JP4457220B2 - Printed matter having anti-counterfeit structure and method for determining the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a line drawing and / or dot pattern with a special micro slit pattern, which generates a warning message when illegal copying is performed using a digital color copying machine or the like, and discrimination for authenticity discrimination It is about the screen.
[0002]
[Prior art]
In recent years, there have been many cases of forgery of illegal securities that misuse peripheral devices such as high-performance digital color copiers, personal computer scanners, and printers. In order to suppress these incidents, in the world of halftone dot printed matter, a small halftone dot area that exceeds the copying capability of the copier in the printed matter is set in the printed matter so that it functions as a warning message at the time of copying. Forgery prevention technology has been used. In banknotes and various securities prints, various line drawing patterns produced by a special method called a color pattern, a line pattern, and a background pattern have been widely used as a forgery prevention technique. However, it cannot be said that such special line drawing prints have sufficient resistance to high-performance digital color copiers, and the applicant has a special line drawing structure for various line drawing prints. I have proposed several forms.
[0003]
In the previously filed method for creating a copy protection pattern and printed matter thereof (Japanese Patent Laid-Open Nos. 8-197828, 8-300800, and Japanese Patent Application No. 10-365278), the present applicant applied for banknotes and securities. For a specific area constituting a stencil pattern, a line pattern, and a background pattern, which have been widely used in various classes, “divide into two lines”, “break line”, “ Designed with a fine line structure (form) that exceeds the copying capability of a copier, such as “branch into three”, has realized a function that issues a specific warning message for illegal copying. . However, in order to realize on the printed matter a fine line shape that exceeds the copying capability of the copying machine for a specific area in the individual image line, the exposure and development conditions of the printing plate film and the printing plate It requires strict management of printing and advanced plate making and printing technology of micron order, such as thorough elimination of unstable elements such as thickening and faint lines during printing. In addition, because it is a fine line designed on the micron order, there is a tendency that the printing durability of the printing plate is slightly inferior to that of ordinary pattern printed matter, and a device for improving printing durability is desired. It was.
[0004]
The above prior art is a technique for forming a special structure (form) for a line drawing pattern such as a chromatic pattern, a line pattern, or a background pattern. Therefore, a special screen method that expresses a continuous tone image such as a human photograph etc. by continuously changing the size of the array elements such as star-shaped figures and minute characters for the array elements constituting the dot pattern It is impossible to apply the conventional special structure (form) technique to individual array elements in FIG.
[0005]
Further, in JP-A-10-1000052, using a pattern print and a discriminator having a pattern that interferes with the pattern print, the presence or absence of a moire pattern when the pattern print is superimposed on a copy, A method for discriminating copies is characterized by discriminating authenticity. However, the printed material is premised on a regular pattern that is a repetition of black equidistant stripes rising 45 degrees to the right, and it is difficult to express meaningful images such as mountains and portraits only with the pattern. It is. In addition, during the design of the overall design of a voucher, etc., the pattern part related to discrimination may protrude unnecessarily in design, so it is differentiated from other general printed materials, or the corporate image of the printed material issuer. There is a risk that the sense of quality and weight of the design, which is important for improving the quality, may be lost. In addition, there is a risk that the pattern portion relating to the discrimination that tends to protrude in the design may be easily corrected in a pinpoint manner by illegally copying the pattern portion after copying.
[0006]
As detailed above, a warning message is generated for an illegal copy, and the warning message can be easily added to a copy that has been skillfully added or modified without requiring a special machine. It is possible to deliberate and discriminate, and any curved line drawing such as a colored pattern or relief pattern with a high-class design and weight required for valuable printed matter such as banknotes, and an array of arbitrary shapes There has been a demand for a line drawing pattern or a special line drawing form for the dot pattern, to which the technology of the present invention can be applied, without destroying the harmony of the overall design also for the dot pattern consisting of elements.
