WO2004085166A1 - Papier imprime authentifiable et procede de fabrication - Google Patents

Papier imprime authentifiable et procede de fabrication Download PDF

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Publication number
WO2004085166A1
WO2004085166A1 PCT/JP2004/003648 JP2004003648W WO2004085166A1 WO 2004085166 A1 WO2004085166 A1 WO 2004085166A1 JP 2004003648 W JP2004003648 W JP 2004003648W WO 2004085166 A1 WO2004085166 A1 WO 2004085166A1
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WO
WIPO (PCT)
Prior art keywords
image
screen
area
printed matter
per unit
Prior art date
Application number
PCT/JP2004/003648
Other languages
English (en)
Japanese (ja)
Inventor
Masato Kiuchi
Rie Fujii
Original Assignee
National Printing Bureau Incorporated Administrative Agency
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Printing Bureau Incorporated Administrative Agency filed Critical National Printing Bureau Incorporated Administrative Agency
Priority to JP2005504015A priority Critical patent/JP4389086B2/ja
Publication of WO2004085166A1 publication Critical patent/WO2004085166A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing

Definitions

  • the present invention relates to a printed matter that can be authenticated and a method for producing the same.
  • Counterfeiting and falsification prevention are important factors in printed materials such as banknotes, stock certificates, bonds, and other securities, various certificates, and important documents.
  • printed materials such as banknotes, stock certificates, bonds, and other securities, various certificates, and important documents.
  • use methods that use geometric patterns mainly composed of thin objects, or images that cannot be recognized by the naked eye and that appear when some means or action is applied. There are methods.
  • Representative examples of the geometric pattern composed of the thin strokes described above include a tint block, a colorful pattern, and a relief pattern. These geometric patterns are usually composed of a large number of very fine objects. These geometric patterns are extracted from printed matter by photoengraving equipment, and moire is generated by a copying machine. It has long been used as an effective counterfeit and forgery prevention measure because it is difficult to copy without it. In addition, it has the effect of imparting the unique design of securities to printed matter, and is still widely used in the design of securities printed matter. However, there has been a problem in that high-performance DTP systems and copiers that have emerged due to recent technological innovations are not so effective as countermeasures against counterfeiting and alteration.
  • typical examples of the method of using an image that cannot be recognized by the naked eye and appear when some means or action is applied include a method using a special image such as a copy protection image, and a fluorescent pigment.
  • a special image such as a copy protection image
  • a fluorescent pigment for example, there is a method using a special material such as a fluorescent ink containing the same.
  • a latent image is formed by the density of image lines such as halftone dots or lines, and according to the latent image camouflage method for copy prevention (for example, refer to Patent Document 1), halftone dots of 150 lines are 10%.
  • a latent image composed of a latent image an image that is difficult to recognize with the naked eye
  • a background consisting of 50% to 60% lines and about 10% lines on a white ground around the latent image.
  • a printed matter on which a latent image is formed by the density of objects such as halftone dots or lines is formed in a simple appearance such as a monochromatic plane, or formed in an irregular pattern by a camouflage pattern. Tend to be. Therefore, it is impossible to make the monochromatic printed image pattern itself with the latent image into a design that is designed like a colorful pattern or an artistic printed matter with a decorative effect. There was a problem that it was not suitable for banknotes, bonds, stocks, and other securities that often use colorful patterns.
  • a latent image formed by an object for example, the applicant of the present application has proposed a printed matter provided with a copy protection pattern as a more effective copy.
  • a periodic pattern consisting of a curvilinear aggregate pattern, a continuous line of the image where the latent image is not applied, and an image of the image where the image of the latent image is arranged at regular intervals in the reference line direction.
  • the image area of the part corresponding to one cycle consisting of one continuous image area and non-image area in the reference line direction among the fixed-period discontinuities of the part where the latent image is applied
  • a method for creating a copy protection pattern characterized in that the sum is equal to the image area of a portion corresponding to the same length as one cycle in the reference line direction among continuous lines of a portion where a latent image is not applied.
