JPS62280749A - Generating method for bk print monochromatic proof - Google Patents

Abstract

PURPOSE:To shorten the processing time by generating a BK print monochromatic proof by an exposing operation of once, which has required the exposing operation of three times up to the present. CONSTITUTION:At the time of generating a flat color inspecting print, for instance, at the time of an inspecting print of only Y print, a Y print film is brought to B exposure, and thereafter, said print can be obtained by bringing G exposure and R exposure to the whole image exposure. AT the time of M print, it is made to pass through an M print positive only at the time of G exposure, and at the time of C print, it is made to pass through a C print positive only at the time of R exposure and in other case, the whole image exposure is executed, by which a flat color can be obtained by an exposure of three times. On the other hand, in the case of generating a flat proof of only positive BK print, it will suffice that an image on positive black (BK) plate is exposed once to a color sensitized material through a BK use filter 29A for whitening a wavelength distribution of a light source against the color sensitized material. In this way, the flat proof of only the BK print can be generated speedily.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for creating a black (BK) component color in a color proof. More specifically, B
The present invention relates to a method of forming a K-separated color image.

[Background of the Invention Ideally, to check the quality of cocolor printed matter, it is desirable to check the quality of printed matter printed by this machine, but it takes time and
Since this method is disadvantageous in terms of work and cost, conventionally, proof printing using a proofing machine has been used as a substitute for checking quality. Proofreading was also carried out by an external company, but due to competition in delivery times and prices in recent years, printing companies have been forced to differentiate their processes, become specialized, and
Coupled with demands for rationalization, etc., the need for so-called internal proofreading has increased, and there has been a demand for the development of a ``color proof system'' that is quick, easy, and allows stable internal proofreading.

As requested above, Cromarin (DuPont).

Color key (3M company), transfer key (3M company)
, Geve Proof (Agfa/Gevev 1), Remak Electrogram (Remak), etc., and electronic color monitor systems such as Image Conductor (Toppan) and EP-111-B (D, S
, Inc.), and a color vapor similar to the method of the present invention is "Fujichrome CB Print" by Ciba Geigy/Fuji Film.

Publicly known documents for understanding the present invention include A. Color proof system using color vapor/Print magazine 1
981 (Vol, 64) 7 P, 1 (1-P, 16B,
Plate making/printing quality control using Brunner system and Cromarin QCS C, 3M Kochprint (positive) type color proofing system D, Fuji color art system as off-press color proofing and above B-D, Japan Printing Society, 1985 Technical Committee Research Regular Meeting Text P, 6-P, 19E, JP-A-1973
6-IQ4 Coco 5 F, JP-A-56-113139 The present invention relates to the creation of a color proof using a color vapor one-way system, and the method used by Ciba-Geigy/Fuji Film Co., Ltd. is already known. Creates yellow (Y version), magenta (M version), and cyan (0 version) halftone film plates from the original color manuscript using a color scanner or a plate-making camera, and then sequentially attaches the halftone film plates to a color photosensitive material. The film is exposed to light three times under safe light for color vapor (Fuji Film: 5LG-10:IA) and then developed. The finished color proof is the same size as the halftone film version, and all of the above processing is done in a dark room, except when special light sources and color photosensitive materials are used.

Conventionally, when performing color plate inspection, a full color proof is used. In other words, each of the Y, M, and C (for B) plates is exposed to B, G, and R to obtain a full-color print, which is then compared with the original manuscript. It is difficult to check which color (or edition) it is caused by. Therefore, it is possible to make the check easier by creating a color-separated proof using a single color or a combination of two colors. In this case, three exposures of B, G, and R are required, and the same applies to the 2M plate, 0 plate, and BK plate.Especially when creating a color separation blueprint for only the BK plate, exposure of B, G, and R is required. , R must be exposed three times, which is very complicated.

The present invention was created in view of the above, and its main purpose is to clarify a method for creating a BK color separation blueprint that can quickly create a color separation blueprint only for the BK version. The above object of the present invention is to provide a method for creating a color proof by exposing an image on a transparent original obtained by color separation of a color original onto a color photosensitive material, in which an image on a positive (BK) plate is exposed to light from a light source. This is achieved by a method for producing a BK monochromatic blueprint, which is characterized by exposing a color photosensitive material once through a BK filter that whitens the wavelength distribution of the color photosensitive material.

[Example] Color Proof Creation Apparatus Next, prior to explaining the present invention, an example of a color proof production apparatus suitable for carrying out the method of the present invention will be described.