[0007]
[Problems to be solved by the invention]
The present invention does not require an advanced plate-making printing technology of micron order, and the number of plate durability is not inferior to ordinary printed matter, and the above characteristics are not lost even for higher resolution of a copying machine expected in the future. For illegal copying using digital color copiers and personal computer peripherals that can be used, the line drawing and / or dot pattern drawing lines and / or dots that make up the basic image have a fine slit pattern structure in the background. It is a line drawing and / or dot pattern printed matter with a minute slit pattern structure in which a specific warning message appears by applying the arrangement direction of the slit pattern structure placed in the image portion and the message image portion differently, and in the printed matter From a substrate such as a transparent film having a line pattern image of the same pitch as the slit pattern structure placed in The determination screen is visualized only the warning message superimposed to the line image pattern printed matter, easily is an object to realize a determination method and determination screen capable authenticity discrimination.
[0008]
[Means for Solving the Problems]
The present invention has a basic image composed of a line drawing and / or a dot pattern on a substrate, and the basic image includes a background image portion and a message image portion to which at least one latent image is applied. The angle of the arrangement direction of the micro slit pattern in each line and / or dot of the line image and / or dot pattern divided and classified as the background image portion, and the at least one latent image At least two or more of the line drawings and / or dot patterns classified as message image portions with different angles in the arrangement direction of the respective slits and / or micro slit patterns in each dot Although it has a slit structure, the message image part of the basic image is difficult to see, but a warning message is visually recognized in distinction from the background image part during copying. It is printed material having a forgery prevention structure according to claim.
[0009]
Further, the printed matter has a forgery prevention structure characterized in that the micro slit pattern structure is a straight line pattern with equal intervals.
[0010]
Further, the slit width and slit pitch of the micro slit pattern in each image line and / or each dot of the line image and / or dot pattern classified as the background image portion in the basic image, and the message image portion A forgery prevention structure characterized in that the slit width and the pitch of the slits in each fine line pattern and / or each dot of the segmented line image and / or dot pattern are the same. Is a printed matter.
[0011]
Further, the printed image has a forgery prevention structure characterized in that the message image portion in the basic image is an image representing characters and symbols.
[0012]
In addition, the printed matter has a forgery prevention structure in which an image having an arbitrary gradation is expressed by continuously changing the line width and the dot diameter of each line drawing and / or dot pattern.
[0013]
The basic image is a printed matter having a forgery prevention structure characterized in that the basic pattern is a tint block pattern.
[0014]
Further, the printed matter has an anti-counterfeit structure in which at least two or more micro slit pattern structures are straight line patterns, and the pitch thereof is both the reciprocal number x of the resolution (DPI) of the image copying apparatus and less than 500 μm.
[0015]
Further, the printed matter has a forgery prevention structure in which at least two or more micro slit pattern structures are straight line patterns, and the pitch thereof is less than the reciprocal number × 2 of the resolution (DPI) of the image copying apparatus.
[0016]
Furthermore, by overlapping a discrimination screen made of a substrate such as a transparent film having a line pattern image of the same pitch as the micro slit pattern structure put in the printed matter, and rotating the discrimination screen, at least in order A method for discriminating a printed matter having a forgery prevention structure, characterized in that one or more warning messages are generated and the printed matter and the copied matter are discriminated based on the presence or absence of the warning message.
[0017]
Furthermore, the discriminating screen having a line pattern having a pitch that interferes with the image of the line pattern having the same pitch as the micro slit pattern structure placed in the printed material, and comprising a transparent film substrate for determining the authenticity of the printed material. It is a discriminator.
[0018]
Furthermore, the forgery prevention structure is characterized in that the arbitrary image expressed in the printed material is a person image, and is a face image identification card in which specific ID information corresponding to the person is entered as a message image. It is a printed matter that has.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a printed matter having a forgery preventing structure according to the present invention will be described with reference to the drawings. In the present invention, a basic image composed of a line image and / or a dot pattern, which is divided into a background image portion and a message image portion on which at least one latent image is applied, is arranged on a base material. In each of the image lines and / or dots of the section, a micro slit pattern in which the arrangement direction or width and pitch are changed is applied.
