JPH0437745A - Color image forming method - Google Patents

Abstract

PURPOSE:To obtain the color proof which is approximate to printed matter in terms of not only the bleeding at the fringes of dots but dot reproducibility as well by correcting exposing light by light quantity correcting means and optical path regulat ing means t the time of exposing a photosensitive material having the photographic gradations of leg parts of a specific value or above by using separation halftone originals. CONSTITUTION:The color photosensitive material to be used with the system for executing the exposing with the light formed by correcting the light from light source by the light quantity correcting means and the optical path regulating means is so adjusted that at least one of the photographic gradations of the leg parts of the yellow image, magenta image and cyan image of the photosensitive material are >=1.7 and the balances of the photographic gradations of the leg parts are respectively within + or -7%, by which the color images extremely approximate to the printed matter in gradation reproducibility, dot reproducibility and color balance are obtd. Acylacetoanilide couplers are usable as the yellow dye stuff forming couplers and 5-pyrazolone and pyrazoloazole couplers, etc., are usable as the magenta dye stuff forming couplers. Phenol or nephthol couplers are generally used as the cyan dye stuff forming coupler s.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a final image with improved sharpness and reproducibility in a silver halide color photographic light-sensitive material (hereinafter referred to as a color light-sensitive material).
The present invention relates to a method of forming an image on a transparent original, and particularly to a method of forming a color image suitable for creating a color print from a transparent original.

[Background of the invention]

Recently, the usage of color photosensitive materials has been diversified.

For example, there are ways to use it to create business cards and postcards by imprinting characters, or to create color posters and color blueprints from transparent originals.

In these applications, it is required that the final image obtained be highly sharp and free of blur in line drawings and characters.

In particular, when creating color blueprints, the goal is to check whether a printed material with the desired color tone and gradation can be obtained from the halftone film that serves as the original. required.

Color proofing is an alternative process in the printing industry to partially omit or reduce the trial printing process that is performed to check the finished quality of printed matter in advance during the process of producing printed matter from a color original manuscript. Various methods are known for color proofing. The methods include the silver halide photographic method, the 7-color printer transfer method, and the toner transfer method.
It is commercially available under trade names such as Chromalin (Dupont) and Cromarin (Dupont).

However, in the photopolymer transfer method, the transfer process is complicated and images cannot be obtained quickly, and the cost is also high. The toner transfer method causes toner to scatter, which is unfavorable in terms of environmental hygiene. Silver halide photography does not have these drawbacks and has the advantage of being low-cost, easy to work with, and can produce color proofs quickly; however, the final image obtained by the commonly used exposure method for color sensitive materials is not as sharp. The quality is insufficient, and faithful color balance cannot be obtained. Therefore, for color proofing, it has both halftone reproducibility and color balance reproducibility that are faithful to printed matter! =An image forming method is desired.

[Prior art]

In methods for producing color proofs using color sensitive materials, various techniques for obtaining target colors have been disclosed.

For example, JP-A-53-141034 describes a method for preparing a colored reference diagram and determining the exposure time. However, although this method can achieve the desired monochromatic density of yellow, magenta, and cyan, it cannot provide a color proof with a good color balance of blue-green and red that can be obtained with the additive method, and the exposure method is complicated. It became a thing.

JP-A-56-104335 discloses a method for producing a color proof in which the overall photographic gradation of a color sensitive material is 2.0 or more. However, there is no description regarding the leg photographic gradation, leg photographic gradation balance, and parallelism of exposure light for yellow images, magenta images, and cyan images. Specific examples of color sensitive materials include Fuji Color Paper 08, Fushichrome Paper Type 31, Kodachrome 74RC, etc., which are generally commercially available, but in all of them, the photographic gradation balance of the legs is different in order to print from color film to color paper. The resulting image is not suitable for color proofing because it has insufficient sharpness, poor reproducibility of highlights of fine text and patterns, and is difficult to clearly distinguish from a white background. It's a thing.

Additionally, there is a method for creating a color proof that uses a color sensitive material that has a total photographic gradation of 20 or more and includes other component colors during exposure, as described in JP-A-56-113139, but this method does not correct any color. Yes, there was no effect in terms of color balance.

In an image forming method in which an image is obtained by exposing and developing a color sensitive material, methods for improving the sharpness of the image include:
The following are known. (I) Bring the original and photosensitive material into close contact.

(II) An emulsion with a high-contrast characteristic curve is used in the light-sensitive material.

(I) Improving the sharpness of light-sensitive materials.

With the method (1), it is possible to obtain a sharp image to some extent with respect to any light source for an original image that is directly brought into close contact with the photosensitive surface of a photosensitive material.

However, in the printing process, a film original of one color is often composed of a plurality of overlapping sheets of film, and color proofs may also be used in this process. Furthermore, since images may be produced in the forward or reverse direction depending on the process, it may be necessary to expose the original film from the emulsion side and to expose the back side in close contact.

