JPH028844A - Color proof forming method - Google Patents

Abstract

PURPOSE:To obtain the color proof which allows the coincidence of the color tones and gradations with the color tones and gradations of the actual printed matter by specifying the average gradients on the solid density side and low density side in the respective color forming layers of a color photographic sensitive material after a color development processing. CONSTITUTION:The color proof is so formed that the solid density (max. image density) in the respective color forming layers of the photosensitive material after the color development processing attains <=2.0 and the average gradient on the low density side attains >=1.7 at the time of exposing the transmission type black and white dot image obtd. by component color sepn. from a color original and conversion to the dot picture to the color formation method color photographic sensitive material having the density curve of a continuous tone in tight contact therewith, then subjecting said material to the color development processing. The average gradient on the low density side is defined as the absolute value of the value obtd. after the low density range 0.50-0.02 in the characteristic curve indicating the relation between an absorption density D and the log E logarithmically indicating exposures is divided by the exposure difference b-a necessary for reproduction of said range. The resulted color proof has the color tones extremely approximate to the color tones of the actual printed matter.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in plate-making printing to confirm the finished color tone and gradation, and to check errors in characters, etc., as a sample of the final color printed matter. Concerning how to create a color proof for confirmation. More specifically, the present invention relates to a method in which a transmission white halftone dot image is closely exposed to light on a chromogenic color photographic material having a continuous tone density curve, and then subjected to color development processing.

[Conventional technology]

In the field of printing plate making, from continuous tone images such as reversal film, color negative film, and color paper,
In the process of creating a printing plate consisting of an image consisting of halftone dots, a large amount of plate-making film is used to separate the colors,
Performs image compositing, etc. As a result, the work becomes complicated and a large number of mistakes occur, such as mistakes in characters and layout.

Furthermore, since changes in price text, layout changes, color changes, etc. are received from clients (orderers) at random, it is easy to ``forget to make corrections.''

It is also necessary to check in advance whether the printed matter will be finished in the desired color tone and gradation. These are collectively called proofreading.

For this reason, various systems have been announced and sold in addition to trial printing called proof printing for the purpose of these checks. Examples include those using CRT, those using non-silver salt photosensitive materials such as photopolymers and diazo, those using dry toner to form images, and electrophotography. However, these calibration systems generally require a long time to complete a single calibration, and their material costs are high.
Currently, there are problems such as poor workability, and it is not possible to provide a system that is sufficient for practical use.

On the other hand, as another method for obtaining a proof by eliminating such defects, there is a method in which a separation mesh original is printed on a color photosensitive material using a continuous gradation method using color separation light.

For example, JP-A-60-4276, JP-A-62-28074
No. 6, No. 62-280747, No. 62-280748
No. 62-280749, No. 62-280750, No. 62-280849, etc., describe a method of obtaining a calibration material on a color photosensitive material using a photographing system using a projection lens. These are so-called "bright room specifications" that allow work to be carried out in a normal room; the photosensitive material remains inside the device, and the exposure operation can be performed with a normal knife without the need for a dark room. . Therefore, it is possible to perform color calibration in a short time and at low cost, and it has better characteristics than other calibration systems.

Similarly, another method of obtaining proofs using color photosensitive materials is as described by Chesley F, Carlson Co.
From” The Carlson Proofmast
er System ”Mata Kreoni teInc
, from @Co1or Proofing System
There is a contact exposure method sold under the name ``.

In these methods, the color photosensitive material is directly exposed to the separation mesh original in close contact with the color photosensitive material, so that the gradation reproducibility is greatly improved compared to the photographic method.

[Problem to be solved by the invention]

However, when a positive-working silver halide photosensitive material is used in such a method, not only does the fog density become high because the positive-working silver halide photosensitive material tends to cause negative fog, but also a low The average gradation level on the density side tends to be low, and when used as a color proofing material for printing halftone images, the density difference between the fog density and the color density in the halftone dots will increase in areas with low halftone percentage. As a result, the net image becomes extremely blurred. As a result, it has been extremely difficult to make a correct judgment as to whether the dot percentage of a positive original is correct or incorrect from an image of a color photosensitive material.

