JP2019209500A - Printing method, printing apparatus, container set, and print product - Google Patents

Abstract

To solve a problem that, in a case where print is performed by applying a coloring material ink containing a coloring material and water onto a non-absorbing recording medium such as plastic, a step of heating and drying is performed for evaporating a solvent such as water, then there is a problem that dots on the non-absorbent recording medium are uneven due to the heating and drying, and the glossiness of an image formed by the dots is reduced.SOLUTION: There is provided a printing method including: a pretreatment liquid applying step of applying a pretreatment liquid containing a water-insoluble plasticizer agent to a non-absorbent recording medium; and a color material ink applying step of applying a color material ink containing a color material and water onto the pretreatment layer which is a liquid phase formed by the applied pretreatment liquid.SELECTED DRAWING: None

Description

  The present invention relates to a printing method, a printing apparatus, a container set, and a printed matter.

  In industrial printing, a method is known in which an image is formed by ejecting a water-based ink onto a non-absorbent substrate such as a film by an inkjet recording method.

  In Patent Document 1, an ink jet recording sheet having a colorant receiving layer on a support made of a material such as plastic is immersed in an acidic solution and dried, and then ink droplets are ejected in accordance with a recording signal. An ink jet recording method for recording an image thereon is disclosed.

  However, when printing is performed by applying a coloring material ink containing a coloring material and water to a non-absorbing recording medium such as plastic, a solvent such as water in the coloring material ink applied to the non-absorbing recording medium. In order to evaporate, a step of performing heat drying is performed. At this time, the dots on the non-absorbent recording medium become uneven with heat drying, and there is a problem that the glossiness of an image formed by the dots is lowered.

  The invention according to claim 1 includes a pretreatment liquid application step for applying a pretreatment liquid containing a water-insoluble plasticizer to a non-absorbent recording medium, and a liquid phase formed by the applied pretreatment liquid. A color material ink application step of applying a color material ink containing a color material and water to a certain pretreatment layer.

  The printing method of the present invention has an excellent effect of suppressing a decrease in glossiness of an image.

FIG. 1 is an explanatory side view showing an example of the printing apparatus of the present invention. FIG. 2 is an explanatory plan view of an essential part showing an example of the printing apparatus of the present invention. FIG. 3 is an explanatory plan view showing an example of the printing apparatus of the present invention. FIG. 4 is an explanatory side view showing an example of the printing apparatus of the present invention. FIG. 5 is an explanatory plan view of an essential part showing an example of the printing apparatus of the present invention. FIG. 6 is an explanatory plan view showing an example of the printing apparatus of the present invention.

  Hereinafter, embodiments of the present invention will be described.

[Printing method]
The printing method of the present embodiment includes a pretreatment liquid application step and a color material ink application step. Moreover, it is preferable to include other processes, such as a transparent ink provision process and a heating process, as needed.

<< Pretreatment liquid application process >>
The pretreatment liquid application step is a step of applying a pretreatment liquid containing a water-insoluble plasticizer to the non-absorbent recording medium before the color material ink application step. The pretreatment liquid applied to the non-absorbent recording medium forms a pretreatment layer. After the pretreatment liquid application step, the color material ink applied on the pretreatment layer, which is a liquid layer, is not compatible with the pretreatment layer. Ink layer). Thereby, it is suppressed that the dots formed by the color material ink on the non-absorbent recording medium are uneven due to heat drying, and the decrease in the glossiness of the image formed by the dots is suppressed.

  In the pretreatment liquid application step, the pretreatment liquid is selectively applied to the step of applying the pretreatment liquid to the entire recording surface of the non-absorbent recording medium and the region to which the color material ink of the non-absorbent recording medium is applied. Although it may be any step such as a step of applying, it is preferably a step of selectively applying a pretreatment liquid. By using this process, the amount of the pretreatment liquid used can be reduced, the amount of energy required for heating and drying the pretreatment liquid and the color material ink can be reduced, and the pretreatment liquid and the color can be reduced by a simple heating process. The material ink can be dried. When the pretreatment liquid is applied to the entire recording surface, it is preferable to apply the pretreatment liquid by a roller coating method. When the pretreatment liquid is selectively applied, it is preferable to apply the pretreatment liquid by an inkjet method. By applying the pretreatment liquid by the inkjet method, it is possible to accurately apply the pretreatment liquid to the place where the color material ink to be applied after the pretreatment liquid is applied. Moreover, it can provide only with respect to the part for which a pre-processing liquid is required by providing a pre-processing liquid with an inkjet system. Thereby, the printing method which reduced the usage-amount of the pretreatment liquid can be provided. In addition, since a uniform pretreatment layer can be formed by using the ink jet pretreatment liquid application method as compared with the roller coating method, it is possible to further suppress a decrease in the glossiness of the image.

<Non-absorbent recording medium>
A non-absorbent recording medium is a recording medium having a surface with low water permeability and low absorbency, including a material that does not open to the outside even if there are many cavities inside, more quantitatively, A recording medium having a water absorption of 10 mL / m ² or less from the start of contact to 30 msec ^1/2 in the Bristow method. The shape of the non-absorbent recording medium is preferably, for example, a film shape, a sheet shape, or a board shape, but is not limited thereto.
Examples of the material constituting the non-absorbent recording medium include materials selected from polyethylene terephthalate, polyvinyl chloride, polyurethane, polycarbonate, polyethylene, polypropylene, and the like, and materials obtained by combining a plurality of these materials. Among these, the non-absorbent recording medium containing polyvinyl chloride is preferable in the area to which the pretreatment liquid is applied, and the printable area of the non-absorbing recording medium or the entire non-absorbing recording medium contains polyvinyl chloride. It is more preferable.
Further, the non-absorbing recording medium preferably contains a plasticizer, and more preferably contains a plasticizer when the material constituting the non-absorbing recording medium is polyvinyl chloride.

<Pretreatment liquid>
The pretreatment liquid contains a water-insoluble plasticizer. In addition, for example, an organic solvent, oils, resins, stabilizers, and other additives such as a surfactant may be included for the purpose of adjusting the concentration and viscosity of the pretreatment liquid.
Moreover, it is preferable that a pretreatment liquid does not contain water substantially. “Substantially free of water” means that the content of water in the pretreatment liquid is 1.0% by mass or less, preferably 0.5% by mass or less, and 0.1% by mass. % Or less is more preferable, and it is still more preferable not to contain. Since the pretreatment liquid does not substantially contain water, when the color material ink containing water is applied on the pretreatment layer, the color material ink is prevented from mixing and penetrating into the pretreatment layer. As a result, the color material ink spreads on the pretreatment layer to form uniform and smooth dots (color material ink layer), and the decrease in the glossiness of the image is further suppressed.