[0020]
When a printed matter having a forgery preventing structure according to the present invention is copied using a copying machine, a warning message that cannot be recognized in the original printed matter appears. In addition, since the printed matter of the present invention depends on the copying direction of the copying machine, a warning message does not appear even if the printed matter is copied depending on the pitch of the minute slit pattern provided in each image line and / or dot. In such a case, a discrimination screen made of a substrate such as a transparent film having a line pattern image having the same pitch as the slit pattern structure placed in the printed material is superimposed on the printed material. Authenticity can be reliably determined.
[0021]
As described above, the anti-counterfeiting effect is surely exhibited by applying the minute slit pattern structure to the line drawing and / or dot pattern image constituting the basic image. The present invention will be further described below with reference to examples including production steps.
[0022]
【Example】
FIG. 1 shows a basic image A that represents a human face image by continuously changing the line width and diameter of a line drawing and / or dot pattern, which is a basis for applying the micro slit pattern structure of the present invention. It is. Since the present invention is to provide a slit pattern structure within the line drawing and / or dot pattern drawing line and / or within the dot, the outline feature of the line or dot pattern in the basic image, With respect to the arrangement feature, there is no problem in the manufacturing method of the present invention and no fading in the effect of the invention. Therefore, the image used for the basic image includes various line drawings such as a mixture of lines and dots in a unit area, a wavy line pattern, a concentric circle pattern, a colored pattern, or an array pattern having minute characters as array elements. And / or a dot pattern is conceivable and is not limited to this embodiment.
[0023]
FIG. 2 is an image for a warning message that appears when copying by a copying machine or a discrimination screen is superimposed, and is composed of characters “OK” and “COPY”.
[0024]
FIG. 3 shows the intersection of the basic image A of FIG. 1 and the warning message image of FIG. 2, which is a message image portion B (OK) and a message image portion C (COPY). For the message image B, the intersection part is extracted in units of one dot.
[0025]
FIG. 4 shows an image of a part excluding the message image part B (OK) and the message image part C (COPY) from the basic image A, and is the background image part D.
[0026]
The problem is that, in the two message image portions B and C and the background image portion D, a fine slit pattern structure in a line drawing and / or dot pattern line and / or dot, ie, a filled line drawing and / or This is achieved by applying a non-printed whitened area with a gap width of several tens to several hundreds of microns that is regularly arranged in the same direction within the image of the dot pattern and / or within the dot. Is done. As in this embodiment, when an arbitrary gradation image is expressed by changing the image line width or dot diameter as in this embodiment, a minute slit pattern structure is applied to one image line or one dot. The size of the area must be constant, regardless of whether the line width or dot diameter representing the shadow part of the person's face image is large, or the line width or dot diameter representing the person highlight part. Don't be. It should be noted that the gradation of the basic image is lost if the area to which the slit pattern structure is applied is increased in accordance with the increase in the image line of the shadow portion and the dot diameter. Further, the two message image portions B and C and the background image portion D are characterized in that the arrangement directions of the minute slit pattern structures are different from each other.
[0027]
In the present invention, the pitch of the minute slit pattern structure applied to the two message image portions B and C and the background image portion D is 254 microns, the slit width is about 127 microns (at this time, the line width is about 127 microns), The arrangement direction is 0 degree in the left-right direction of the printed material, and the counterclockwise direction is plus rotation, 90 degrees for the message image part B (OK), 45 degrees for the message image part C (COPY), and for the background image part D. The fine slit pattern structure was inserted into the basic image A at 0 degree. FIG. 5 shows a schematic diagram of a line drawing and / or a dot pattern with a micro slit pattern structure obtained at this time.
