JP2003340357A - Glossy print and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a print which is excellent in deinking properties, has an overcoat layer formed from a water-based coating agent using no volatile organic solvent, is free of the appearance of roller spots on the surface, and has surface glossiness of about 90, and to provide a method for manufacturing the print. <P>SOLUTION: In the glossy print and its manufacturing method, a printing layer 12 for an offset ink is formed on the surface of a paper base material 10, the first overcoat layer 14 is formed in a line by the application of the water-based coating agent and drying, the second overcoat layer 16 is formed on the first overcoat layer 14 in another line by the application of the water- based coating agent and drying, and the print is pressed by a specular plate from above the second overcoat layer 16. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed matter having excellent glossiness and a method for producing the same, and more particularly to a printed matter having high glossiness used for a cosmetic case and the like and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a high-gloss printed matter for a paper container which has been used for a cosmetic box or the like and which is excellent in cosmetics, a printing layer and a gloss coating layer are provided on the surface of a paper base material such as cardboard. 60
And a surface glossiness (measured value according to the optical characteristic test method of plastic of JIS K 7105, hereinafter simply referred to as surface glossiness) of 60 or more was used. As such a high-gloss printed matter having a surface glossiness of 60 or more, for example, an ultraviolet curable ink (hereinafter, UV
In general, a printing layer is formed on the surface of a paper substrate such as cardboard with an ink), and an overcoat layer made of an ultraviolet curable coating agent for high gloss (hereinafter referred to as UV varnish) is formed on the printing layer. It is suitable for use as a method capable of forming an overcoat layer in-line by connecting to a high-speed printing machine because of its advantage of quick drying and curing by irradiation with ultraviolet rays.

However, as described above, a high-gloss printed matter using a UV ink or UV varnish can obtain a surface glossiness of 60 or more, which enables in-line formation in forming the overcoat layer. In view of the increase in waste and the serious environmental problems related to it, after using a high-gloss printed material such as a paper container, when reusing it as recycled paper, the deinking process (printing ink of used paper In the printed matter using the above-mentioned UV ink and UV varnish, the printed layer and overcoat are removed with hot water and chemicals, and then the ink is attached to the bubbles in a flotator to float and remove it. It was difficult to reuse this high-gloss printed matter as recycled paper because the layer had poor deinking property.

In view of the above environmental problems, recently, as a method of increasing the surface glossiness of a printed material without using the above-mentioned UV ink and UV varnish, for example, excellent deinking property and no organic solvent are used, that is, fire fighting. Emulsion of acrylic resin, etc., which is superior in compliance with the law (dangerous substances) and the Industrial Safety and Health Act (organic solvent poisoning prevention rule), and which also contributes to the control of emissions of volatile organic compounds (VOC) with consideration for environmental issues. On the printed layer of offset oil-based ink with excellent deinking property (for UV curable ink, ink mainly composed of oxidative polymerization type drying oil etc.) using the water-based coating agent Apply the water-based coating agent, dry it with near infrared rays, etc., form an overcoat layer by a resin letterpress coating method etc. in-line with an offset printing machine, and then in a separate line stainless steel bell Jo of this printed material mirror plates pressed, the surface glossiness is intended to be high gloss print about 70.

Alternatively, as another method for increasing the surface glossiness of a printed matter without using the above UV ink or UV varnish,
For example, using a water-based coating agent composed of an emulsion such as the acrylic resin similar to the above, to a printed matter composed of an oil-based ink for offset or a water-based gravure ink excellent in deinking property, on a line separate from this printing machine, A water-based coating agent is applied by a roll coating method with a slow line speed, forcibly dried by near infrared rays, etc., and pressed by a belt-shaped mirror surface plate connected to this coating machine to obtain a high gloss with a surface gloss of about 70. There are things to be printed.

[0006]

However, in the method for producing a high-gloss printed matter by pressing the overcoat layer obtained in-line with the above-mentioned offset printing machine with a mirror plate, coating of the aqueous coating agent as this overcoat layer Amount (dry) but high line speed (150m / mi
Therefore, the amount is as small as about 2 g / m 2 and the crushing is poor even when pressed thereafter, the surface glossiness is increased only by about 70, and the coat eyes (also referred to as roller eyes) in a coat such as a resin relief plate are formed. This is a difficult method for producing a printed matter requiring a high gloss with a surface gloss of about 90.

