glycol, triethylene glycol) , 1,3-Propanediol, 1,3-butanediol (also known as 1,3-butylene glycol), 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2-ethyl- 2-Methyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 3-Methyl-1,3-butanediol, 2-ethyl-1,3-hexanediol, 3-methyl-1,5-pentanediol, 2-methylpentane-2,4-diol, trimethylolpropane, glycerin, etc. ) Etc. can be mentioned.

As the water-based pigment inkjet ink composition, one kind of water-soluble organic solvent may be used alone, or two or more kinds may be used in combination. The total content of the water-soluble organic solvent with respect to the total mass of the water-based pigment inkjet ink composition is, for example, 5.0% by mass or more and 50.0% by mass or less, and 10.0% by mass or more and 40.0. It is preferably 15.0% by mass or more, more preferably 15.0% by mass or more and 30.0% by mass or less, and further preferably 15.0% by mass or more and 20.0% by mass or less. When the content of the water-soluble organic solvent is within the above range, the balance between the wettability and the dryness of the water-based pigment inkjet ink composition is further improved, and it is easy to form a high-quality image.

(3) Surfactant The water-based pigment inkjet ink composition according to the present embodiment may contain a surfactant. The surfactant can be used to reduce the surface tension of the water-based pigment inkjet ink composition and to adjust and improve the wettability with a recording medium (permeability into a cloth or the like). As the surfactant, it is preferable to contain at least one selected from a silicone compound, a fluorine compound, an acetylene glycol compound and a polyoxyethylene compound. In addition, in this specification, a silicone compound, a fluorine compound, an acetylene glycol compound, and a polyoxyethylene compound are generically referred to as a "surfactant".

The silicone compound is not particularly limited, but a polysiloxane-based compound can be used. Examples of the polysiloxane-based compound include polyether-modified organosiloxane. Commercially available products of the polyether-modified organosiloxane include, for example, BYK-028, BYK-306, BYK-307, BYK-333, BYK-341, BYK-345, BYK-346, BYK-347, BYK-348, BYK. -349 (trade name, BYK), KF-351A, KF-352A, KF-353, KF-354L, KF-355A, KF-615A, KF-945, KF-640, KF-642, KF-643 , KF-6020, X-22-4515, KF-6011, KF-6012, KF-6015, KF-6017 (trade name, Shin-Etsu Chemical Co., Ltd.), Silface SAG002, 005, 503A, 008 (trade name). , Nissin Chemical Industry Co., Ltd.).

The fluorine compound is not particularly limited, and for example, perfluoroalkyl sulfonate, perfluoroalkyl carboxylic acid salt, perfluoroalkyl phosphate, perfluoroalkyl ethylene oxide adduct, perfluoroalkyl betaine, perfluoroalkylamine. Examples thereof include oxide compounds and fluorine-modified polymers. Examples of these commercially available products include S-144, S-145 (trade name, Asahi Glass Co., Ltd.), FC-170C, FC-430, Florard FC4430 (trade name, Sumitomo 3M Ltd.), FSO, FSO-100. , FSN, FSN-100, FSN-300 (trade name, DuPont), FT-250, FT-251 (trade name, Neos), BYK-340 (trade name, BYK) and the like.

The acetylene glycol compound is not particularly limited, but for example, Surfinol 104, 104E, 104H, 104A, 104BC, 104DPM, 104PA, 104PG-50, 104S, 420, 440, 465, 485, SE, SE-F, 504. , 61, DF37, CT111, CT121, CT131, CT136, TG, GA, DF110D, Dynol 604, 607 (trade name: Air Products and Chemicals, Inc.), Orfin B, Y, P, A, STG, SPC , E1004, E1010, E1020, PD-001, PD-002W, PD-003, PD-004, PD-005, EXP. 4001, EXP. 4036, EXP. 4051, EXP. 4123, EXP. 4200, EXP. 4300, AF-103, AF-104, AK-02, SK-14, AE-3 (trade name, Nissin Chemical Industry Co., Ltd.), acetylenol E00, E00P, E40, E60, E100 (trade name, Kawaken) Fine Chemical Co., Ltd.) and the like.

The polyoxyethylene compound is not particularly limited, but for example, Newcol 2300 series (2303, 2327, 2399-S, etc.), Newcol NT series (3, 5, 7, 9, etc.), Newcol 1000 series. (1004, 1006, 1008, 1203, 1305, 1525, etc.) (trade name, Nippon Emulsion Co., Ltd.), Emargen 102KG, 103, 104P, 105, 106, 108, 120, 147, 150, 220, 350, 404, 420 , 430,705,707,709,1108,4085,2025G (trade name, Kao Corporation), polyoxyethylene polyoxypropylene hexyl ether _{(C 6 H 13 -EO-PO} -OH) polyoxyethylene alkyl ethers such as Examples include compounds.

When a surfactant is used, one type may be used alone, or two or more types may be used in combination. By adding such a surfactant to the water-based pigment inkjet ink composition, it is possible to reduce the surface tension while suppressing foaming. As a result, the wettability to a recording medium such as a cloth is improved, and an image, a pattern, or the like can be clearly printed. The content of the surfactant is preferably, for example, 0.05% by mass or more and 5% by mass or less with respect to the total mass of the ink composition. More preferably, it is 0.1% by mass or more and 5% by mass or less, and further preferably 0.2% by mass or more and 4% by mass or less.

Further, since the water-based pigment inkjet ink composition contains a surfactant, the stability when ejected from the recording head tends to increase. In addition, the use of an appropriate amount of surfactant may improve the permeability to the fabric and increase the contact with the treatment liquid composition.

(4) pH Adjusting Agent In the water-based pigment inkjet ink composition of the present embodiment, a pH adjusting agent can be added for the purpose of adjusting the pH. The pH adjusting agent is not particularly limited, and examples thereof include an appropriate combination of an acid, a base, a weak acid, and a weak base. Examples of acids and bases used in such combinations include sulfuric acid, hydrochloric acid, nitric acid as inorganic acids, lithium hydroxide, sodium hydroxide, potassium hydroxide, potassium dihydrogen phosphate, dihydrogen phosphate as inorganic bases. Examples thereof include sodium, potassium carbonate, sodium carbonate, sodium hydrogencarbonate, ammonia and the like, and examples of the organic base include triethanolamine, diethanolamine, monoethanolamine, tripropanolamine, triisopropanolamine, diisopropanolamine and trishydroxymethylaminomethane (trishydroxymethylaminomethane). THAM) and the like, and examples of the organic acid include adipic acid, citric acid, succinic acid, lactic acid, N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid (BES), 4- (2-hydroxy). Ethyl) -1-piperazin ethanesulfonic acid (HEEPS), morpholinoethanesulfonic acid (MES), carbamoylmethyliminobisacetic acid (ADA), piperazin-1,4-bis (2-ethanesulfonic acid) (PIPES), N- Goods such as (2-acetamide) -2-aminoethanesulfonic acid (ACES), coramine hydrochloride, N-tris (hydroxymethyl) methyl-2-aminoethanesulfonic acid (TES), acetamide glycine, tricin, glycinamide, bicin, etc. A buffer, a phosphate buffer, a citrate buffer, a Tris buffer, or the like may be used. Further, among these, as a part or all of the pH adjuster, tertiary amines such as triethanolamine and triisopropanolamine, and carboxyl group-containing organic acids such as adipic acid, citric acid, succinic acid and lactic acid, Is preferable because the pH buffering effect can be obtained more stably.