  • its printed matter for example, see Patent Document 2. This is because it is usually difficult to identify the latent image before copying, and when a copy machine is used, the pattern with the latent image is not reproduced, and the background is reproduced, so the latent image is formed. is there.
  • Patent Document 3 a printed matter in which a latent image is applied to an object pattern consisting of one or more objects with a straight line or a curved line as the basic line, and the object portion of the object pattern where no latent image is applied Is a solid line, and the image of the part where the latent image is The forked and branched lines form dashed lines.
  • This printed matter was printed with an ink containing a fluorescent pigment. When this printed matter is copied by a copier, the latent image is not copied, and the latent image becomes a visible color as the color of the print support (paper, etc.).
  • Patent Document 4 proposes an ordinary printed material consisting of a straight line or a curved line.
  • Patent Document 5 discloses a configuration in which a set of halftone dots continuously arranged at a constant period is formed, The halftone dots in the latent image portion have a different resolution from the halftone dots in the peripheral portion of the latent image, have the same dot area ratio per unit area, and have a different dot perimeter (contour length) per unit area. Also, a printed matter in which the latent image portion and the peripheral portion of the latent image are printed with colored fluorescent ink and which can be distinguished from authenticity is described. However, the structure of the object is only a print expression with a single density, and has not been able to provide continuous gradation.
  • Screening In a digital plate making system, an arithmetic process called a screening process (screening) is required to attach a continuous tone image to a printed matter.
  • Screen processing is the process of dividing an image, which is digital data with continuous gradation, into an image area and a non-image area using a screen, and expressing the image by replacing the image gradation with the image area per unit area. Processing. Since the image obtained by the screen processing is fine, it is perceived by the naked eye as shades of color.
  • the word “screen” comes from a photoengraving system that makes full use of conventional optical technology. A film with continuous gradation is exposed to a gauze-like film called a contact screen, and the blackened and transmissive areas are exposed. And a binary film (lith film).
  • the screen is used to define which area is to be the image area and the other area is to be the non-image area when the continuous tone pattern is divided into the image area and the non-image area by screen processing.
  • a screen refers to the shape (image pattern) and size (screen ruling) of an object when reproducing the continuous tone of a pattern using objects such as halftone dots and straight lines.
  • the information includes mathematical formulas and the like that define an angle (screen angle) and the like.
  • Such information is input as digital data at a convenience store, and an image having a desired continuous tone pattern is reproduced or printed on a monitor while the tone is reproduced by the image line defined by the screen. Will be displayed.
  • the screen has three elements: the screen shape, which determines the shape of the object, the number of screen lines, which determines the size per unit, and the screen angle, which determines the arrangement direction.
  • Patent Document 1 JP-A-60-87380
  • Patent Document 2 JP-A-9-1240135
  • Patent Document 3 Japanese Patent Application No. 2000-172866
  • Patent Document 4 Japanese Patent Application No. 10-315380
  • Patent Document 5 Japanese Patent Application No. 2001-62385 Summary of the Invention
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printed matter having a high anti-counterfeit and tampering prevention effect and a method of creating the same.
  • the printed matter of the present invention which can be determined as authenticity,
  • a first area in which the continuous tone is reproduced by the first object and
  • the area ratio is substantially equal to the object area ratio of the second object, and the sum L1 of object perimeters per unit area of the first object, and the unit of the second object The sum of the image perimeters per area is different from L2,
  • the first and second areas are printed using a colored and monochromatic fluorescent light.
  • the size of the first object and the second object may be in a range of 30 to 200 zm.
  • the same image area ratio is defined between the sum L 1 of the object circumferences per unit area of the first object and the sum L of the object circumferences per unit area of the second object.
  • the image area ratio per unit area in the first image varies depending on the thickness of the periodically arranged straight line or curve,
  • the image area ratio per unit area in the second object varies depending on the thickness of a straight line, a curve, or a broken line arranged at a smaller cycle than the first object. You may use it.