Further, in the method of applying a water-based coating agent to the above-mentioned printed matter such as offset with a roll coater in another line and then pressing with a mirror surface plate to obtain a high-gloss printed matter, the application of the water-based coating agent as the overcoat layer is performed. The amount (in dry) can be increased up to about 4.5 g / m 2 because the line speed is slowed down to about 20 m / min, but it is a little larger than the in-line method with the offset machine. However, even with this, the coating amount is not large, and even if it is pressed thereafter, the crushing is not good, the surface glossiness is only about 70, and the roll gloss of the roll coater appears, so the surface glossiness is about 90. It was a difficult method to obtain printed matter requiring high gloss.

The present invention solves the problems and demands of the prior art. The problem is that it is excellent in deinking property when recycled to recycled paper and does not use a volatile organic solvent. In addition, the printed matter with high gloss that has an overcoat layer formed with an aqueous coating agent that is superior in complying with the Fire Defense Law, Labor Safety Law, or VOC emission control, and the production of the printed matter with no roller marks on the surface and surface glossiness. To provide a printed matter having high glossiness of about 90 and a method for producing the same.

[0009]

In order to achieve the above object in the present invention, first, in the invention of claim 1, a print layer of offset ink is formed on the surface of a paper substrate, and the print layer is covered. As described above, a first overcoat layer is formed by applying an aqueous coating agent and drying, and a second overcoat layer is formed by applying an aqueous coating agent and drying on the dried first overcoat layer, and then dried. The printed matter having a high gloss is characterized in that it is pressed from above the second overcoat layer with a heated mirror surface plate.

According to the first aspect of the present invention, the first overcoat layer made of the aqueous coating agent and dried is formed on the printing layer of the offset ink, and the first overcoat layer made of the aqueous coating agent is dried on the first overcoat layer. Since the second overcoat layer is formed, when recycled to recycled paper, it is excellent in deinking property and has a high glossiness that is superior in complying with the Fire Service Act, Labor Safety Act or atmospheric emission regulations, Furthermore, since a thick layer is formed by the two layers of the first overcoat layer and the second overcoat layer, pressing the thick layer with a heated mirror-finished plate improves the crushing, and also improves the roller grain. It is possible to provide a printed matter having a high glossiness with a higher surface glossiness that disappears by this press even if the above occurs.

Further, in the invention of claim 2, the aqueous coating agent forming the first overcoat layer and the second overcoat layer comprises an acrylic polymer or a copolymer of acrylic and styrene. The printed matter having high gloss according to claim 1.

According to the second aspect of the present invention, the two layers of the first overcoat layer and the second overcoat layer are formed of a thermoplastic acrylic polymer or a resin mainly containing a copolymer of acrylic and styrene. , This thick layer consisting of two thermoplastic layers is pressed by a heated mirror surface plate to improve crushing, and even if there are roller eyes etc., it disappears with this press, higher surface gloss A printed matter having high glossiness can be provided.

Further, in the invention of claim 3, a printing layer is formed on the surface of the paper base material by an offset printing method using an offset ink, and an aqueous coating is formed so as to cover the printing layer in conjunction with the formation of the printing layer. Agent is applied and dried to form a first overcoat layer, an aqueous coating agent is applied onto the dried first coat layer and dried to form a second overcoat layer, and the dried second coat layer is formed. This is a method for producing a printed matter having high gloss, which comprises pressing the overcoat layer with a heated mirror surface plate.

According to the third aspect of the present invention, a printing layer is provided on the surface of the paper substrate by offset printing, and an aqueous coating agent is applied (inline) on the printing layer and dried in tandem with the formation of the printing layer. To form a first overcoat layer, apply a water-based coating agent on the first overcoat layer on a separate line, and dry to form a second overcoat layer, which is interlocked with the formation of the second overcoat layer. Since it is pressed (in-line) from above the second overcoat layer with a heated mirror surface plate, it has excellent deinking property and high glossiness that is excellent in complying with the Fire Service Act, Labor Safety Act or VOC emission control. As a method for producing a printed matter, further, since a thick layer is formed by the two layers of the first overcoat layer and the second overcoat layer, the thick layer composed of the two layers is pressed by a heated mirror plate to crush it. Better is also out roller eyes or the like disappears in this press can provide a method for producing a printed material having a higher surface gloss is high high gloss.