(Water-insoluble plasticizer)
The water-insoluble plasticizer is an additive that improves the flexibility and weather resistance of the non-absorbent recording medium by being applied to a thermoplastic resin or the like constituting the non-absorbable recording medium. In the present embodiment, “water-insoluble” refers to a plasticizer having a solubility in water at 25 ° C. of less than 0.01 mg / L. In this embodiment, a water-insoluble plasticizer is contained in a pretreatment liquid and applied to a non-absorbent recording medium, and a color material ink is applied on the pretreatment layer that is a liquid layer. As a result, compared to the case where a non-absorbable recording medium prepared by applying a water-insoluble plasticizer and dried is prepared in advance and the color material ink is applied, it is possible to suppress a decrease in the glossiness of the image. can get.

  Examples of water-insoluble plasticizers include adipic acid esters such as di-2-ethylhexyl adipate (DOA) and diisononyl adipate (DINA), di-2-ethylhexyl phthalate (DOP), and diisononyl phthalate (DINP). Phthalic acid esters such as di-2-ethylhexyl fumarate (DOF), trimellitic acid esters such as trimellitic acid tri-2-ethylhexyl (TOTM), etc. Di-2-ethylhexyl adipate (DOA) and diisononyl phthalate (DINP) are preferred. When applying a pretreatment liquid containing these water-insoluble plasticizers to a non-absorbent recording medium containing a plasticizer, the compatibility between the pretreatment liquid and the non-absorbent recording medium is improved, and a uniform pretreatment layer is obtained. Can be provided, which is preferable. Thereby, the fall of the glossiness of an image can be suppressed more. In addition, it is preferable that the non-absorbent recording medium is polyvinyl chloride and contains a plasticizer because compatibility is improved.

  Further, the content of the water-insoluble plasticizer is preferably 20% by mass or more and 100% by mass or less, more preferably 50% by mass or more and 100% by mass or less, and more preferably 60% by mass or more with respect to the pretreatment liquid. More preferably, it is 100 mass% or less, and it is especially preferable that it is 70 mass% or more and 100 mass% or less. When the content of the water-insoluble plasticizer is 20% by mass or more and 100% by mass or less, it is suppressed that the dots formed by the color material ink on the non-absorbent recording medium are uneven due to heat drying, A reduction in the glossiness of the image formed by these dots is suppressed.

(Organic solvent)
Examples of the organic solvent include monovalent or divalent alcohols having 4 or more carbon atoms such as 2-methyl-1-propanol, 1,5-pentanediol, and 2-ethylhexanol, ethyl n-octanoate, And higher fatty acid esters having 8 or more carbon atoms such as ethyl laurate.

(Oil)
Examples of oils include dimethyl silicone oil and methylphenyl silicone oil. When the pretreatment liquid is ejected by the ink jet method, it is preferable to use a silicone oil having a viscosity at 25 ° C. of 50 mPa · s or less.

(resin)
The type of resin contained in the pretreatment liquid is not particularly limited and can be appropriately selected according to the purpose. For example, urethane resin, polyester resin, acrylic resin, vinyl acetate resin, styrene resin, Examples thereof include butadiene resins, styrene-butadiene resins, vinyl chloride resins, acrylic styrene resins, and acrylic silicone resins.
Moreover, you may use the resin particle which consists of these resin. As a resin particle, what was synthesize | combined suitably may be used and a commercial item may be used. Moreover, these may be used individually by 1 type, or may be used in combination of 2 or more types of resin particles.

(Stabilizer)
The stabilizer is added for the purpose of suppressing decomposition of a non-absorbing recording medium such as polyvinyl chloride and the change of hue due to double bonds at high temperatures. The stabilizer is not particularly limited, and examples thereof include calcium stearate and zinc stearate. The content of the stabilizer is preferably 0.05% by mass or more and 2.00% by mass or less with respect to the content of the water-insoluble plasticizer.

(Additive)
If necessary, a surfactant, an antifoaming agent, an antiseptic / antifungal agent, an antirust agent, a pH adjuster, and the like may be added to the pretreatment liquid.

<< Coloring material ink application process >>
The color material ink application step is a step of applying a color material ink containing a color material and water to a pretreatment layer that is a liquid phase formed by the applied pretreatment liquid after the pretreatment liquid application step. It is. The coloring material ink on the non-absorbing recording medium is not applied directly to the non-absorbing recording medium, but is applied to the pretreatment layer formed on the non-absorbing recording medium. The dots formed by the above are suppressed from being uneven as a result of heating and drying, and the decrease in the glossiness of the image formed by these dots is suppressed.

  Moreover, since it is preferable that a color material ink provision process is applied to the pretreatment layer which is in the state of a uniform liquid phase, it is preferable that it is performed without a space | interval after a pretreatment liquid provision process. Specifically, it is preferable that the color material ink application step is executed within 60 seconds after the pretreatment liquid application step is executed. By executing the color material ink application step while the pretreatment layer is in a uniform liquid layer state, uniform and smooth dots (color material ink layer) can be formed, and the glossiness of the image is reduced. More suppressed.

  In this embodiment, since it is preferable that the color material ink is applied to the pretreatment layer that is in the liquid layer state, the color material ink is applied by an inkjet method that can apply the color material ink in a non-contact manner. Is preferred.

<Color material ink>
The color material ink includes a color material and water. Moreover, other additives, such as an organic solvent, a pigment, a resin particle, and surfactant, may be included as needed.

