KR101765017B1 - Partial etch coating method without etching plate - Google Patents

Abstract

The present invention relates to a partial etching and coating method without an etching plate. The partial etching and coating method without an etching plate comprises: a first to a fourth printing step (S10-S40) of using a first color to a fourth color plate (111-114) to sequentially print UV ink of four primary colors on paper (101) to form a four-primary color print layer (102); and a fifth printing step (S50) of using a spot color plate (115) to print spot color ink of a fluorescent color to form a fluorescent print layer (103). The partial etching and coating method without an etching plate further comprises: a first emitting step (S60) of emitting a UV lamp onto the paper (101) on which the four-primary color print layer (102) and the fluorescent print layer (103) are formed to harden the area of the four-primary color print layer (102) first; a coating step (S70) of coating varnish on the paper (101) which has undergone the first emitting step (S60) without a separate etching plate to form a coating layer (104); and a second emitting step (S80) of emitting the UV lamp onto the paper on which the coating layer (104) is formed to form etching texture (105) only on the portion of the fluorescent print layer (103). A UV offset printer is used to express a partial etching effect by a photochemical reaction on a specific portion of a printed material without using a separate plate for etching.

Description

[0001] PARTIAL ETCH COATING METHOD WITHOUT ETCHING PLATE [0002]

The present invention relates to a partial etching coating method in which an etching plate is excluded. More particularly, the present invention relates to a method for forming a partial etching effect on a printed matter through hybrid printing using a UV offset printing machine, The present invention relates to a partial etching coating method which excludes an etching plate which causes a partial etching effect by inducing a photochemical reaction by ultraviolet irradiation.

In general, offset printing is an indirect printing method in which a printing plate is transferred to a rubber roller by printing ink on a plate, and then transferred to paper.

Unlike the direct printing method in which the paper is directly closed on the printing plate, the offset printing can produce an excellent printing quality on the rough paper, and it is possible to print the multicolor color using the printing plate which is formed by a plurality of different angles. And a variety of printed materials such as various promotional materials and business cards.

The printing plate used for offset printing is made of a metal plate whose surface is smooth. Since the surface of the plate is treated with a photosensitive material, the metal line is lipophilic and the non-linear portion is hydrophilic. Therefore, by using the property of repelling water and oil, when the ink is applied to the printing surface while the ink is applied to the printing surface, printing is performed on the principle that the ink is not added to the non-inking portion,

Since the ink used for the offset printing as described above is mostly organic solvent type, it is inevitable to use a volatile organic solvent containing a harmful component to the human body. In recent years, UV offset printing using UV inks having ultraviolet curing ability has become popular Trend.

That is, since UV ink used for UV offset printing has a characteristic of instantaneous curing upon exposure to ultraviolet rays (UV), it has excellent hardening and drying ability compared with conventional organic solvent type ink, and thus workability and productivity are high, There is an advantage.

On the other hand, in recent years, demand for an etching effect for expressing an elegant feeling by giving an embossed texture to a printing area such as a high-grade business card or a cosmetic package is increasing.

As a method of expressing an etching effect on a printed matter, a method of expressing an etching effect by using a silk screen method and coating an etching ink on an existing printing area to induce a chemical reaction has been used.

In addition, Japanese Patent Application Laid-Open No. 10-2001- 0058951 discloses an etching printing method using an offset printing machine. In the structure of the conventional offset printing press, the ink is transferred while contacting the plate passing through the offset printing plate, A blanket and a pressure roller for conveying the printing paper in contact with the blanket. A double-sided tape is attached to the outer periphery of the blanket, and a resin plate or a foil plate is attached to the outer periphery of the blanket so as to be used as a printing plate for transferring the etching ink.

Published Patent No. 10-2001- 0058951 Patent No. 10 - 2011 - 0078704

As described above, in recent years, the demand for an etching effect that expresses an elegant feeling by giving an embossed texture to a printing area of a high-quality printed matter is increasing.

Conventionally, a method of expressing an etching effect by coating an ink for etching on an existing printing area using a silk screen method has been used.

In recent years, however, UV offset printing using ultraviolet curable inks has been widely used instead of organic solvent inks which are superior in print quality and capable of printing multicolor color using a large number of printing plates and above all, harmful to human bodies. It is inconvenient to additionally perform a silk screen printing process using an etching ink in order to impart the above-described etching effect to a printed article.

Therefore, a method of expressing an etching effect by using an offset printing machine has been developed and provided in recent years by recognizing problems such as process delay, workability, and lowered productivity due to the execution of an additional process.