Furthermore, in the invention of claim 4, the aqueous coating agent for forming the first overcoat layer and the second overcoat layer comprises an acrylic polymer or a copolymer of acrylic and styrene, and the first coating layer The viscosity of the water-based coating agent that causes the formation of is in the range of 10 to 20 seconds (measured with # 4) by the Zahn cup measurement method,
The method for producing a printed matter having high gloss according to claim 3, wherein the viscosity of the water-based coating agent that forms the second overcoat layer is in the range of 10 to 20 seconds (measured in # 4). It was done.

According to the invention of claim 4, the aqueous coating agent for forming the first overcoat layer and the second overcoat layer is a resin mainly containing a thermoplastic acrylic polymer or a copolymer of acrylic and styrene. By setting the viscosity in the range of 10 to 20 seconds (measured by # 4) by the Zahn cup measurement method for forming the first overcoat layer, the viscosity of about 2 g / m 2 in-line can be obtained corresponding to the offset printing speed. A stable film of the first overcoat layer and a thick film of about 4 g / m 2 by forming the second overcoat layer in a range of 10 to 20 seconds (measured with # 4) by the Zahn cup measurement method. A thick second overcoat layer is stably obtained, and a printed product having a high gloss with a higher surface gloss is obtained by pressing with a heated mirror plate. It can be. If the viscosity of the water-based coating agent for forming the first overcoat layer is less than 10 seconds by the Zahn cup measurement method, the coating amount is extremely reduced in-line with offset printing, resulting in a coating film having unevenness, On the contrary, if it exceeds 20 seconds, the coating amount becomes large, but it is not preferable because the drying may not catch up with in-line with offset printing, and the viscosity of the water-based coating agent for forming the second overcoat layer has a zern cup. If the measurement method is less than 10 seconds, the above-mentioned coating amount becomes small, and a satisfactory high gloss cannot be obtained by subsequent pressing with a heated mirror surface plate, which is not preferable.

The Zahn cup measuring method referred to in claim 4 is an outflow viscometer in conformity with the standard of JIS K5400 or ASTM D1200, and has a diameter of 3 cm used in a Zahn cup viscometer manufactured by Sogo Co., Ltd., Capacity 45c
The ink viscosity is measured by measuring the time (seconds) until a fixed amount of ink in the metal cup of c passes through the orifice at the bottom and finishes flowing out. There are four types of cups, # 5, which are used for low viscosity inks such as gravure printing and flexographic printing.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The present invention relates to a printed matter having a high gloss used for a cosmetic box or the like having excellent beauty and a method for producing the same, and the invention according to claim 1 is
As shown in the side cross-sectional stacking diagram of FIG. 1, a printing layer (12) of offset ink is formed on the surface of a paper base material (10) made of, for example, paperboard, and the aqueous layer is formed so as to cover the printing layer (12). A first overcoat layer (14) is formed by applying a coating agent and drying, and a second overcoat layer (16) is formed on the dried first overcoat layer (14) by applying an aqueous coating agent and drying. The dried second overcoat layer (16) thus formed is to be a printed matter (1) having high gloss, which is pressed by a heated mirror plate.

In the invention according to claim 2, for example, as shown in FIG. 1, the aqueous coating agent forming the first overcoat layer (14) and the second overcoat layer (16) is acrylic. A polymer or a thermoplastic binder containing a copolymer of acrylic and styrene as a main component, which is heated on the thermoplastic first overcoat layer (14) and second thermoplastic overcoat layer (16). The printed matter (1) having a high gloss is pressed by a mirror plate.