When the original image is separated from the photosensitive material in this way, it cannot come into close contact with the photosensitive material, so light is diffused in the film support that exists between the original image and the photosensitive material, resulting in thin lines and highlighted areas. reproducibility deteriorates significantly. Particularly when using ordinary color sensitive materials, even if you simply create and apply a silver salt emulsion with a high-contrast characteristic curve like (n), there will be fine lines and high contrast that are not suitable for color pull 7. Image reproducibility was only achieved in the light area.

The following method is known as a method for improving the sharpness of the color photosensitive material (I[I).

(1) Preventing irradiation using water-soluble dyes.

(2) An antihalation layer containing colloidal silver or colloidal manganese is provided.

(3) Increasing the packing density of the white pigment in the polyolefin layer of a reflective support in which a base paper is laminated with polyolefins.

(4) Thinning the photographic constituent layer containing hydrophilic colloid.

(5) A photographic constituent layer contains a compound that releases a development inhibiting compound during development.

Method (1) is also used in commercially available color photosensitive materials for printing, but since the purpose of general photosensitive materials is to reproduce halftones, the content of water-soluble dyes is low; The reflection density of each image forming layer at the maximum photosensitive wavelength of the color sensitive material before development is less than 0.5. For this reason,
A faithful color pull with sufficient sharpness = 7 cannot be obtained.

With method (2), staining occurs due to poor bleach-fixing of colloidal silver and deterioration of the white background due to capri of silver halide, and the photographic gradation is significantly softened, resulting in images with poor color balance as color proofs. can't get it. For this problem, Japanese Patent Application Laid-Open No. 63-63034
In JP-A No. 63-63040, it was proposed to specify the ratio of gelatin and colloidal silver in the anti-reaction layer and the adjacent auxiliary layer, and in JP-A No. 63-63040, it was proposed to specify the thickness of the anti-reaction layer, but no satisfactory effect could be obtained. .

Regarding (3), please refer to JP-A No. 61-284763 and JP-A-61-284763.
Although it is described in No. 1-270749 and No. 61-270750, an image that is satisfactory as a color proof cannot be obtained.

Regarding (4), there is a limit to how thin the photographic constituent layer can be made, and the effect is small.

Regarding (5), the edge effect is emphasized at low spatial frequencies, but an image that is satisfactory as a color proof cannot be obtained.

In addition, in either method, when a black-and-white halftone separation film was used as the original film, it was not possible to obtain the gradation reproducibility of halftone dots that approximated that of printed matter.

Furthermore, as a light source member for exposing light through such a transparent original, a slide projector is used to project a projected image onto the document table of the device in order to copy various projection originals such as slides, negative films, and microfilms. 2. Description of the Related Art Various types of document projection devices have been proposed, each of which includes a reflection member, an imaging member, and the like.

Various types of transparent original light source devices have also been proposed for copying transparent originals by placing various transparent originals directly on the document table of a copying device.

Such a transparent original light source device usually includes a light source for irradiating the transparent original, and a glue flap or the like for reflecting the irradiation light emitted from the light source onto the transparent original.

When copying a transparent original using such a transparent original light source device, the transparent original is placed on the document table of the copying device, and the transparent original is irradiated by the irradiated light from the light source or from the irradiated light from the light source and the reflector. The transparent original is irradiated with the reflected light. A photosensitive material or the like is then exposed to the transmitted light that has passed through the transparent original to obtain a copy image of the transparent original.

By the way, in such a transparent original light source device, the amount of light irradiated from the light source decreases from the center of the light source toward the periphery, and the amount of light is not uniform over the entire exposure surface of the copying device. The drawback is that differences in reproducibility occur due to differences in light intensity. In particular, when a fluorescent lamp is used as a light source, there is considerable unevenness in the light intensity distribution even within the same light source due to not only the difference in light intensity between the center and the periphery, but also due to uneven distribution and vibration of the fluorescent material.

On the other hand, as a means to regulate the optical path of the light that exposes the photosensitive material, a honeycomb board, a Fresnel lens, etc. is used between the light source and the document, as is used in various printers widely used in the printing industry. When exposing a photosensitive material with a small leg gradation, such as the general color photosensitive material mentioned above, the color balance suitable for color bluffing is known. Good halftone dot reproducibility could not be obtained.

[Purpose of the invention]

The purpose of the present invention is to produce faithful halftone dots with good sharpness as color proofs by using a color sensitive material that does not deteriorate the white background or photographic gradation and has significantly improved sharpness and halftone gradation reproducibility. An object of the present invention is to provide a color image forming method that combines point reproducibility and color balance. More specifically, the color has a faithful color balance by having less blurring in the halftone dot fringe (the outline of the halftone dot) and by uniformizing the halftone quality and halftone reproducibility of yellow, magenta and cyan images. An object of the present invention is to provide a color image forming method for obtaining a proof.

[Structure of the invention]

The inventors have found that there is a strong correlation between the blurring of the halftone dot fringe and the leg photographic gradation, and that when the leg photographic gradation is 1.7 or higher, the blurring of the halftone dot fringe becomes less. I found out. Furthermore, by correcting the exposure light using a light amount correction means and an optical path regulating means when exposing this sensitive material using a separation mesh original, it is possible to reproduce not only the blurring of halftone dot fringes but also the halftone dot reproducibility close to that of printed matter. I discovered that sex can be obtained.