(Organic solvent)
The organic solvent used in the present embodiment is not particularly limited, and a water-soluble organic solvent can be used. Examples thereof include ethers such as polyhydric alcohols, polyhydric alcohol alkyl ethers and polyhydric alcohol aryl ethers, nitrogen-containing heterocyclic compounds, amides, amines and sulfur-containing compounds.
Specific examples of the polyhydric alcohol include, for example, ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, and 1,4-butane. Diol, 2,3-butanediol, 3-methyl-1,3-butanediol, triethylene glycol, polyethylene glycol, polypropylene glycol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol 2,4-pentanediol, 1,5-pentanediol, 1,2-hexanediol, 1,6-hexanediol, 1,3-hexanediol, 2,5-hexanediol, 1,5-hexanediol, Glycerin, 1,2,6-hexanetriol, 2-ethyl-1,3- Hexanediol, ethyl-1,2,4-butanetriol, 1,2,3-butanetriol, 2,2,4-trimethyl-1,3-pentanediol, petriol, and the like.
Examples of the polyhydric alcohol alkyl ethers include ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, propylene glycol monoethyl ether and the like.
Examples of polyhydric alcohol aryl ethers include ethylene glycol monophenyl ether and ethylene glycol monobenzyl ether.
Examples of nitrogen-containing heterocyclic compounds include 2-pyrrolidone, N-methyl-2-pyrrolidone, N-hydroxyethyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, ε-caprolactam, and γ-butyrolactone. Can be mentioned.
Examples of amides include formamide, N-methylformamide, N, N-dimethylformamide, 3-methoxy-N, N-dimethylpropionamide, 3-butoxy-N, N-dimethylpropionamide and the like.
Examples of amines include monoethanolamine, diethanolamine, and triethylamine.
Examples of sulfur-containing compounds include dimethyl sulfoxide, sulfolane, thiodiethanol and the like.
Examples of other organic solvents include propylene carbonate and ethylene carbonate.
In addition to functioning as a wetting agent, it is preferable to use an organic solvent having a boiling point of 250 ° C. or lower because good drying properties can be obtained.

As the organic solvent, a polyol compound having 8 or more carbon atoms and a glycol ether compound are also preferably used. Specific examples of the polyol compound having 8 or more carbon atoms include 2-ethyl-1,3-hexanediol, 2,2,4-trimethyl-1,3-pentanediol, and the like.
Specific examples of glycol ether compounds include polyhydric alcohol alkyls such as ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, and propylene glycol monoethyl ether. Examples of ethers include polyhydric alcohol aryl ethers such as ethylene glycol monophenyl ether and ethylene glycol monobenzyl ether.

  The content of the organic solvent in the color material ink is not particularly limited and can be appropriately selected according to the purpose. However, from the viewpoint of the drying property and ejection reliability of the color material ink, the content is 10% by mass or more and 60% by mass. The following is preferable, and 20 mass% or more and 60 mass% or less are more preferable.

(water)
The color material ink is preferably an aqueous ink containing water. The content of water in the color material ink is not particularly limited and may be appropriately selected according to the purpose. However, from the viewpoint of the drying property and ejection reliability of the color material ink, the content is from 10% by mass to 90% by mass. Preferably, 20 mass% or more and 60 mass% or less are more preferable.

(Color material)
The color material is not particularly limited, and pigments and dyes can be used.
An inorganic pigment or an organic pigment can be used as the pigment. These may be used alone or in combination of two or more. A mixed crystal may be used as the pigment.
As the pigment, for example, a black pigment, a yellow pigment, a magenta pigment, a cyan pigment, a white pigment, a green pigment, an orange pigment, a glossy pigment such as gold or silver, a metallic pigment, or the like can be used.
Carbon black produced by known methods such as contact method, furnace method, thermal method in addition to titanium oxide, iron oxide, calcium carbonate, barium sulfate, aluminum hydroxide, barium yellow, cadmium red, chrome yellow as inorganic pigments Can be used.
Organic pigments include azo pigments, polycyclic pigments (for example, phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, indigo pigments, thioindigo pigments, isoindolinone pigments, and quinophthalone pigments). Dye chelates (for example, basic dye type chelates, acidic dye type chelates), nitro pigments, nitroso pigments, aniline black, and the like can be used. Of these pigments, those having good affinity with the solvent are preferably used. In addition, resin hollow particles and inorganic hollow particles can also be used.
Specific examples of pigments include black for carbon black (CI pigment black 7) such as furnace black, lamp black, acetylene black, channel black, or copper, iron (CI pigment black 11). And metal pigments such as titanium oxide, and organic pigments such as aniline black (CI Pigment Black 1).
Further, for color use, C.I. I. Pigment Yellow 1, 3, 12, 13, 14, 17, 24, 34, 35, 37, 42 (yellow iron oxide), 53, 55, 74, 81, 83, 95, 97, 98, 100, 101, 104 , 108, 109, 110, 117, 120, 138, 150, 153, 155, 180, 185, 213, C.I. I. Pigment orange 5, 13, 16, 17, 36, 43, 51, C.I. I. Pigment Red 1, 2, 3, 5, 17, 22, 23, 31, 38, 48: 2, 48: 2 (Permanent Red 2B (Ca)), 48: 3, 48: 4, 49: 1, 52: 2, 53: 1, 57: 1 (Brilliant Carmine 6B), 60: 1, 63: 1, 63: 2, 64: 1, 81, 83, 88, 101 (Bengara), 104, 105, 106, 108 ( Cadmium red), 112, 114, 122 (quinacridone magenta), 123, 146, 149, 166, 168, 170, 172, 177, 178, 179, 184, 185, 190, 193, 202, 207, 208, 209, 213, 219, 224, 254, 264, C.I. I. Pigment violet 1 (rhodamine lake), 3, 5: 1, 16, 19, 23, 38, C.I. I. Pigment Blue 1, 2, 15 (phthalocyanine blue), 15: 1, 15: 2, 15: 3, 15: 4 (phthalocyanine blue), 16, 17: 1, 56, 60, 63, C.I. I. Pigment Green 1, 4, 7, 8, 10, 17, 18, 36, etc.
The dye is not particularly limited, and an acid dye, a direct dye, a reactive dye, and a basic dye can be used. One kind may be used alone, or two or more kinds may be used in combination.
Examples of the dye include C.I. I. Acid Yellow 17, 23, 42, 44, 79, 142, C.I. I. Acid Red 52, 80, 82, 249, 254, 289, C.I. I. Acid Blue 9, 45, 249, C.I. I. Acid Black 1, 2, 24, 94, C.I. I. Food Black 1, 2, C.I. I. Direct Yellow 1, 12, 24, 33, 50, 55, 58, 86, 132, 142, 144, 173, C.I. I. Direct Red 1, 4, 9, 80, 81, 225, 227, C.I. I. Direct Blue 1, 2, 15, 71, 86, 87, 98, 165, 199, 202, C.I. I. Directed Black 19, 38, 51, 71, 154, 168, 171, 195, C.I. I. Reactive Red 14, 32, 55, 79, 249, C.I. I. Reactive black 3, 4, and 35 are mentioned.

  The content of the color material in the color material ink is preferably 0.1% by mass or more and 15% by mass or less, more preferably 1% by mass or more and 10% by mass, from the viewpoints of improvement in image density, good fixability and ejection stability. It is below mass%.