  • the image area ratio per unit area in the first image changes depending on the size of periodically arranged points
  • the image area ratio per unit area in the second object varies depending on the size of a point having the same shape as the first object, and in a cycle smaller than that of the first object. Lever points may be arranged.
  • the method for producing a printed matter capable of determining whether the authenticity is true or false according to the present invention includes:
  • the printed matter includes a first region in which continuous tone is reproduced by a first image, and at least one second region in which continuous tone is reproduced by a second image.
  • the object area ratio of the first object and the object area ratio of the second object are substantially equal, and the unit surface of the first object is The sum L 1 of the object circumferences per product is different from the sum L 2 of the object circumferences per unit area of the second object,
  • a first screen defining the first object used to reproduce the continuous tone of the first area; and a second screen used to reproduce the continuous tone of the second area. Creating a second screen defining each line, and
  • a second image to be processed Duplicating a second image to be processed
  • the first image in the first area is reproduced in gradation using an object defined by the first screen, and the second image in the second area is reproduced.
  • a step of obtaining the printed matter by reproducing the gradation using an image defined by the second screen and printing using a colored and monochromatic fluorescent ink; It is characterized by having.
  • the sizes of the first object and the second object are in a range of 30 to 200 zm.
  • the first screen and the second screen may be created.
  • the sum of the perimeters of the first object per unit area L1 and the perimeter of the second object per unit area Between the first screen and the first screen so that there is a relationship of L 1 ZL 2 0.3 or L 2 / L 1 0.3 at the same image area ratio between the total length L 2 and the same image area ratio.
  • the second screen may be created.
  • the image area ratio per unit area in the first image varies depending on the thickness of a periodically arranged straight line or curve.
  • the first screen is such that an image area ratio per unit area in the second image is changed by a thickness of a straight line, a curve or a dashed line arranged at a period smaller than that of the first image. And the second screen may be created.
  • the image area ratio per unit area in the first image varies depending on the size of periodically arranged points
  • the image area ratio per unit area in the second object varies depending on the size of a point having the same shape as the first object, and in a cycle smaller than that of the first object.
  • the first screen and the second screen may be created such that a lever is arranged.
  • FIG. 1A is a diagram showing a state in which printed matter P1 according to one embodiment of the present invention is visually recognized under visible light
  • FIG. 1B is a view in which this printed matter P1 is visually observed in a state irradiated with ultraviolet light.
  • FIG. 2 is a partially enlarged view of the printed matter P1 shown in FIG.
  • FIG. 3 is a diagram showing an example of an image obtained by reproducing the gradation on the screen A.
  • FIG. 4 is a diagram showing an example of an image obtained by reproducing the gradation on the screen B.
  • FIG. 5 is a diagram showing an example of an image obtained by reproducing the gradation on the screen A.
  • FIG. 6 is a diagram showing an example of an image obtained by reproducing the gradation on the screen B.
  • FIG. 7 is an enlarged view of a portion of the image shown in FIG. 5 where the image area ratio is 50%.
  • FIG. 8 is an enlarged view of a portion where the image area ratio is 50% among the objects shown in FIG.
  • FIG. 9 is a diagram illustrating an example of the printed matter P1.
  • FIG. 10 is a flowchart showing an example of a method for producing a printed matter P1 according to an embodiment of the present invention.
  • FIG. 11 is a block diagram showing an example of the configuration of an apparatus for creating a printed matter P1 according to an embodiment of the present invention.
  • FIG. 12A is a diagram showing an image of only region 1 by cutting out and removing region 2 in printed matter P1
  • FIG. 12B is a diagram showing an image of region 2 only.
  • FIG. 1 shows an example of a printed matter P1 having a gradation composed of a pattern P2 of a photograph, a painting, a textile, and the like, which can be distinguished from authenticity.
  • FIG. 1A shows an image recognized by the naked eye under visible light
  • FIG. 1B shows an image recognized by the naked eye when irradiated with ultraviolet light.