(5) Ureas Ureas may be used as a moisturizer for the water-based pigment inkjet ink composition or as a dyeing aid for improving the dyeing property of the dye. Specific examples of ureas include urea, ethylene urea, tetramethylurea, thiourea, 1,3-dimethyl-2-imidazolidinone and the like. When ureas are contained, the content thereof can be 1% by mass or more and 10% by mass or less with respect to the total mass of the water-based pigment inkjet ink composition.

(6) Sugars Water-based pigments Sugars may be used for the purpose of suppressing solidification and drying of the inkjet ink composition. Specific examples of saccharides include glucose, mannose, fructose, ribose, xylose, arabinose, galactose, aldonic acid, glucitol (sorbit), maltose, cellobiose, lactose, sucrose, trehalose, maltotriose and the like.

(7) Chelating agent A chelating agent may be used for the purpose of removing unnecessary ions in the aqueous pigment inkjet ink composition. Examples of the chelating agent include ethylenediaminetetraacetic acid and salts thereof (ethylenediaminetetraacetic acid dihydrogen disodium salt, or ethylenediamine nitrilotriacetate, hexametaphosphate, pyrophosphate, metaphosphate, etc.) and the like. Be done.

(8) Preservatives and Antifungal Agents Preservatives and antifungal agents may be used in the water-based pigment inkjet ink composition. Examples of preservatives and fungicides include sodium benzoate, sodium pentachlorophenol, sodium 2-pyridinethiol-1-oxide, sodium sorbate, sodium dehydroacetate, proxel CRL, proxel BDN, proxel GXL, and proxel XL-. 2. Proxel IB, Proxel TN (all manufactured by Lonza Japan Co., Ltd., trade name), 4-chloro-3-methylphenol (Preventor CMK manufactured by Bayer Co., Ltd., etc.) and the like can be mentioned.

(9) Rust preventive agent A rust preventive agent may be used in the water-based pigment inkjet ink composition. Preferred examples of the rust preventive include benzotriazole, acidic sulfite, sodium thiosulfate, ammon thioglycolate, diisopropylammonylnitrite, pentaerythritol tetranitrate, dicyclohexylammonium nitrite and the like. Of these, benzotriazole is particularly preferable.

(10) Others Further, as a component other than the above, an additive that can be usually used in an ink composition for inkjet, such as an ultraviolet absorber, an antioxidant, an oxygen absorber, and a solubilizing agent, may be contained. ..

1.1.4. Water-based pigment inkjet ink composition and its production and physical properties As described above, the water-based pigment inkjet ink composition contained in the composition set of the present embodiment is composed of the water-based pigment inkjet ink composition, which comprises an organic fluorescent pigment and resin particles. , And the organic fluorescent pigment does not have the cohesiveness due to the cation component contained in the treatment liquid composition described later used together with the water-based pigment inkjet ink composition, and the resin particles have the cohesiveness due to the cation component. However, the content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

Therefore, according to the water-based pigment inkjet ink composition, since the content of the organic fluorescent pigment in the water-based pigment inkjet ink composition is high, an image having good color development property can be obtained. Further, since the resin particles of the water-based pigment inkjet ink composition aggregate so as to wrap the organic fluorescent pigment, it is possible to form an image having good color development by suppressing the sinking of the organic fluorescent pigment into the recording medium. Further, since the organic fluorescent pigment does not have cohesiveness, the smoothness of the surface of the coating film of the image becomes good, so that an image having good light resistance can be formed.

The water-based pigment inkjet ink composition according to the present embodiment is obtained by mixing the above-mentioned components in an arbitrary order and, if necessary, filtering or the like to remove impurities. As a method of mixing each component, a method of sequentially adding materials to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer and stirring and mixing them is preferably used.

The water-based pigment inkjet ink composition according to the present embodiment preferably has a surface tension of 20 to 40 mN / m from the viewpoint of a balance between printing quality and reliability as an inkjet printing ink, and is 22 to 35 mN / m. Is more preferable. From the same viewpoint, the viscosity of the water-based pigment inkjet ink composition at 20 ° C. is preferably 1.5 to 10 mPa · s, and more preferably 2 to 8 mPa · s. In order to keep the surface tension and viscosity within the above ranges, the types of the above-mentioned water-soluble solvent and surfactant, the amount of these and water added, and the like may be appropriately adjusted.

1.2. Treatment Liquid Composition The composition set comprises a treatment liquid composition. The treatment liquid composition contains a cationic component.

1.2.1. Cationic component The cationic component can agglomerate the resin particles contained in the water-based pigment inkjet ink composition. By such aggregation, for example, effects such as enhancing the color development property of the organic fluorescent pigment, enhancing the fixability of the image, and enhancing the smoothness of the surface can be obtained.

The cationic component is not particularly limited as long as it exhibits an agglutinating action on resin particles, and examples thereof include metal salts, inorganic acids, and other cationic compounds. As the other cationic compound, a cationic resin (sometimes also referred to as a cationic polymer) or the like can be used. Among these, a polyvalent metal salt is preferable as the metal salt from the viewpoint of excellent cohesiveness of the resin particles. Further, as the other cationic compound, a cationic resin is preferable from the viewpoint of excellent cohesiveness of the resin particles. Therefore, it is preferable to use at least one of a cationic resin and a polyvalent metal salt as the cationic component, because the obtained color development property, light resistance and the like are particularly excellent. In addition, a plurality of types of cation components can be used in combination.

A polyvalent metal salt is a compound composed of divalent or higher metal ions and anions. Examples of the divalent or higher metal ion include ions such as calcium, magnesium, copper, nickel, zinc, barium, aluminum, titanium, strontium, chromium, cobalt, and iron. Among the metal ions constituting these polyvalent metal salts, at least one of calcium ions and magnesium ions is preferable from the viewpoint of excellent cohesiveness of ink components.

