JPH02110551A - Silver halide color photographic sensitive material - Google Patents

Abstract

PURPOSE:To improve sharpness, processing stability and production efficiency by incorporating a DIR compd. into at least one layer of single layer and setting the exposing latitude of the single layer >=3.0. CONSTITUTION:The DIR compd. is incorporated into at least one layer of the single layer of the silver halide color photographic sensitive material which has blue-, green- and red-photosensitive silver halide emulsion layers on a base and of which at least one color sensitive silver halide emulsion layer is constituted of the single layer; in addition, the exposing latitude of the single layer is set >=3.0. The DIR compd. refers to the compd. which eliminates a development restrainer or compd. which separates compd. capable of releasing the development restrainer by reaction with the oxidant of a color developing agent. The sharpness, stability in processing fluctuations and production efficiency are improved in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a silver halide photographic light-sensitive material, and particularly to a silver halide color photographic light-sensitive material in which at least one color-sensitive layer is formed into a single layer.

[Background of the invention]

Negative color photographic materials for photography are required to have improved performance in various respects, and in particular, with the recent trend toward smaller formats, there is a demand for highly improved image quality in terms of graininess, sharpness, and the like.

Also, color photographs are currently taken using color negative film.
The so-called negative-positive method, in which color prints are made by enlarging photographic materials for color prints, is widely used. One of the reasons for this is that color negative film has a very large exposure latitude, the probability of failure during shooting is very low, and even users without specialized knowledge can easily take color photos. This is a major feature of the negative-positive method, unlike versatile films, etc., and in color negative films, it is important to have a wide latitude as well as the above-mentioned improvements in graininess and sharpness.

In order to obtain wide latitude and good graininess in color negative film for photography currently on the market, the British Patent No. 9
23.045 and Japanese Patent Publication No. 49-15495, a multilayer structure consisting of two or more emulsion layers having the same color sensitivity but with different grain sizes of silver halide grains, that is, different sensitivities, is used. It has been adopted.

However, although this silver halide photographic material having a multilayer structure has the above-mentioned advantages, it has various problems.

First, since the same color-sensitive layer has two or more emulsion layers, the film thickness increases and sharpness deteriorates.

Second, due to the use of silver halide grains with different grain sizes in the high-speed and low-speed layers and the multilayer structure, the development speed of layers coated close to the support becomes slower, resulting in processing fluctuations. stability is poor.

The background to this is that color negative film is developed in a variety of laboratories compared to universal, so it is more likely to be developed under fluctuating processing conditions, so color negative film has a high degree of stability against fluctuations in processing conditions. Sometimes it is requested.

Thirdly, since the silver halide photographic light-sensitive material having a multilayer structure has a large number of layers in total, it is coated in several steps, resulting in poor production efficiency.

Fourth, although the shelf life of color negative films has been improved in recent years, it is still not fully satisfactory, and further improvements are desired.

Fifth, the effect on the inhibitor that diffuses from other layers during color development is different between the high-speed layer containing large silver halide grains and the low-speed layer containing small silver halide grains. It is difficult to create gradations with good tone reproducibility for colors.

[Purpose of the invention]

The present invention was made in view of the above problems, and the purpose of the present invention is to provide a halogenated material that has good graininess and sharpness, has a wide exposure latitude, has excellent processing stability, and has a simple production process and high production efficiency. An object of the present invention is to provide a silver color photographic material.

[Structure of the invention]

The above object of the present invention is to have blue-sensitive, green-sensitive and red-sensitive color-sensitive silver halide emulsion layers on a support, and at least one color-sensitive silver halide emulsion layer is a single layer. In a silver halide color photographic light-sensitive material composed of
This was achieved by a silver halide color photographic light-sensitive material characterized in that each of the single layers contains a diffusive DIR compound, and the single layer has an exposure latitude of 3.0 or more.

[Specific structure of the invention]

In the present invention, the silver halide emulsion layer being a single layer means that the type of coupler contained in the emulsion layer, the grain size of the silver halide grains, the halogen composition and crystal habit, and the ratio of coupler and silver halide are the same. It also includes cases where a plurality of emulsion layers are arranged as a continuous layer.

In the present invention, it is preferable that at least the blue-sensitive silver halide emulsion layer is a single layer, and it is more preferable that both the blue-sensitive and green-sensitive silver halide emulsion layers are a single layer, particularly the blue-sensitive silver halide emulsion layer. It is preferred that all of the green-sensitive, green-sensitive and red-sensitive silver halide emulsion layers each be a single layer.