A particularly preferable leg photographic gradation is 2.0 or higher. In order to stabilize the exposure latitude, the photographic gradation at a density of about 1.7 is preferably 1.8 to 2.5.

It has also been found that a color proof with good color balance can be obtained by equalizing the degree of bleeding in the halftone fringes in yellow, magenta, and cyan images, and by aligning the balance of halftone dot reproducibility. This means that the leg photo gradations of yellow, magenta, and cyan images become close to each other when exposed with light corrected by the light amount correction means and the optical path regulating means, and in particular, the leg photo gradation balance is ±. They have found that it is particularly effective when the content is within 7%, and have accomplished the present invention.

That is, the above object of the present invention is to provide photographic constituent layers including a silver halide emulsion layer for forming a yellow image, a silver halide emulsion layer for forming a magenta image, and a silver halide emulsion layer for forming a cyan image on a support. A color image forming method in which a color image is obtained by exposing and developing a silver halide color photographic light-sensitive material comprising: This is achieved by a color image forming method in which the balance of the leg photographic gradations is at least 1.7 or more and within ±7%.

The present invention will be explained in more detail below.

In the present invention, the leg photographic gradation is defined as a characteristic curve with fog +
The point that intersects with 0.25 (A in Figure 1) and fog +0.75
It is defined as the photographic gradation obtained when connecting the intersection point (B in Figure 1).

The photographic gradation of the legs depends on the chemical ripening conditions of the silver halide emulsion (for example, the amount of sodium thiosulfate, the ripening temperature, the ripening time, etc.), the distribution width of the halogen chemical particles (for example, monodisperse emulsion, polydisperse emulsion), and the additives (for example, Although it can be adjusted by adjusting the development conditions as well as stain inhibitors, couplers, etc., it is preferable to adjust the former during the production of the silver halide emulsion.

Further, the leg photographic gradation balance as used in the present invention is each γA: the leg photographic gradation of an arbitrary silver halide emulsion layer.

The leg photographic gradation balance is within ±7% by adjusting the leg photographic gradation of yellow images, magenta images, and noan images of color sensitive materials used in parallel light exposure systems using the method described above. can be suppressed to

In the present invention, the halftone reproducibility refers to the value converted from the density to the halftone percentage according to Murray-Dehis' formula, and the density is usually measured using a densitometer and a light source filter with a complementary color to the color of the object to be measured. It means the value obtained by converting the obtained concentration value using the following formula.

Dt: Density of the dotted area Ds: Density of the solid part (all values when the fog density is O) When the dot % calculated by this formula is plotted against the original dot % of the decomposed dot original, in the case of a printed matter , shows an arcuate reproduction curve that is thicker than the original dot percentage. This is generally called dot gain.19': The photographic tone of the other silver halide emulsion layers is
The size of the dot gain amount and the balance between the dot gain amounts of each color are extremely important for printed matter, and it is necessary to accurately trace the dot gain of the printed matter as a proof material that can be used as a substitute for printed matter.

The present invention relates to a system in which light from a light source is corrected by a light amount correcting means and an optical path regulating means, in which at least one of the leg photographic gradations of a yellow image, a macenter image, and a cyan image of a color sensitive material used is used. By adjusting the photosensitive material so that the gradation is 1.7 or more and the balance of the leg photo gradation is within ±7%, the gradation reproducibility, halftone reproducibility, and color balance of the printed matter are improved. It has become possible to obtain extremely similar color images.

Examples of the silver halide color photosensitive material used in the present invention include negative type color photosensitive materials, internal temperature type direct positive color photosensitive materials, and reversal type color photosensitive materials. There are two types of internal temperature type direct positive color photosensitive materials: a light-diffusion type and a chemical-diffusion type, and either one may be used.

In the silver halide emulsion used in the present invention, any silver halide can be used, such as silver bromide, silver iodobromide, silver iodochloride, silver chlorobromide, silver chloroiodobromide, and silver chloride. can.

The silver halide grains may be formed by any of the acid method, neutral method, and ammonia method, and methods known in the photographic field such as simultaneous mixing method, forward mixing method, back mixing method, and conversion method are used.

The silver halide grains may have a regular crystal shape such as a cube, octahedron, or dodecahedron, or may have an irregular crystal shape such as a spherical shape or a plate shape. Further, the particles may have a composite form of these crystal forms, or particles of various crystal forms may be mixed.

Silver halide emulsions can be used either with a wide grain size distribution (polydisperse emulsion) or with a narrow grain size distribution (monodisperse emulsion), but preferably a monodisperse emulsion (with a standard grain size distribution). deviation/average particle size - coefficient of variation 0.20 or less)
It is. The particle size is preferably 0.1 to 1.0 μm.

The silver halide emulsion can be chemically sensitized (e.g., sulfur sensitization, gold sensitization, selenium sensitization, reduction sensitization) and spectral sensitization (e.g., n-anine dye, melon-anine dye, hemicyanine dye, styryl dye, Spectral sensitization using hemioxonol dyes) is possible. Additionally, fog suppressants or stabilizers known in the art (eg, azaindenes, mercapto heterocycles) can be added.