[0028]
FIG. 6 is an enlarged view of the vicinity of the boundary E between the message image part B (OK) and the background image part D with the minute slit pattern structure, and the boundary between the message image part C (COPY) with the minute slit pattern structure and the background image part D. An enlarged view of the vicinity F is shown in FIG.
[0029]
As can be understood from the enlarged views of FIG. 6 and FIG. 7, the minute slit pattern structure in the background image portion and the message image portion is different only in the arrangement direction in both regions. There is no density difference in both areas of the part. Therefore, as long as normal original printed matter is observed, the warning message is not exposed. Furthermore, even the difference in the arrangement direction of the micro slit pattern structure cannot be identified with the naked eye, and even if the difference can be identified using a magnifying glass etc. With typical information, it is very difficult to restore the entire warning message.
[0030]
Based on the obtained line drawing and / or dot pattern with a fine slit pattern structure, a film for plate making is prepared using a commercially available laser plotter, and then a printing plate is prepared using a commercially available positive type PS plate. The printing machine was adjusted to the same level as ordinary lithographic offset printing using commercially available offset ink (light reddish purple) on high-quality commercially available paper, and printed matter was obtained by performing offset printing without any special adjustment. .
[0031]
FIG. 8 shows a copy obtained by copying the obtained printed matter in the map mode using a digital color copying machine (Limos 2. CF900) manufactured by Minolta. A warning message consisting of the characters “OK” and “COPY” that could not be recognized in the original printed material clearly appeared on the copy. Note that the appearance of the warning message depends on the copying (scanning) direction of the copier.
[0032]
On the other hand, in the case of a line drawing and / or dot pattern printed matter having a fine slit pattern structure in which the pitch of the straight line pattern of the plurality of slit structures is less than the reciprocal of the resolution (DPI) of the image copying apparatus × 2 (127 microns) The copy message will not generate a warning message. In such a case, it is possible to reliably determine the authenticity by overlapping the determination screens.
[0033]
Next, the moving direction of the reading unit in the copier is set to 0 degree, and the left and right direction of the original printed material placed on the glass surface of the copier is turned counterclockwise, and a warning message “OK” is displayed. ”And“ COPY ”were tested for expression, and the results are shown in FIG. The angle column in FIG. 9 shows the amount of clockwise rotation.
[0034]
In the experimental results shown in FIG. 9, those that clearly show that a warning message is expressed are indicated as ◯, those that are not clear but that can identify a warning message are indicated by △, and those that are hardly understood or cannot be identified at all are indicated by ×. Visual evaluation was performed in three stages.
[0035]
It can be seen that the angle at which the warning message appears has a certain range. Regarding the appearance of the message image part B, the warning at the time of copying is between 40 degrees and 50 degrees in the left-right direction of the printed matter with respect to the copying direction of the copier. The message is not expressed. Also for the message image portion C, it was found that the warning message does not appear when the left and right directions of the printed matter with respect to the copying direction of the copying machine are around 30 degrees and 70 degrees.
[0036]
Therefore, it is possible to design a printed matter that always generates a warning message regardless of the angle of copying, by arranging the slits in different arrangement directions in a plurality of message image portions. it can. In addition, by designing a plurality of background image portions for a single message image portion and arranging the slits in different directions in the background image, printed matter having the same effect can be obtained. Can be realized.
[0037]
In addition, the warning message appears to the observer because the reproducibility differs between the message image part and the background image part due to interference with a screen having a specific number of lines when inputting and outputting images in a digital copier. As a perceptible warning message, it is differentiated from the background image portion. Therefore, the size of the slit width, that is, Non The stroke width is not related to the suitability of the warning message. Therefore, even if the actual slit width varies with respect to the value of the slit width described in this embodiment due to unstable factors in the plate making and printing processes, there is no problem. Needless to say, the pitch of the slit designed in the image design stage is not changed by the instability factor.
[0038]
When the slit width is large, the image line width is inevitably small, and the color tone of the entire printed matter is thin. Therefore, the printed pattern is suitable for use as a background image, such as a tint block pattern or a relief pattern, in a valuable printed matter.