Furthermore, in color photosensitive materials that use special dyes called color couplers, it is generally extremely important to improve sharpness, so the image density of each layer of the color photosensitive material is usually maintained at 2.0 or higher. . However,
If you use this as is as a color proof for a trial print, the color tone will be too strong and will not match the tone of the actual print, resulting in a completely different finished quality, and the color that was originally intended will be It was not possible to accurately check the situation.

Therefore, the main object of the present invention is to provide a method for creating a color proof that can closely match the color tone and gradation of an actual printed matter.

[Means to solve the problem]

The above problem was solved by subjecting the color original to component color separation and converting it into a halftone dot image, which was obtained by closely exposing a transmission type black and white halftone image to a chromogenic color photographic light-sensitive material with a continuous tone density curve. , in the method of color development processing; solid density Dra in each coloring layer of the color photographic light-sensitive material after the color development processing is 2.0 or less, and the average gradation degree on the low density side is 1.7 or more. It can be solved by doing

In the present invention, the average gradation on the low density side is defined as follows. That is, as shown in FIG. 1, in the characteristic curve showing the relationship between the absorption density and 1ogE, which is the logarithmic representation of the exposure amount, from Fog+0.50 to Fog+0.02
It is defined as the absolute value of the low density range (0,05-0,02) divided by the exposure amount difference (ba) required to reproduce this range. That is, (1) Formula % Formula % Note that b is the fogE value when Fog+0.50, a is the #ogE value when Fog+0.02, and F is the fog density value.

[For production]

In order to obtain good dot reproducibility, it is effective to lower the fog density value, but according to the present invention, if the average gradation in the low density region called foot T is set to 1.7 or more, more effective.

Further, when the solid density Dm in each coloring layer of the color photographic material is set to 2.0 or less, the color proof obtained will be very close to the color tone of the actual printed matter.

[Specific structure of the invention]

The present invention will be explained in more detail below.

In the present invention, a transmission type black and white halftone dot image obtained by separating the component colors from a color original and converting it into a halftone dot image is closely exposed to a chromogenic color photographic light-sensitive material having a continuous tone density curve. Then, in the method of color development processing, the solid density Dm in each coloring layer of the color photographic light-sensitive material after the color development processing is set to 2.0 or less. If the solid density Dm exceeds 2.0, the obtained color proof will differ in tone from the actual printed matter.

The solid density (maximum image density) Dm can be measured using various densitometers. It is difficult to define a preferable lower limit value of this solid density, especially since the density of the yellow coloring layer varies considerably depending on the filter used in the densitometer, but preferably a type using a lasoten filter such as 47B. It is preferable that the value is 0.8 or more for a type of densitometer, and 1.3 or more for a type of densitometer that uses an interference filter such as an SPI filter. Further, the concentration at this time means absorption concentration. As a method for obtaining the solid density Dra according to the present invention, methods such as reducing the amount of coupler or making the photosensitive layer thinner can be used, as is well known.

On the other hand, in the present invention, as described above, the average gradation on the low density side is 1.7 or more, more preferably 1.8 or more. The average gradation on the low density side is the dot (halftone dot) in halftone dot reproduction when creating a color proof.
The present inventors have discovered that this is a major factor that determines the sharpness of the image. The smaller this value is, the more the area around the halftone dot tends to be blurred, resulting in poorer halftone dot quality.

Especially for small dots, the area ratio of such peripheral blurring is counted at a high rate compared to the area of the halftone dot itself, which not only makes it difficult to accurately measure the halftone percentage, but also makes it difficult to accurately measure the halftone percentage. The distinction from the dot portion becomes unclear, and as a result, the sharpness of the image of the small dot portion becomes significantly inferior. Therefore, the average gradation degree on the low density side is required to be 167 or more.

The chromogenic color photosensitive material in the present invention refers to a photosensitive material in which a photosensitive silver halide emulsion contains in advance a compound (referred to as a coupler) that reacts as an oxide of a color developing agent contained in color development. Many commercially available film papers fall into this category.

The support for the photosensitive material in this case may be paper, special synthetic paper, opaque or transparent film, etc.