The first overcoat layer (14) and the second overcoat layer (16) are coating agents (water-based coat) composed of an aqueous emulsion in which a resin mainly composed of an acrylic polymer or a copolymer of acrylic and styrene is dispersed. Agent), and by using the aqueous coating agent as described above, the coating suitability and the surface glossiness can be further enhanced. More specifically, as the water-based coating agent, the resin mainly composed of the acrylic polymer or the copolymer of acrylic and styrene is 40 to 8
An example is an aqueous emulsion in which 5% by weight is dispersed and the rest is a wetting agent, a surfactant or the like to improve the film characteristics. The coating amount of this aqueous coating agent is the first overcoat layer (14 ) Is about 2 to 3 g / m 2 and the second overcoat layer (16) is 3 to 7 g.
The range of about / m 2 is preferable from the standpoint of enhancing coating suitability and surface gloss. As a solvent for dissolving or dispersing these solids, water is mainly used, and as an organic solvent to be partially added, for example, alcohols such as ethanol, methanol, isopropanol, n-butanol, acetone, methyl ethyl ketone, ethyl acetate and the like can be mentioned.

Since the printed matter (1) having a high gloss having the above-mentioned constitution does not use UV ink or UV varnish, it is excellent in deinking property when recycled onto recycled paper and contains a volatile organic solvent. Since it is not used, it can be a printed matter (1) having high gloss superior in compliance with the Fire Defense Law, Labor Safety Law, or atmospheric emission regulations, and the above first overcoat layer (14) and second overcoat layer (14). 6 in 2 layers of coat layer (16)
Since a thick layer of about g / m 2 is formed, this thermoplastic thick layer is better crushed by pressing with a heated mirror surface plate, and even if roller eyes etc. appear, this press will It is possible to obtain a printed matter (1) which has a high glossiness and has a higher surface glossiness.

Further, the invention according to claim 3 has a paper base material (10) as shown in a schematic side view of FIG. 2 (a), for example.
The four-color printing layer (12) is formed on the surface of the offset printing section (100), and the first overcoat layer coating section (200) connected to the offset printing section (100).
Is applied on the printed layer (12) and dried in the drying section (210) of the first coat layer to form a first overcoat layer (14).
Is formed inline with offset printing.

Subsequently, the first overcoat layer (14)
Formed on the printing layer (12), for example, as shown in FIG.
As shown in the schematic side view of (b), the first overcoat layer (14) is applied in the application section (300) of the second overcoat layer and dried in the drying section (310) of the second overcoat layer. Forming a second overcoat layer (16) thereon,
The surface of the second overcoat layer (16) is brought into contact with the heated belt-shaped mirror surface plate (40) so that the pressure roll (4
4) Press coat part (40
Printed matter (1) having high gloss by passing through (0) and peeling from the belt-shaped mirror surface plate (40) with a peeling roll (42).
And the manufacturing method.

Furthermore, the invention according to claim 4 is
The aqueous coating agent for forming the first overcoat layer (14) shown in FIG. 1 is composed of a thermoplastic acrylic polymer or a copolymer of acrylic and styrene, and the viscosity of the aqueous coating agent is 10 to 10 by the Zahn cup measurement method. The range is 20 seconds (measured in # 4), which allows, for example, the offset printing unit (10) shown in FIG.
This is a method for producing a printed matter (1) having high gloss so that a first overcoat layer (14) of about 2 g / m 2 can be stably obtained in-line corresponding to the speed at 0).

The second overcoat layer (16)
The viscosity of the water-based coating agent that causes the formation of 10 to 20 seconds (measured in # 4) is set, whereby the coating portion (300) of the second overcoat layer shown in FIG. A printed matter (1) having high gloss so that a second overcoat layer (16) having a large film thickness of about 4 to 5 g / m 2 can be stably obtained corresponding to the speed at
Is a manufacturing method.

As shown in FIG. 2A, the formation of the first overcoat layer (14) is carried out by a letterpress printing method using a resin letterpress, a flexographic printing method in which a coating agent is transferred through an anilox roller, or The coating is performed in the coating portion (200) of the first overcoat layer by a gravure printing method or the like, and the drying is performed, for example, in the wavelength region of 0.75 to 2.5 μm.
This is done in the drying section (210) of the first overcoat layer by irradiation with near infrared rays in the range of m.

As shown in FIG. 2B, the second overcoat layer (16) is formed, for example, by a roll coating method using a rubber roll or the like, or a rotary screen coating method or the like, by which the second overcoat layer is applied. (300)
The wavelength range is 0.75 to 0.75, for example.
It may be performed in the drying section (210) of the first overcoat layer by irradiation with near infrared rays in the range of 2.5 μm, and the drying efficiency may be increased by warm air or cold air before and after this.