The anion constituting the polyvalent metal salt is an inorganic ion or an organic ion. That is, the polyvalent metal salt in the present invention is composed of inorganic ions or organic ions and polyvalent metals. Examples of such inorganic ions include chloride ions, bromine ions, iodine ions, nitrate ions, sulfate ions, and hydroxide ions. Examples of the organic ion include an organic acid ion, and examples thereof include a carboxylic acid ion.

The polyvalent metal compound is preferably an ionic polyvalent metal salt, and particularly when the polyvalent metal salt is a magnesium salt or a calcium salt, the storage stability of the treatment liquid composition becomes better. ..

Specific examples of the above polyvalent metal salts include calcium carbonate such as heavy calcium carbonate and light calcium carbonate, calcium nitrate, calcium chloride, calcium sulfate, magnesium sulfate, calcium hydroxide, magnesium chloride, magnesium carbonate, barium sulfate, and chloride. Examples thereof include barium, zinc carbonate, zinc sulfide, aluminum silicate, calcium silicate, magnesium silicate, copper nitrate, calcium acetate, magnesium acetate and aluminum acetate. These polyvalent metal salts may be used alone or in combination of two or more. Among these, at least one of magnesium sulfate, calcium nitrate and calcium chloride is preferable because sufficient solubility in water can be ensured and traces due to the treatment liquid composition are reduced (traces become inconspicuous). , Calcium chloride is more preferred. In addition, these metal salts may have hydration water in the raw material form.

Examples of the metal salt other than the polyvalent metal salt include monovalent metal salts such as sodium salt and potassium salt, and examples thereof include sodium sulfate and potassium sulfate.

Preferred examples of the inorganic acid include sulfuric acid, hydrochloric acid, nitric acid, and phosphoric acid. The inorganic acid may be used alone or in combination of two or more.

Examples of the cationic resin (cationic polymer) include a cationic urethane resin, a cationic olefin resin, a cationic amine resin, and a cationic surfactant. Cationic polymers are preferably water soluble.

Commercially available products can be used as the cationic urethane resin, for example, Hydran CP-7010, CP-7020, CP-7030, CP-7040, CP-7050, CP-7060, CP-7610 (trade name). , Dainippon Ink and Chemicals Co., Ltd.), Superflex (SF) 600, 610, 620, 630, 640, 650 (trade name, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), Urethane Emulsion WBR-2120C, WBR-2122C ( Product name, manufactured by Taisei Fine Chemical Co., Ltd.) can be used.

The cationic olefin resin has an olefin such as ethylene or propylene in its structural skeleton, and known ones can be appropriately selected and used. Further, the cationic olefin resin may be in an emulsion state in which it is dispersed in a solvent containing water, an organic solvent and the like. As the cationic olefin resin, a commercially available product can be used, and examples thereof include arrow base CB-1200 and CD-1200 (trade name, manufactured by Unitika Ltd.).

The cationic amine resin may be any as long as it has an amino group in its structure, and known ones can be appropriately selected and used. For example, polyamine resin, polyamide resin, polyallylamine resin and the like can be mentioned. A polyamine resin is a resin having an amino group in the main skeleton of the resin. Polyamide resin is a resin having an amide group in the main skeleton of the resin. The polyallylamine resin is a resin having a structure derived from an allyl group in the main skeleton of the resin.

As the cationic polyamine-based resin, Unisense KHE103L (hexamethylenediamine / epichlorohydrin resin, 1% aqueous solution pH about 5.0, viscosity 20 to 50 (mPa · s), solid content concentration 50) manufactured by Senka Co., Ltd. (Mass% aqueous solution), Unisense KHE104L (dimethylamine / epichlorohydrin resin, 1% aqueous solution pH about 7.0, viscosity 1-10 (mPa · s), solid content concentration 20% by mass) and the like. .. Further, specific examples of commercially available products of cationic polyamine-based resins include FL-14 (manufactured by SNF), Alafix 100, 251S, 255, 255LOX (manufactured by Arakawa Chemical Co., Ltd.), DK-6810, 6853, 6885; WS. -4010, 4011, 4020, 4024, 4027, 4030 (manufactured by Seiko PMC), Papiogen P-105 (manufactured by Senka), Smilase Resin 650 (30), 675A, 6615, SLX-1 (manufactured by Taoka Chemical Industry Co., Ltd.) ), Kachio Master (registered trademark) PD-1, 7, 30, A, PDT-2, PE-10, PE-30, DT-EH, EPA-SK01, TMHMDA-E (manufactured by Yokkaichi Chemical Co., Ltd.), Jetfix 36N, 38A, 5052 (manufactured by Satoda Kako Co., Ltd.) can be mentioned.

Polyallylamine resins include, for example, polyallylamine hydrochloride, polyallylamineamide sulfate, allylamine hydrochloride / diallylamine hydrochloride copolymer, allylamine acetate / diallylamine acetate copolymer, allylamine acetate / diallylamine acetate copolymer, allylamine hydrochloride / dimethyl. Allylamine hydrochloride copolymer, allylamine / dimethylallylamine copolymer, polydiallylamine hydrochloride, polymethyldiallylamine hydrochloride, polymethyldiallylamineamide sulfate, polymethyldiallylamine acetate, polydiallyldimethylammonium chloride, diallylamine acetate / sulfur dioxide copolymer, diallyl Examples thereof include methyl ethyl ammonium ethyl sulfate / sulfur dioxide copolymer, methyl diallylamine hydrochloride / sulfur dioxide copolymer, diallyl dimethyl ammonium chloride / sulfur dioxide copolymer, diallyl dimethyl ammonium chloride / acrylamide copolymer and the like. Examples of commercially available polyallylamine resins include PAA-SA (trade name, manufactured by Knitbo Medical Co., Ltd., cationic polyallylamine amide sulfate polymer).

The total content of the cation components in the treatment liquid composition is not particularly limited, but is preferably 0.1% by mass or more and 20.0% by mass or less with respect to the total mass of the treatment liquid composition. Further, it is preferably 0.5% by mass or more and 15.0% by mass or less, more preferably 1.0% by mass or more and 10.0% by mass or less, and 2.0% by mass or more and 5.0% by mass or less. Is even more preferable.

1.2.2. Other components, etc. The treatment liquid composition, in addition to the cationic component, contains water, a water-soluble organic solvent, a surfactant, a wax, an additive, a preservative, a rust preventive, a chelating agent, and a viscosity, as long as the function is not impaired. Ingredients such as a modifier, an antioxidant, and a fungicide may be contained. These other components can also be used in the above-mentioned water-based pigment inkjet ink composition, and detailed description thereof will be omitted.