As a method of obtaining a color material ink by dispersing a pigment, a method of introducing a hydrophilic functional group into the pigment to obtain a self-dispersing pigment, a method of coating and dispersing the surface of the pigment with a resin, and using a dispersant And a method of dispersing.
As a method of introducing a hydrophilic functional group into a pigment to obtain a self-dispersing pigment, for example, a method of making it dispersible in water by adding a functional group such as a sulfone group or a carboxyl group to the pigment (for example, carbon) Is mentioned.
As a method for coating the surface of the pigment with a resin and dispersing it, a method in which the pigment is included in microcapsules and dispersible in water can be mentioned. This can be paraphrased as a resin-coated pigment. In this case, it is not necessary for the pigment blended in the color material ink to be coated with the resin, and within the range where the effect of the present embodiment is not impaired, the pigment that is not coated or the partially coated pigment is the color material. It may be dispersed in the ink.
Examples of the method of dispersing using a dispersant include a method of dispersing using a known low-molecular type dispersant or high-molecular type dispersant represented by a surfactant.
As the dispersant, for example, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, or the like can be used depending on the pigment.
As the dispersant, RT-100 (nonionic surfactant) manufactured by Takemoto Yushi Co., Ltd. and Naphthalenesulfonic acid Na formalin condensate can also be suitably used as the dispersant.
A dispersing agent may be used individually by 1 type, or may use 2 or more types together.

(Pigment dispersion)
It is possible to obtain a color material ink by mixing a material such as water or an organic solvent with the pigment. It is also possible to produce a color material ink by mixing a pigment, other water, a dispersant, and the like into a pigment dispersion and mixing a material such as water or an organic solvent.
The pigment dispersion is obtained by mixing and dispersing water, a pigment, a pigment dispersant, and other components as necessary, and adjusting the particle size. For dispersion, a disperser is preferably used.
The particle size of the pigment in the pigment dispersion is not particularly limited, but the maximum frequency is 20 nm or more in terms of maximum number because the pigment dispersion stability is good and the image quality such as ejection stability and image density is also high. 500 nm or less is preferable and 20 nm or more and 150 nm or less are more preferable. The particle size of the pigment can be measured using a particle size analyzer (Nanotrack Wave-UT151, manufactured by Microtrack Bell Co., Ltd.).
The content of the pigment in the pigment dispersion is not particularly limited and may be appropriately selected depending on the intended purpose. However, from the viewpoint of obtaining good ejection stability and increasing the image density, 0.1% by mass The content is preferably 50% by mass or less and more preferably 0.1% by mass or more and 30% by mass or less.
The pigment dispersion is preferably degassed by filtering coarse particles with a filter, a centrifugal separator or the like, if necessary.

(resin)
The type of resin contained in the color material ink is not particularly limited and can be appropriately selected according to the purpose. For example, polyurethane resin, polyester resin, acrylic resin, vinyl acetate resin, styrene resin, Examples thereof include butadiene resins, styrene-butadiene resins, vinyl chloride resins, acrylic styrene resins, and acrylic silicone resins.
Resin particles made of these resins may be used. It is possible to obtain a color material ink by mixing resin particles with a material such as a color material or an organic solvent in a resin emulsion state in which water is used as a dispersion medium. As a resin particle, what was synthesize | combined suitably may be used and a commercial item may be used. Moreover, these may be used individually by 1 type, or may be used in combination of 2 or more types of resin particles. In this embodiment, among these, it is preferable to use polyurethane resin particles.

The volume average particle diameter of the resin particles is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 10 nm or more and 1,000 nm or less from the viewpoint of obtaining good fixability and high image hardness. It is more preferably 200 nm or less and particularly preferably 10 nm to 100 nm.
The volume average particle diameter can be measured using, for example, a particle size analyzer (Nanotrack Wave-UT151, manufactured by Microtrack Bell Co., Ltd.).

  The resin content is not particularly limited and may be appropriately selected depending on the intended purpose. However, from the viewpoint of fixability and storage stability of the color material ink, it is 1% by mass or more based on the total amount of the color material ink. 30 mass% or less is preferable, and 5 mass% or more and 20 mass% or less are more preferable. When polyurethane resin particles are used as the resin, it is preferably contained in an amount of 1.0% by mass or more and 15.0% by mass or less based on the total amount of the color material ink. By being in this range, the fixing property of the color material image formed by applying the color material ink and drying it to the non-absorbing recording medium is improved.

  The particle size of the solid content in the color material ink is not particularly limited and may be appropriately selected depending on the purpose. From the viewpoint of improving image quality such as ejection stability and image density, the maximum frequency of the particle size of the solid content in the color ink is preferably 20 nm or more and 1000 nm or less, more preferably 20 nm or more and 150 nm or less in terms of the maximum number. The solid content includes resin particles, pigment particles, and the like. The particle size can be measured using a particle size analyzer (Nanotrack Wave-UT151, manufactured by Microtrack Bell Co., Ltd.).

(Additive)
A surfactant, an antifoaming agent, an antiseptic / antifungal agent, a rust inhibitor, a pH adjuster, and the like may be added to the color material ink as necessary.

<< Transparent ink application process >>
The transparent ink applying step is a step of applying a transparent ink that contains water but does not contain a coloring material to the non-absorbent recording medium. In the case where the transparent ink is applied “to the non-absorbent recording medium”, for example, when the transparent ink is applied directly to the non-absorbent recording medium, the transparent ink is pretreated on the non-absorbent recording medium. The case where it grants to a layer is included. Moreover, the timing for executing the transparent ink application step is not particularly limited, but is preferably the same as the color material ink application step or after the color material ink application step, and more preferably at the same time. The case where the transparent ink application process is performed simultaneously with the color material ink application process includes, for example, the case where the transparent ink application and the color material ink application are alternately performed.

  The transparent image region formed by applying the transparent ink is preferably adjacent to the color material image region formed by applying the color material ink. Since the color material ink applied on the pretreatment layer is difficult to mix with the pretreatment liquid layer, the color material ink tends to wet and spread on the pretreatment layer until the dots come into contact with each other depending on the amount of the color material ink applied. Therefore, the spreading of the color material ink that forms the boundary portion of the color material image region is suppressed by the transparent ink, thereby suppressing bleeding at the boundary portion.

<Transparent ink>
The transparent ink contains water and does not contain a color material. Moreover, other additives, such as an organic solvent, a pigment, a resin particle, and surfactant, may be included as needed. The various components that can be used in the transparent ink are the same as the various components that are used in the color material ink, and thus the description thereof is omitted. The physical properties such as viscosity and surface tension of the transparent ink are preferably the same as those of the color material ink.

