JPH01307753A - Production of film master plate for printed matter for prevention of ill use - Google Patents

Abstract

PURPOSE:To prevent ill use by taking in the image of a block copy as the digital data of a layout scanner, subjecting the digital image data to arithmetic processing to form latent image data and executing film exposing with a plotter. CONSTITUTION:The block copy 2 having the image of characters or patterns which float when copied is prepd. The image of said block copy 2 is taken as the digital image data from an input scanner into a layout scanner and is subjected to the arithmetic processing by the computer of the layout scanner, by which relatively small dots 21 is formed to either the image part 20a of the image data 20 of the block copy 2 and the background part 20b exclusive of the image part 20a and straight line sleeve 22 are formed on the other. The film exposing is then executed with, for example, the laser plotter to form the film master plate. The part of the dots 21 is not reproduced and appears white and conversely, the straight line sleeve 22 part is reproduced and appears dark in color. The ill use is prevented in this way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an abuse-proof printed matter that prevents abuse such as copying, falsification, etc. when printing gift certificates, securities, etc. Concerning the method of making film originals.

[Conventional technology]

In recent years, with the development and widespread use of improved copying machine technology, various documents such as gift certificates and securities have come to be copied in a state similar to the real Japanese ship, and fraudulent use of altered and forged documents is often carried out. It will be done.

Therefore, a latent image that is difficult to discern with the naked eye is printed on the surface of the printed matter, indicating "invalid", "copy", etc., and when the copy is made, the latent image appears, making it obvious that it is a copy. In recent years, printed materials have been developed that have the following characteristics.

Regarding the manufacturing method of such a film original plate, Japanese Patent Publication No. 62-6
No. 1943.

This method involves polymerizing a Manryoku negative film on top of an unexposed film, polymerizing a first latent image film on top of the Manryoku negative film, and then polymerizing a camouflage negative film on top of the first latent image film. to form a film group with a four-layer structure, and after giving a first exposure to the film group from above, the Manzu negative film is replaced with a halftone negative film, and the first latent image film is replaced with a second latent image. In this method, a second exposure is given after the film is replaced.

[Problem to be solved by the invention]

However, in this method, a number of films are prepared, and the exposure operation is repeated twice by stacking them, so there are problems in that the number of steps is large and it takes time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a film master for abuse-proof printed matter, which can significantly shorten the process and produce a film master in a short time.

[Means for Solving the Problems] Therefore, the present invention prepares a block copy having images of characters or patterns that appear when it is copied, and inputs the image of the block copy to a digital input scanner of a layout scanner. The digital image data is captured and stored as image data, and the computer of the layout scanner processes the digital image data so as to form halftone dots on one side of the image portion and the background portion of this image data, and a verdant green on the other side. I created latent image data and exposed it to film using a plotter.

[Effect]

Prepare a copy with an image to prevent abuse, import the image of the copy from the input scanner to the layout scanner as digital image data, and use the layout scanner's computer to process the image data and create the image part and image of the copy. A relatively small halftone dot is formed on one side of the background area excluding the background area, and parallel lines are formed on the other side.Then, the film is exposed using, for example, a laser plotter to create a film original plate. When printed matter made from this film original is run through a copying machine, the halftone dots are not reproduced and appear white, while the edges are reproduced and appear dark.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the schematic configuration of a layout scanner. This layout scanner is a scanner that is connected to a computer with a page editing function in order to perform various computer processing on image data. A draft original 2 is pasted on the input drum 1 at an angle specified by the layout designation sheet, and image data of the original is taken into the input computer 4 via the interface 3 and stored in the memory 5.

The memory 5 in which the image data has been written is separated from the input computer 4 and connected to the layout computer C, so that the image data written in the memory 5 is displayed on the display 7. The operator observes this displayed image, operates the joystick 8 to move the cursor to specify the trimming range, and indicates the position of bending and striping, and the keyboard 9 to change the magnification, line formation, plate color, etc. , net %, line %, etc.

These data are written into the memory 10, and after the writing is completed, the memory 10 is disconnected from the layout computer C and connected to the output computer 6.

As a result, the data in the memory 10 is outputted to a film 14 set on an output drum 13 via an output computer 6 and an interface 11, and further via a laser plotter 12 in the present invention.