Further, the treatment liquid composition is obtained by mixing each of the above-mentioned components in an arbitrary order and, if necessary, filtering or the like to remove impurities. As a method of mixing each component, a method of sequentially adding materials to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer and stirring and mixing them is preferably used. Further, when the treatment liquid composition is used by the inkjet method, the physical characteristics of the treatment liquid composition are preferably the same as those of the water-based pigment inkjet ink composition described above.

1.3. Action effect, etc. According to the composition set of the present embodiment, since the water-based pigment inkjet ink composition and the treatment liquid composition are included, an image having a high content of organic fluorescent pigment and good color development can be obtained. .. Further, since the resin particles aggregate so as to wrap the organic fluorescent pigment, it is possible to form an image having good color development by suppressing the sinking of the organic fluorescent pigment into the recording medium. Further, since the organic fluorescent pigment does not have cohesiveness, the smoothness of the surface of the coating film of the image becomes good, so that an image having good light resistance can be formed.

1.4. Water-based white pigment inkjet ink composition The composition set of the present embodiment may further include a water-based white pigment inkjet ink composition containing a white pigment. When the water-based white pigment inkjet ink composition is included in the composition set, the base layer of the water-based pigment inkjet ink composition can be formed by the water-based white pigment inkjet ink composition, so that an image excellent in color development and light resistance is formed. be able to.

1.4.1. Water-based white pigment inkjet ink composition The water-based white pigment inkjet ink composition contains a white pigment.
1.4.1.1. White Pigment Water-based White Pigment Examples of the white pigment contained in the inkjet ink composition include metal compounds such as metal oxides, barium sulfate, and calcium carbonate. Examples of the metal oxide include titanium dioxide, zinc oxide, silica, alumina, magnesium oxide and the like. Further, as the white pigment, particles having a hollow structure may be used, and as the particles having a hollow structure, known particles can be used.

Among the above-exemplified white pigments, titanium dioxide is preferably used from the viewpoint of good whiteness and abrasion resistance. The white pigment may be used alone or in combination of two or more.

The volume-based average particle size (D50) of the white pigment (also referred to as “volume average particle size”) is set to be larger than the volume average particle size of the inorganic fine particles described later. The volume average particle size of the white pigment is preferably 30.0 nm or more and 600.0 nm or less, more preferably 100.0 nm or more and 500.0 nm or less, and further preferably 150.0 nm or more and 400.0 nm or less. When the volume average particle size of the white pigment is within the above range, the particles are less likely to settle, the dispersion stability can be improved, and the nozzle is less likely to be clogged when applied to an inkjet recording device. be able to. Further, when the volume average particle size of the white pigment is within the above range, the color density such as whiteness can be sufficiently satisfied.

The volume average particle size of the white pigment can be measured by a particle size distribution measuring device based on the laser diffraction / scattering method. Examples of the particle size distribution measuring device include a particle size distribution meter (for example, NanotracWaveII-EX150 manufactured by Microtrack Bell Co., Ltd.) based on a dynamic light scattering method.

In the present specification, the term "white" when referring to an aqueous white pigment inkjet ink composition, a white pigment, etc. does not mean only completely white, but a chromatic color or a color as long as it can be visually recognized as white. Includes achromatic and glossy colors. More quantitatively, "white" includes ^{not only colors in which L *} is 100, but also colors in which L ^* is 80 or more and 100 or less and a ^* and b ^* are ± 10 or less, respectively, in CIELAB, for example. ..

The content (solid content) of the white pigment in the water-based white pigment inkjet ink composition is 0.5% by mass or more and 20% by mass or less, preferably 1% by mass or more, based on the total mass of the water-based white pigment inkjet ink composition. It is 15% by mass or less, more preferably 5% by mass or more and 10% by mass or less. When the content of the white pigment is within the above range, clogging of the nozzle of the recording head is unlikely to occur, and the color density such as whiteness can be sufficiently satisfied.

It is preferable that the white pigment can be stably dispersed in water, and therefore, a dispersant may be used to disperse the white pigment. The dispersant may be any of a surfactant, a resin dispersant and the like, and is selected from those capable of improving the dispersion stability of the white pigment in the water-based white pigment inkjet ink composition. Further, the white pigment may be used as a self-dispersing pigment by modifying the surface of the pigment particles by oxidizing or sulfonation the surface of the pigment with, for example, ozone, hypochlorous acid, fuming sulfuric acid or the like. ..

As the resin dispersant, poly (meth) acrylic acid, (meth) acrylic acid-acrylic nitrile copolymer, (meth) acrylic acid- (meth) acrylic acid ester copolymer, vinyl acetate- (meth) acrylic acid ester (Meta) acrylic resins such as copolymers, vinyl acetate- (meth) acrylic acid copolymers, vinylnaphthalene- (meth) acrylic acid copolymers and salts thereof; styrene- (meth) acrylic acid copolymers, Styrene- (meth) acrylic acid- (meth) acrylic acid ester copolymer, styrene-α-methylstyrene- (meth) acrylic acid copolymer, styrene-α-methylstyrene- (meth) acrylic acid- (meth) A styrene resin such as an acrylic acid ester copolymer, a styrene-maleic acid copolymer, a styrene-maleic anhydride copolymer and a salt thereof; a polymer compound (resin) containing a urethane bond in which an isocyanate group and a hydroxyl group are reacted. ), Which may be linear and / or branched, and a urethane resin and a salt thereof regardless of the presence or absence of a crosslinked structure; polyvinyl alcohols; a vinylnaphthalene-maleic acid copolymer and a salt thereof; vinyl acetate. -Maleic acid ester copolymer and its salt; and; Vinyl acetate-crotonic acid copolymer and its salt and other water-soluble resins can be mentioned. Among these, a copolymer of a monomer having a hydrophobic functional group and a monomer having a hydrophilic functional group, and a polymer composed of a monomer having both a hydrophobic functional group and a hydrophilic functional group are preferable. As the form of the copolymer, any form of a random copolymer, a block copolymer, an alternating copolymer, and a graft copolymer can be used.

Commercially available styrene resin dispersants include, for example, X-200, X-1, X-205, X-220, X-228 (manufactured by Seiko PMC Corporation), Nopco Spars (registered trademark) 6100, 6110 (San Nopco Ltd.). (Company), John Krill 67, 586, 611, 678, 680, 682, 819 (BASF), DISPERBYK-190 (Big Chemie Japan Co., Ltd.), N-EA137, N-EA157, N-EA167, N -EA177, N-EA197D, N-EA207D, E-EN10 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) and the like can be mentioned.

