JPH1090879A - Method for treating printing original film for color proof making method using silver halide color photosensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain a color proof with accuracy in registering without operating an original film by using a belt-like film in order to fix the exposed original. SOLUTION: On the exposure table for a color proof forming device, the original is placed on a position where the silver halide color photosensitive material is set, and a transparent film base belt is stretched and fixed on the outer frame of the exposure table so as to be aligned with pins. A guide is installed and fixed outside so that the belt of the transparent film base may not be pulled inward. Thus, the original is fixed by pins positioned at three points. And also, the end of the original rides on the transparent belt for the film base, so that there is no danger that the original hangs down and the original is caught in a machine. Consequently, the image is reproduced without being chipped. Thus, a color separation net original film ascending from an image setter is set in the color proof forming device as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for producing a color image for calibration (color proof) from a plurality of black and white halftone dot printed image films obtained by color separation and halftone image conversion in a color plate making and printing process. The present invention relates to a method for handling an original film for printing in a method for producing a color proof using a silver halide color photographic light-sensitive material which can be used.

[0002]

2. Description of the Related Art Conventionally, in a color plate making / printing process, a method for obtaining a color proof from a plurality of black and white halftone images obtained by color separation and halftone image conversion is to use a photopolymer or a diazo compound. An overlay method for forming a color image and a surprint method are known.

[0003] The overlay method is very simple, has a low production cost, and has the advantage that it can be used for calibration only by stacking four color (subtractive primary colors and black) film sheets. The drawback is that gloss is produced by the overlapping, which results in a texture different from that of the printed matter.

In the surprint method, a colored image is superimposed on a single support. A method of obtaining a colored image by toner development utilizing the tackiness of a photopolymerizable material is disclosed in US Pat. No.582,327, No.3,6
No. 07,264 and No. 3,620,726.

A color proof is obtained by transferring the image to a support by using a photosensitive colored sheet, forming an image by exposure and development, laminating another colored sheet thereon, and repeating the same process. The method of making is described in JP-B-47-27441 and JP-A-56-501217.

[0006] Further, a method of transferring each colored image obtained by exposing and developing each corresponding color separation film using a photosensitive colored sheet and forming the same on one support is disclosed in JP-A-59-97140. No. known. Since there is an advantage that a coloring material similar to the printing ink can be used as a toner for forming these images and a coloring agent for the coloring sheet, the color tone of the obtained color proof is close to that of a printed matter.

[0007] However, these methods have the drawback that in the process of producing a color proof, images must be superimposed or transferred, which requires a long operation time and high production cost.

As a solution to such a disadvantage, a method of producing a color proof by using a silver halide color photographic light-sensitive material having a white support is disclosed in Japanese Patent Application Laid-Open No. 56-13313.
Nos. 9 and 56-104335 and 62-28074
No. 6, No. 62-280747, No. 62-280748
Nos. 62-280747 and 62-280750
No. 62-28049, JP-A-2-289846
And No. 3-122637.

In this method, a plurality of color-separated black and white halftone images converted from a color original into color-separated halftone images are sequentially printed on a single sheet of color paper by a method such as close contact printing to produce color. After development, a color image formed of a dye formed imagewise from the coupler by color development is used as a calibration image. Particularly, the operability is simple, and a color proof can be obtained by simply repeating the operation of setting a halftone original film on a pin bar and pressing a button several times, so that it is used as a very useful method.

On the other hand, color separation halftone image films are increasingly being output from an imagesetter as digital technology advances. The original film output from the imagesetter has various types of pin holes such as not only conventional horizontal pin holes but also front and rear two-point pins due to the characteristics of each device manufacturer.

For a color proof system using a silver halide color photographic light-sensitive material, this is an extra step when setting a film original in an apparatus, that is, a step of attaching another film to the film original and making a punch hole. Not only increases by one, but also results in loss of register accuracy.