  • FIG. 2 is an enlarged view of part 3 of the printed matter P1.
  • the printed matter P1 has two areas 1 and 2, and each area 1 and 2 has a different shape, and continuous gradation is reproduced by an image having a different shape.
  • the printed matter P 1 includes an area 1 corresponding to a background part and an area 2 corresponding to some image part such as a character or a figure. At least one area 2 is sufficient. Two or more may be provided.
  • the shape of the boundary between the region 1 and the region 2 has a design different from that of the entire gradation pattern P2, for example, a design such as a character or a figure different from the background.
  • Printed matter P1 is a printed matter using a colored and monochromatic fluorescent ink.
  • a phenomenon occurs in which the light emission appears to be stronger in the area 2 than in the area 1, as shown in FIG. 1B.
  • Such a phenomenon is referred to as an ultraviolet light emission phenomenon, and an object causing the ultraviolet light emission phenomenon is referred to as an object having an ultraviolet light emission function.
  • the object forming the area 1 and the object forming the area 2 have different object patterns from each other as described above.
  • the object pattern refers to a pattern of a fixed shape of the object defined by the screen.
  • area 1 has a gray scale reproduced by an object 4 defined by an arbitrary screen (hereinafter referred to as screen A), and area 2 has another different arbitrary The gradation is reproduced from the object 5 defined by the screen (hereinafter referred to as screen B).
  • Screens A and B can reproduce continuous tones with an image area ratio of 0% to 100%. However, in order to obtain a remarkable ultraviolet light emission phenomenon, an image area ratio of about 30% to about 70% is appropriate.
  • the ratio L 1 / L 2 of the perimeter of the object constituting the area 2 to the total perimeter L 2 is less than 1 (preferably 0.3 or less), or L 2 L 1 If it is less than 1 (preferably 0.3 or less), a more remarkable ultraviolet light emission phenomenon can be obtained.
  • the total ratio L 1 1 ⁇ 2 or L 2 / L 1 of the perimeters of the image lines defined by each is less than 1, preferably 0. There are three ways to get 3 or less.
  • screen A and screen B have the same screen ruling and different screen shapes.
  • screens A and B have the same screen shape and different screen rulings.
  • screen A and screen B have different screen shapes and screen rulings.
  • the minimum object size of the object defined by the screen A or B is appropriate as a printable range, for example, about 30 to 20.
  • the shapes, sizes, and angles of the objects 4 and 5 that reproduce the gradation and the gradation reproduced in the printed matter P1 shown in FIGS. 1 and 2 are all examples. However, the present invention is not limited to this.
  • the screen A and the screen B that define an object in which an image obtained by reproducing a gradation has an ultraviolet light emitting function will be described below with reference to some examples of specific image shapes.
  • FIGS. 3 and 4 show examples of respective image lines obtained by reproducing gradation so as to have an ultraviolet light emitting function using screens A and B.
  • FIG. The screen used to define object 6 shown in FIG. 3 is screen A, and the screen used to define object 7 shown in FIG.
  • each screen angle is arbitrary.
  • the respective image area ratios in the boundary region between the region 1 and the region 2 are substantially the same,
  • an ultraviolet light emission phenomenon occurs.
  • the sum of the perimeters of the objects per unit area, L1, defined by screen A, defined by screen A, and the objects, defined by screen B, defined by screen 2 The ratio of the perimeter to the total sum L 2 L 1 / L 2 or L 2 ZL 1 must be less than 1.
  • a remarkable ultraviolet light emission phenomenon can be obtained.
  • the shape of the object 6 is a circle as shown in FIG. 3, and the shape of the object 7 is a triple circle as shown in FIG.
  • the present invention is not limited to this, and any combination may be used as long as there is a difference in the sum of the perimeters per unit area at the same image area ratio. is not.
  • an object shape in which the perimeter per unit area of the object can be easily set to a desired value there is one based on a line such as a line, a straight line, or a curve.
  • a line such as a line, a straight line, or a curve.
  • FIGS. 5 and 6 show examples of an object based on a line.
