JP3952674B2 - Information hiding printed matter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information hiding printed matter, and more particularly to an information hiding printed matter that enables printing by an ink jet printer (IJP) without selecting a medium (paper base material).
[0002]
[Prior art]
Conventionally, lottery patterns such as securities numbers, letters, patterns, etc. are concealed with rubber-based ink, etc., and this information concealment layer is scratched off to scrape off the lottery pattern to determine the loss. Information concealment prints such as lottery tickets, admission tickets, and game tickets are known, and are put into practical use as so-called scratch-off tickets.
For example, as shown in FIG. 3, print data 16 is provided by characters, numbers, patterns, etc. for displaying a loss on a partial area on the base material 11 made of paper or the like, and the peeling varnish is coated so as to cover this print data A transparent resin layer 12 also serving as a scratch silver ink layer 13 (hiding layer) made of rubber-based ink mixed with metal powder such as aluminum so that the print data 16 cannot be seen on the transparent resin layer 12, and A printed layer 15 such as a pattern is provided on the top. The user of this ticket can expose the print data 16 by scraping the print layer 15 and the concealment layer 13, and can confirm whether it is lost or not.
[0003]
In this existing information concealment printed matter (scratch-off ticket, etc.), the lottery pattern (hereinafter referred to as the game part) applied to the lower layer of the concealment layer is printed by a dot printer, and the OCR number that is the management number is handled by a number printing machine ing. Both are variable by computer management. However, since the dot printing for the game portion printing has a low printing density and a low speed, both workability and printing quality are not sufficient. Although the OCR number of the management number can be printed, it is difficult to deal with barcodes and random numbers.
[0004]
Corresponding to these, there is a printing method using an ink jet printer (hereinafter referred to as IJP). This has high print density and excellent quality (resolution). Also, it has high printing processing capability and can print images of the game part in addition to barcodes. Moreover, since there is no swell (depending on the printing pressure or ink thickness) in the printing part, unevenness does not occur in the concealing layer (unevenness) If there is, information such as a game part can be visually recognized from above the concealment layer). From the above, the introduction of the IJP printing method is ideal, but there are also problems.
[0005]
That is, IJP printing uses water-based ink, but a substrate having water repellency and receiving an image must be selected. If high-quality paper is selected, the IJP ink is impregnated, so that the fixing is carried out, but the flickering (edges of characters or the like do not become straight lines or bleeding) occurs, and the print quality is deteriorated. In particular, it affects the bar code printing quality. Furthermore, when high-quality paper or the like is used, in the case of printing with low-viscosity inks such as gravure, flexo, and screen, the effect on the printing quality, such as flickering, is exerted similarly to IJP. In addition, when these are used for information concealment printed matter, in consideration of concealment from a strong light source, a paper having a high concealment property such as black paper, aluminum foil or the like is used. When ink or varnish having a viscosity is used, the varnish may permeate and the color of the concealing layer on the inside or the opposite surface may appear on the surface.
[0006]
As a means to solve such problems of high-quality paper (base material), coated paper, art paper, plastic sheet, etc. are applied to the surface to improve the surface smoothness and at the same time, "sealing" effect against penetration of varnish etc. Although it is a good idea to have this, there is a contradiction that printing by IJP will not be fixed.
[0007]
[Problems to be solved by the invention]
In addition, when printing with general resin ink, the ink is generally composed mainly of acrylic, vinyl acetate, vinyl chloride, linseed oil, polyester, etc., so IJP printing on this does not fix. There is also a problem. For this reason, it is unavoidable to take measures to cover the print by printing on the IJP print, but since the printing ink is applied on the IJP print, the print density becomes thin and the visibility becomes poor. In addition, in the case of machine reading data, there is a concern about reading failure. Therefore, IJP printing on full color printing or solid printing is impossible. Furthermore, there is a possibility of fixing the IJP print by corona discharge treatment on the paper, but it is effective only immediately after the discharge, and there is a problem in quality stability.
[0008]
Therefore, the present invention has been made in view of the above problems, and when performing printing with an ink jet printer (IJP) using water-based ink, between IJP printing and a paper base material, or between IJP printing and a base printing layer, In the meantime, an image-receiving layer capable of accepting IJP is applied by printing, and an information-hiding printed matter having a print layer configuration that does not need to be limited to paper is provided.
[0009]
[Means for Solving the Problems]
To accomplish the above object, on at least one surface region subjected to printing layer of the substrate, underlying print layer, an ink jet printer (hereinafter, referred to as IJP) image-receiving layer, printed by IJP using a water-based ink print layer applying layers successively with laminated, further peeling varnish layer thereon, the masking layer is information hiding printed material formed by sequentially stacking a picture-printed layer.