[0039]
Next, nine types of samples having different pitches and slit widths of minute slit pattern structures were prepared. As shown in this example, slits with various design values as shown in FIG. 10 can be obtained by simply reducing or enlarging the entire printed matter shown in FIG. The design value of the design in FIG. 5 is set to 100%, and the size is enlarged or reduced by 10% to obtain a total of 9 levels of printing designs from 30% to 110%, and the same printing method as described above. After that, 9 levels of printed matter were obtained. The obtained printed matter was subjected to a copying experiment using three types of digital color copiers manufactured by Minolta (Limos 2. CF900), Canon (CLC900), and Ricoh (imagio 4055). The experimental results are shown in FIG.
[0040]
As mentioned above, the slit width ( Non Since the line width is not related to the suitability of the warning message, the design value may be rough. In this example, as a rough guide, line Width (Picture line Part Width of ) And slit width (non-painting) line Part Width of ) Is designed to be 1: 1. Based on this design ratio, the line width is about 38 microns even at level 1, where the finest design is required. This value can be easily printed by a known method without being affected by fluctuations in the image line due to unstable factors in the plate making and printing processes.
[0041]
From the result of copying shown in FIG. 11, a good warning message was produced when copying with a copy machine other than Canon (CLC900). The effective slit design values are confirmed to be in a wide range. In Ricoh (IMAGIO4055), the effect of warning messages is more extensive than Minolta (Limos 2. CF900), but the resolution of Ricoh (IMAGIO4055) is more extensive than other copies. It is because it is higher than the machine. Because of high resolution and excellent reproducibility of details (slit structure), a warning message appears even for level 4 printed matter.
[0042]
The fine slit structure applied to each dot and each wavy line in a printed material with an original size of 50% (level 3) or less is copied as a uniform halftone solid area where the slit cannot be reproduced. . Therefore, no warning message is generated. However, in such a case, the authenticity determination can be reliably performed by overlapping the determination screens proposed in the present invention.
[0043]
The discrimination screen proposed in the present invention has an image of a line pattern of the same pitch and the pitch of the minute slit structure applied in the printed material on a substrate such as a transparent film, specifically, The image has a straight line pattern with a pitch of 127 microns and an image line width of 64 microns. In a copy in which the minute slit pattern structure is not reproduced, interference does not occur when the discrimination screens are overlapped, so that a warning message does not appear and it can be determined that it is a counterfeit. If the presence or absence of a micro slit pattern structure in a copy is inspected using a discriminating magnifier or the like, the authenticity can be discriminated. The authenticity determination can be easily and reliably performed.
[0044]
FIG. 12 shows the warning message K visualized by superimposing the discrimination screen H on the printed material G of level 3 whose original size is 50%. The discrimination screen has an image of a line pattern having the same pitch as the pitch of the minute slit structure formed in the printed material on a substrate such as a transparent film. Specifically, the pitch is 127 microns. The image has a straight line pattern image with an image line width of about 64 microns. In this example, a photosensitive photographic film was used as the base material of the discrimination screen. Further, if it is desired to avoid the confusion of the printed product image due to the superimposition of the straight line patterns on the discrimination screen, an uneven groove pattern may be formed on the transparent screen substrate.
[0045]
For line drawings and / or dot patterns with a fine slit pattern structure with a pitch of 120 microns or less and a slit width of about 60 microns, specific ID information corresponding to the basic image is displayed instead of the warning message. A latent image may be formed. In this case, even if a false micro slit structure in which the pitch, width, and angle of the slit are not the same as the original printed material is inserted using a peripheral device of a personal computer or the like, a specific, true ID for the basic image Since the information is not expressed by the discrimination screen, it is possible to realize a line drawing and / or dot pattern having cryptographic ID information that is excellent in cost and effective.