The emulsion layer of the light-sensitive material contains a diffusion-resistant coupler that forms a dye by coupling with an oxidized product of an aromatic primary amine compound (e.g., p-)unilene diamine derivative or aminophenol derivative) during color development processing. is used.

As the yellow dye-forming coupler, acylacetanilide couplers can be used, and among these, benzoylacetanilide and piparoylacetanilide compounds are preferred. Specific examples of yellow couplers include, for example, U.S. Pat.
, No. 506, No. 3,408,194, No. 3゜551.
No. 155, No. 3.891,445, Japanese Unexamined Patent Publication No. 1973-73
Examples include couplers described in No. 147, No. 50-6341, No. 52-21827, No. 52-115219, and No. 58-95346.

As the magenta dye-forming coupler, 5-pyrazolone type, virazolore/-ol type, pyr/linobenimidazole type, indacilone type, open-chain acylacetonitrile type couplers, etc. can be used, and these are described, for example, in US Pat. No. 2.600. No. 788, No. 3.062653, No. 3.
No. 152.896, No. 3,558,318, No. 3.9
No. 30866, JP-A-49-29639, JP-A No. 50-1
No. 3041 etc. are described.

As cyan dye-forming couplers, phenolic or naphthol-based kaglars are commonly used. These 7
Uncouplers include, for example, U.S. Pat. No. 2.369.992, U.S. Pat.
3.034.892, 3.839.0.14,
JP-A No. 47-3742, JP-A No. 50-112038, JP-A No. 50-130441, etc. +: Described.

A benzophenone-based or benzotriazole-based ultraviolet absorber may be added to the photosensitive material.

Particularly preferred are benzotriazole compounds, including U.S. Patent No. 3,754,919, U.S. Pat.
Those described in No. 1572 and the like can be used.

The above-mentioned dye-forming couplers, ultraviolet absorbers, and other hydrophobic compounds are usually combined with high-boiling point organic solvents (e.g., phthalates, phosphate esters, phenol derivatives, alkylamides, cycloalkanes), and optionally with low-boiling points, and It is used by dissolving it in combination with/or a water-soluble organic solvent and emulsifying and dispersing it in a binder using a surfactant.

The binder used in the photographic constituent layer of the present invention includes:
Gelatin, albumin, agar, gum arabic, partially hydrolyzed polyvinyl acetate, polyacrylamide, etc. can be used, and gelatin is particularly preferred.

The emulsion layer and auxiliary layer on the emulsion side may contain various photographic additives. For example, color image stabilizers, color stain preventive agents, optical brighteners, antistatic agents, hardeners, etc. described in Research Disclosure Magazine No. 17643,
Surfactants, plasticizers, wetting agents, etc. can be used as appropriate.

As a coating method for the emulsion layer and the constituent layers, slide hopper coating, curtain coating, near doctor coating, etc. are useful, but simultaneous multilayer coating using a slide dropper is particularly preferred.

The reflective support of the present invention is made by laminating a thermoplastic resin such as a polyolefin (e.g. polyethylene, boriz σ pyrene) containing a white pigment on both sides of a base paper (rR
C base paper), baryta paper, plastic film containing white pigment, etc., especially those with a thickness of 100 to 15
RCJ of 0 μm [paper is preferred.

As the light source used in the exposure of the present invention, various kinds of light sources can be used, such as a rod-shaped light source in which a large number of short filaments are arranged in the longitudinal direction, a point light source in which a plurality of single filament point light sources are arranged. That is, there is no particular restriction as long as it has a light amount that can expose the photosensitive material etc. on the exposure surface, and various types of light such as natural light, tungsten electric lamps, fluorescent lamps, mercury lamps, halogen lamps, etc. can be used.

The light amount correcting means used in the present invention is intended to make the light amount of the light source uniform over the entire exposed surface.

Specifically, white acrylic board, glass glass, white glass,
Examples include various types of diffusion plates such as Day 7 Eugen/-T.

These various diffuser plates have transmittances of 55% or more and 95%
It is preferable that it is below. If the transmittance is higher than that, the light amount correction effect will be low, and even the obtained image will suffer from image deterioration due to light amount unevenness.

Those with a lower transmittance have a high light amount correction effect, but have the disadvantage that the amount of light effective for exposure decreases and the exposure time becomes longer. In particular, when silver halide photosensitive materials are exposed to light with a low intensity for a long time, a phenomenon called low illuminance failure occurs.
The resulting final image may be fogged or deteriorated due to softening of the tone.

In addition to the diffuser plate, various light amount correction filters, masks, etc. can also be used in combination. These can have an achromatic color density distribution depending on the light intensity distribution of the light source.