Further, the IJP image receiving layer is made of an information-hiding printed material according to claim 1, wherein the IJP image-receiving layer is made of a component in which a porous material is blended with a resin .
Furthermore, the base printing layer is printed with a printing ink in which a porous pigment and a pigment expressing an arbitrary color tone are mixed with a resin, and the base printing layer has an IJP image receiving function.
[0010]
Further, the porous material has a particle size of 0.01 μm to 100 μm, and the compounding ratio of the porous material to the resin content is in the range of 0.1% to 80%.
Further, the printing density of the base printing layer is controlled in the PCS value range of 0.01 to 0.9.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention makes it possible to accept IJP printing between IJP printing and a paper substrate, or between IJP printing and a base printing layer, when printing with an ink jet printer (IJP) using water-based ink. The image receiving layer is provided by printing, and an information-hiding printed matter having a print layer configuration that does not require any restriction on the paper is provided.
[0012]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing a cross-section of an information hiding printed matter in one embodiment of the present invention.
[0013]
As shown in the figure, the base material 1 is not limited, and the surface layer of the base material can be aluminum vapor-deposited paper, fine paper, art paper, coated paper, or plastic sheet base materials such as PVC and PET. It is. Art paper, coated paper, and plastic sheet base materials are preferred because they do not cause printing ink wrinkles and provide good print quality. It is also possible to provide a concealing effect on the strong light source by applying aluminum or a dark color layer to the intermediate layer or the front and back surfaces of the substrate.
[0014]
On this base material 1, the base printing layer 2 is printed. The printing method can be offset, gravure, flexo, screen, digital printing, etc. The ink used is not limited to vinyl chloride, vinyl acetate, urethane, acrylic, PVA, polyethylene, linseed oil, etc. In addition, there are no restrictions on the design of ruled lines, lines, solids, full colors, and the like. However, when an optical machine reading function such as OCR or bar code is applied to the IJP print applied thereon, the print density may be affected. In this case, the print portion density is set to a PCS value of 0. It is desirable to manage the density as a density value of 01 to 0.9. That is, if the density is 0.01 or less, the print density cannot be obtained and the design is not obtained, and if it is 0.9 or more, the optical mechanical reading is hindered.
[0015]
Although there is no problem with the IJP printing and concealment layer even if the underlying printing layer 2 is not provided, it is desirable to provide the underlying layer as a tampering prevention measure such as cutting and pasting IJP print data. In addition, the design is not simple, and using ruled lines, lines, etc., which are a kind of security tint block that has been implemented in the past, is a sufficient prevention measure. In addition, as a preventive effect, full-color printing can be performed, and further, the design is enhanced.
[0016]
Next, the IJP image receiving layer 3 that enables IJP reception is formed thereon by printing. However, the IJP image receiving layer 3 can also be applied between the IJP print and the substrate 1 or between the IJP print and the base print layer 2.
The IJP image receiving layer 3 is made of a resin such as polyvinyl alcohol, aqueous urethane, gelatin, agar, linseed oil, polyethylene, vinyl chloride, vinyl acetate, a copolymer thereof, acrylic, urethane or the like. A porous material such as silica gel is blended with the IJP water-based ink. This porous material has the property of adsorbing liquid instantly by capillary action.
[0017]
As this porous material, one having a particle size of 0.01 μm to 100 μm may be used. That is, if it is less than 0.01 μm, sufficient capillary action cannot be obtained, and if it exceeds 100 μm, printability cannot be obtained, so 0.01 μm to 10 μm is preferable. Moreover, the compounding ratio with respect to the resin part of this porous substance mix | blends in 0.1 to 80% of range. Preferably, it is 0.1% to 20%, and if it is 0.1% or less, a sufficient image receiving function for IJP printing cannot be obtained, and if it is 80% or more, printability cannot be obtained.
[0018]
Next, the IJP print layer 4 is provided on the IJP image receiving layer 3. As described above, the image receiving layer 3 can fix the IJP print layer. Further, a release varnish 5 is applied thereon, and the peelability when scratching (scraping) the concealing layer and the surface protection of the IJP print layer when peeled are maintained. For the printing of the release varnish, any one of gravure, screen, offset, and flexographic printing can be selected. In addition, when the base material 1 is high-quality paper, there is a penetration of this varnish. For example, when the base paper is aluminum sand, black coat sand, dark coat on the back surface, or printed paper, Sometimes it comes to the top. In this case, the whiteness of the substrate surface is lowered, the visibility is deteriorated, and the ability to read optical machines such as barcodes is also hindered. However, by applying the IJP image receiving layer 3, the IJP ink can be fixed without using high-quality paper, and if the coated paper or the like is used as the base material, the penetration of the varnish is eliminated and the problem is solved. In addition, the IJP image receiving layer itself can secure a sealing effect, and even when high-quality paper is used, a decrease in whiteness can be prevented.