Exposure to obtain a photographic image may be performed using a conventional method. i.e. natural light (sunlight), tungsten fog lamps, xenon flash lamps, xenon arc lamps, fluorescent lamps,
Halogen lamp, carbon arc lamp, cathode ray tube flying spot 7, FOT (fiber optical tube)
Any of various known light sources such as a CRT such as the above can be used.

Exposure times range from 1/1000 seconds to 1 second, which is normally used in cameras, as well as exposure times shorter than 1/1000 seconds, such as 1/10' to 1 seconds using xenon flash lamps and cathode ray tubes.
Exposures of /106 seconds can be used, or exposures longer than 1 second can be used.

If necessary, the spectral composition of the light used for exposure can be adjusted using a color filter. Normal exposure is carried out for each separated black and white halftone image using the same color or its complementary color as the component color separation of the color original, but if necessary, other component colors are used to adjust the tone of the finished image. 1
Mixing in parts is optional. In this case, you can expose most of the required exposure using the color filter used for component color separation, and then perform the remaining exposure using other component color filters, or Alternatively, any method can be used, such as exposing using a combination of color filters, or exposing while rotating a filter that combines component separation color and other color filters.

Color filters used on land include various optical filters, such as gelatin filters, color filters,
An interference filter etc. can be used. Further, laser light can also be used for exposure.

The method for creating a color proof of the present invention can also be applied to a method in which a digital signal is directly recorded as an image using a laser beam or the like, rather than a method in which a transmission-type separated black and white halftone dot image is closely exposed. In recent years, when creating transmission-type separated black-and-white halftone images, it has become common practice to process digital signals and record them using a laser output device called a scanner. It is possible to obtain similar results by outputting. At this time, correction can be added to the digital signal for the purpose of correcting the finished color tone.

Furthermore, when creating the color proof of the present invention, it is also possible to change only the contact exposure portion and perform photographic exposure.

However, in the photographing system, due to the method of photographing, lens flare and the like are added, making it difficult to obtain good halftone reproduction. In other words, a phenomenon occurs in which the dots do not appear or are crushed on the small dot and large black sides, respectively. Therefore, the apparent average gradation becomes soft, which is not very desirable as a color proof material where tone is important.

On the other hand, according to the present invention, the average gradation degree on the low density side is set to 1.7.
In this case, it is desirable that the average gradation T of the entire characteristic curve (the slope of the linear portion of the characteristic curve) be 2.0 or more, preferably 2.1 or more. By maintaining such a high average gradation level, the sharpness of the halftone dots (the difference in density between the middle of the halftone dots and the background fog, which is called sharpness), which is required for a photosensitive material that produces halftone images, which is conventionally known as monochrome film, is maintained. or,
Roughness around the halftone dots can be maintained well.

In order to have such a high average gradation, it is necessary to make the silver halide emulsion grains monodisperse, make them monomorphic (to prevent the formation of mixed crystals, change the halogen composition ratio and the temperature and environment during crystal growth to increase the growth rate). It is preferable to control the
The double jet method disclosed in No. 0, No. 54-65521, etc. can be used. In addition, JP-A-54-158
The premix method described in No. 220 and the like can also be used.

Furthermore, the characteristic curve of the silver halide emulsion itself may be actively cut by using an emulsion using a 2-equivalent coupler or by using various antifoggants, stabilizers, etc.