Commercially available acrylic resin dispersants include BYK-187, BYK-190, BYK-191, BYK-194N, BYK-199 (manufactured by BIC Chemie Co., Ltd.), Aron A-210, A6114, AS-1100, AS-1800, A-30SL, A-7250, CL-2 manufactured by Toagosei Co., Ltd.) and the like.

Further, as commercially available urethane-based resin dispersants, BYK-182, BYK-183, BYK-184, BYK-185 (manufactured by Big Chemie Co., Ltd.), TEGO Disperse710 (manufactured by Evonik Tego Chemi), Borchi (registered trademark) Gen1350 (manufactured by OMG Borschers) and the like can be mentioned.

The dispersant may be used alone or in combination of two or more. The total content of the dispersant is preferably 0.1 parts by mass or more and 30 parts by mass or less, more preferably 0.5 parts by mass or more and 25 parts by mass or less, and even more preferably 1 with respect to 60 parts by mass of the white pigment. It is 5 parts by mass or more and 20 parts by mass or less, more preferably 1.5 parts by mass or more and 15 parts by mass or less. When the content of the dispersant is at least the above range, the dispersion stability of the white pigment can be further enhanced. Further, when the content of the dispersant is not more than the above range, the viscosity of the obtained dispersion can be suppressed to a small value.

Further, it is preferable that the white pigment itself does not have the property of agglutinating by the agglutinating agent in the above-mentioned treatment liquid composition. The cohesiveness of the white pigment depends on the above-mentioned dispersant. A white pigment or a dispersant may be appropriately selected depending on the desired cohesiveness. The cohesiveness of the white pigment due to the flocculant is a monomer (monomer) used for the synthesis of the resin when the amount of anionic groups on the surface of the white pigment is adjusted or when the white pigment is dispersed using a resin. ) Can be adjusted by adjusting the type and composition ratio.

1.4.1.2. Other components, etc. In addition to white pigments, water-based white pigment inkjet ink compositions include resin particles, waxes, water, water-soluble organic solvents, surfactants, additives, preservatives / fungicides, rust inhibitors, and chelates. It may contain components such as an agent, a viscosity modifier, an antioxidant, and a fungicide. These other components can also be used in the above-mentioned water-based pigment inkjet ink composition, and detailed description thereof will be omitted. The resin particles that may be contained in the white pigment may or may not have an agglutinating action due to the above-mentioned flocculant.

Further, the water-based white pigment inkjet ink composition is obtained by mixing the above-mentioned components in an arbitrary order and, if necessary, filtering or the like to remove impurities. As a method of mixing each component, a method of sequentially adding materials to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer and stirring and mixing them is preferably used. Further, when the water-based white pigment inkjet ink composition is used by the inkjet method, its physical properties are preferably the same as those of the water-based pigment inkjet ink composition described above.

1.4.2. Action effect, etc. When the composition set of the present embodiment contains an aqueous white pigment inkjet ink composition, a base layer is formed by the aqueous white pigment inkjet ink composition, and the treatment liquid composition and the aqueous pigment inkjet ink composition are formed on the base layer. Images can be formed using objects. Therefore, the color development property is further improved, the smoothness of the surface of the image can be further improved, and an image having better light resistance can be formed.

2. Inkjet recording method In the inkjet recording method of the present embodiment, a treatment liquid attachment step of attaching a treatment liquid composition containing a cation component to a recording medium and a region where the treatment liquid composition of the recording medium is attached are subjected to. It includes an ink adhering step of adhering a water-based pigment inkjet ink composition containing an organic fluorescent pigment and resin particles.

Hereinafter, the outline of the inkjet recording apparatus that can be used in the inkjet recording method of the present embodiment will be described, and then each step will be described.

2.1. Inkjet recording device The inkjet recording device can be used in either a serial type or a line type. A recording head is mounted on these types of inkjet recording devices, and droplets of a predetermined composition are ejected from a nozzle hole of the recording head while changing the relative positional relationship between the recording medium and the recording head. A predetermined image can be formed by ejecting the composition at a predetermined timing and at a predetermined volume (mass) and adhering the composition to the recording medium.

For the inkjet recording device, for example, a known configuration such as a drying unit, a roll unit, and a winding device can be arbitrarily adopted. Further, the inkjet recording apparatus may have a transport means for transporting a recording medium, an image layer forming means for recording an image using a predetermined composition, a drying means, a whole drying means for heating and blowing a recording surface, and the like. can.

The transport means can be configured by, for example, a roller. The transport means may have a plurality of rollers. The position and number of the conveying means are arbitrary as long as the recording medium can be conveyed. The transporting means may include a roll mechanism, a tray, a belt, various platens, and the like.

The image layer forming means is used to obtain at least the treatment liquid composition, the water-based pigment inkjet ink composition, and the water-based white pigment inkjet ink composition and the water-based pigment inkjet ink composition on the recording surface of the recording medium. The image layer can be recorded by ejecting an object. The treatment liquid composition does not have to be applied by inkjet, and may be applied to the recording medium by using a spray or a roller. The order and amount of these compositions attached to the recording medium can also be freely changed within a predetermined range. The image layer forming means includes a recording head provided with nozzles, and nozzle rows are assigned to each predetermined composition.

The drying means can be used for heating, drying and / or removing volatile components on the recording medium of the image layer formed on the recording surface. The drying means may be provided at any position or in any number in consideration of the timing of performing the composition adhering step, the transport path of the recording medium, and the like. Examples of the image layer drying means include a method of applying heat to the recording medium by heating the platen, a method of blowing wind on the image on the recording medium, a method of combining them, and the like. Specifically, the means used in these methods may be forced air heating, radiant heating, conductive heating, high frequency drying, microwave drying, or the like.

2.2. Recording medium The recording medium is preferably a cloth. The fibers constituting the fabric are not particularly limited, but are, for example, natural fibers such as cotton, linen, wool and silk, synthetic fibers such as polypropylene, polyester, acetate, triacetate, polyamide and polyurethane, and biodegradability such as polylactic acid. Fibers and blended fibers thereof are mentioned. Among these, the fabric preferably contains cotton or polyester. When these are used as the cloth, the effect of the present invention can be obtained more satisfactorily.

2.3. Each step of the recording method In the treatment liquid adhesion step and the ink adhesion step of the inkjet recording method, the treatment liquid composition and the aqueous pigment inkjet ink composition were ejected from the recording head to adhere the treatment liquid composition of the recording medium. Later, it can be carried out by adhering the water-based pigment inkjet ink composition to the region to which the treatment liquid composition is adhered. Further, the treatment liquid adhering step is not limited to the method of discharging from the recording head and adhering, and may be applied by using a spray or a roller.