<< Heating process >>
The heating process is performed after the pretreatment liquid application process and before the color material ink application process, at the time of the color material ink application process, and at least one timing selected after the color material ink application process. Is a step of heating the pretreatment liquid, the color material ink, the transparent ink, or the non-absorbent recording medium applied to the ink. The heating step is preferably performed at all timings after the pretreatment liquid application step and before the color material ink application step, at the time of the color material ink application step, and after the color material ink application step. The heating step is preferably a step of drying by heating the pretreatment liquid, color material ink, or transparent ink applied to the non-absorbent recording medium, but depending on the timing of the heating step, May be a heating process for the purpose of heating (preheating) the non-absorbent recording medium itself. For example, the heating process that is performed after the pretreatment liquid application process and before the color material ink application process does not completely dry the pretreatment liquid applied to the nonabsorbent recording medium. This is a process aimed at heating the medium itself. As a result, the color material ink applied onto the pretreatment layer that is a liquid layer wets and spreads on the pretreatment layer, and can form uniform and smooth dots (color material ink layer). Is suppressed.

  In addition, the heating step includes, for example, a step of blowing warm air toward the non-absorbent recording medium, a heating roller or a flat heater from the surface to which the pretreatment liquid and color material ink of the non-absorbent recording medium are not applied. The process of heating etc. are mentioned.

[Container set]
The storage container set according to the present embodiment is a set having a pretreatment liquid storage container that stores the pretreatment liquid and a color material ink storage container that stores the color material ink. The pretreatment liquid storage container and the color material ink storage container included in the storage container set may be one type or a plurality of types. The storage container set may be a set including a transparent ink storage container that stores the transparent ink, if necessary.
The pretreatment liquid storage container and the color material ink storage container can be appropriately selected in shape, structure, size, material, etc. according to the purpose, for example, a storage part formed of an aluminum laminate film, a resin film, or the like And a large-capacity tank are suitable.

[Printer]
The printing apparatus includes a pretreatment liquid application unit and a color material ink application unit. Moreover, it is preferable that other means, such as a transparent ink application | coating means and a heating means, are included as needed.

<< First Embodiment of Printing Apparatus >>
The printing apparatus according to the first embodiment will be described with reference to FIGS. FIG. 1 is an explanatory side view of the printing apparatus, FIG. 2 is an explanatory plan view of an essential part of the printing apparatus, and FIG. 3 is an explanatory plan view of a head.

  This printing apparatus is a serial type inkjet recording apparatus, and a printing unit (image forming unit) 101 that prints on a printing medium (hereinafter referred to as “medium”) 2 as a printing material, and a conveyance unit 102 that conveys the medium 2. A roll storage unit 103 for storing the medium 2, a roll winding unit 104 for winding the medium 2, and the like.

  In this apparatus, a roll body 1 in which a medium 2 which is an example of a non-absorbent recording medium is wound in a roll shape is used. The roll body 1 is stored in the roll storage unit 103, and the medium 2 is pulled out from the roll body 1 by the conveying roller pair 31 and sent out.

  As illustrated in FIG. 2, the printing unit 101 that also serves as an example of a pretreatment liquid application unit, an example of a color material ink application unit, and an example of a transparent ink application unit includes a plurality of nozzle arrays that eject liquid as liquid ejection units. A liquid discharge head (hereinafter, also referred to as “head”) 11 having the above is mounted on the carriage 12. The carriage 12 is held by a guide member 13 so as to be able to reciprocate in the main scanning direction (in FIG. 1, the direction perpendicular to the paper surface).

  Here, as shown in FIG. 3, the head 11 has a plurality of nozzle arrays Na to Ne in which a plurality (m) of nozzles n1 to nm for discharging a liquid are arranged, and the nozzle arrangement direction is set in the medium transport direction ( It is mounted on the carriage 12 in the sub-scanning direction).

  The nozzle rows Na to Nc of the head 11 include, for example, color material ink nozzle rows used for discharging color material inks such as black (K), yellow (Y), magenta (M), and cyan (C). The nozzle row Nd of the head 11 includes, for example, a transparent ink nozzle row used for discharging transparent ink. The nozzle row Ne of the head 11 includes, for example, a pretreatment liquid nozzle row used for discharging the pretreatment liquid. In this example, one head has five nozzle rows Na to Ne, but a plurality of heads may have a plurality of nozzle rows.

  The conveyance unit 102 includes a conveyance roller 21 and a counter roller 22 that are conveyance units on the upstream side of the printing unit 101 in the medium conveyance direction (arrow A direction: sub-scanning direction), and conveys the medium 2 therebetween. Further, a platen member 25 that guides the medium 2 is disposed so as to face the printing unit 101.

  The roll take-up unit 104 includes a take-up roll 41 that takes up the medium 2.

  A pre-heater 51, a print heater 52, and a post-heater 53, which are examples of heating means, are arranged along the conveyance direction of the medium 2.

  The pre-heater 51 is a heater that heats the medium 2 before the printing area by the printing unit 101. The print heater 52 is a heater that heats the medium 2 in a printing area by the printing unit 101. The post heater 53 is a heater that heats the medium 2 after printing by the printing unit 101. As the pre-heater 51, the print heater 52, and the post heater 53, an electric heater using ceramic or nichrome wire can be used.

  A hot air fan 54 that blows hot air onto the medium 2 is provided on the downstream side of the post heater 53. The hot air fan 54 applies the hot air directly to the liquid on the printing surface to reduce the humidity of the atmosphere and dry it completely.

  Since these heaters 51 to 53 and the warm air fan 54 are mounted, it is possible to print on a non-penetrable medium in which a liquid such as vinyl chloride, polyethylene terephthalate (PET), or acrylic does not soak.

<< Second Embodiment of Printing Apparatus >>
A printing apparatus according to the second embodiment will be described with reference to FIGS. 4 is an explanatory side view of the printing apparatus, FIG. 5 is an explanatory plan view of the main part of the printing apparatus, and FIG. 6 is an explanatory plan view of the head.

  This printing apparatus is a serial type ink jet recording apparatus, and includes a printing unit (image forming unit) 1101 that prints on a medium 2 as a printing material, a conveyance unit 102 that conveys the medium 2, and a roll storage unit 103 that accommodates the medium 2. A roll winding unit 104 for winding the medium 2, a pretreatment liquid application unit 80 for applying the pretreatment liquid to the medium 2, and the like. Among these configurations, the description of the configuration common to the printing apparatus according to the first embodiment is omitted.