As an antifoggant and a stabilizer, U.S. Patent No. 2.713
．． No. 541, No. 2,743.180, No. 2,743.
Pentazaindenes described in US Pat. No. 2,716.062, US Pat. No. 2,444,607, US Pat.
, No. 444.605, No. 2,756,147, No. 2,
No. 835,581, No. 2,852,375, Research Disclosure
sure) Tetrazaindenes described in No. 14851, triazaindenes described in U.S. Pat. azaindenes; U.S. Pat. Nos. 2,131,038 and 3,342.
596 and 3,954,478, biryllium salts described in U.S. Patent No. 3,148.067, and phosphonium salts described in Japanese Patent Publication No. 50-40665 Onium salts: U.S. Patent No. 2,403.927, U.S. Pat. No. 3.266,897, U.S. Pat.
Mercaptotetrazoles, mercaptotriazoles, and mercaptodiazoles described in U.S. Pat. No. 59-71047, mercaptothiazoles described in U.S. Pat.
Mercaptobenzthiazoles and mercaptobenzimidazoles described in No. 7, U.S. Patent No. 2,843,
Mercaptooxadiazoles described in No. 491,
Mercapto-substituted heterocyclic compounds such as mercaptothiadiazoles described in U.S. Pat. No. 3,364,028; U.S. Pat.
Catechols described in No. 0256, Special Publication No. 56-4
Resorcinols described in No. 4413 and Japanese Patent Publication No. 43
-4133; polyhydroxybenzenes such as gallic acid ester; tetrazoles described in West German Patent No. 1,189,380; US Patent No. 3,157;
509, the triazoles described in U.S. Pat.
Henztriazoles described in No. 704.721;
urazoles described in U.S. Patent No. 3,287,135, pyrazoles described in U.S. Patent No. 3,106,467, indazoles described in U.S. Patent No. 2,271,229, and Azoles such as polymerized henztriazoles described in Japanese Patent No. 59-9084'4, pyrimidines described in U.S. Pat. No. 3,161,515, and pyrimidines described in U.S. Pat. No. 2,751,297. 3-pyrazolidones, and U.S. Pat. No. 3,021
Heterocyclic compounds such as polymerized pyrrolidones, that is, polyvinylpyrrolidones, described in No.
-130929, 59-137945, 140
445, British Patent No. 1.356,142, U.S. Patent No. 3,575,699, British Patent No. 3.649,267, etc.;
Sulfinic acid and sulfonic acid derivatives described in U.S. Pat. No. 047,393; U.S. Pat.
No. 839,405, No. 2,488,709, No. 2.7
There are inorganic salts described in No. 28□663.

Various photographic additives may optionally be added to the above silver halide emulsion. Other additives used depending on the purpose in the present invention include wetting agents such as dihydroxyalkanes, and physical property improvers such as combinations of alkyl acrylates or alkyl methacrylates with acrylic acid or methacrylic acid. Water-acidic core particulate polymeric substances obtained by emulsion polymerization of polymers, styrene-maleic acid copolymers, styrene-maleic anhydride half-alkyl ester copolymers, etc. are suitable, and as coating aids, e.g. saponin,
Includes polyethylene glycol lauryl ether, etc. Other photographic additives include gelatin plasticizers, surfactants, ultraviolet absorbers, pH adjusters, antioxidants, antistatic agents, thickeners, graininess improvers, dyes, mordants, brighteners, and development speed. The use of conditioning agents, matting agents, etc. is optional.

In addition, in order to increase the average gradation level and improve spot reproducibility, anti-irradiation dyes are added to the photosensitive layer.
When used as a reflective image, it is effective to provide an antihalation layer or the like.

In the present invention, the color developing solution used for color development is a color developing solution that does not substantially contain a silver halide solvent. Examples of the developer that can be used in the acid color developer include common color developers. Preferred color developing agents are aromatic primary amino compounds, typical examples of which include p-phenylenediamines and p-aminophenols. For example, aminophenol, N-methyl-aminophenol,
N,N-diethyl-p-phenylenediamine, 4-amino-3-methyl-N-ethyl-N-(β-methanesulfonamidoethyl)aniline, 4-amino-3-methyl-
N-ethyl-N-(β-hydroxyethyl)aniline, 4
-amino-3-methyl-N,N-diethyl-p-phenylenediamine, 4-amino-3-methyl-N-ethyl-
Examples include N-β-methoxyethyl-p-phenylenediamine. These developers may be included in the emulsion in advance and allowed to act on the silver halide during immersion in a high pH aqueous solution.

The amount of these aromatic primary amino compounds to be used varies depending on the type of photosensitive material, but it is practically easy to determine.
It may be used within a range of 0.7 mol.