A method of developing an etching effect using an offset printing press to which the prior art is applied is a method in which a resin plate or a foil plate is attached to an outer periphery of a blanket in which ink is transferred while contacting a plate on which ink of an offset printing press is transferred, And is used as a printing plate.

However, the prior art has a problem that the conventional offset printing machine needs to be structurally changed to give an etching effect to a printed matter using an offset printing machine.

This is because, due to the nature of offset printing, due to the fact that a plate for individual printing must be provided for each type of ink to be put into printing, the above-mentioned prior art also uses a resin plate or a foil plate as a blanket to be used as a printing plate for transferring etching ink Respectively.

Therefore, in hybrid printing, which basically involves a complicated work in accordance with a structural change of the printing press as well as a partial etching effect only on a specific region of a printed material and gives various kinds of texture to the printed material, There is a problem that it can not be practically applied since a change operation must be performed beforehand.

Accordingly, the present invention has been made to solve the above-mentioned problems,

The first to fourth printing steps of forming the four-primary-color printed layer 102 by sequentially printing UV inks of four primary colors using the first to fourth color plates 111 to 114, respectively, And a fifth printing step (S50) of printing a spot color ink of fluorescent color using a spot color plate (115) to form a fluorescent print layer (103);

A first irradiation step S60 of irradiating a UV lamp onto the paper 101 on which the four primary color printing layer 102 and the fluorescent color printing layer 103 are formed to cure the region of the four primary color printing layer 102;

A coating step S70 of removing a separate etch sheet from the paper 101 after the first irradiation step S60 and applying a varnish to form a coating layer 104;

And a second irradiating step (S80) of irradiating a UV lamp to the paper 101 on which the coating layer 104 is formed to form an etching texture 105 only on the fluorescent printing layer 103, It is possible to achieve a partial etching effect by a photochemical reaction at a specific site of a printed material while eliminating the use of a separate plate for etching.

The present invention has the advantage of expressing a luxurious feeling unique to hybrid printing by applying a partial etching effect such as embossing to a specific portion of a printed matter using a UV offset printing machine.

In the present invention, the etching effect can be easily given to the printed matter by using the UV offset printing machine. In addition, it is possible to change the structure of the printing machine or to use a separate sheet material for etching UV inks, spot inks, and varnishes of different chemical properties are formed, and then the etching effect is manifested effectively by ultraviolet ray photochemical reaction. Therefore, the efficiency of the process and the workability are improved by making full use of the advantages of UV offset printing To increase productivity and to produce high-quality prints.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a process flow diagram according to an embodiment of a partial etch coating method without the etching plate of the present invention.
FIG. 2 is a process example according to an embodiment of a partial etching coating method excluding the etching plate of the present invention; FIG.
3 is a schematic cross-sectional view of a printed matter according to an embodiment of a partial etching-coating method excluding the etching plate of the present invention.

Hereinafter, the structure and operation of the partial etching-free coating method of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a process flow diagram according to an embodiment of a partial etching coating method excluding the etching plate of the present invention, FIG. 2 is an example of a process according to an embodiment of a partial etching coating method excluding the etching plate of the present invention, Sectional view of a printed matter according to an embodiment of a partial etching-coating method in which an etching plate is omitted.

In the partial etching coating method excluding the etching plate to which the technique of the present invention is applied, in the printing method using the UV offset printing machine, UV ink having different chemical characteristics, spot color ink and varnish are formed to induce photochemical reaction by ultraviolet rays The present invention is directed to a technique for producing a partial etching effect on a printed matter while excluding the use of a separate etching plate.

The partial etching coating method excluding the etching plate of the present invention for this purpose is a first to fourth printing step to form the four primary color printing layer 102 used for multicolor color printing as shown in FIG. A first irradiation step S60 for irradiating ultraviolet rays; a step S60 for irradiating the coating layer 104 with the ultraviolet rays to form the fluorescent printing layer 103; (S70) forming an etching texture (105), and a second irradiation step to a third irradiation step (S80 to S90) for forming and curing and drying the etching texture (105). As shown below.

The first to fourth printing steps S10 to S40 sequentially print the UV inks of the four primary colors on the paper 101 using the first to fourth color plates 111 to 114, Thereby forming the primary color print layer 102. [

The four primary colors used in multicolor printing in UV offset printing are generally black, cyan, magenta, and yellow, and are equipped with UV inks of each color for printing.

UV inks have the chemical properties of UV light to induce the photochemical reaction and cure from liquid to solid within a few seconds. This is due to the synthetic resin component in the UV contained in the UV ink, and when exposed to ultraviolet rays, the polymer is chemically bonded in an annular shape and cured.