  This apparatus has a pretreatment liquid application unit 80 which is an example of a pretreatment liquid application unit, and employs a roller application mechanism. The pretreatment liquid is stored in the pretreatment liquid storage tank 81, pumped up to the roller surface by the pumping roller 83, and transferred to the film pressure control roller 82. Subsequently, the pretreatment liquid transferred to the application roller 84 is transferred to the medium 2 passing between the application counter roller 85 and applied.

  As shown in FIG. 5, the printing unit 1101 that also serves as an example of a color material ink application unit and an example of a transparent ink application unit, as a liquid ejection unit, has a liquid ejection head (hereinafter referred to as a “liquid ejection head”) that has a plurality of nozzle rows that eject liquid. 111 is also mounted on the carriage 112. The carriage 112 is held by a guide member 113 so as to be capable of reciprocating in the main scanning direction (in FIG. 4, the direction perpendicular to the paper surface).

  Here, as shown in FIG. 6, the head 111 has a plurality of nozzle rows Ra to Re in which a plurality (m) of nozzles r1 to rm that discharge liquid are arranged, and the nozzle arrangement direction is set in the medium transport direction ( It is mounted on the carriage 112 in the sub-scanning direction).

  The nozzle rows Na to Nd of the head 111 include, for example, color material ink nozzle rows used for discharging color material inks such as black (K), yellow (Y), magenta (M), and cyan (C). The nozzle row Ne of the head 11 includes, for example, a transparent ink nozzle row used for discharging transparent ink. In this example, one head has five nozzle rows Na to Ne, but a plurality of heads may have a plurality of nozzle rows.

[Printed matter]
The printed matter of the present embodiment includes a non-absorbent recording medium, a water-insoluble plasticizer-containing layer formed on the non-absorbent recording medium and containing a water-insoluble plasticizer, and a colorant formed on the water-insoluble plasticizer-containing layer. And a color material-containing layer containing The printed matter is formed by drying the non-absorbent recording medium after the pretreatment liquid application step and the color material ink application step. By being formed through the pretreatment liquid application step and the color material ink application step, it is possible to obtain a printed matter in which the decrease in the glossiness of the image is suppressed. Specifically, the printed material has a 20-degree glossiness of 30 or more on the surface of the color material-containing layer, and is preferably a printed material of 40 or more. The color material-containing layer is formed by a printing method including the color material ink application step. The color material ink application condition is that the discharge amount per color material ink is 22 pl and the resolution is 600 ×. It is preferably 600 dpi, and the amount of the color material ink in an undried state on the non-absorbent recording medium is preferably 12.0 g / m ² .

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

<Preparation of pretreatment liquid>
(Preparation of pretreatment liquid 1)
After the following materials were mixed and stirred, the pretreatment liquid 1 was obtained by filtering with a 0.2 μm polypropylene filter.
・ Diisononyl phthalate (DINP) 99.7% by mass
・ Calcium stearate 0.2% by mass
・ Zinc stearate 0.1% by mass

(Preparation of pretreatment liquid 2)
The combination and addition amount of each material used in the preparation of the pretreatment liquid 1 were changed to the combinations and addition amounts shown in Table 1 below, and a pretreatment liquid 2 was produced. In addition, the unit of each number in Table 1 is “mass%”.

In Table 1 above, the trade names of the materials and the names of the manufacturing companies are as follows.
・ Methylphenyl silicone oil (trade name: KF-56A, manufactured by Shin-Etsu Silicone)

<Adjustment of magenta pigment dispersion>
The following prescription mixture was premixed and then circulated and dispersed for 7 hours in a disk-type bead mill (Shinmaru Enterprises KDL type, media: 0.3 mm diameter zirconia ball used) to obtain a magenta pigment dispersion.
Pigment Red 122 (trade name: Toner Magenta EO02, manufactured by Clariant Japan Co., Ltd.) 15.0% by mass
Anionic surfactant (Pionin A-51-B, Takemoto Yushi Co., Ltd.) 2.0% by mass
・ Ion exchange water 83.0% by mass

<Color material ink adjustment>
The following materials were mixed and stirred, and then filtered through a 0.2 μm polypropylene filter to obtain a color material ink (magenta ink). In addition, Table 2 below also shows combinations and addition amounts of the materials used in the color material ink adjustment. In addition, the unit of each number in Table 2 is “mass%”.
-Magenta pigment dispersion 20.0% by mass
-Polyurethane resin particles (trade name: Superflex 150, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 8.0% by mass
・ 1,2-propanediol 10.0% by mass
・ 3-Methoxy-N, N-dimethylpropionamide 10.0% by mass
・ 4.0% by mass of 3-methoxy-3-methylbutanol
・ 3.0% by mass of 2-ethyl-1,3-hexanediol
-Surfactant (trade name: SAG002, manufactured by Nissin Chemical Industry Co., Ltd.) 3.0% by mass
-Antiseptic mold agent (trade name: Proxel LV) 0.05% by mass
・ Antirust agent (trade name: BT-120, manufactured by Johoku Chemical Industry Co., Ltd.) 0.05% by mass
-Antifoaming agent (trade name: AD01, manufactured by Nissin Chemical Industry Co., Ltd.) 0.1% by mass
・ High purity water 41.8% by mass

<Adjustment of transparent ink>
The following materials were mixed and stirred, and then filtered through a 0.2 μm polypropylene filter to obtain a transparent ink. In addition, Table 2 below shows combinations and addition amounts of the respective materials used in the adjustment of the transparent ink. In addition, the unit of each number in Table 2 is “mass%”.
・ Polyurethane resin particles (trade name: Superflex 150, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 12.0% by mass
・ 1,2-propanediol 20.0% by mass
・ 3-Methoxy-N, N-dimethylpropionamide 10.0% by mass
・ 3-Methoxy-3-methylbutanol 7.0% by mass
・ 2-ethyl-1,3-hexanediol 6.0% by mass
-Surfactant (trade name: SAG002, manufactured by Nissin Chemical Industry Co., Ltd.) 3.0% by mass
-Antiseptic mold agent (trade name: Proxel LV) 0.05% by mass
・ Antirust agent (trade name: BT-120, manufactured by Johoku Chemical Industry Co., Ltd.) 0.05% by mass
-Antifoaming agent (trade name: AD01, manufactured by Nissin Chemical Industry Co., Ltd.) 0.1% by mass
・ High purity water 41.8% by mass

(Example 1)
The obtained pretreatment liquid 1 is filled into a pretreatment liquid storage container, the color material ink is filled into the color material ink storage container, and a storage container set that is a set of the pretreatment liquid storage container and the color material ink storage container is created. did. Next, the pretreatment liquid container and the color material ink container were mounted on the ink jet printer shown in FIG. And for the polyethylene terephthalate film (E-5100, manufactured by Toyobo Co., Ltd., hereinafter also referred to as “PET film”), through the following pretreatment liquid application process, color material ink application process, and heating process, A solid image of 50 mm square and a character image with a font size of 8 pt were obtained.