FIG. 1 is a schematic sectional view of the device, and in the figure, In
is a frame body, and optical system 20. Transport system for color photosensitive materials 0,
A developing processing system 40 is installed inside. In addition, the development processing system 4
0 may be configured in a frame separate from the frame IO and connected to a part of the color photosensitive material transport system 30, or the color photosensitive material containing the exposure agent may be stored in a light-shielding magazine or the like and separated. In the latter case, the optical system 20 may be set in the developing processing system 40 located at the
The color photosensitive material may be exposed to light by arranging a plurality of them, and then fed into a single development processing system 40 prepared separately, or conversely, a plurality of development processing systems 40 may be provided, or both may be used. In addition, it is possible to speed up the creation of color proofs by using a plurality of color proofs, and furthermore, it is possible to input the exposed color photosensitive material into the developing system 40 using a magazine or the like. There is an advantage that 40 can be used for purposes other than creating color proofs. Of course, it is also preferable to be able to input externally exposed color photosensitive material into the development processing system 40 integrated with the optical system 20, separately from the original color photosensitive material transport system. As the color light-sensitive material, negative color vapor, negative color film, positive color vapor, positive color film, etc. can be used, but an example using positive color vapor will be described below.

The color photosensitive material 50 is stored in a magazine 31 as shown in FIG.
To use the rolled material stored in the magazine and set it in the device, insert the tip of the magazine into the magazine as shown in the illustration. This is done by pushing the magazine 31 into the nip roller 2 of the conveyance system 30, which is slightly pulled out and its tip is held apart. Once the magazine 31 is set, the nip roller 32 is crimped. Once this is done, loading of the color photosensitive material 50 into the transport system 30 is completed.

By pressing the set operation button, the conveyance system 30 is activated, the color photosensitive material 50 is pulled out by a certain length, and the rear end is cut by the cutter 33. The length to be cut is controlled by measuring the feed length from the position of the cutter 33 using a timer or the amount of rotation of the conveyance roller, but the length is related to the magnification in the optical system 20, which will be described later, and is constant. For example, if the original film is A3 size and the magnification is 1:1, it will be cut to A3 size. i&, the cut color photosensitive material 50 is!
The image is transported to the exposure table 34 according to the rotation of the transport roller of the I2 transport system 0.

As shown in FIG. 3, the exposure table 34 is composed of one or more endless belts provided with a large number of small holes, and is conveyed to the front position of the exposure table 4 by the rotation of conveyance rollers. The colored photosensitive material 50 is temporarily stopped, and by operating the suction fan 5 provided on the back surface of the exposure table 34, it comes into close contact with the front surface of the exposure table 4, and preparation for exposure is completed.

Furthermore, if the color photosensitive material is located at the seam of the endless belt, there is a risk that unevenness may occur on the emulsion surface, so the sensor detects the seam and the timing is set so that the color photosensitive material is not guided to the seam. .

In FIG. 1, reference numeral 21 denotes a document table in the optical system 20, and as shown by the imaginary line, a document is set or taken out by rotating it horizontally using an operating arm.

As shown in FIGS. 4 and 5, the document table 21 is provided with a light source 22 having a light reflecting plate and two light diffusing plates in a box-shaped frame space. After tffi the original film 60 at a predetermined upper surface position of the light diffusing plate 23 using a registration bin and covering it with the Mylar sheet 24, if the vacuum pump 25 shown in FIG. 1 is operated, the light diffusing plate 23 A suction force acts through suction grooves prepared around the document film 60, and the document film 60 is sandwiched between the Mylar sheets 24 and brought into close contact with the upper surface of the light diffusing plate 2. At this time, it is more effective to squeeze the top surface of the mylar sheet 24 with a roller.

Note that, as part of the suction pipe from the vacuum pump 27 to the document table 21, the rotation shaft 28 of the document table 21 may be made hollow, or the suction pipe may be arranged separately from the rotation shaft 28. As a countermeasure against uneven illuminance due to the light source of the document table 21 (in general, the illuminance tends to be high in the center and low in the peripheral areas), the following method is taken.

a) Lower the reflectance at the center of the light reflector and increase the reflectance at the periphery (pasting paper, etc. with low reflectance at the center of the reflector,
b) Shorten the distance between the peripheral light source and the light diffuser plate to increase the amount of light in the peripheral area.

C) Arrange peripheral light sources densely.

d) Increase the amount of light from the ambient light source by increasing the voltage, etc.

e) Use a high-intensity light source in the periphery.

r) Add a small light source to the periphery.

g) The thickness of the light diffusing plate 23 is made thinner at one peripheral portion than at the central portion.

h) Attach a light-absorbing film or the like to the back side of the central light source to reduce the amount of reflected light and adjust the illuminance.