In the present invention, specific means for increasing the average gradation degree in the low density region to 1°7 or more, preferably 1.8 or more include using a monodispersed silver halide emulsion and using pyrazolidone, which is a heterocyclic developing agent. An example of this is to add a very small amount of the system to the developer. Specifically, the amount added here is 40 to 200 cm per liter of developer, preferably 5
It is preferable to add 0 to 100 hours. Virapritone compounds are compounds with a pyrazolidone ring as the core, and specifically include 1-phenyl-3-pyrazolidone, 1p-)dyl-3-pyrazolidone, 5-phenyl-3-pyrazolidone, and 5-methyl-3-pyrazolidone. Pyrazolidone, t-p-chlorophenyl-3-pyrazolidone, 1-phenyl-5-phenyl-3-pyrazolitone, 1-m-) true 3-pyrazolidone, ■-phenyl-5-methyl-3-pyrazolidone, 1
-p-) Ryl-5-phenyl-3-pyrazolidone, 1-
p-methoxyphenyl-3-pyrazolidone, l-acetamidophenyl-3-pyrazolidone, 1-phenyl-2
-acetyl-4,4-dimethyl-3-pyrazolidone, l
-phenyl-4,4-dimethyl-3-virapritone 1,
l-m-p-aminophenyl-4-methyl-4-propyl-3-pyrazolidone, 1-o-chlorophenyl-4-
Methyl-4-ethyl-3-pyrazolidone 1.1-(p-
β-hydroxyethylphenyl)-4,4-dimethyl3
-pyrazolidone 1.1-1)-hydroxyphenyl-4
, 4-dimethyl-3-pyrazolidone, 1-p-tolyl-
4,4-dimethyl-3-pyrazolidone, 1-(7-hydroxy-2-naphthyl)-4-methyl-4-m-propyl-3-pyrazolidone, 1-p-diphenyl-4,4-
Dimethyl-3-pyrazolidone, 1-(p-β-hydroxyethylphenyl)-3-pyrazolidone, 1-0-tolyl-3-pyrazolidone, 1-0-)liru-4.4-dimethyl-3-pyrazolidone 1.1 -Phenyl-4-methyl-3-pyrazolidone, 4-hydroxy-4-methyl-1
-Phenyl-3-pyrazolidone, 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, 4.
Examples include 4-dihydroxymethyl-1-phenyl-3-pyrazolidone.

It is known to add such a pyrazolidone compound to a monochrome developer as an auxiliary developing agent. In general, pyrazolidone compounds are acute developing agents, and therefore the high-density area and the low-density area are developed almost simultaneously, resulting in a soft tone. The PQ developer utilizes this super-additivity, combining this with a slow developing agent that rapidly develops only high-density areas and extremely slows development of low-density areas, and is currently widely used as a monochrome developer. It's being used.

The role of the pyrazolidone compound in such a PQ developer is to accelerate the development of low concentration areas. In the present invention, by adding a small amount of a pyrazolidone compound to a color developer consisting of an acute developing agent such as P-phenylenediamines and P-aminephenols, the effect of suppressing low density areas can be obtained. This is an effect that could not have been predicted in the past. In addition, the amount of the pyrazolidone compound added here is the same as that of ordinary P.
The amount is considerably smaller than that of Q developer.

If the amount of pyrazolidone compound added exceeds 200 μg per liter of developer, the color tone becomes cloudy, and the magenta coupler in particular tends to become cloudy, giving the overall color tone a grayish tinge. (Ru.

If the amount added does not exceed 40μ, the effect will be small.
There is virtually no effect of the addition. Further, in order to avoid clouding the color tone and to prevent processing fluctuations during long-term continuous use, it is particularly preferable to limit the amount added to 100 μm or less.

The color developer used in the present invention is particularly effective for direct positive color photosensitive materials. Color anti-glare materials processed with a color developer containing an appropriate amount of pyrazolidone compound have significantly reduced fogging compared to those processed with a normal developer, and the average gradation in the low density area has been reduced to 1. It is possible to make it 7 or more.

Additionally, the color developer may contain specific antifoggants and development inhibitors.