  • the screen used to define the linear object 8 shown in FIG. 5 is screen A, and the screen used to define the dashed object 9 shown in FIG.
  • the screen line number of each of the screen A, the screen; and the screen B may be, for example, approximately 150 lines per inch.
  • the screen angle is optional.
  • FIG. 7 shows an enlarged view of a portion of the object 8 where the object area ratio is 50%.
  • the screen used to define object 8 defines object 8 as a straight line whose image width increases as the image area ratio increases, and is generally called a line screen.
  • Screens that define linear object shapes, such as line screens have one-directional objects (vertical objects in the figure) in one cell (unit) connected to objects in adjacent cells. It defines a shape that tends to shorten the perimeter of the object.
  • the total sum L of the perimeter of the object per unit area a2 where one side is a is the object area 5 It is 2a at 0%.
  • the screen used to use the object 9 has a dashed shape in which the gaps are alternately arranged, and the period of the dashed line is one quarter of that of the object 8.
  • FIG. 8 shows an enlarged view of a portion of the image 9 where the image area ratio is 50%. In such an object 9, the sum L of the perimeters per unit area when the object area ratio is 50% is 8a.
  • the sum of the perimeters L 1 per unit area of the object 8 constituting the area 1 defined using the screen A and the unit of the object 9 constituting the area 2 defined using the screen B The ratio L 1 / L 2 of the perimeter to the sum of the perimeters L 2 is 0.25 at the same image area ratio. Since the above-mentioned preferable condition (L 1 ZL 2 0.3) is satisfied, a remarkable ultraviolet light emitting function is provided.
  • FIGS. 5 to 8 are merely examples, and the present invention is not limited to these shapes. It suffices that the two objects have a shape such as a straight line, a curve, or a broken line, and the sum of the perimeters per unit area of the object differs depending on the combination thereof.
  • FIG. 9 shows a printed matter P1 having an ultraviolet light emitting function.
  • Objects that reproduce the respective gradations in region 1 and region 2 have the same screen shape (dot shape). However, these objects are obtained by reproducing gradation using two screens with different numbers of screen lines, that is, different image periods.
  • the image area ratio is the highest, the perimeter of the image per unit area has the property of increasing as the number of screen lines increases.
  • the object 5 in the area 2 shown in FIG. 9 has a quarter of the cycle of the object 4 in the area 1. That is, the screen ruling of the screen used to obtain the image 5 in the area 2 is four times the screen ruling of the screen used to obtain the image 4 in the area 1. Based on such a screen ruling, when setting a combination of objects having an ultraviolet light emission function, the screen ruling of the screen A and the screen ruling of the screen B differ. And an ultraviolet light emission phenomenon is obtained.
  • the screen ruling of screen A that defines object 4 is 100 to 150 lines / inch
  • the screen ruling of screen B that defines object 5 is 400 to 600 lines / inch. It may be.
  • the objects 4 and 5 shown in FIG. 9 both have a circular shape. However, the shape of the object is not limited to a circular shape, but may be another point-like shape such as a rhombus, and the screen angle is not limited.
  • Fig. 11 shows the configuration of the creation device used to create the printed matter P1.
  • This device includes an input unit 10, an arithmetic unit 20, a storage unit 30, and an output unit 40.
  • the input unit 10 inputs various data necessary for processing, sets various conditions, and the like.
  • the operation unit 20 performs an operation such as image processing using data and conditions input from the input unit 10 or data read from the storage unit 30.
  • the storage unit 30 stores the data input by the input unit 10, the output result of the calculation unit 20, and the like.
  • the output unit 40 outputs the created image data. It is displayed on the screen of a monitor or the like, or has a function such as a printer and a printing machine, and prints out.
  • a screen A and a screen B for defining two types of objects are created (S1).
  • the procedure for creating a screen differs depending on the content and procedure of the process of outputting the gradation image I by the output unit 40, and there are a plurality of types. Broadly speaking, there are two types of processing procedures.