The illuminance distribution on the document table 21 is equal to the illuminance of the image projected onto the exposure table 21 through the optical system 20 shown in FIG. Adjust so that it is 1 or even.

In FIG. 5, the light source 22 of the document table 21 is a cylindrical light source such as a fluorescent lamp, and the frequency intensity distribution of the light is almost constant in the visible light region, which are arranged vertically or horizontally. A strong light source such as a xenon lamp or a halogen lamp can also be used.

In the apparatus shown in FIG. 1, the optical system 20 includes a light source 22 (
Original table 21), shutter 27. Lens 28. Filter 2'1. It takes the form of a shutter 27. The order of the lens 28 and filter 29 may be changed.Furthermore, the filter 29 is set in a filter turret as shown in FIG.
can be selected.

In addition, multiple filters are built into the lens.

It is also possible to make a selection.

The shutter 27 is fixed by a light shielding plate that partitions the internal space of the frame lO, and divides the fog light optical path into the light source side and the color photosensitive material side, and the optical path on the light source side is placed under a bright room. is possible.

In the case of the above configuration, the shutter 27 and its attachment form a plate or light shielding means.

An independent light shielding means may be prepared separately from the shutter 27, and the mounting may be made of a movable plate such as a bellows-shaped or flexible curtain. Further, a light shielding means or a light path opening/closing device may be used in conjunction with the opening/closing operation of the document table 21.

Although not shown in detail, it is also preferable that the optical system 2o incorporates an optical mechanism that enables image enlargement/reduction.

As shown in FIGS. 1 and 6, there are three filters 29 for positive color photosensitive materials: B (blue), G (green), and R (red). ! BK
A combination filter of Y (yellow), M (magenta), and C (cyan) filters is set to adjust the light source to complete white for color photosensitive materials using a 29A filter.

The spare portion 298.29C is provided with filters for exposure to color photosensitive materials having different spectral distributions, and is provided with no filters attached for maintenance purposes.

In the conventional color proof preparation method 9 using color vapor, no filter was provided for B.

Adjustment of the exposure amount corresponding to the exposure of each color separation is done by using the timer in the control unit 11 and adjusting the exposure time corresponding to each color separation, or by adjusting the exposure time of the B, G, R, and BK filters. Furthermore, when using a high-intensity light source such as a xenon lamp or halogen lamp, this can also be done by controlling the lighting time and light intensity of the light source after opening the shutter. I'll come.

Furthermore, as the document table 21, as shown in FIG. 7, a type that performs slit-type scanning exposure using a cylindrical halogen lamp as a light source can also be used. In such a case, adjust the exposure amount by adjusting the width of the slit and the amount of exposure.

This can be done by changing the scanning speed by controlling the rotational speed of the drive motor. It is also preferable to turn on a halogen lamp just before starting scanning, and to install a fan to exhaust heat.
In the drawing, the direction is vertical, but it may be horizontal.

Is the magnification of the projected image through the optical system 20 l:1?
By using a zoom lens (variable focal length lens) or the like, it is also possible to perform reduction or enlargement projection to form one image. In particular, in the case of reduction, a large size plate is reduced to create a color proof, so the area of the color sensitive material is small, it is inexpensive, and it is possible to obtain a color proof in a convenient format that is easy to see. .

After the exposure, the color photosensitive material 50 is transferred to the development processing system 40.
is discharged to the automatic developing section. It is preferable that the conveying speed of the roller in the automatic developing section and the conveying speed of the roller at the time of ejection from the photographing section be made to match, so as to avoid conveyance defects. If the speed of the roller in the photographing section is faster, a sensor is attached to the roller at the entrance of the automatic developing section, and the clutch of the roller in the photographing section is released when the color photosensitive material is bitten by the roller at the entrance of the automatic developing section. By doing so, smooth conveyance can be achieved.

The exposed color photosensitive material 50 that has entered the automatic developing section undergoes the processes of immersion, second exposure, and development in a developing tank.
It then undergoes a plumbing-free, water-free washing process where the final image is formed by bleaching, fixing, stabilizing, and drying processes.

In each of the developing, bleaching/fixing, stable 1, and stable 2 processing tanks, the respective processing solutions are constantly stirred by circulation pumps.

In addition, temperature controllers (heat exchangers) are used in developing, bleaching, and fixing tanks.
This keeps the temperature constant and stabilizes the image. Second
Exposure uses a light source of equal intensity across the visible light range to invert the development nuclei of the silver halide grains without disturbing the color balance. In addition, by inserting a transparent glass or the like between the second exposure surface and the photosensitive material, it is possible to eliminate the influence of darkening of the developer on the illuminance.