The various additives added to these color developing solutions as necessary include, for example, alkali metal or ammonium hydroxides, carbonates, phosphates, pH adjusters or buffers that maintain the pH at a constant value. (For example, weak acids and weak bases such as acetic acid and boric acid, and their salts), development accelerators such as pyridinium compounds, cationic compounds, potassium nitrate and sodium nitrate, polyethylene glycol condensates,
Phenyl cellosolve, phenyl calpitol, alkyl cellosolve, phenyl calpitol, dialkyl formamide, alkyl phosphates and their derivatives, nonionic compounds such as polythioethers, polymer compounds with sulfide esters, and other organic amines such as pyridine and ethanolamine. , benzyl alcohol, etc.

The working temperature of the color developing solution used in the present invention is usually 20
℃~70℃, preferably 30℃~45℃.

Additives to the color developer used in the present invention include, in addition to the above, anti-stain agents, anti-sludge agents, interlayer effect promoters, preservatives (e.g. sulfites, acid sulfites, hydroxylamine hydrochloride, form sulfide, alkanolamine sulfide adducts, etc.). In addition, chelating agents include phosphates such as polyphosphates, aminopolycarboxylic acids such as nitrilotriacetic acid and 13-diamine-2-propatoltetraacetic acid, oxycarboxylic acids such as citric acid and gluconic acid, 1-hydroxyethylidene, 1.1-diphosphonisocando and the like. It is also possible to use lithium sulfate as a chelating agent, and these chelating agents may be combined.

Various methods can be used to transport the photosensitive material during processing, and various types of processing equipment can be used accordingly. For example, there are various types such as a hanger type, a cine type, and a roller conveyance type.

Furthermore, conventionally, when processing an exposed photosensitive material with an automatic processor, a method has been used in which the photosensitive material is processed while replenishing a processing solution depending on the photosensitive material to be processed, but in the present invention, When using a liquid replenisher kit, each part of the kit may be replenished separately. In addition, methods have been developed to reuse processing solutions and to recover chemicals that are important in terms of pollution or resources, such as developing agents and heavy metals. May be used.

〔Example〕

Next, examples will be shown.

(Example 1) Preparation of emulsion Equimolar amounts of silver nitrate aqueous solution and potassium bromide aqueous solution were added and mixed at 60°C by double jet method while maintaining I) Ag at 7. .20μ
A cubic silver bromide grain emulsion (A) of m was obtained. Next, this emulsion (A) was used as a core particle, and a silver nitrate aqueous solution and a sodium chloride aqueous solution were further added at 50°C by a double jet method.
Add at the same time while maintaining 1g 6, average particle size 0.2
A cubic core/shell type emulsion (B) of 5 μm was obtained.

Under the same mixing conditions as emulsion (A), the average grain size was 0.35 μm.
A cubic silver bromide emulsion (C) was obtained. Next, this emulsion (
C) was used as a core particle and further grown while simultaneously adding a silver nitrate aqueous solution and a sodium chloride aqueous solution at 50° C. and pAg 6 to obtain a cubic core/shell type emulsion (D) having an average grain size of 0.45 μm.

A cubic silver bromide emulsion (E) having an average grain size of 0.6 μm was obtained under the same mixing conditions as for emulsion (A). Furthermore, this emulsion (E)
Simultaneously add silver nitrate aqueous solution and sodium chloride aqueous solution (5
0°C, pAg 6) A cubic core/shell type emulsion (F) with an average grain size of 0.75 μm was obtained.

As a result of X-ray diffraction measurements of the above emulsions (B), (D), and (F), two distinct peaks corresponding to the core and shell, respectively, appeared in the diffraction curves (not shown). It was confirmed that the emulsion grains had a layered structure.

The mixing ratio of these three emulsions is B:D:F=1:2:
1) A multilayer color light-sensitive material was prepared by adding sensitizing dyes, couplers, etc. as described below.

The amount of coupler added was adjusted so that the color density was the same in each layer and approximately 2.0 or less.

<Sample Preparation> Samples 1 to 4 were prepared by coating the following layers on surface-treated polyethylene laminate paper from the support side.