The optical path regulating means used in the present invention is a means for regulating the light from the light source into parallel light, and includes, for example, a method of measuring distance using a point light source, insertion of a honeycomb board, a self-hock lens, a 7-eye bar array, a Fresnel lens, etc. can be mentioned. Among them, honeycomb photo, cell-hook lenses, fiber arrays, etc. are effective because they are easy to use. Particularly in the case of honeycomb photo, care must be taken to use one with an appropriate aperture thickness since the parallelism of the exposure light obtained changes depending on the thickness and aperture of the honeycomb.

The term "parallel light" used in the present invention refers to light having a maximum incident angle of 70 degrees or more, more preferably 76 degrees or more.

Especially when stacking two sheets of original film or exposing from the back side of the emulsion, the parallelism of the light affects halftone dot reproducibility, especially reproducibility of small dots and large dots.
It is particularly preferable that it is above.

The light source member used in the present invention can incorporate other means depending on the purpose. For example, when obtaining a color proof from a transparent color separation halftone original, the original is a colorless film, so it is necessary to incorporate a color separation filter to obtain the exposure wavelength depending on the layer of color sensitive material that you want to develop. becomes. Further, in order to more effectively utilize the amount of light from the light source, the reflecting means may be placed behind the light source. The reflecting means is a member for reflecting the irradiated light emitted toward the back of the light source, that is, toward the side opposite to the transparent original, toward the transparent original to improve light collection efficiency.

The shape of the reflecting means is not particularly limited as long as it can appropriately reflect the irradiated light from the light source onto the transparent original. Therefore, its shape is appropriately determined depending on the size of the light source member to which it is applied, the shape and number of light sources, the amount of light, the distribution of light amount, etc., and the image forming apparatus to which it is applied.

Further, there is no particular restriction on the material, and any material used for normal glue flapers, such as aluminum or those materials subjected to surface treatment to increase light reflection, can be used.

The exposure method of the present invention may be either static exposure or scanning exposure.

In the present invention, the original and the photosensitive material do not necessarily need to be in close contact with each other, but if the transparent original or color photosensitive material has curls or curls caused by the nature of the original support, image reproducibility may be affected at the center and edges of the original. This makes it impossible to distinguish between images, especially in areas where the contact between the original and the color photosensitive material is poor. For this reason, it is preferable that the transparent original and the color photosensitive material are pressed and brought into close contact with each other using a contact aiding means such as a cover sheet or transparent glass. Particularly preferred is vacuum contact.

The color development process in the present invention is usually carried out in the order of a color development step, a bleach-fixing step, a water washing step, or a stabilization step known in the photographic industry.

In addition, for direct positive color photosensitive materials, in addition to the above, there are also reversal processing methods such as fogging processing, and for S/'-Sal color photosensitive materials, a positive image can be obtained by combining with the first black and white development processing. .

Aromatic primary amines are typical color developing agents for the color sensitive material of the present invention, and known alkaline agents, preservatives, antifoggants, optical brighteners, etc. are used in the color developing solution. be able to. Known bleaching agents and fixing agents can be used in the bleach-fixing solution.

Although the present invention is particularly effective for creating a color proof on a color photosensitive material through a transparent halftone original, it can also be used for copying transparent originals such as color negatives, slides, OHP, etc. onto color photosensitive materials. Of course you can.

〔Example〕

EXAMPLES The present invention will be explained in detail by examples below, but the present invention is not limited to the examples.

Example-1 As a support, on a paper support whose front surface was coated with polyethylene containing titanium oxide and whose back surface was coated with polyethylene,
An emulsion layer and a pack layer having the structures shown in Table 1 were coated to produce a negative color photosensitive material.

In the table, the amount added is shown in g/m2. However, the silver halide emulsion is a silver equivalent value.

Table-1 The following margin shows surfactant (S-1) as a coating aid on the emulsion layer side.
, (S-2) and (H-1) as a hardener.

(H-2) was used.

Each spectrally sensitized silver halide emulsion has a coefficient of variation of 0.1
By using the monodispersed emulsion No. 9 and varying the amount of sodium thiosulfate, temperature, and time during chemical ripening, samples with the photographic tones of the legs shown in Table 2 were obtained.

Margin below CH.

CH.

shstl (L) Al-2 D　OP dioctyl phthalate D　N　P Nidinonyl phthalate DIDP diisodecyl phthalate P V P: Polyvinylpyrrolidone I-1 ○H (CH2)zsOJ-N(,CzHshD~3 C2H.

CH2C00CH,C)lc,H.

CHCOOCH, CHC4H.

l SO3Na C2H5 SO, Na ShiU H-2C (CH2SO2CH=CH2).

The samples obtained as described above were subjected to the following treatments.

(Exposure method) A transparent black and white dot image with an area ratio of 150 lines/inch varied from 0% to 100% is used as the original.The original is vacuum-adhered to a photosensitive material, and the amount of light is adjusted between the light source and the original. As a correction means, a diffuser plate (Mitsubishi Rayon Acrylite ■No. 43
The exposure light was corrected by inserting a honeycomb board (2 transmittance: 76%) as an optical path regulating means, and color-separate exposure was performed.

A halogen lamp was used as the light source, and a Kodak Lanoten filter No. 47B (blue) was used as the color separation filter.
, No. 61 (green) and No. 29 (red) were used.

The exposure time was set so that the color image obtained after development had a yellow, magenta, and cyan halftone dot area of 100% and a solid area reflection density of 1.8 to 1.9, respectively.

The exposure was carried out under both conditions: when the emulsion side of the film original and the photosensitive layer side of the photosensitive material were brought into close contact, and when the back side of the original and the photosensitive layer side of the photosensitive material were brought into close contact.

(Development processing method) Color development 2 minutes 38°C bleach fixing Stabilization drying drying Color developer composition N-ethyl-N-β 3-Methyl-4-aminoaniline sulfate 33℃ 33℃ 1 minute 30 seconds 45 seconds Methanesulfonamide ethyl 70℃ 1 minute Hydroxylamine/sulfate potassium carbonate sodium chloride sodium bromide anhydrous sodium sulfite benzyl alcohol Add water to make 1g and add sodium hydroxide. p) (adjusted to -10,15.

Bleach-fix solution composition Ethylenediaminetetraacetic acid iron (I Add 20.0g water to make 1a, and use sulfuric acid to make pi-i -7,0
Adjust to.

Stabilizing liquid 5-chloro-2-methyl-4-inchazolin-3-one 1,0g Ethylene glycol 1.0g 1-hydroxyethylidene-1,1-diphosphonic acid 2.0g Ethylenediaminetetraacetic acid 1.0g Ammonium hydroxide ( 20% aqueous solution) 3.0g ammonium sulfite 3.0g optical brightener (4
, 4'-diaminostilbendisulfonic acid derivative)
Add 1.5g water to make 112,
Adjust pH to 7.0 with sulfuric acid or potassium hydroxide.

The following evaluations were performed on the treated samples.

(Evaluation Items) (1) Amount of dot gain: The density of each halftone image of a yellow image, a magenta image, and a cyan image was measured, and the amount of dot gain was determined using the following formula to evaluate halftone reproducibility.

D[=Density of mesh portion (value when fog density is O) Ds・
Density of solid area (value when fog density is 0) Dot gain amount - D (%) - Do (%) Do Original halftone dot area (2) Large dot area reproducibility 1 to 10% of original (large dot area) Visually evaluate the reproducibility.

The reproducibility of small dots and the reproducibility of 90 to 99% (small dots) of the manuscript were visually evaluated.

(3) Image quality evaluation Based on the results of (1) and (2), the image quality of the halftone image was evaluated as follows.

○...Color image with halftone image quality similar to printed matter △...Color image out of balance with respect to printed matter ×・
...Color images Δ and X, in which the large dots are crushed and the small dot reproduction is poor compared to the printed matter, are images that do not reach the target.

Table 3 shows the evaluation results for magenta images.

Below is a margin Example-2 Equimolar silver nitrate aqueous solution and potassium bromide aqueous solution were simultaneously added to a gelatin aqueous solution at 50°C for about 50 minutes using the double jet method to obtain cubic silver bromide particles with an average particle size of 0.3 μm. An emulsion consisting of To this emulsion, a silver nitrate aqueous solution and a sodium chloride/potassium bromide mixed aqueous solution (molar ratio 1:1) were added simultaneously to form a cubic core consisting of a silver bromide core and a silver chlorobromide shell with an average grain diameter of 45 μm. A shell emulsion (EM-1) was prepared.

RD-1, RD- suitable for each photosensitive layer of the above emulsion
After spectral sensitization by adding 1 tu of sensitizing dyes 2, CD-1, and BD-1, each layer of the formulation shown in Table 4 below was applied to the surface of a support whose both sides were laminated with polyethylene.
A silver halide color photographic material for use as a sample was constructed by coating the ninth layer and the back layer as shown in Table 4.

Margin below *Additional amount is based on silver equivalent.

Incidentally, a surfactant (s-1) is used as a coating aid on the emulsion layer side.
, (s-2) and (H-1) as a hardening agent.

(H-2) was used.

Each spectrally sensitized silver halide emulsion has a coefficient of variation of 0.1
By using the monodispersed emulsion No. 9 and varying the amount of sodium thiosulfate, temperature, and time during chemical ripening, samples with the photographic gradations of the legs shown in Table 5 were obtained.

D-J D-1 Below margin S C-1 O T T ■ v-2 (Exposure method) Implemented except that Mitsubishi Rayon Acrylite No. 422 (transmittance 86%) was used as a diffuser plate as a light amount correction means Separate color exposure was performed in the same manner as in Example-1.

However, the exposure time is for yellow, magenta, and
The time was set to provide the minimum exposure amount at which each density of the cyan non-image area was minimized.

(Development processing method) These exposed samples were processed through the following processing steps.