[0019]
Although it is possible to apply the IJP image receiving layer 3 to the entire substrate, a printing layer is also applied to a portion where IJP printing is not performed, and this impairs the surface smoothness of the substrate paper by the IJP image receiving layer. Therefore, by performing spot printing only at the place where IJP printing is performed, it is possible to make use of both the functionality and print quality of the paper.
[0020]
Next, the masking layer 6 (scratch ink layer) is provided on the peeling varnish 5. Further, a pattern printing layer 7 is applied thereon. The pattern printing layer 7 may be overprint printing or may be overprinted in full color, and the pattern layers on the concealing layer and the substrate can be printed individually. Printing may be any of offset, gravure, flexo, screen, and digital printing. In addition, when using a low-viscosity ink for printing, it is preferable to select a paper with high surface smoothness in order to ensure quality.
[0021]
FIG. 2 is a cross-sectional view illustrating an information hiding printed matter according to another embodiment of the present invention.
The configuration of the present invention is generally the same as the configuration described above (the embodiment based on FIG. 1), except for the underlying printing layer 2A. In the above description, the IJP printability is maintained by printing the IJP image receiving layer 3 on the underprint layer 2, but as shown in FIG. 2, in this case, the IJP print suitability is previously applied to the underprint layer 2A. As described above, 0.1 to 80% of a porous pigment is blended as ink, and a pigment that expresses an arbitrary color tone is blended. The blending ratio is between 0.01 and 50% with respect to the resin content. In addition, if it is 0.01% or less, the color tone cannot be visually recognized, and if it is 50% or more, printability cannot be ensured. In addition, the ink density needs to be controlled in the same manner as described above when printing by IJP is performed by optical mechanical reading and inspection.
[0022]
In this case, the color of the ink is not limited to one color, and it is possible to print full colors or special colors by combining two or more colors. In addition, when aluminum vapor-deposited paper or colored paper is used, optical reading may be impaired due to the color or optical reflection of the paper. In this case, since the optical functionality of the ink of the base printing layer 2A is ensured by managing the printing density in advance, there is no obstacle and the paper is not limited.
[0023]
Further, in the case of FIG. 1, one printing unit is required for printing the IJP image receiving layer, but in the case of FIG. 2, since it is not a dedicated layer, it is possible to reduce one printing unit. This makes it possible to use the remaining 1 unit for base printing as in FIG. Note that the area of the IJP image receiving layer by the base printing layer 2A is 10% to 100%. That is, if it is 10% or less, sufficient IJP image receiving suitability cannot be obtained.
[0024]
【The invention's effect】
Since this invention is the above structure, there exist the following effects.
That is, it is possible to secure the image receiving ability of IJP printing with water-based ink, and at the same time, there is no limitation on the base paper to be used, and it is possible to perform various printing on the base of IJP printing.
Moreover, even if it is a base material which interferes with optical mechanical reading, there exists an outstanding effect that readability can be ensured by providing an IJP image receiving layer.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing, in section, an information hiding printed matter according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing, in section, an information hiding printed matter in another embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an example of a conventional information hiding printed matter.
[Explanation of symbols]
1, 11... Base paper 2, 2A... Base printing layer 3... IJP image receiving layer 4... IJP printing layer 5... Peeling varnish 6 .. concealing layer 7. 13 ... Information hiding layer 15 ... Print layer 16 ... Print data

Claims (5)

A base printing layer, an ink jet printer (hereinafter referred to as IJP) image receiving layer, and a printing layer to which a printing layer is applied by IJP using water-based ink are sequentially laminated in an area where a printing layer is applied on at least one surface of the substrate. Further, an information hiding printed matter obtained by further laminating a release varnish layer, a hiding layer, and a pattern printing layer thereon. 2. The information hiding printed matter according to claim 1, wherein the IJP image receiving layer comprises a component in which a porous material is blended with a resin . 2. The information according to claim 1, wherein the underprint layer is printed with a printing ink in which a porous pigment and a pigment expressing an arbitrary color tone are mixed with a resin, and the underprint layer has an IJP image receiving function. Hidden print.   2. The porous material according to claim 1, wherein the porous material has a particle size of 0.01 μm to 100 μm, and the porous material has a blending ratio with respect to a resin content of 0.1% to 80%. The information hiding printed matter according to claim 2 or 3.   The information concealed printed matter according to any one of claims 1 to 4, wherein the printing density of the undercoat printing layer is controlled in a PCS value range of 0.01 to 0.9.

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