[0046]
More specifically, by continuously changing the size of array elements such as minute characters, a person's face photo is represented by a special screen method that represents an arbitrary continuous tone image, and the person is identified. ID information, for example, information such as date of birth is employed in the message image portion. For the counterfeiter, the special screen method, which is an existing technology, can forge a face photo of a person different from the printed matter with a high degree of perfection, but also memorizes the minute slit pattern structure placed inside the array element. It is difficult to forge.
[0047]
The present invention has been described based on the embodiment of the present invention. However, the present invention is not limited to this, and various other embodiments are within the scope of the technical idea described in the claims. Needless to say, there are.
[0048]
【The invention's effect】
The image line width used in the printed matter of the present invention is twice or three times as large as that of the prior art even if it is used at the minimum level. Therefore, even if some instability factors are present in the plate making and printing processes, a printed matter can be easily produced. In addition, the printing durability of the printing plate is not inferior to that of a normal printed material, and printing can be advantageously performed in terms of cost. Further, since the line width used in the present invention is at least about 40 microns and at most about 120 microns, gold or silver ink having a relatively large pigment particle diameter, which is considered difficult to print. It is also suitable for printing using as a printing ink.
[0049]
In addition, the effect of developing the latent image of the printed matter of the present invention is enormous. Although the manner of expression is dependent on the input / output scanning direction in the copying machine, a warning message is easily generated even in a digital color copying machine with the highest resolution level. Further, according to the present invention, it is possible to quickly cope with the risk of forgery accompanying the improvement in copying performance expected in the future by making the pitch and slit width of the minute slit pattern structure finer. . Even if a digital color copier with a maximum resolution level twice that of the current one appears, the slit pitch and width are set to 50% size design values (pitch 127 microns, width 63.5 microns). ) Can be easily dealt with.
[0050]
Note that at a level of approximately 50% or less, a warning message does not appear when the micro slit pattern structure exceeds the input resolution of the image input device and is output as a copy. However, the line image and the dot on the copy that does not have the micro slit pattern structure cannot interfere with the discrimination screen. Therefore, since the warning message does not appear when the discrimination screen is overlaid, it can be easily determined that it is a counterfeit.
[0051]
Further, within the range of the design value of the micro slit pattern structure at a level of 100% or less, the effect of the present invention is adopted by adopting ID information (hidden information) that can identify the basic image instead of the warning message. Is further demonstrated. When this method is adopted for identification cards with face images that use the basic image as the face image, the person's date of birth, password, etc. can be hidden through the micro slit pattern structure. Anti-counterfeiting effect is high for replacement of face images with only wobbling.
[0052]
The present invention is achieved by applying a minute slit pattern structure to an existing line drawing and / or dot pattern image called a basic image. Therefore, the line drawing designer does not take into consideration the warning message at the time of copying, the warning message that appears when the discrimination screen is superimposed, and the hidden information, and there are no special restrictions on the designer's design. In addition, any person who does not have design knowledge can create a forgery-preventing printed matter, and the work can be shared. In addition, line drawings and dot pattern designs that have already been stored in a database can be easily converted into line drawing designs that have an anti-counterfeit effect by applying a micro slit pattern structure. Excellent in properties.
[0053]
In addition, in the method of creating the anti-copying pattern and the printed matter (Japanese Patent Laid-Open Nos. 8-197828, 8-300800, and Japanese Patent Application No. 10-365278), the portion where the latent image is applied and the portion where the latent image is not applied are shown. It is necessary to make the line area equal to that of the continuous line, so that it takes time to calculate and edit the design value of the line. On the other hand, according to the present invention, as described above, since the minute slit pattern structure is simply applied to the existing image line or the newly designed image line, the editing operation is easy.
[0054]
In addition, based on the same design, simply changing the size of the entire design including the micro slit pattern structure, one will generate a warning message during copying, and the other will be an ID that uses a discrimination screen. It is possible to easily select and create two different anti-counterfeit prints with hidden information.