-Pretreatment liquid application process-
As shown in FIG. 4, the pretreatment liquid was applied to the entire printing surface of the film by roller coating. The amount of the pretreatment liquid applied to the film was adjusted so that the amount of the undried pretreatment liquid on the film was 1.0 g / m ² .

-Color material ink application process-
As shown in FIG. 4, the color material ink was applied to the surface of the film to which the pretreatment liquid was applied by an inkjet method. The color material ink applying means was adjusted so that the discharge amount per drop of the color material ink was 22 pl and the resolution was 600 × 600 dpi. Further, the amount of the color material ink applied to the film was adjusted so that the amount of the color material ink in an undried state on the film was 12.0 g / m ² . In addition, bidirectional printing, two passes, and 1/4 interlace printing were performed.

-Heating process-
The preheater and print heater shown in FIG. 4 were set to 60 ° C. Moreover, the post heater and the warm air fan were set to 70 ° C.
Further, the pretreatment layer on the film at the time of the color material ink application step was in a uniform liquid layer state by visual observation.

(Example 2)
The obtained pretreatment liquid 2 is filled into a pretreatment liquid storage container, and the color material ink is filled into the color material ink storage container, thereby creating a storage container set that is a set of the pretreatment liquid storage container and the color material ink storage container. did. Next, the pretreatment liquid storage container and the color material ink storage container were respectively filled in the ink jet printer shown in FIG. And, for the polyvinyl chloride film (there is an adhesive on the back surface, GIY-11Z5, manufactured by Lintec Corporation, hereinafter also referred to as “PVC film”), the following pretreatment liquid application process, color material ink application process, And a heating process, a solid image of 50 mm square and a character image with a font size of 8 pt were obtained.

-Pretreatment liquid application process-
As shown in FIG. 1, the pretreatment liquid was applied to the region of the film to which the color material ink was applied by an inkjet method. The pretreatment liquid applying means was adjusted so that the discharge amount per drop of the pretreatment liquid was 15 pl and the resolution was 150 × 150 dpi. Moreover, the application amount with respect to the film of the pretreatment liquid was adjusted so that the amount of the undried pretreatment liquid on the film was 0.5 g / m ² .

-Color material ink application process-
As shown in FIG. 1, the color material ink was applied to the surface of the film to which the pretreatment liquid was applied by an inkjet method. The color material ink applying means was adjusted so that the discharge amount per drop of the color material ink was 22 pl and the resolution was 600 × 600 dpi. Further, the amount of the color material ink applied to the film was adjusted so that the amount of the color material ink in an undried state on the film was 12.0 g / m ² . In addition, bidirectional printing, two passes, and 1/4 interlace printing were performed.

-Heating process-
The preheater and print heater shown in FIG. 1 were set to 60 ° C. Moreover, the post heater and the warm air fan were set to 70 ° C.
Further, the pretreatment layer on the film at the time of the color material ink application step was in a state of a uniform liquid layer when visually observed.

(Example 3)
The obtained pretreatment liquid 1 is filled in a pretreatment liquid storage container, a color material ink is filled in a color material ink storage container, a transparent ink is filled in a transparent ink storage container, and the pretreatment liquid storage container and the color material ink are filled. A storage container set, which is a set of a storage container and a transparent ink storage container, was created. Next, the pretreatment liquid container, the color material ink container, and the transparent ink container were filled in the ink jet printer shown in FIG. Then, the PVC film has a solid image and a font size of 50 mm square through the pretreatment liquid application process, the color material ink application process, the heating process, and the next transparent ink application process similar to those in Example 1. A character image of 8 pt was obtained.

-Transparent ink application process-
As shown in FIG. 4, the transparent image region formed by applying the transparent ink to the surface of the film to which the pretreatment liquid has been applied is the color material image region formed by applying the color material ink. Transparent ink was applied by an inkjet method so as to be adjacent. The transparent ink applying means was adjusted so that the ejection amount per drop of the transparent ink was 22 pl and the resolution was 600 × 600 dpi. The amount of the transparent ink applied to the film was adjusted so that the amount of the undried transparent ink on the film was 12.0 g / m ² . In addition, bidirectional printing, two passes, and 1/4 interlace printing were performed.

(Example 4)
The obtained pretreatment liquid 2 is filled in a pretreatment liquid storage container, a color material ink is filled in a color material ink storage container, a transparent ink is filled in a transparent ink storage container, and the pretreatment liquid storage container and the color material ink are filled. A storage container set, which is a set of a storage container and a transparent ink storage container, was created. Next, the pretreatment liquid container, the color material ink container, and the transparent ink container were filled in the ink jet printer shown in FIG. Then, the PVC film has a solid image and a font size of 50 mm square after undergoing the same pretreatment liquid application process, color material ink application process, and heating process as in Example 2 and the next transparent ink application process. A character image of 8 pt was obtained.

-Transparent ink application process-
As shown in FIG. 1, the transparent image area formed by applying the transparent ink to the surface of the film to which the pretreatment liquid has been applied is the color material image area formed by applying the color material ink. Transparent ink was applied by an inkjet method so as to be adjacent. The transparent ink applying means was adjusted so that the ejection amount per drop of the transparent ink was 22 pl and the resolution was 600 × 600 dpi. The amount of the transparent ink applied to the film was adjusted so that the amount of the undried transparent ink on the film was 12.0 g / m ² . In addition, bidirectional printing, two passes, and 1/4 interlace printing were performed.

(Comparative Example 1)
The obtained color material ink container filled with the color material ink was mounted on the ink jet printer shown in FIG. Then, a 50 mm square solid image and a character image having a font size of 8 pt were obtained through the following coloring material ink application process and heating process on the PET film. Note that the pretreatment liquid application step was not performed by preventing the pretreatment liquid application means from operating.

-Color material ink application process-
As shown in FIG. 4, the color material ink was applied to the film by an ink jet method. The color material ink applying means was adjusted so that the discharge amount per drop of the color material ink was 22 pl and the resolution was 600 × 600 dpi. Further, the amount of the color material ink applied to the film was adjusted so that the amount of the color material ink in the undried state on the film was 12.0 g / m ² . In addition, bidirectional printing, two passes, and 1/4 interlace printing were performed.