Antihalation layer (first layer) Black colloidal silver is dispersed in an aqueous gelatin solution, with a dry film thickness of 2 at a ratio of 3 g/m2 of gelatin and 1.1 g/m2 of silver.
．． Apply to 0μ.

First intermediate layer (second layer) Dioctyl phthalate 2.5-dioctylhydroquinone ultraviolet absorber Tinuvin 328 (manufactured by Ciba Geigy)
, prepare a gelatin solution containing a protect-dispersed solution containing a surfactant (S-1), and apply Tinuvin in an amount of 0.15 g/
Apply so that it becomes "m".

Amount of red-sensitive emulsion (third layer) Sensitizing dye CD-3), [D-4],
Stabilizer (T-1), (T-2), surfactant C5-2)
Further, a protected dispersed coupler solution containing dibutyl phthalate, ethyl acetate, surfactant (S-2), 2,5-dioctylhydroquinone, and cyan couplers (CC-1) and (CC-2) was added.

Add gelatin and coat with emulsion.

2nd intermediate layer (4th layer) Same formulation as the 1st intermediate layer, coating amount of Tinuvin 0.15g/
Apply so that it becomes m2.

Green-sensitive emulsion layer (5th layer) Sensitizing dye (D-2), stabilizer (T-1), (
T-2), surfactant (S-2), dibutyl phthalate, ethyl acetate, 2,5-dioctylhydroquinone, surfactant (S-1), magenta coupler (MC-1)
) was added to the protect-dispersed coupler solution.

Add gelatin, further add hardener (H-1), and apply.

Third intermediate layer (sixth layer) The same formulation as the first intermediate layer, with a coating amount of Tinuvin 328 of 0.2
Coat so that it becomes ”g/m”.

Yellow filter layer (7th layer) Yellow colloidal silver made by oxidation in an alkaline weak reducing agent (the weak reducing agent was removed by the noodle water washing method after neutralization), dioctyl phthalate, ethyl acetate, surfactant (S- 1) Add 2,5-dioctylhydroquinone solution, surfactant (S-2) and hardener (H-1) and coat to give a colloidal silver coating amount of 0.15 g/m''.

4th middle layer (8th layer) Same as the first middle layer.

Blue-sensitive emulsion layer (9th layer) Sensitizing dye CD-1) and stabilizer (T-
1), (T-3), surfactant (S-2), further containing dibutyl phthalate, ethyl acetate, 2,5-dioctylhydroquinone, surfactant (S-1) and yellow coupler (YC-1) The coupler solution containing the protect dispersion was added.

Add gelatin, then add hardener (H-1) and coat.

5th intermediate layer (10th layer) Same formulation as the 1st intermediate layer, Tinuvin 328 coating amount 0.35
Coat so that it becomes "g/m".

Protective layer (first layer) Colloidal silica, coating aid (S-2), hardener (H-
2) (Coating using a gelatin solution containing H-33 so that the gelatin coating amount is 1.0 g/m''.

The first layer to the first layer) were coated by a simultaneous coating method and dried.

CD-1) (CII2)3 so,e (CHz)i SO,U CD-2) (D-33 so, 0 O3H [D 4] (T-1) [T~2] [T 3] [H 3] (YC ] [S 1] (S-2) C, H5 CI□-C00 CH2CH (CHz) + CH3 I C1+2 CI-(CH2) Knee CH.

03Na zHs [H ■] [H 2] (CH3) 2 Furthermore, an antihalation layer (first layer) and a first intermediate layer (second layer)
Sample 5.6 was prepared in the same manner except that the layer) was removed.

<Exposure method> Using a printer DSP-605F (manufactured by Dainippon Screen Co., Ltd.), the sample was exposed to a 0.075 step gray scale tablet and a 150! vjl/inch 1% to 5% net positive scale is closely attached to the Wratten filter 1) m-5
8 (green). Next, the original film was removed, exposed to light through a Lasoten filter 47B (blue), and similarly exposed to light passing through a 2.5 (red) filter. The exposure conditions at this time were set to the minimum exposure time such that the density of each coloring dye in the portion corresponding to the white background was minimized.