Processing process (processing temperature and processing time) (1) Immersion (color developer) at 38°C for 8 seconds (2) Fog exposure -1 lux for 10 seconds (3) Color development at 38°C for 2 minutes (4) Bleach-fixing
35℃ 60 seconds (5) Stabilization treatment 2
5-30℃ 1 minute 30 seconds (6) Drying
75-80℃ 1 minute Processing solution composition (color developer) Benzyl alcohol 15mQCe2
(SO*)s 0-01
5g Ethylene Glyfur 8+++1
Potassium bisulfite 2.5g Potassium bromide 0.8g Sodium chloride 0.2g Potassium carbonate
25.0gST-40,1
g Hydroquinylamine sulfate 5.0g Polyphosphoric acid (TPPS) 2g N-ethyl-N-β-hydroxy/ethyl-p-fuynylenediamine sulfate 5.0g Optical brightener (4
, 4'-diaminostilbendisulfonic acid derivative)
1.0g potassium hydroxide
2.0g diethylene glycol 1
Add 5 ml of water to bring the total volume to Iff, and adjust the pH to 10.20.

(Bleach-fix solution) Ferric ammonium ethylenediaminetetraacetic acid dihydrate 60g Ethylenediaminetetraacetic acid 3g Ammonium thiosulfate (70% solution) 100ml 12 Ammonium sulfite (40% solution) 27.5ml (pH 7.1 with 1 potassium carbonate or glacial acetic acid) Adjust and add water to make the total amount iff.

(Stabilizing liquid) 5-chloro-2-methyl-4-inthiazolin-3-one 1.0 g ethylene glycol logl-hydroquinethylidene-1,1-diphosphone il! 2,
5 g Bismuth chloride 0.2 g
Magnesium/U chloride O, 1g Ammonium hydroxide (28% aqueous solution) 2.0g Sodium nitrilotriacetate 1.0g Add water to bring the total volume to IQ, and adjust the pH with ammonium hydroxide or sulfuric acid.
Adjust to 7.0.

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

(Evaluation item) (1) Dot gain amount It was carried out in the same manner as in Example-1.

(2) Small point reproducibility The reproducibility of 1 to 5% (small dots) of the manuscript was visually evaluated.

(3) Image quality evaluation Based on the results of (1) and (2), evaluation was made in the same manner as in Example-1.

Table 6 shows the evaluation results for magenta images.

As is clear from the results shown in Margin Table 3 and Table 6 below,
When the light-sensitive material according to the present invention is used and the exposure according to the present invention is carried out, an image having extremely excellent halftone dot reproducibility can be obtained.

Example-3 Paper support laminated on both sides with polyethylene (thickness 10
5 microns) on the front side of the first layer shown in Table 7 below.
A color photographic material was prepared by applying a color photographic material in which the O layer and the 11th to 12th layers were coated on the back side. The first layer coating side of the polyethylene contains titanium white as a white pigment.

In the table, the coating amount is shown in units of g/m''. For silver halide, the coating amount is shown in terms of silver. The emulsion used in each layer was prepared according to the manufacturing method of emulsion EMI.

However, as the emulsion for the 11th layer, a Lippmann emulsion without surface chemical sensitization was used.

Below, preparation of margin emulsion EMI The aqueous seratin solution was vigorously stirred, and while keeping it at 75°C, an aqueous solution of potassium bromide and an aqueous solution of silver nitrate were simultaneously added over a period of 15 minutes to obtain an 8-sided aqueous solution with an average particle size of 0.21 micron. Silver bromide particles were obtained. This emulsion contains 0 per mole of silver.
．． 1 g of 3.4-+dimethylcy 1,3-thiazoline-
Chemical sensitization was performed by sequentially adding 2-thione, 4 Ing of sodium thiosulfate, and 7 mg of chloroauric acid (tetrahydrate) and heating at 75° C. for 25 minutes. The obtained particles were used as cores and further grown under the same particle growth conditions as the first time.
Finally, a core/shell silver bromide emulsion with an octahedral monodisperse having an average grain size of 0.45 microns was obtained.

The variation in grain size was 10%.This emulsion was chemically amplified by adding 1.5 mg of sodium thiosulfate and 1.5 mg of chloroauric acid (tetrahydrate) per mole of silver and heating at 60°C for 45 minutes. Sensitivity treatment was performed to obtain an internal latent image type silver halide emulsion.

FA-1 and FA2 were each used as fogging agents in each photosensitive layer at 2.0% per mole of silver halide. OX 10-''mol, maj: 4.5X each of fog inhibitors 5T-5 and 5T-6
10-'mol was added.

Each spectrally sensitized silver halide emulsion has a coefficient of variation of 0.0
8-0. By using a monodisperse emulsion of 1O and varying the amount of sodium thiosulfate, temperature, and time during chemical ripening, samples with the photographic gradation of the legs shown in Table 8 were obtained.

Below margin D D-4 V ■ A ○ -2 D V V s s ■ ■ I-4 MC ■ V V-5 MC Co-2 O O A 1.2-His(vinylsulfonylacetamide) ethane and 2, 5.6-Trichloro-1,3,5-triazine mixture with a molar ratio of 1.1.

A CH, CaCH A-2 (Exposure method) Color separation exposure was performed in the same manner as in Example-1.

However, the exposure time is yellow magenta after processing,
The time was set to provide the minimum exposure amount to minimize the respective densities of the non-image areas of /An.

(Development processing method) These exposed samples were processed in the following processing steps.