-Heating process-
The preheater and print heater shown in FIG. 4 were set to 60 ° C. Moreover, the post heater and the warm air fan were set to 70 ° C.

(Comparative Example 2)
The obtained color material ink container filled with the color material ink and the transparent ink container filled with the transparent ink were mounted on the ink jet printer shown in FIG. The PVC film is subjected to the same color material ink application process and heating process as in Comparative Example 1, and the next transparent ink application process, and a 50 mm square solid image and a character image having a font size of 8 pt are obtained. It was. Note that the pretreatment liquid application step was not performed by preventing the pretreatment liquid application means from operating.

-Transparent ink application process-
As shown in FIG. 4, the transparent ink is ink-jetted so that the transparent image region formed by applying the transparent ink to the film is adjacent to the color material image region formed by applying the color material ink. It was given by the method. The transparent ink applying means was adjusted so that the ejection amount per drop of the transparent ink was 22 pl and the resolution was 600 × 600 dpi. The amount of the transparent ink applied to the film was adjusted so that the amount of the undried transparent ink on the film was 12.0 g / m ² . In addition, bidirectional printing, two passes, and 1/4 interlace printing were performed.

  Next, using the printed matter obtained in each example and each comparative example, the image glossiness of the solid image and the sharpness of the character image were evaluated according to the following methods and evaluation criteria. The evaluation results are shown in Table 3.

[Image glossiness]
The obtained printed matter was allowed to stand for 24 hours, and then the 20 ° glossiness of the solid image portion was measured using a gloss meter (manufactured by BYK Gardener, Micro Trigloss). The case where evaluation was B or more was judged to be practical.
-Evaluation criteria-
A: 20 ° glossiness is 40 or more B: 20 ° glossiness is 30 or more and less than 40 C: 20 ° glossiness is less than 30

[Sharpness]
After the obtained printed matter was allowed to stand for 24 hours, the sharpness (sharpness) of the character image portion was visually evaluated according to the following evaluation criteria. The case where evaluation was B or more was judged to be practically preferable.
-Evaluation criteria-
A: Vivid characters B: Vividness is slightly inferior, but characters can be read C: Characters are crushed and difficult to read

Example 1 is a case where high temperature drying is performed by applying a colorant ink to a pretreatment layer of a liquid layer formed by applying a pretreatment liquid containing a water-insoluble plasticizer. Uniform and smooth dots can be formed, whereby an image with high image glossiness can be obtained. Moreover, since high-temperature drying can be performed without degrading image quality, a printed matter can be obtained in a short time by high-temperature drying, and a printing method with high productivity can be provided.
In Example 2, the pretreatment liquid can be applied only to a portion where the pretreatment liquid is necessary by discharging the pretreatment liquid by an ink jet method. Thereby, the printing method which reduced the usage-amount of the pretreatment liquid can be provided.
In the third embodiment, a transparent image region formed by applying transparent ink is formed at a position adjacent to a color material image region formed by applying color material ink. Thereby, generation | occurrence | production of a bleed is suppressed and the printing method with high definition can be provided.
As in the second embodiment, the fourth embodiment can be applied only to a portion where the pretreatment liquid is necessary by discharging the pretreatment liquid by an ink jet method. Thereby, the printing method which reduced the usage-amount of the pretreatment liquid can be provided. Similarly to the third embodiment, a transparent image region formed by applying the transparent ink is formed at a position adjacent to the color material image region formed by applying the color material ink. Thereby, generation | occurrence | production of a bleed is suppressed and the printing method with high definition can be provided.

1 Roll body 2 Print medium (medium)
11 Liquid discharge head (head)
DESCRIPTION OF SYMBOLS 12 Carriage 13 Guide member 21 Conveying roller 22 Opposed roller 25 Platen member 31 Conveying roller pair 41 Winding roll 51 Preheater 52 Print heater 53 Post heater 54 Hot air fan 80 Pretreatment liquid application part 81 Pretreatment liquid storage tank 82 Film pressure control Roller 83 Pumping roller 84 Application roller 85 Counter roller for application 101 Printing section (image forming section)
DESCRIPTION OF SYMBOLS 102 Conveying part 103 Roll storage part 104 Roll winding-up part 111 Liquid discharge head (head)
112 Carriage 113 Guide member 1101 Printing section (image forming section)
n1-nm nozzle r1-rm nozzle A Sub-scanning direction Na-Ne nozzle row Ra-Re nozzle row

JP 2004-25723 A

Claims (10)

A pretreatment liquid application step of applying a pretreatment liquid containing a water-insoluble plasticizer to the non-absorbent recording medium;
A color material ink application step of applying a color material ink containing a color material and water to a pretreatment layer that is a liquid phase formed by the applied pretreatment liquid.   The printing method according to claim 1, wherein the pretreatment liquid application step is a step of discharging the pretreatment liquid from an inkjet head. A non-absorbent recording medium, including a transparent ink application step of applying a transparent ink containing water and not containing a coloring material,
The printing method according to claim 1, wherein the transparent image region formed by applying the transparent ink is adjacent to the color material image region formed by applying the color material ink.   The printing method according to claim 1, wherein the color material ink application step is a step of discharging the color material ink from an inkjet head.   The printing method according to any one of claims 1 to 4, wherein a region to which the pretreatment liquid of the non-absorbent recording medium is applied includes polyvinyl chloride. The color material ink contains polyurethane resin particles,
The printing method according to any one of claims 1 to 5, wherein a content of the polyurethane resin particles is 1.0% by mass or more and 15.0% by mass or less with respect to the color material ink.   The printing method according to claim 1, wherein the pretreatment liquid does not substantially contain water. Pretreatment liquid application means for applying a pretreatment liquid containing a water-insoluble plasticizer to a non-absorbent recording medium;
A printing apparatus comprising: a color material ink application unit that applies color material ink containing a color material and water to a pretreatment layer formed by the applied pretreatment liquid. A pretreatment liquid container that contains a pretreatment liquid that is applied to the non-absorbent recording medium and contains a water-insoluble plasticizer;
A storage container set having a color material ink storage container for storing a color material ink containing a color material and water, which is applied to a pretreatment layer that is a liquid phase formed by the applied pretreatment liquid. Non-absorbent recording medium, water-insoluble plasticizer-containing layer formed on the non-absorbable recording medium and containing a water-insoluble plasticizer, and a colorant containing a colorant formed on the water-insoluble plasticizer-containing layer A containing layer,
Printed matter having a 20 degree glossiness of 30 or more on the surface of the colorant-containing layer.