The stabilization tank consists of a stabilization tank 116 and a stabilization tank 2.
The overflow liquid from the two stable tanks enters the one stable tank. Counterflow replenishment is carried out by a sensor at the inlet of the automatic processing machine (automatic processing machine) only while the color photosensitive material is passing through, thereby maintaining the activation of the processing solution. In other words, the developer replenisher is in the developer tank, and the bleach/fixer replenisher is in the bleach/fixer tank.
The stabilizing liquid is supplied to the fixing tank from a replenishing tank using a bellows pump or the like to each of the two stabilizing tanks.

The overflowing solution is preferably separated into a bleaching/fixing solution and a stabilizing solution containing S and a color developing solution containing no silver, and then recovered.

In order to save energy, it is preferable that the heater in the dry explosion section is activated by a sensor that detects when the color photosensitive material is transported from the processing tank.

The specific configuration of each prefecture and the arrangement of each prefecture in the apparatus shown in FIG.
After placing the original in the top position of 0 and setting the original in the horizontal state shown in FIG. 21 is formed into a drawer shape and pulled out horizontally from the main body frame 10, a g draft film is set on the upper surface of the 21, pushed into the 1 main body frame 10, and exposed from the bottom to the top. 77:136, a prism or a reflector is placed in the optical path f! , it is possible to simplify the operation and make the device more compact.

Furthermore, when cut paper is used as the color photosensitive material 50 instead of one prepared in roll form, it is possible to transfer the technology of conventional printers, copying machines, etc., such as feeding and transporting the paper. It is.

Prepare color photosensitive materials of different types or sizes, and adjust the exposure magnification and type of original film (negative,
It is also preferable to make it possible to use selective pins in correspondence with positives.

[Exposure] Exposure Operation First, in order to understand the present invention, the creation of a pull color proof will be explained.

The original film 60 is a Y version (
It consists of positive plates: M (magenta), 0 (cyan), and BK (black).

To set the original film 60 on the original platen 21, insert the original film 60 into the pin provided on the upper surface of the original platen 21.
This is done by engaging a small registration hole prepared on the 0 side, but a so-called registration mark may also be used.

In creating conventional color proofs, 7th edition M edition, 0
Since each of the original film 50 for the plate and BK version was exposed individually, it was necessary to set the original film on the original table four times, that is, to expose it four times. In the method for creating a color proof using Chiha Geigy/Fuji Film Co.'s color paper described above, three exposures are performed without using a BK plate.

First, a BK plate is set on the document table 21, and a 7th plate original film is placed on top of it and exposed using a B filter.
BK version and M version are exposed with G filter, BK version and 0 version are R
By performing three exposures with a filter, it is possible to create a full-color color proof.

In other words, in the case of positive color paper, there are six layers of Y, M, and B, G, and R photosensitive layers, and only the areas that are not exposed to light are colored Y, M, and C, respectively. On the other hand, the film original has been color-separated into positive films of Y, M, and C1BK versions as shown in Figure 8, so the 7th version film and the BK version film are overlapped and exposed to B.
If it is developed as it is, it will be exposed as shown in FIG. Furthermore, when the M version film and the BK version film are exposed to G light and developed, as shown in FIG. 10, when the 0 version film and the BK version film are further exposed to R light and developed, f
The original color original is reproduced as shown in the figure below, and therefore only three exposures are required.

If the original film is created by separating the three colors of Y, M, and C, the same procedure can be followed except for the BK version.

Also, when creating a color inspection plate for color separation, for example,
When inspecting only the plate, as shown in Fig. 12, the 7th plate film is exposed to Ba light, and then the entire surface is exposed to G exposure and R exposure. In the case of a 1M plate, M is obtained only when G exposure is performed. By passing the plate positive through, and when using the 0 plate, passing through the 0 plate positive only during R exposure, and exposing the entire surface at other times, it is possible to obtain color separation with three exposures.

Now, when creating a color separation proof of only the positive BK plate, which is the main focus of the present invention, the color separation can be obtained with one W2 light using the BK filter shown in Figure 6 (see Figure 15).
(see figure). Conventional exposure equipment for creating color proofs does not have a BK filter, so BK
Also when obtaining a color proof for plate separation, use B instead of IH% light.
, G, and R three times.

When creating a color inspection plate of two or more colors, combine the above methods.For example, in the case of Y plate and M plate, in Figure 13,
It can be obtained by sandwiching a plate film.