After exposure, the following photographic processing was performed. Furthermore, the effect of the present invention was confirmed by processing with a developer containing a pyrazolidone additive added to this color developer. The results are shown in Table 1.

Processing process (processing temperature and processing time) [1] Immersion (color developer) 38°C 8 seconds [2] Fog exposure 1 lux for 10 seconds 2 minutes 60 seconds 1 minute 30 seconds 1 minute [3] Color development [4] Bleach-fixing [5] Stabilization treatment [6] Drying treatment liquid composition (color developer) Benzyl alcohol Ethylene glycol Potassium sulfite Potassium bromide Sodium chloride Potassium carbonate Hydroxylamine sulfate Polyphosphoric acid (TPPS) 3-Methyl-4-amino- N-ethyl-N-(β-methanesulfonamidoethyl)-aniline sulfate fluorescent brightener (4,4'-diaminostyl 0 ml 5 ml 2.0 g 1.5 g 0.2 g 30,0 g 3. 0g 2.5g 38°C 35°C 5-30°C 5-80°C 5.5g Benzsulfonic acid derivative) 1.0g potassium hydroxide Add 2.0g water to bring the total amount to 1), and make p) 1) 0.20 adjust.

mryo P-1 P-2 P-3 P-4 P-5 e -7"/'Kitagami l 〕lLL" - Otsu L) 1-
Phenyl-3-pyrazolidone 60 1-p-hydroxyphenyl-414-dimethyl-3-pyrazolidone 80 1-phenyl-4,4-dimethyl-3- and lazolidone 90 ■-Phenyl-5 Methyl-3-pyrazolidone 75 1-phenyl -3 Pyrazolidone 160 (bleach-fix solution) Ethylenediaminetetraacetic acid ferric ammonium dihydrate 60g Ethylenediaminetetraacetic acid 3g Ammonium thiosulfate (70% solution) 100mA Ammonium sulfite (40%
Solution) 27.5mj! Adjust the pH to 7.1 with potassium carbonate or glacial acetic acid, and add water to bring the total volume to 1).

(Stabilizing liquid) 5-chloro-2-methyl-4-isothiazolin-3-one 1.0 g Ethylene glycol 10 g 1-hydroxyethylidene-1,1'-diphosphonic acid 2.5 g Bismuth chloride 0.2 g Magnesium chloride 0.1 g Ammonium hydroxide (28
% aqueous solution) 2.0g sodium nitrilotriacetate
Add 1.0 g of water to bring the total amount to 1), and adjust the pH to 7.0 with ammonium hydroxide or sulfuric acid.

Note that the stabilization treatment was performed using a countercurrent method with a two-tank configuration as described above.

(Example 2) By the method of preparing emulsion (D) of Example 1, the particle size distribution was 60.
Samples 7 to 9 were prepared by preparing a monodisperse emulsion in which % or more had an average particle size of 0.45 μm, adding a sensitizing dye, a coupler, etc., and coating it on polyethylene laminated paper surface-treated in the same manner as in Example 1. did. Further, a sample 10°1) was prepared in the same manner except that the antihalation layer (first layer) and first intermediate layer (second layer) were removed. Each of these samples was processed and evaluated in the same process as in Example 1. The evaluation results are shown in Table-2.

〔Effect of the invention〕

As described above, according to the present invention, a color proof with excellent sharpness and good dot reproducibility can be obtained.

Further, as shown in the examples, when a very small amount of pyrazolidone, which is a heterocyclic developing agent, is added to the developer and the average tone in the low concentration range is 1.7 or more, the effect of the present invention is remarkable. It will be done.

[Brief explanation of the drawing]

FIG. 1 shows a characteristic curve of a color photographic material.

Claims (1)

[Claims] (1) After exposing the transmission black-and-white halftone dot image obtained by separating the component colors from the color original and converting it into a halftone dot image in close contact with a chromogenic color photographic light-sensitive material whose density curve is a continuous tone, In the method of color development processing; The solid density D_m in each coloring layer of the color photographic light-sensitive material after the color development processing is 2.0 or less, and the average gradation on the low density side is 1.7 or more. A method for creating a color proof, which is characterized by: