JPH10228094A - Method for producing positive or negative film for exposing photosensitive resin plate for flexography - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy method for producing positive or negative film for a photosensitive resin plate by means of a personal computer system without depending on developed film exposed by an exclusive camera and an exclusive film output machine in the case of making a photosensitive resin plate for printing for a corrugated fiberboard. SOLUTION: Complete block copy information produced by utilizing the computer system for making a block copy for printing for the corrugated fiberboard 3 constituted by combining plotting software for plate-making 1 storing reducing and enlarging functions for correcting the distortion of a printing pattern, etc., and a scanner 2, and a recording medium for block copy information 5 is directly printed to be superimposed twice or more on film or paper by an exclusive printer for printing. What is obtained in such a way is used as the positive or negative film for the photosensitive resin plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an exposure boss or a negative film used for producing a photosensitive resin plate to be used as a plate of a cardboard printing machine in flexographic printing performed in the cardboard printing industry. It is.

[0002]

2. Description of the Related Art Conventionally, a method of manufacturing a positive or negative film for exposure uses a computer system, as shown in the process of FIG. In most cases, a method in which a document is photographed by a special camera and then developed on a dedicated photosensitive material is used as a positive or negative film for exposure.

The above-mentioned method has problems that the cost of a special camera used for photographing, a photographic film as a photosensitive material, a developing device, and the like are expensive, and that the processing is complicated and requires much labor. . For example, when a finished resin plate is loaded on a printing machine, it is necessary to take a reduced image with a special camera to prevent the distortion of the pattern caused by the curved portion of the printing press drum surface. In addition, a complicated correction process is required after photographing. In addition, when the completed positive and negative films need to be calibrated and restored, there are many cases in which it is necessary to start over from the first photographing. In recent years, CPU
Although a system for directly obtaining a positive film and a negative film by using the same has been developed, there is a problem that the cost of the system body and a dedicated heat-sensitive film is extremely high. In addition, a method has been proposed in which a printed matter printed on an OHP film or the like using a simple printer or a plotter attached to a word processor is used as a positive or negative film manuscript. It was. In particular, when exposing the photosensitive resin plate for flexographic printing which is the object of the present invention, 8 to 1
Powerful light source (light amount: 4.8 mW / c)
it is necessary to burn at m about ^2), it had the problem that not at all applicable in shading of the printed material as described above.

[0004]

SUMMARY OF THE INVENTION The present inventor has been made to solve these problems, and the object thereof is to eliminate the use of conventional complicated and skillful techniques and expensive dedicated equipment. Another object of the present invention is to provide a novel method for producing a positive and negative film for a photosensitive resin plate for flexographic printing, which is simple and its system material is very inexpensive.

[0005]

As a result of repeated studies by the present inventor to solve these problems, the conventional graphic software 1 and the scanner were used without performing the conventional work of producing a positive or negative film by photographing with a camera. 2 is used to edit 4a the monochrome composition information, and then the computer system 3
Complete original information corrected to any value in the vertical direction during printing, that is, in the circumferential direction of the printing machine drum, using proprietary plate making software that contains the know-how of pattern distortion correction at the stage of In the printing process of step 7, by overprinting two or more times directly on a film or paper with excellent dimensional stability, which has UV transmittance, a simple and inexpensive flexographic printing system can be used. The present inventors have found that a positive and negative film for a transparent resin plate can be obtained, and have completed the present invention. That is, the present invention directly converts monochrome copy information produced by the pattern processing method of the platemaking production software 1, the scanner 2, and the computer system 3 onto a film or paper having excellent dimensional stability having ultraviolet transmittance. The present invention relates to a method for producing a positive and negative film for a photosensitive resin plate for flexographic printing, characterized in that a positive for exposure and a negative film are produced by performing overprinting 7 twice or more. Further, since the present invention employs the above-described means, the composition information edited by the computer system 3 can be temporarily read and stored in the storage medium 5, and can be stored even after printing as a positive or negative film. 5 and a system capable of reediting, proofreading, etc. in a short time was provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The object of the present invention is to produce a positive and negative film for a photosensitive resin plate for flexographic printing simply and inexpensively, and its production method will be described in detail below.

In the present invention, the computer system 3 which can use the plate making software 1 and the scanner 2 is a widely used OS (Windows 95, Mac).
Since it can be used with a personal computer system equipped with "intosh" or the like, it does not require very expensive dedicated equipment required for production by a conventional method.

In the present invention, a printer or plotter for printing copy information is used, as long as it is a device having a resolution of 600 dpi or more, such as a thermal transfer system, an ink jet system, and a toner system, and a model compatible with the OS. In particular, in the research of the present invention, it was not possible to obtain a sufficient ultraviolet light shielding property by one-time printing in any of the models. A thermal transfer method using an ink ribbon (specific example: MD-2300 manufactured by Alps Electric Co., Ltd.) is advantageous in that a printed material having few holes or the like and having excellent ultraviolet light shielding properties can be obtained.
Etc.) gave the most favorable results.

The film and paper used for printing the underlay original of the present invention are films and papers having ultraviolet transmittance, excellent dimensional accuracy, and a smooth printing surface, and are specifically commercially available. OHP film, tracing paper, etc. can be used. Among them, a tracing paper having a thickness of 75 μm to 100 μm (specific examples: 10 μm) in terms of a wider ultraviolet transmittance and a wider ultraviolet transmission wavelength region than a conventionally used positive, negative film, OHP film, or the like by photography. 10,000,000 New Clintless 90
μ), the exposure time was reduced to 5 to 6 minutes, and a favorable result was obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, a system for producing a positive film for exposure of a photosensitive resin plate for flexographic printing and a negative film 8 is edited and produced on a computer screen 9 by using a drafting software 1 and a canner 2.

[0011] The edited and produced copy information is adjusted from 2% to the circumferential direction of the entire copy information in accordance with the circumferential expansion when the edit is completed and attached to the drum of the rotary press. 4
% Is automatically reduced to an arbitrary value and edited to complete information 4b. The reduction rate corresponds to the diameter of the drum of a printing press used in each corrugated cardboard printing factory and various other working conditions.

The complete information created as described above is stored in the storage medium 5 and can be called up and used and modified as needed.

The complete information produced by the editing operation 4b is sent to a dedicated print plotter 11 or a printer 12 controlled by the computer system 3 and has ultraviolet transmittance, excellent dimensional accuracy, and a printed surface. Monochrome printing is performed twice or more directly on the smooth film 6 to complete the exposure positive and negative film 8.

Therefore, the case of using the conventional special camera and the case of using the present invention are the same for the exposure positive and negative films 8.

[0015]

As described in detail above, according to the present invention,
Since the production by photographing is unnecessary, the following effects can be obtained. (1) The production and printing of a composition original for photographing becomes unnecessary. In other words, it is not necessary for the user to acquire the know-how of photographing and correction techniques in camera photographing, and the operation can be performed by an unskilled person, so that the production process can be greatly simplified. (2) Since peripheral equipment such as inexpensive personal computer systems and scanners and commercially available OHP films and tracing paper are used, special cameras for photography, films, developing devices, darkrooms and other related equipment are not required. . (3) Correction of completed exposure body and negative film,
Reproduction due to changes etc. can be done quickly and easily. As a result, there is an effect that the preparation work for exposure of the resin plate can be smoothly and inexpensively prepared, and a series of complete information for printing can be confirmed and corrected with high efficiency.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a configuration system for producing an exposure positive and negative film to which the present invention is applied.

FIG. 2 is an overview explanatory diagram of an image storage unit, an operation unit of the system, a display, a printing machine, and the like according to the embodiment of the present invention.

FIG. 3 illustrates a conventional production process.

FIG. 4 is a comparison of light-shielding characteristics by a printing machine and a comparison of ultraviolet transmittance by a printing film and the like.

[Explanation of symbols]

1. 1. Plate making software Scanner 3. Computer system 4a, 4b. Editing work 5. Storage medium 6. 7. A process for printing on a film 7.6 having a UV transmittance, excellent dimensional accuracy, and a smooth printing surface. 8. Positive for exposure, negative film Color display 10. Keyboard 11. Printing plotter 12. Printer for printing

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[Procedure amendment]

[Submission date] February 12, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Title of the Invention A method for producing a positive or negative film for exposing a photosensitive resin plate for flexographic printing.

Claims (2)

[Claims] (1) reduction for correcting distortion of a unique printed pattern, etc.
Plate-making software 1 and scanner 2 with enlargement function
The black-and-white composition information produced in the composition system for corrugated cardboard printing by the combination of the above is converted into two or more overprints 7 on a film or paper having ultraviolet transmittance and dimensional stability. A method for producing a positive and negative film for exposing a photosensitive resin plate for flexographic printing, wherein the method comprises producing a positive and negative film for exposure. 2. The monochrome image information produced by the pattern processing method of the computer system 3 according to claim 1 is output directly to a film having high smoothness or to a paper using a plotter or a thermal transfer printer. Of producing a positive or negative film for exposure for a photosensitive resin plate.