In the present invention, the following processing is performed using such a layout scanner.

First, a draft manuscript 2 on which copy characters are drawn is pasted on the input drum 1, this image is scanned and inputted into the input computer 4 as digital image data 20 (Fig. 2), and then stored in the memory 5. The data in the memory 5 is displayed on the display 7.

In this digital image data 20, by operating the joystick 8 and the keyboard 9, a character image portion 20a with the word "copy" is designated, and the character image portion 20a, for example 133 in FIG. line 1
A relatively fine halftone dot 21 of 0% is formed, and, for example, 60 lines 1 are formed in the background part 20b other than the character image part "copy".
0% line 22 is formed. In this way, latent image data 23 in which halftone dots are formed in the text portion and vermilion is formed in the background portion.
At the same time, by operating the joystick 8 and keyboard 9, for example, a camouflage hatching pattern is created via the layout computer C, and this pattern 24 is applied to the latent image data 23. The latent image data 25 is formed with the word "copy" formed by camouflaged halftone dots and a camouflaged green pattern around it (
(Fig. 4), the camouflage shading pattern can be generated automatically by the dot generator of the layout computer, or by attaching a pattern created in advance by a copying machine etc. to the input drum of the scanner and inputting this created pattern into the computer. It is formed by The latent image data 25 is captured by the memory 10, the laser plotter 12 is operated via the output computer 6 and the interface 11, and the film 14 on the output drum 13 is exposed, thereby creating a film original.

When printing the film original plate manufactured in this way,
A latent image 26 labeled "Copy" consisting of 133 lines and 10% halftone dots incorporating a camouflage pattern, and a 60 camouflage pattern mixed in around this latent image 26.
Print A with a background part 27 consisting of 10% lines
(Figure 5).

When this printed matter A is copied using a normal copying machine, the latent image of "copy" made up of penalty marks is not reproduced and appears as a white outline, whereas the background made up of parallel lines is reproduced and becomes a dark color. The difference in brightness between the two becomes noticeable, and the word "copy" is visible (FIG. 6).

Contrary to the above example, if you print a film original with parallel lines on the latent image character area and shading on the background area, and then run it on a copying machine, the latent image made of green will be reproduced in a dark color, and the halftone dots will be reproduced in a dark color. Since the background consisting of is not reproduced and becomes a white outline, the difference in brightness between the two becomes noticeable and the word "copy" is visible.

As shown in FIG. 7, when the exposure direction 30 of the copying machine is made to match the exposure direction of the magenta on the set printed matter, the exposure effect will work and the magenta will be reproduced in a darker color.

In addition, by adjusting the relationship between the size of the halftone dots and the pitch of the green leaves and variously changing the camouflage halftone pattern, it is possible to better camouflage the latent image and make the copying machine more innovative.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the effect of being able to efficiently create a film original for preventing abuse in a short time.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a layout scanner, Figure 2 is a process diagram for importing image information from a block copy into a computer, and Figure 3
The figure is a process diagram for creating latent image data, Figure 4 is a process diagram for processing camouflaged latent image data, Figure 5 is a state diagram of a printed matter printed from the original film of the present invention, and Figure 6 is a copy of the printed matter. FIG. 7 is an explanatory diagram of the set state of printed matter to be copied. DESCRIPTION OF SYMBOLS 1... Input drum, 2... Draft manuscript, 3... Interface, 4... Input computer, 6... Output computer, 8... Joystick, 9... Keyboard, 13... ...Output drum. Applicant Yasushi Ishikawa Figure 3 Figure 4 Figure 7

Claims (1)

[Scope of Claims] 1. A block copy having an image of characters or a pattern that appears when it is copied is prepared, and the image of the block copy is captured and stored as digital image data of a layout scanner via an input scanner. , create latent image data by processing the digital image data by a computer of a layout scanner so as to form halftone dots on one side of the image portion and background portion of this image data and lines on the other side;
A method for producing a film original plate for misuse-proof printed matter, characterized in that film exposure is performed using a plotter. 2. At the same time as the latent image data is created, a camouflage hatching pattern is created by the computer of the layout scanner, and the camouflage hatching pattern is placed over the latent image data and the film is exposed by a plotter. 2. The method for producing a film original plate for abuse-proof printed matter according to claim 1.