Further, the inkjet recording method of the present embodiment is an aqueous white pigment inkjet ink containing a white pigment in a region to which the treatment liquid composition of the recording medium is adhered after the treatment liquid adhesion step and before the ink adhesion step. A white ink adhering step for adhering the composition may be further provided. In such a white ink adhesion step, the treatment liquid composition and the water-based white pigment inkjet ink composition are ejected from the recording head, and the water-based white pigment inkjet ink composition is applied to the region to which the treatment liquid composition of the recording medium is adhered. It can be carried out by adhering.

Further, the inkjet recording method of the present embodiment may further include a step of drying the aqueous white pigment inkjet ink composition adhering to the recording medium after the white ink adhering step and before the ink adhering step. The step of drying the water-based white pigment inkjet ink composition can be carried out by using the image layer drying means. Further, the operation is not limited to the inkjet recording apparatus, and can be performed by an appropriate image layer drying means installed elsewhere. Since the image obtained thereby can be dried, the water-based pigment inkjet ink composition can be attached after the water-based white pigment inkjet ink composition is dried.

As described above, the inkjet recording method of the present embodiment can be performed by using the above-mentioned inkjet recording apparatus. Further, the step of adhering each composition to the recording medium may be included a plurality of times, and the order and number of steps are not limited, and the steps can be appropriately performed as needed. When a plurality of compositions are used, they may be attached to different regions on the recording medium or to the same region.

Further, the inkjet recording method of the present embodiment can be appropriately added with other steps, and may include, for example, a heating step of heating the recording medium, a step of cleaning the printed fabric, and the like.

2.4. Action effect, etc. According to the inkjet recording method of the present embodiment, a white base layer can be formed by the white ink adhesion step. As a result, an image having better color development can be formed. Further, when the white ink adhering step is provided, the white base layer formed by the white ink adhering step can be reliably formed, so that the white pigment and the organic fluorescent pigment are less likely to be mixed in the coating film and are clear. It is easier to obtain images.

According to the inkjet recording method of the present embodiment, since the content of the organic fluorescent pigment in the water-based pigment inkjet ink composition is high, an image having good color development property can be obtained. Further, since the resin particles of the water-based pigment inkjet ink composition aggregate so as to wrap the organic fluorescent pigment, it is possible to form an image having good color development by suppressing the sinking of the organic fluorescent pigment into the recording medium. Further, since the organic fluorescent pigment does not have cohesiveness, the smoothness of the surface of the coating film of the image becomes good, so that an image having good light resistance can be formed.

3. 3. Examples and the like Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples. Hereinafter, "part" and "%" are based on mass unless otherwise specified. Unless otherwise specified, the evaluation was carried out in an environment of a temperature of 25.0 ° C. and a relative humidity of 40.0%.

3.1. Preparation of composition 3.1.1. Preparation of Treatment Liquid Composition The composition of the treatment liquid composition is shown in Table 1. The treatment liquid composition was prepared by mixing the components shown in Table 1, stirring for 30 minutes or more, and filtering. In the mixing method of each component, the material was added to a container equipped with a mechanical stirrer, and the mixture was stirred and mixed. After that, it was filtered through a filter to obtain each treatment liquid composition (T1 and T2). The content of PAA-SA in the table is a solid content conversion amount.

In Table 1, PAA-SA is a trade name and is a cationic polyallylamine amide sulfate polymer manufactured by Knitbo Medical Co., Ltd.

3.1.2. Preparation of Water-based Pigment Inkjet Ink Composition Table 2 shows the composition of the water-based pigment inkjet ink composition. The water-based pigment inkjet ink composition was prepared by mixing the components shown in Table 2, stirring for 30 minutes or more, and filtering. As a method of mixing each component, materials were sequentially added to a container equipped with a mechanical stirrer, and the mixture was stirred and mixed. After that, it was filtered through a filter to obtain each aqueous pigment inkjet ink composition (P1 to P11). Further, in the same manner, an aqueous white pigment inkjet ink composition (PW1) using titanium dioxide as the white pigment was prepared. The contents of the coloring material and the resin particles in the table are converted to solid content.

The components in Table 2 are as follows.
-Organic fluorescent pigment 1: Pink fluorescent pigment dispersion (manufactured by Shinroihi, SF-3017, particle size <0.2 μm)
-Organic fluorescent pigment 2: Pink fluorescent pigment dispersion (manufactured by Shinroihi, SF-5017, particle size <0.1 μm)
-White pigment: Titanium dioxide (Nanotek (registered trademark) Slurry, manufactured by CI Kasei Co., Ltd.)
-Resin particles 1: Takelac W-6061 (manufactured by Mitsui Chemicals, Inc.) No cohesiveness-Resin particles 2: Takelac W-6110 (manufactured by Mitsui Chemicals, Inc.) Cohesive, glass transition temperature = -20 ° C
-Resin particles 3: Superflex 620 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) Cohesive, glass transition temperature = 43 ° C
-BYK-348: Silicone-based surfactant (manufactured by BYK)
-EDTA: disodium ethylenediaminetetraacetate (reagent)
-Proxel: Proxel XL-2 (manufactured by Lonza Japan)

In addition, Table 2 shows the evaluation results of the cohesiveness of the coloring material and the resin particles. The presence or absence of cohesiveness was determined as follows. 15 cc of the treatment liquid composition T1 was placed in a glass bottle having a capacity of 30 cc. A dispersion of each coloring material or a dispersion of resin particles is dropped onto a glass bottle prepared separately with a dropper from above, and when dropped, each dispersion solidifies, separates from the treatment liquid, and floats on the water surface or a bottle. Those that sink to the bottom of the bottle are considered to be cohesive. On the other hand, when the dispersion or resin particles of each coloring material is dropped with a dropper, the dispersion does not solidify even if it comes into contact with the treatment liquid, and the dispersion is dissolved or turbid and diffuses as a whole without being clearly separated. There was no sex.

Further, Table 2 shows the ratio (B / A) of the content B of the resin particles to the content A of the organic fluorescent pigment as the ratio (B / A). For the water-based white pigment inkjet ink composition PW1, the ratio (B / A) of the content B of the resin particles to the content A of the white pigment was used.

3.2. Preparation of Printed Product The treatment liquid composition was uniformly applied to a 100% polyester fabric using a roller so as to be 6 to 8 g per A4 size. After coating, heat treatment was performed in an oven at 160 ° C. for two and a half minutes. The compositions prepared above were attached in the combinations shown in Table 3 by an inkjet method using an inkjet printer (manufactured by Seiko Epson Corporation, product name "PX-G930").