[0012]

Accordingly, it is an object of the present invention to provide a color proof from a color separation halftone image original film obtained by color separation and halftone image conversion using a silver halide color photographic light-sensitive material. This method uses silver halide color photographic light-sensitive materials that can easily and accurately obtain color proofs without manipulating the original film, even if the pinholes of the color-separated halftone image original film change to various types. Another object of the present invention is to provide a method of handling a halftone original film for printing in a method for producing a color proof.

[0013]

The above object of the present invention is attained by the following constitutions.

1. In a method of handling a printing original film in a method for producing a color proof using a silver halide color photographic light-sensitive material, each time a different color separation halftone original film is exchanged, the color separation halftone original film and the silver halide color photograph are replaced. This is a method for producing a color proof in which a predetermined number of color separation screen original film images are exposed by bringing a photosensitive material into close contact with each other, wherein a band-like film is used to fix the exposure original. How to handle the original film for printing in the method of creating the color proof used.

2. In a method of handling a printing original film in a method for producing a color proof using a silver halide color photographic light-sensitive material, each time a different color separation halftone original film is exchanged, the color separation halftone original film and the silver halide color photograph are replaced. A method for producing a color proof in which a predetermined number of color separation screen original film images are exposed by bringing a photosensitive material into close contact with each other, wherein a flat plate is used to fix the original for exposure. How to handle the original film for printing in the method of creating the color proof used.

3. 3. The silver halide color photographic light-sensitive material according to the above 1 or 2, wherein the band-shaped film or the flat plate has means fixed to an exposure frame, and is fixed by the fixed means. How to handle original film for printing in the method of creating color proofs.

4. 4. The silver halide color photographic light-sensitive material according to any one of the above items 1 to 3, wherein the band-shaped film or the flat plate has means for fixing a pin, and the pin is fixed. How to handle original film for printing in the method of creating color proofs.

5. 5. The silver halide color photographic light-sensitive material according to any one of items 1 to 4, wherein the band-shaped film or the flat plate is fixed to an exposure frame, and an original is fixed by the band-shaped film or the flat plate. How to handle printing original film in the method of creating a color proof by using a method.

Hereinafter, the present invention will be described in more detail.

The band-shaped film of the present invention is used to support the color separation screen original film and to accurately position the color separation screen original film via pins. Any material can be used as long as it is a film, but a PET film is preferably used effectively in terms of strength and tensile strength.
The size and thickness of the belt-shaped film are not particularly limited, but are preferably 5 to 15 cm wide and 75 to 300 μm thick in view of ease of use. There is no particular limitation on the color and the like of the strip film, but a transparent film is preferably used. There is no particular limitation on the fixing of the belt-like film, and it can be freely fixed to the exposure frame of the apparatus according to the size of the original film. There is no particular limitation on the fixing method, and the method can be freely adjusted by using a method of fixing with an adhesive tape or the like.

The flat plate according to the present invention is used for supporting the halftone original film and for accurately adjusting the position of the color separation halftone original film via pins. Any material can be used as long as the material can maintain the strength, but a plastic plate or a thin metal plate can be effectively used in view of ease of molding and weight. The size can be freely selected from the full exposure frame of the apparatus according to the size of the original film. The thickness is not particularly limited, but is preferably 5 mm or less. Particularly preferably 2
mm or less. There are no particular restrictions on the color and transparency of the flat plate. The flat plate is provided with holes according to the size of the screen original film, but if necessary, air holes are formed in a part of the flat plate to increase the adhesion between the original film and the silver halide color photographic material. Is preferably provided.

The method for fixing the flat plate is not particularly limited.
A special hole may be provided and screwed with a pin or fixed with an adhesive tape. Further, for example, a plastic film may be used as the plate.

Further, a flat plate and a strip film may be used together.

The setting of the pins in the present invention can be easily performed by a commonly used method. It is simple and preferable to set loose pins or pin bars on the strip film or flat plate with an adhesive tape.

The apparatus used in the present invention can be any apparatus as long as it is a system in which a color separation halftone film and a silver halide color photographic material are exposed in close contact. In particular, it can be effectively used for a Konica consensus device (type II, type L, type 570).