[Brief description of the drawings]
FIG. 1 shows a basic image A on which a fine slit pattern structure of the present invention is applied.
FIG. 2 shows an image for a warning message that appears when copying by a copying machine or a discrimination screen is overlaid.
3 shows the intersection of the basic image A of FIG. 1 and the warning message image of FIG.
FIG. 4 shows a background image portion D, which is an image of a portion obtained by excluding the message image portion B (OK) and the message image portion C (COPY) from the basic image A.
FIG. 5 shows a schematic diagram of a line drawing and / or dot pattern with a micro slit pattern structure.
FIG. 6 shows an enlarged view E in the vicinity of the boundary between the message image part B (OK) with a fine slit pattern structure and the background image part D.
FIG. 7 shows an enlarged view F in the vicinity of the boundary between a message image portion C (COPY) with a minute slit pattern structure and a background image portion D.
FIG. 8 shows a sample image of a copy.
FIG. 9 shows a visual evaluation of the degree of latent image development with changes in the scanning angle of the copying machine.
FIG. 10 shows design values at various levels with different sizes.
FIG. 11 shows the result of copying with three types of copiers.
FIG. 12 shows a method for visualizing a warning message by superimposing discrimination screens.
[Explanation of symbols]
A Basic image
B Message image B
C Message image C
D Background image part D
E Near the boundary between the message image B and the background image
F Near the boundary between the message image C and the background image
G Printed matter
H film
J Straight line pattern
K warning message

Claims (8)

  A basic image having a line drawing and / or a dot pattern is formed on a base material, and the basic image is divided into a background image portion and a message image portion having at least one latent image, A micro slit pattern composed of an image line portion and a non-image line portion is arranged in a predetermined direction in each image line and / or dot of each line image and / or dot pattern classified as a background image portion, and the at least one The minute slit pattern composed of the image line portion and the non-image line portion in each line and / or each dot of the line image and / or dot pattern classified as the message image portion subjected to the above latent image has a predetermined direction. And an angle in the arrangement direction of the micro slit pattern of the background image portion and a micro slit pattern of the message image portion to which the at least one latent image is applied. Prints of each angle of the array direction, has a forgery prevention structure different from each other. The micro slit pattern of the background image portion and the message image portion, the width of the non-image portion is 64 to 140 microns, Ri equidistant straight line pattern der width of the image area is 64 to 140 microns The printed matter having a forgery prevention structure according to claim 1, wherein a ratio of a width of the non-image portion to a width of the image portion is 1: 1 .   A line drawing and / or dot pattern line drawing segmented as a background image portion in the basic image, and / or a micro slit pattern drawing line portion comprising a line drawing portion and a non-image drawing portion included in each dot. Width and the width of the non-image portion, and the line image and / or the dot pattern in each image line and / or each dot pattern of the line image and / or dot pattern. The printed matter having an anti-counterfeit structure according to claim 1 or 2, wherein the width of the image portion of the micro slit pattern and the width of the non-image portion are the same.   4. The printed matter having an anti-counterfeit structure according to claim 1, wherein the message image portion in the basic image is an image expressing characters and symbols.   5. The image having an arbitrary gradation is expressed by continuously changing the line width and the dot diameter of each of the line drawing and / or the dot pattern. Printed matter with anti-counterfeit structure.   The printed matter having an anti-counterfeit structure according to claim 1, wherein the basic image is a tint block pattern.   A discrimination screen made of a transparent film base material having a line pattern image having the same pitch as the micro slit pattern structure placed in the print is superimposed on the printed matter according to claim 1, and the discrimination screen is A method for discriminating a printed matter having a forgery prevention structure, characterized in that at least one or more warning messages are generated in order by rotating, and the printed matter and the copied matter are discriminated based on the presence or absence of the warning message.   The arbitrary image expressed in the printed matter according to claim 1 is a human image, and is a face image identification card in which specific ID information corresponding to the person is inserted as a message image. Printed matter having a forgery prevention structure.

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