As the recording conditions, the recording resolution was 1440 dpi × 720 dpi, the ink mass was about 23 ng / dot, the recording range was A4 size, and a printed material in which a solid pattern image was formed on the cloth as the recording medium was manufactured.

In Example 7, after the water-based white pigment inkjet ink composition PW1 was attached, the water-based pigment inkjet ink composition P2 was attached by superimposing it on the region to which the PW1 was attached. The recording conditions of the water-based white pigment inkjet ink composition PW1 were a resolution of 1440 dpi × 1440 dpi and an ink mass of about 50 ng / dot, and a solid pattern image of the ink composition PW1 was formed on the cloth as the recording medium. The recording conditions of the water-based pigment inkjet ink composition P2 are that the recording resolution is 1440 dpi × 720 dpi, the ink mass is about 23 ng / dot, the recording range is A4 size, and a solid pattern image is formed on the cloth as the recording medium. Manufactured.

Here, the "solid pattern image" means an image in which dots are recorded for all pixels of the pixel which is the minimum recording unit area defined by the recording resolution.

The printed matter of each example was heat-treated in an oven at 160 ° C. for 8 minutes and dried.

3.3. Evaluation method 3.3.1. Color development The OD value of the printed material of each example was measured using a fluorescence spectrophotometer (“FD-7”, manufactured by Konica Minolta) to evaluate the color development. The results are shown in Table 3 after evaluation based on the following criteria.
A: OD value 0.85 or more B: OD value 0.65 or more and less than 0.85 C: OD value less than 0.65

3.3.2. For the cloth printed with Surface Roughness 100%, the arithmetic mean roughness Ra (μm) was measured as the surface roughness with a laser microscope. The results are shown in Table 3 after evaluation based on the following criteria.
A: Ra is less than 25 B: Ra is 25 or more and less than 30 C: Ra is 30 or more

3.3.3. Light resistance The printed material was installed in the Xenon light resistance tester XL-75s (trade name: manufactured by Suga Testing Machine Co., Ltd.), and an exposure test was conducted for 3 days under the conditions of 23 ° C., relative humidity of 50% RH, and illuminance of 25,000 lux. .. The pre-exposure OD value (D0) and the post-exposure OD value (D) of the obtained printed matter were measured using a fluorescence spectrophotometer (“FD-7”, manufactured by Konica Minolta Co., Ltd.) and optically measured by the following equation. The concentration residual rate (ROD) was determined, the light resistance was evaluated according to the following criteria, and the results are shown in Table 3.
ROD (%) = (D / D0) x 100
A: ROD is 60% or more B: ROD is 45% or more and less than 60% C: ROD is less than 45%

3.4. Evaluation Results As shown in Table 3, the treatment liquid composition contains a cation component, the water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles, and the organic fluorescent pigment contains a cation component. The composition is such that the resin particles have agglomerating property due to a cation component and the content of the organic fluorescent pigment is 3.0% by mass or more based on the total amount of the water-based pigment inkjet ink composition. It was found that in each of the examples in which the object was set, both the color development property and the light resistance of the formed image could be achieved at the same time. It is considered that this is partly because the content of the organic fluorescent pigment is high and the subduction of the organic fluorescent pigment in the recording medium is suppressed.

Examples 1 to 5 are the results of changing the amount of cohesive resin particles to 2%, 2.5%, 5%, 10%, and 15% when the amount of pigment is the same. If the amount of resin particles is too small, the cohesive force tends to be too small and it tends to be difficult to obtain color development. ) It is suggested that the color development tends to decrease.

Further, it is considered that the smoothness of the image (smaller surface roughness) is improved as the amount of the resin particles is larger because the unevenness of the cloth is filled. On the other hand, the smoothness is considered to change depending on the aggregation rate of the resin particles. When the organic fluorescent pigment does not have cohesiveness, the agglomeration rate is considered to change depending on the ratio (B / A). When the ratio of particles was large, unevenness was formed and the smoothness tended to be low.

Furthermore, the smoothness is considered to change depending on the film-forming property of the resin particles. It is considered that the lower the minimum film-forming temperature MFT, the easier it is to form a film and smooth it at a low temperature. Further, since the glass transition temperature correlates with the minimum film formation temperature, it is considered that the lower the glass transition temperature, the easier the film formation and the better the smoothness (for example, comparison with Examples 3 and 8).

In Example 7, since the water-based white pigment inkjet ink composition was attached before the water-based pigment inkjet ink composition was attached, it is considered that the white pigment blocked the color of the fabric and thus the color development property was improved. Further, in Example 7, it was found that the smoothness of the surface of the image was also improved by applying the water-based white pigment inkjet ink composition.

On the other hand, in Comparative Examples 1 to 3, the cohesive force was insufficient and the color developing property was insufficient. Further, in Comparative Example 4, the color development was inferior because the concentration of the organic fluorescent pigment was low. In Example 5, since the amount of resin particles was large, aggregation proceeded too quickly, causing graininess in image quality (color unevenness occurred), color development was slightly reduced, and smoothness was slightly reduced due to the high aggregation rate. .. Further, it is considered that the larger the amount of the resin particles, the smoother the printed cloth (the surface roughness Ra becomes smaller) and the smaller the surface area, which contributes to the better light resistance.

The above-described embodiments and modifications are merely examples, and the present invention is not limited thereto. For example, each embodiment and each modification can be combined as appropriate.

The present invention includes a configuration substantially the same as the configuration described in the embodiment, for example, a configuration having the same function, method and result, or a configuration having the same purpose and effect. The present invention also includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. The present invention also includes a configuration that exhibits the same effects as the configuration described in the embodiment or a configuration that can achieve the same object. The present invention also includes a configuration in which a known technique is added to the configuration described in the embodiment.

The following contents are derived from the above-described embodiments and modifications.

One aspect of the composition set is
A composition set containing a water-based pigment inkjet ink composition and a treatment liquid composition.
The treatment liquid composition contains a cationic component and contains
The water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles.
The organic fluorescent pigment does not have cohesiveness due to the cationic component,
The resin particles have cohesiveness due to the cation component and
The content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

According to this composition set, it is possible to obtain an image having a high content of the organic fluorescent pigment and good color development. Further, since the resin particles aggregate so as to wrap the organic fluorescent pigment, it is possible to form an image having good color development by suppressing the sinking of the organic fluorescent pigment into the recording medium. Further, since the organic fluorescent pigment does not have cohesiveness, the smoothness of the surface of the coating film of the image becomes good, so that an image having good light resistance can be formed.