[0026]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

In the case of a three-pin document having two pins arranged on the left and right in the center of the screen and one pin arranged in the lower center of the screen.

FIG. 1 is a plan view showing an example of a comparative method (conventional type), FIG. 2 is a plan view of a strip film method showing an example of the present invention, and FIG. 3 is a flat plate showing an example of the present invention. It is a top view of a law.

The original is placed at the position where the silver halide color photographic light-sensitive material is set on the exposure table of the color proof forming apparatus, and the transparent film base band is fixed to the outer frame of the exposure table with the pins by aligning them with the pins. . Secure the guides on the outside so that the transparent film-based strip is not pulled inward. As a result, the original is fixed by the three pins. (See FIG. 2) Also, since the transparent film-based band is shaped to place the edge of the original, the original does not hang down and get caught in the machine. These results can be reproduced without missing the screen.

Further, by using a jig as shown in FIG. 3 instead of the transparent film-based band, the setting can be more easily performed.

At this time, by using a thin transparent film base of 100 μm or less for the cover sheet, the protrusions of the pins are absorbed by the recesses of the base, and the color separation net original film and the silver halide color photographic light-sensitive material are adhered to each other. Do not spoil the nature.

According to the conventional method, an extra film is stuck on the screen original film of each of the Y, M, C, and K plates,
After properly overlapping, punch holes and apply to a color proof creation device. This operation is required after each plate is baked (shown in FIG. 1).

On the other hand, in the method of the present invention, the color separation screen original film coming up from the image setter is directly set in the color proof preparation apparatus only by setting the color separation screen original film once on the color proof preparation apparatus. can do.

[0034]

According to the present invention, a method for handling a halftone original film for printing in a method for producing a color proof using a silver halide color photographic light-sensitive material according to the present invention is as follows. In the method of creating a color proof from the color separation halftone image original film obtained by the conversion, even if the pin hole of the color separation halftone original film changes to various types, it is easy without operating the color separation halftone original film A color proof can be obtained with high precision and accurate registration.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a comparative method (conventional type).

FIG. 2 is a plan view of a strip film method showing an example of the present invention.

FIG. 3 is a plan view of a flat plate method showing an example of the present invention.

Claims (5)

[Claims] 1. A method for handling a printing original film in a method for producing a color proof using a silver halide color photographic light-sensitive material, wherein each time a different color separation halftone original film is exchanged, the color separation halftone original film is replaced with a different one. A method for producing a color proof in which a predetermined number of color separation screen original film images are exposed by bringing a silver halide color photographic light-sensitive material into close contact therewith, wherein a band-like film is used for fixing the exposure original. A method of handling a printing original film in a method of producing a color proof using a color photographic photosensitive material. 2. A method of handling a printing original film in a method for producing a color proof using a silver halide color photographic light-sensitive material, wherein each time a different color separation halftone original film is exchanged, the color separation halftone original film is replaced with a different one. A method for producing a color proof in which a predetermined number of color separation screen original film images are exposed by bringing a silver halide color photographic light-sensitive material into close contact with each other, wherein a flat plate is used for fixing the exposure original. A method of handling a printing original film in a method of producing a color proof using a color photographic photosensitive material. 3. The silver halide according to claim 1, wherein the strip film or the flat plate has means fixed to an exposure frame, and is fixed by the fixing means. A method of handling a printing original film in a method of producing a color proof using a color photographic photosensitive material. 4. The silver halide according to claim 1, wherein the strip-shaped film or the flat plate has means for fixing a pin, and the pin is fixed. A method of handling a printing original film in a method of producing a color proof using a color photographic photosensitive material. 5. The halogen according to claim 1, wherein the strip film or the flat plate is fixed to an exposure frame, and the document is fixed by the strip film or the flat plate. A method of handling a printing original film in a method of producing a color proof using a silver halide color photographic light-sensitive material.