The paper base material (10) relating to the printed matter (1) having high gloss of the present invention, for example, has a basis weight of 100 g / m.
2 or more, preferably about 310 g / m 2 of thick paper is used, and specifically, coated paper such as coated balls, uncoated balls, special Manila, ivory, etc., having high gloss used for paper containers such as cosmetic boxes. It can be a printed matter (1).

[0029]

EXAMPLES Next, the present invention will be specifically described with reference to examples. <Example 1> As shown in FIG. 2A, a paper base material (10)
As measured by the Beck smoothness tester of JIS P 8119, the basis weight is 4 in 500 seconds.
On one side of a 50 g / m 2 coated ball, an offset oil-based ink was used in an offset printing section (100) to
A printing layer (12) was formed at a speed of m / min, and the viscosity was adjusted to 18 seconds by the Zahn cup measurement method in-line with this offset printing (that is, at the same speed): Toyo Litho Coat 300A Varnish J ( Toyo Ink Mfg. Co., Ltd.) is applied with a resin letterpress plate, dried, and then applied in an amount of 2.5 g
A m2 (dry) first overcoat layer (14) was obtained.

The first overcoat layer (1
4) As shown in FIG. 2B, an aqueous coating agent having a viscosity adjusted to 12 seconds by the Zahn cup measurement method in the coating portion (200) of the second overcoat layer: Aquacoat KPT
S varnish (manufactured by Toyo Ink Mfg. Co., Ltd.) was applied by a roll coating method at a speed of 20 m / min, dried, and the applied amount was 4 g.
/ M2 (dry) second overcoat layer (16) is formed, and the coating portion (200) of this second overcoat layer is formed.
At the same speed (in-line) as above, the surface of the second overcoat layer (16) obtained above was made of stainless steel heated to a surface temperature of 125 ° C.
0) and the pressure roll (44) underneath it
And a peeling roll (4).
It was peeled off from the belt-shaped mirror plate (40) in 2) to obtain a printed matter (1) having high gloss.

The printed matter (1) having high glossiness obtained above had a surface glossiness at an incident angle of 60 ° of 93 or more and was excellent in glossiness without roller eyes.

<Comparative Example 1> Second overcoat layer (1
6) having glossiness in the same manner as in Example 1 except that the printing layer and the first overcoat layer are formed and the first overcoat layer is pressed in the press coat section (400) I got a print.

The surface glossiness of the thus-obtained printed matter having glossiness at an incident angle of 60 ° was 65, which was conspicuous such as roller eyes.

Comparative Example 2 First overcoat layer (1
4) is not applied (that is, the second overcoat layer (not shown) is formed on a separate line on the printed material on which the printed layer is formed, and the second overcoat layer is pressed by the press coat part (400)) A printed matter having glossiness was obtained in the same manner as in Example 1.

The surface glossiness of the printed matter having the glossiness obtained above at an incident angle of 60 ° was 72, which was conspicuous such as roller eyes.

[0036]

Since the present invention has the above-mentioned constitution, it has the following effects. That is, in the invention according to claim 1, a printing layer of an offset ink is formed on the surface of a paper substrate, and a first overcoat layer is formed by coating and drying an aqueous coating agent so as to cover the printing layer, Since the second overcoat layer is formed by applying and drying the aqueous coating agent on the dried first overcoat layer, it is excellent in deinking property when recycled to recycled paper, and the Fire Defense Law and Labor Safety Act Alternatively, the printed matter has a high glossiness that is highly compliant with atmospheric emission regulations, and since a thick layer is formed by the two layers of the first overcoat layer and the second overcoat layer, the thick layer is heated. By pressing with a mirror surface plate, it is possible to provide a printed matter having good crushing properties and high gloss having a surface gloss higher than that of the roller eyes and the like disappeared by this press.

In the invention according to claim 2,
Since the two layers of the first overcoat layer and the second overcoat layer are formed of a resin mainly composed of a thermoplastic acrylic polymer or a copolymer of acrylic and styrene, this thermoplastic thick layer consisting of two layers is By pressing with a heated mirror surface plate, it is possible to provide a printed matter having good crushing properties and high gloss having a surface gloss higher than that of the roller eyes and the like disappeared by this press.

Further, in the invention according to claim 3, a printing layer is formed on the surface of the paper base material by an offset printing method using an offset ink, and the printing layer is formed (in-line) in conjunction with the formation of the printing layer. An aqueous coating agent is applied so as to cover and is dried to form a first overcoat layer, and an aqueous coating agent is applied on the dried first overcoat layer and dried to form a second overcoat layer, Since the method for producing a printed matter having high gloss is obtained by pressing the dried second overcoat layer with a heated mirror plate, it is excellent in deinking property and complies with the Fire Defense Law, Labor Safety Law or VOC emission control. In addition, since a thick layer is formed by the two layers of the first overcoat layer and the second overcoat layer, by pressing the thick layer composed of the two layers with a heated mirror surface plate, Shake well, disappeared in also this press roller eyes or the like, can provide a method for producing a printed material having a higher surface gloss is high high gloss.

Further, in the invention according to claim 4, the aqueous coating agent for forming the first overcoat layer and the second overcoat layer is mainly composed of a thermoplastic acrylic polymer or a copolymer of acrylic and styrene. The viscosity of the resin was set to be in the range of 10 to 20 seconds (measured with # 4) by the Zahn cup measurement method for the formation of the first overcoat layer, so that it could be processed in-line corresponding to the speed of offset printing. 2g / m due to high speed
The first overcoat layer of about 2 is stably obtained, and the second overcoat layer is formed in a range of 10 to 20 seconds (measured with # 4) by the Zahn cup measurement method by 4 g / A second overcoat layer having a thick film thickness of about m 2 can be stably obtained, and a printed product having a high gloss with a higher surface gloss can be obtained by pressing with a heated mirror plate.

Therefore, the present invention exhibits excellent practical effects as a printed matter having excellent glossiness and a method for producing the same, particularly as a printed matter having a high glossiness used for a decorative case and the like and a method for producing the same.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a printed matter having high gloss of the present invention in a side section.

FIG. 2 is a diagram illustrating a method for producing a printed matter having high gloss according to the present invention, in which (a) is a schematic side view showing an example of forming a printed layer and a first overcoat layer, )
FIG. 3 is a schematic side view showing an example of a second overcoat layer and a press coat part.

[Explanation of symbols]

1 ... Printed matter with high gloss 10 ... Paper base material 12 ... Printing layer 14 ... First overcoat layer 16: Second overcoat layer 40 ... Belt-shaped mirror plate 42 Peeling roll 44 ... Pressure roll 46 Tension roll 100 offset printing section 200 ... First overcoat layer coating part 210 ... Drying part of the first overcoat layer 300 ... Application part of the second overcoat layer 310 ... Drying part of second overcoat layer 400 ... Press coat section

Claims (4)

[Claims] 1. A printing layer of offset ink is formed on the surface of a paper substrate, a first coating layer is formed by coating and drying an aqueous coating agent so as to cover the printing layer, and the first overcoat is dried. A high gloss property, characterized in that a second overcoat layer is formed on the coat layer by applying an aqueous coating agent and drying, and the dried second overcoat layer is pressed with a heated mirror plate. Printed matter having. 2. The high gloss according to claim 1, wherein the aqueous coating agent forming the first overcoat layer and the second overcoat layer is made of an acrylic polymer or a copolymer of acrylic and styrene. Printed matter. 3. A printing layer is formed on the surface of a paper base material by an offset printing method using an offset ink, and an aqueous coating agent is applied so as to cover the printing layer in tandem with the formation of the printing layer and dried. A first overcoat layer is formed, an aqueous coating agent is applied onto the dried first overcoat layer and dried to form a second overcoat layer, and heating is performed from above the dried second overcoat layer. For producing a printed matter having high glossiness, which comprises pressing with a mirror surface plate. 4. The water-based coating agent for forming the first overcoat layer and the second overcoat layer comprises an acrylic polymer or a copolymer of acrylic and styrene, and is a water-based coating agent for forming the first overcoat layer. The viscosity is in the range of 10 to 20 seconds (measured in # 4) by the Zahn cup measurement method, and the viscosity of the aqueous coating agent forming the second overcoat layer is 10 to 20 seconds (#
4. The method for producing a printed matter with high gloss according to claim 3, characterized in that it is in the range of (4).