Processing process (processing temperature and processing time) Color development 38℃ 130 seconds bleach fixing
35°0 40 seconds washing (1)
Wash at 33°C for 40 seconds (2) Wash at 33°C for 40 seconds (3) Dry at 33°0 for 15 seconds
Processed at 80°C for 30 seconds Solution composition Color developer Ethylene diamine tetrachloride 0.5 g Diethylene glycol smethylenephosphonate JO + nl Benzyl alcohol 12.0 ml Potassium bromide 0.65 g Sodium sulfite 2.4 g N, N-diethylhydroxylamine 4.0 g Tri Ethylenediamine (
l,4-diazabicycloC2,2,2)octane)
4.0 g N-ethyl-N-(β-methanesulfonamidoethyl)-3-methylaniline sulfate 5.6 g Potassium carbonate 27
．． 0g optical brightener (diaminostilbene type) 1.0g Add water to 000ml p)! (25℃) 10.50 Bleach-fix solution ethylenediaminetetraacetic acid, disodium, dihydrate
4.0g ethylenediaminetetraacetic acid, Fe (m ), ammonium, dihydrate
46.0g ammonium thiosulfate 155
m1 (700g/I) Sodium p-toluenesulfinate 20.0g Sodium bisulfite 12.0g Ammonium bromide 50.0g Ammonium nitrate 30.0g Add water
1000mlp100℃)
6.20 Stabilizing liquid tap water and H-type strongly acidic cation exchange resin (Amberlite IR-120B manufactured by Rohm and Haas), 0) 1
Type anion exchange resin (Kuba Amberlite IR-400)
Water was passed through a mixed-bed column packed with water to reduce the concentration of calcium and magnesium ions to 3 mg/l or less, and then 20 mg/l of sodium incyanurate dichloride and 1.5 g/l of sodium sulfate were added. The pH of this solution is 6
．． It was in the range of 5 to 7.5.

The stabilization treatment was carried out using a countercurrent method with a two-tank configuration.

(Evaluation item) (1) Dot gain amount It was carried out in the same manner as in Example-1.

(2) Small point reproducibility The reproducibility of 1 to 5% (small dots) of the manuscript was visually evaluated.

(3) Image quality evaluation Based on the results of (1) and (2), evaluation was made in the same manner as in Example-1.

Table 9 shows the evaluation results for magenta images.

Margin Example-4 Below, for the photosensitive material used in Example-3, a fluorescent lamp was used as a light source, and Mitsubishi Rayon Acrylide'N was used as a light amount correction means.
The same procedure as in Example 3 was carried out except that a cell-hoc lens was used as the optical path regulating means and scanning exposure was performed through a slit.

Note that the color separation filter was used by being sandwiched between diffuser plates.

The results are shown in Table 1O.

The following is a margin example-5 (Exposure method) White fluorescent lamp (40W') as a light source for sensitive material 2.5.7 As a light amount correction means ■ Rayon acrylic plate with a transmittance of 50% ■ Rayon acrylic with a transmittance of 76% Board■Rayon acrylic plate with 98% transmittance As a light path regulating means/・Using a Nicum board, the corrected light was scanned and exposed through a slit, and the area ratio was changed at 150 lines/inch as the original, and the blank area was solid. The emulsion side of the original was vacuum-adhered to a light-sensitive material using a transmission type black-and-white dot film having a transmissive black-and-white dot film.

Kodak Wratten Filter N as a color separation filter
o, 47B (blue), No, 61 (green), No
, 29 (red), was used.

The exposure time is such that for photosensitive material-2, the color image obtained after development is yellow, magenta and cyan halftone dot area is 100.
Conditions were set so that the solid reflection density of % was 1.8 to 1.9, respectively, and for photosensitive materials -4 and 6, the respective densities of yellow, magenta, and cyan non-image areas after development were , t is the time to provide the minimum amount of exposure, respectively.

(Development processing method) Development processing was performed using a method suitable for each photosensitive material.

(Evaluation Items) The following items were evaluated near the center and near the edges of the light source in the final image obtained from each photosensitive material.

(1) White background density Measure at 5 points with white light and find the average value.

(2) Solid density The reflection density of the solid part of maze/red was measured at 5 points with green light and the average value was determined.

(3) Image Evaluation The color image quality of the halftone dot image was evaluated in the same manner as in Example-1.

The results are shown in Table-11.

Margin below. Similarly, B is the point where D takes the value of F+0.75, and b
represents the corresponding log E value.

Claims (1)

[Claims] A silver halide color photographic light-sensitive material having photographic constituent layers on a support including at least a silver halide emulsion layer forming a yellow image, a silver halide emulsion layer forming a magenta image, and a silver halide emulsion layer forming a cyan image. In a color image forming method for obtaining a color image by exposing and developing a material, the exposure is performed with corrected light from a light source through a light source member including a light amount correcting means and an optical path regulating means, and the yellow image, A method for forming a color image, characterized in that at least one of the leg photo gradations of a magenta image and a cyan image is 1.7 or more, and the balance of the leg photo gradations is within ±7%.