Since the curing degree of the UV ink is increased in proportion to the intensity of ultraviolet rays, the curing rate can be differentiated by controlling the ultraviolet ray frequency.

The first to fourth color plate materials 111 to 114 are provided for each of the first to fourth printing steps S10 to S40 for printing respective colors, .

Basically, the offset printing is performed so that the four primary colors printed on the paper 101 are partially overlapped by the principle of juxtaposition blending so as to be prominent with the intended primary color when viewed by the naked eye. Therefore, the first to fourth color plates 111 The first color plate 111 and the second color plate 112 are arranged at different angles such that the first color plate 111 is 45 °, the second color plate 112 is 15 °, the third color plate 113 is 75 °, A perforated surface punctured at 0 [deg.] Is formed and each color is overlapped in a part.

Therefore, in the first to fourth printing steps S10 to S40, the four primary color printing layer 102 is formed on the paper 101 in the desired color.

The fifth printing step (S50) is a step of forming a fluorescent print layer 103 by printing spot color inks of fluorescent color which are effective for manifesting an etching effect in addition to the four primary colors using the spot color plate material 115. [

In the final print completed by the present invention, the etching effect is developed at the portion where the fluorescent printing layer 103 is printed. The spot color ink used in the fifth printing step (S50) contains a small amount of photopolymerizable resin And the fluorescent color print layer 103 is formed using spot color inks, which will be described later in detail.

In the first irradiation step S60, the UV lamp is irradiated on the paper 101 on which the four primary color printing layer 102 and the fluorescent color printing layer 103 are formed to cure the region of the four primary color printing layer 102 .

That is, the printed matter on which the four primary color printing layer 102 and the fluorescent color printing layer 103 are printed through the first to fifth printing steps (S50) as described above is irradiated with ultraviolet rays As described above, since the spot color ink contains a small amount of photopolymer resin as compared with the UV ink of the four primary colors, the curing speed of the two inks is different when irradiated with ultraviolet rays of the same frequency.

Therefore, in the first irradiation step S60, the light emitting temperature of the UV lamp is set to 120 deg. C to delay the curing of the spot color ink during the firing completion time of the UV ink, and the second irradiation step S80 ) So that the chemical reactivity can be triggered in the uncolored spot color ink.

In the coating step S70, a separate etching plate is removed from the paper 101 after the first irradiation step S60 and the varnish is coated to form the coating layer 104. [

In general, in order to impart various texture to printed matter, for example, a varnish often used for imparting a gloss effect in a hybrid printing which gives a different texture to a background and a specific region contains a wax component to form a colorless glossy coating film For the purpose of. Therefore, in order to form a coating film using a varnish at a specific portion of a printed material during hybrid printing using an offset printing press, it is of course necessary to provide a separate plate material.

In the present invention, the varnish is used for imparting an etching effect only to a specific portion, that is, a portion of the fluorescent print layer 103, and is different from the conventional one in that a separate plate for printing only a specific portion in hybrid printing is provided In the coating step S70, the coating layer 104 is formed on the entire surface of the printed material on which the four primary color printing layer 102 and the fluorescent color printing layer 103 are formed, so that the use of a separate etching plate can be eliminated have.

In addition, the varnish used in the present invention is constituted to contain a small amount of slip components as compared with a conventional varnish, so that the non-slip reaction is induced in the second irradiation step (S80) to be described later.

Therefore, in the second irradiation step S80, the UV lamp is irradiated on the paper 101 on which the coating layer 104 is formed to form the etching texture 105 only on the fluorescent printing layer 103. [

That is, in the second irradiation step S80, the light emitting temperature of the UV lamp is set to 140 deg. C, and the photochemical reaction between the fluorescent layer 103 and the coating layer 104, which is uncured in the first irradiation step S60, So as to form an etching texture 105 only in the region of the fluorescent print layer 103.

After the second irradiating step S80, the third irradiating step S90 is performed. However, the light emitting temperature of the UV lamp is set to 160 deg. C so that the fluorescent print layer 103 and the coating layer 104 are completely Curing and drying.

The process configuration of the partial etching coating method excluding the etching plate to which the technique of the present invention having the above-described structure is applied will be briefly described below.

First, as shown in FIG. 2, first to fourth color plates 111 to 114 are provided for printing UV inks of four primary colors, and the first to fourth printing steps S10 to S40 ), A unit in which a fifth printing step (S50) is carried out, in which a spot color plate (115) is provided for printing spot color inks, and a unit for curing the inks by irradiating ultraviolet light In the constitution of the printing machine, a unit for performing the coating step (S70) for printing the varnish and a unit for irradiating ultraviolet rays are provided in the unit for performing the first to third irradiation steps (S60, S80, S90) The units are divided into first to third units.

Particularly, in the unit in which the coating step (S70) for forming the coating layer 104 by applying the varnish is performed, it is not necessary to provide a separate etching plate, and the entire surface of the four primary color printing layer 102 and the fluorescent printing layer 103 The varnish is applied over the varnish.

In the present invention, although the hybrid printing is performed by using the UV offset printing machine to develop a partial etching effect, the structure for excluding the use of the etching plate is not limited to the structure in which the etching is performed, This is because the main feature is that the method of photochemical reaction is used to cause the etching effect only in the fluorescent printing layer 103, not in the method of forming the physical boundary by the plate material.

That is, the present invention irradiates a UV lamp set at 120 ° C in the first irradiation step (S60) preceding the coating step (S70) to cure the region of the four-primary-color printing layer 102 to form a fluorescent print layer 103 Since the varnish is applied in the coating step S70 in the uncured state, the varnish of the coating layer 104 and the fluorescent print layer 103 ) Is induced and the etching effect is triggered only in the region of the fluorescent print layer 103. [

After the etching effect is developed as described above, the third irradiation step S90 is performed to cure and dry the fluorescent print layer 103 and the coating layer 104 to obtain a high-quality printed matter having a partial etching effect . ≪ / RTI >

Therefore, the partial etching coating method without the etch plate according to the present invention as described above can form UV inks, spot inks and varnishes having different chemical characteristics while excluding the use of a separate etching plate by using a UV offset printing machine, So that a hybrid print capable of giving a heterogeneous texture can be obtained.

Particularly, since the interface between the region where the UV ink is fixed and the region where the spot color ink is fixed is formed by the photochemical reaction, it is more clearly distinguished from the physical method using the etching plate according to the prior art, But also a great advantage in terms of workability and productivity.

In addition, the present invention can be applied to the case of performing a partial etching coating method in which a common ink containing an additive for natural drying, not a UV ink, a spot ink containing a photopolymerizable resin, and a varnish are used to exclude the etching plate of the present invention as described above Since the varnish is applied to the portion to which the general ink is applied, the etching effect can be exhibited, so that partial hybrid printing can be performed without using the etching plate. Therefore, the present invention is expected to be able to broaden its application range in the industrial field, and thus has an advantage of being highly industrially advantageous.

S10 to S40: First to fourth printing steps
S50: the fifth printing step
S60: 1st investigation stage
S70: coating step
S80: Second investigation phase
S90: Third investigation phase
101: Paper
102: 4 primary color printing layer
103: Fluorescent printing layer
104: Coating layer
105: Etching texture
111 to 114: First to fourth color plates
115: Spot plate

Claims (3)

The first to fourth printing steps of forming the four-primary-color printed layer 102 by sequentially printing UV inks of four primary colors using the first to fourth color plates 111 to 114, respectively, And a fifth printing step (S50) of printing a spot color ink of fluorescent color using a spot color plate (115) to form a fluorescent print layer (103);
A first irradiation step S60 of irradiating a UV lamp onto the paper 101 on which the four primary color printing layer 102 and the fluorescent color printing layer 103 are formed to cure the region of the four primary color printing layer 102;
A coating step S70 of removing a separate etch sheet from the paper 101 after the first irradiation step S60 and applying a varnish to form a coating layer 104;
And a second irradiating step (S80) of irradiating a UV lamp onto the paper (101) on which the coating layer (104) is formed to form an etching texture (105) only on the fluorescent printing layer (103) Partially etched coating method excluding plate material. The method according to claim 1,
In the fifth printing step (S50), the fluorescent printing layer (103) is formed by using a spot color ink containing a small amount of photopolymerizable resin compared with the UV ink;
Wherein the first irradiation step S60 is configured to set the light emitting temperature of the UV lamp to 120 DEG C to delay the curing rate of the spot color ink during the firing completion time of the UV ink, Coating method. The method according to claim 1,
In the second irradiation step S80, the light emitting temperature of the UV lamp is set to 140 deg. C to induce a photochemical reaction between the fluorescent layer 103 and the coating layer 104 that is uncured in the first irradiation step S60 Thereby forming an etching texture 105 only on the portion of the fluorescent print layer 103;
After the second irradiation step S80, a third irradiation step S90 for completely curing and drying the fluorescent print layer 103 and the coating layer 104 by setting the light emitting temperature of the UV lamp at 160 DEG C, Wherein the etch process is performed in the etching process.

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