  • One is a method that uses a screen processing means normally provided in a film output device or an image output device such as a printing device.
  • This is a method in which a screen is inserted into a gradation image, transferred to an output device such as a film output device, and screen processing is performed by the output device to obtain an image.
  • This is hereinafter referred to as a hardware RIP method.
  • an image with a screen inserted which is information that defines an object, is given, an image is generated based on this information, and an image is generated, and the gradation is reproduced using this image.
  • An output device having an algorithm for outputting an image is required.
  • PostScript registered trademark
  • PostScript registered trademark
  • a screen is described using a function called a spot function written in the same language or an ASCII array called a threshold critical array.
  • Another method is to create a screen using screen processing software (hereinafter referred to as screen processing software) used in personal computers and the like.
  • This software inputs a screen, performs screen processing on the image, and transfers the obtained black-and-white binary image to an output device such as a film output device or a printer.
  • a method of generating a screen using such software is referred to as a software RIP method.
  • screen processing software software used for the same purpose as the screen processing means of the output device, design software for processing the obtained black and white binary image, and the like are variously developed and marketed. ing.
  • JURA Pixel registered trademark
  • JURA Pixel registered trademark
  • a desired one is selected from a combination of the two objects having the above-mentioned ultraviolet light emitting action, and necessary data is input to the input unit 10 and the arithmetic unit 20 determines the number of spots or the threshold critical array. create.
  • the method for creating the spot function or the threshold critical array is not limited.
  • a spot function which is a three-dimensional function that defines a screen shape using commercially available text editing software, is described in BossScript (registered trademark).
  • an image may be drawn using commercially available image processing software and stored in a predetermined format to obtain a threshold critical array. Screen A created And the control information of B are given to the storage unit 30 for storage.
  • An image I having an arbitrary continuous tone pattern to be obtained as a printed matter P1 is created as digital data in the arithmetic unit 20 using commercially available image processing software or the like.
  • the gradation image I is duplicated by using the arithmetic unit 20, and the same two gradation images IA and IB are prepared.
  • Region 1 is a gradation image IA
  • region 2 is a gradation image IB.
  • the images IA and IB are images having the same gradation
  • the outline of the image line called the dot gain was obtained. Blurring may occur, and the gradation of the region 1 and the gradation of the region 2 may be different.
  • the image IA is calculated using the arithmetic unit 20 so that the boundary between the region 1 and the region 2 is difficult to be visually distinguished under normal visible light. And fine adjustment of the density of the image IB (S4, S6).
  • the image area where the image area ratio corresponding to 50% in image I is equivalent to 45% in image IA and 55% in image IB, etc.
  • fine adjustment processing of the density is required so that a density difference of 10% or more is obtained.
  • the screen processing for reproducing the gradation of the image using the object defined by the screens A and B has not been performed yet.
  • fine adjustment of the density cannot be performed after the screen processing. For this reason, it is necessary to fine-adjust the density after estimating beforehand whether or not the contour blur occurs after the screen processing.
  • the clipping mask processing is performed on the image IB (S7).
  • image IB image IB
  • a method widely used in image processing can be used, and the specific cutout mask method is not limited.
  • a clipping mask processing function attached to commercially available image processing software or layout software may be used.
  • the shape of the mask corresponds to the shape of the latent image visualized by copying or irradiation with ultraviolet light.
  • the created control information of the screen A is inserted into the image IA
  • the created control information of the screen B is inserted into the image IB (S5, S8).
  • screen processing is not performed in which objects are created using the control information of screens A and B, respectively, and the images IA and IB are reproduced using the created objects.
  • the method of inserting the definition data into the image IA and the image IB is not limited. example For example, it is inserted by text editing using software that opens an image in a text format.
  • the spot function may be imported using software having a screen defining function, such as Adobe Photoshop (registered trademark) or I11 ustrator (registered trademark).
  • the image IA and the image IB are synthesized using the arithmetic unit 20 (S9).