However, if a BK version is included, W exposure cannot be used and the first
In the B, G, and R exposures shown in Figures 2 to 14, the BK version film is always passed through.

To form color images from negative Y, M, 0, and BK original film, negative color vapor is used as a color photosensitive material. The process of setting it up to the exposure table is the same as for positive color photosensitive materials.

The method for selecting films and filters is as shown in FIG. In other words, for the color-separated Y plate (negative), 1M plate (negative), 0 plate (negative), and BK plate (negative) as shown in the figure, the Y plate negative is exposed to B exposure, the M plate negative is exposed to Gi light, and the 0 plate is exposed. It is obtained by subjecting the negative to FLflj light and the BK negative to W exposure four times. This is negative color vapor Y, M,
This is because each C layer is photosensitive to B, G, and R, and the areas exposed to light develop colors of Y, M, and C, respectively.After the first exposure, when developed, the result shown in Figure 17 is It comes to show.

Similarly, in FIG. 20, the same positive image as the color original document is reproduced.

In this case, color separation can be obtained by one exposure of only the necessary plates6.For example, to obtain color separation of Y plate negative, Y
You can perform color separation on the BK plate negative once with 3g light, or you can perform color separation on the BK plate negative once with W exposure, but of course, you can use the BK plate negative as it is to perform B, G, etc. , R may be exposed three times.

If the original film is created by separating the three colors of Y, M, and C, the same procedure can be followed except for the BK version.

When performing separation of two or more colors, it is sufficient to expose the plate of the color once with the corresponding light. For example, when performing color separation inspection on a Y-plate negative and an M-plate negative, the Y-plate negative may be exposed to Ba light, and the M-plate negative may be exposed to G light.

When a BK version negative is included, W exposure of the BK version negative is included, and three exposures of B, G, and R of the BK version negative cannot be performed.

In the case of transport to the automatic development section and the automatic development section, the process is the same as for positive color photosensitive materials, except that the second exposure of the developing layer is for negative color photosensitive materials.

The same processing agents and equipment as those used for positive color sensitive materials can be used to turn off the image without inverting the image.

In the above description, the formation of a color image from an original film that has been converted into a halftone image has been described, but an image can be constructed in exactly the same way using a continuous tone color separation film that has not been formed into a halftone image. In this case, color paper with a small gamma (gamma) of the color light-sensitive material is suitable, rather than a high-value hard tone as in the case of a halftone image.

Furthermore, although a direct positive color photosensitive material is taken as an example of the positive color photosensitive material, any positive photosensitive material such as color reversal paper, silver die process paper, diffusion transfer type instant paper, etc. may be used.

[Effects of the Invention] According to the method for creating a BK single-color proof in a color proof of the present invention, a BK single-color proof can be created with one exposure operation, whereas conventionally three exposure operations were required. Since it is a rotating part, it is flexible to satisfy the request for short processing time.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing a color bruf making r& device, FIG. 2 is a perspective view of a magazine, and FIG. 3 is a perspective view of an exposure table. FIG. 4 is a perspective view of the document table, and FIG. 5 is a schematic sectional view of the document table. FIG. 6 is a schematic perspective view of the filter turret. FIG. 7 is a schematic sectional view showing another embodiment of the document table. FIGS. 8 to 20 are explanatory diagrams of the exposure or coloring mechanism. In the figure, each symbol indicates the following. 10-Frame 11-Control unit 20-Optical system 21-M stacking platform 22-Light source 23-Light diffusion plate 24-Mylar sheet 25-Vacuum pump 26-[Stacking platform rotation axis 27-Shutter 28-Lens 29 - Filter 29A - BK rough filter 9B - Filter spare part 29C - Filter spare part 30 - Transport system 31 - Magazine 32 - Nip roller 33 - Cutter 34 - Exposure stage 35 - Suction fan 40 - Developing system 50 - Color exposure Materials 1 60 - Manuscript film patent applicant Konishi Roku Photo Industry Co., Ltd. agent Patent attorney Nobuaki Sakaguchi (1 idiot) Figure 4 Figure 6 Figure 5 Figure 7 Figure 9 ts BK it 10 Figure 11 B G RBK Y M CW Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 BGRf3KYMCW Procedural amendment (voluntary) August 14, 1985

Claims (1)

[Claims] In the method of creating a color proof by exposing an image on a transparent original obtained by color separation of a color original onto a color photosensitive material, the image on a positive (BK) plate is converted into a color photosensitive material using the wavelength distribution of a light source. A method for producing a BK monochrome proof, which is characterized by exposing a color photosensitive material once through a BK filter that whitens the contrast.