In the embodiment of the composition set,
The glass transition temperature of the resin particles may be 0.0 ° C. or lower.

According to this composition set, since the resin particles are more flexible and the film-forming property is more excellent, the smoothness of the surface of the coating film is likely to be improved, and an image having better light resistance can be formed.

In the embodiment of the composition set,
The ratio (B / A) of the content B of the resin particles to the content A of the organic fluorescent pigment in the water-based pigment inkjet ink composition may be 0.5 or more and 2.0 or less.

According to this composition set, both the wrapping of the organic fluorescent pigment by the resin particles and the smoothing of the coating film by the resin particles are good, and an image having excellent color development and light resistance can be formed.

In the embodiment of the composition set,
The content of the resin particles may be 5.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

According to this composition set, it is possible to form an image having further excellent color development and light resistance.

In the embodiment of the composition set,
A water-based white pigment inkjet ink composition containing a white pigment may be further contained.

According to this composition set, since the base layer can be formed by the water-based white pigment inkjet ink composition, it is possible to form an image excellent in color development. Further, since the underlying layer is less affected by the surface roughness of the recording medium and the smoothness of the coating film is improved, an image having excellent light resistance can be formed.

In the embodiment of the composition set,
The white pigment does not have to have cohesiveness due to the cationic component.

According to this composition set, when an underlayer is formed by the water-based white pigment inkjet ink composition and an image is formed on the base layer by using the treatment liquid composition and the water-based pigment inkjet ink composition, the color development is excellent. Since the image can be formed and the surface smoothness of the image can be further improved, an image having better light resistance can be formed.

One aspect of the inkjet recording method is
A treatment liquid attachment step of attaching a treatment liquid composition containing a cation component to a recording medium, and
An ink adhesion step of adhering a water-based pigment inkjet ink composition containing an organic fluorescent pigment and resin particles to a region of the recording medium to which the treatment liquid composition is adhered.
With
The treatment liquid composition contains a cationic component and contains
The organic fluorescent pigment does not have cohesiveness due to the cationic component,
The resin particles have cohesiveness due to the cation component and
The content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

According to this inkjet recording method, since the content of the organic fluorescent pigment in the water-based pigment inkjet ink composition is high, an image having good color development can be obtained. Further, since the resin particles of the water-based pigment inkjet ink composition aggregate so as to wrap the organic fluorescent pigment, it is possible to form an image having good color development by suppressing the sinking of the organic fluorescent pigment into the recording medium. Further, since the organic fluorescent pigment does not have cohesiveness, the smoothness of the surface of the coating film of the image becomes good, so that an image having good light resistance can be formed.

In the aspect of the inkjet recording method,
A white ink that adheres a water-based white pigment inkjet ink composition containing a white pigment to a region of the recording medium to which the treatment liquid composition has been adhered after the treatment liquid adhesion step and before the ink adhesion step. An adhesion step may be further provided.

According to this inkjet recording method, a white base layer can be formed by the white ink adhesion step. As a result, an image having better color development can be formed.

In the aspect of the inkjet recording method,
A step of drying the aqueous white pigment inkjet ink composition adhering to the recording medium may be further provided after the white ink adhering step and before the ink adhering step.

According to this inkjet recording method, the white base layer formed by the white ink adhesion step can be reliably formed, so that the white pigment and the organic fluorescent pigment are less likely to be mixed in the coating film, and a clear image can be obtained. Easier to get.

One aspect of the water-based pigment inkjet ink composition is
Water-based pigment inkjet ink composition
The water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles.
The organic fluorescent pigment does not have cohesiveness due to the cation component used together with the water-based pigment inkjet ink composition.
The resin particles have cohesiveness due to the cation component and
A water-based pigment inkjet ink composition in which the content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.

According to this water-based pigment inkjet ink composition, since the content of the organic fluorescent pigment in the water-based pigment inkjet ink composition is high, an image having good color development property can be obtained. Further, since the resin particles of the water-based pigment inkjet ink composition aggregate so as to wrap the organic fluorescent pigment, it is possible to form an image having good color development by suppressing the sinking of the organic fluorescent pigment into the recording medium. Further, since the organic fluorescent pigment does not have cohesiveness, the smoothness of the surface of the coating film of the image becomes good, so that an image having good light resistance can be formed.

Claims (10)

A composition set containing a water-based pigment inkjet ink composition and a treatment liquid composition.
The treatment liquid composition contains a cationic component and contains
The water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles.
The organic fluorescent pigment does not have cohesiveness due to the cationic component,
The resin particles have cohesiveness due to the cation component and
A composition set in which the content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition. In claim 1,
A composition set in which the glass transition temperature of the resin particles is 0.0 ° C. or lower. In claim 1 or 2,
A composition set in which the ratio (B / A) of the content B of the resin particles to the content A of the organic fluorescent pigment in the water-based pigment inkjet ink composition is 0.5 or more and 2.0 or less. In any one of claims 1 to 3,
A composition set in which the content of the resin particles is 5.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition. In any one of claims 1 to 4,
A composition set further comprising a water-based white pigment inkjet ink composition containing a white pigment. In claim 5,
A composition set in which the white pigment does not have cohesiveness due to the cationic component. A treatment liquid attachment step of attaching a treatment liquid composition containing a cation component to a recording medium, and
An ink adhesion step of adhering a water-based pigment inkjet ink composition containing an organic fluorescent pigment and resin particles to a region of the recording medium to which the treatment liquid composition is adhered.
With
The treatment liquid composition contains a cationic component and contains
The organic fluorescent pigment does not have cohesiveness due to the cationic component,
The resin particles have cohesiveness due to the cation component and
An inkjet recording method in which the content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition. In claim 7.
A white ink that adheres an aqueous white pigment inkjet ink composition containing a white pigment to a region of the recording medium to which the treatment liquid composition has been adhered after the treatment liquid adhesion step and before the ink adhesion step. An inkjet recording method further including an adhesion process. In claim 8.
An inkjet recording method further comprising a step of drying the water-based white pigment inkjet ink composition adhering to the recording medium after the white ink adhering step and before the ink adhering step. Water-based pigment inkjet ink composition
The water-based pigment inkjet ink composition contains an organic fluorescent pigment and resin particles.
The organic fluorescent pigment does not have cohesiveness due to the cation component used together with the water-based pigment inkjet ink composition.
The resin particles have cohesiveness due to the cation component and
A water-based pigment inkjet ink composition in which the content of the organic fluorescent pigment is 3.0% by mass or more with respect to the total amount of the water-based pigment inkjet ink composition.