  • mask processing of the image IB is performed by using a version of image processing software or the like, and the image IB is arranged immediately above the image IA by using commercially available layout software or the like.
  • the composition processing of the image IA and the image IB can be performed.
  • FIG. 12A shows an image IA in which the gradation of the area 1 obtained by cutting out the area 2 is reproduced using the screen A.
  • FIG. 12B shows an image IB in which the cut-out area 2 is reproduced using a screen B in gradation.
  • the area 1 in Fig. 12A and the area 2 in Fig. 12B are reproduced using the image lines defined by screens A and B, but at this stage No such screening has yet been performed.
  • the image synthesized by the calculation unit 20 is output by the output unit 40.
  • the output unit 40 for example, a film output device compatible with PostScript (registered trademark) or a plate output device may be used.
  • the output unit 40 performs screen processing upon output (S10).
  • the exposed and unexposed areas of the film (or the plate for ink application that is made from the film as an original) having a light-transmitting area and a non-light-transmitting area as a product in the intermediate process. Judgment is made, and data composed of the image area ratio is created from the data of the image composed of the continuous gradation.
  • the output unit 40 performs an exposure process on the film (or plate) based on the data (S11). Then, the exposed film (or plate surface) is developed. If the output is a film, create a printing plate based on the output film, print, and output the print.
  • the output unit 40 When performing print output, the output unit 40 performs offset printing using, for example, a colored fluorescent ink containing 25 g of fluorescent pigment with respect to 4775 g of offset ink.
  • the type of the fluorescent pigment and the content in the ink are not limited.
  • the color of the ink is not particularly limited.
  • a printing method other than offset printing may be used.
  • the output may be performed using a general-purpose printer on demand printer that can obtain a printed matter P without creating a printing plate.

Abstract

Cette invention concerne un papier imprimé. Ce papier imprimé se caractérise en ce que son ton uniforme s'obtient en faisant varier le rapport de superficie de l'élément imprimeur par zone unitaire du papier imprimé pour chaque zone unitaire, qu'il constitue un motif de photgraphie, image ou textile, que certaines régions sont composées chacune d'éléments d'impression différents du motif, que la forme de chaque région et différente de celle du motif et que les sommes des périmètres des éléments d'impression par zone unitaire des motifs d'éléments d'impression constituant les régions sont différentes les unes des autres.
PCT/JP2004/003648 2003-03-25 2004-03-18 Papier imprime authentifiable et procede de fabrication WO2004085166A1 (fr)

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JP2005504015A JP4389086B2 (ja) 2003-03-25 2004-03-18 真偽判別可能な印刷物とその作成方法

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JP2003-083202 2003-03-25
JP2003083202 2003-03-25

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010042590A (ja) * 2008-08-12 2010-02-25 Toppan Printing Co Ltd 印刷物

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11157132A (ja) * 1997-11-27 1999-06-15 Dainippon Printing Co Ltd デジタル階調画像の印刷方法および階調画像が表現された印刷物
JP2000118119A (ja) * 1998-10-20 2000-04-25 Printing Bureau Ministry Of Finance Japan 複写防止模様の作成方法及びその印刷物
WO2001094122A1 (fr) * 2000-06-09 2001-12-13 Japan As Represented By Secretary Of Agency Of Printing Bureau, Ministry Of Finance Imprime authentifiable, et procede de fabrication associe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11157132A (ja) * 1997-11-27 1999-06-15 Dainippon Printing Co Ltd デジタル階調画像の印刷方法および階調画像が表現された印刷物
JP2000118119A (ja) * 1998-10-20 2000-04-25 Printing Bureau Ministry Of Finance Japan 複写防止模様の作成方法及びその印刷物
WO2001094122A1 (fr) * 2000-06-09 2001-12-13 Japan As Represented By Secretary Of Agency Of Printing Bureau, Ministry Of Finance Imprime authentifiable, et procede de fabrication associe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010042590A (ja) * 2008-08-12 2010-02-25 Toppan Printing Co Ltd 印刷物

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