When the color-sensitive layer has a single-layer structure, the number of coated layers of photosensitive material is reduced compared to the conventional multi-layer structure, making it possible to form a thin film. Therefore, production efficiency, sharpness, and graininess are improved. The film thickness is 2 as the film thickness after drying.
The thickness is preferably 0 to 3 μm, particularly preferably 15 to 5 μm.

In the present invention, the DIR compound refers to a compound that releases a development inhibitor or a compound capable of releasing a development inhibitor upon reaction with an oxidized product of a color developing agent.

Among DIR compounds, diffusible DIR compounds are preferred.

In the present invention, a diffusible DIR compound refers to a development inhibitor or a compound capable of releasing a development inhibitor that is released by reaction with an oxidized form of a color developing agent, and has a diffusivity of 0.34 or more according to the evaluation method described below. and preferably 0.40 or more.

Diffusibility is evaluated by the following method.

A photosensitive material sample (1) with layers of the following composition on a transparent support
) and (II) are prepared.

Sample (■): A sample having a green-sensitive silver halide emulsion layer Spectrally sensitized to green-sensitivity silver iodobromide (silver iodide 6 mol %, average grain B 0.48 μl 11) and the following coupler per mol of silver. A gelatin coating solution containing 0.07 mol of gelatin was coated so that the amount of coated silver was 1.1 g/m'' and the amount of gelatin applied was 3.0 g/m'', and then chemical sensitization and spectroscopy were applied as a protective layer. A gelatin coating solution containing unsensitized silver iodobromide (silver iodide 2 mol%, average grain size 0.08 μm) was coated with a coating amount of 0.1 g/m'' and a gelatin coating amount of 0.8 g. / n
Apply so that it becomes “+”.

Q Sample (■): Sample (I) above with silver iodobromide removed from the protective layer.

In addition to the above, each layer contains a gelatin hardening agent and a surfactant.

After exposing samples (I) and (II) to white light using a wedge,
Process according to the processing method below.

The sensitivity of sample (II) was 60% (logarithmically expressed,
.about.Δlog E = 0.22) and those to which no development inhibitor was added were used.

Processing process (38℃) Color development 2 minutes 40 seconds Bleaching 6 minutes 30 seconds Water
Washing 3 minutes 15 seconds Fixation 6 minutes 3
0 second water wash
Stabilization for 3 minutes and 15 seconds Drying for 1 minute and 30 seconds The composition of the treatment liquid used in each treatment step is as follows.

[Color developer] 4-amino-3-methyl-N-ethyl-N-(β-hydroxyethyl)aniline sulfate 4.75g anhydrous sodium sulfite 4.25g hydroxylamine 1/2 sulfate 2.0g anhydrous Potassium carbonate 37.5 g Sodium bromide 1.3 g Nitrilotriacetic acid trisodium salt (l hydrate) 2.5
g Potassium hydroxide 1.0 g
Add water to obtain IQ.

[Bleach solution] Ethylenediaminetetraacetic acid iron ammonium salt 100.0 g
Ethylenediaminetetraacetic acid diammonium salt 10.0 g Ammonium bromide 150.0 g Glacial acetic acid 10.0 mQ Add water to make 1Q, and use aqueous ammonia to pH = 6.0
Adjust to.

[Fixer 1 Ammonium thiosulfate 175.0 g
Anhydrous sodium sulfite 8.58 Sodium metasulfite 2.3 g Add water to make 112, and adjust to pH = 6.0 using 1 acid.

[Stabilizer 1 Formalin (37% aqueous solution) 1.5+
nQ Konidax (manufactured by Konica) 7.5
Add m12 water to make lQ.

The sensitivity of sample (1) when no development inhibitor is added is 50, the sensitivity of sample (II) is SO'&L, the sensitivity of sample (1) when a development inhibitor is added is 51, and the sensitivity of sample (1) is 50. If the sensitivity of II) is S, then the desensitization of sample (1) is Δs −s o−s .

Desensitization of sample (II) to S o -S o '-S
It is expressed as II diffusivity=ΔS/ΔS.

However, all sensitivities are the logarithm (-1ogE) of the reciprocal of the exposure amount at the density point of fog density +0.3.

Diffusion table of several types of development inhibitors determined by this method (Continued) In the present invention, it is preferable that the diffusible DIR compound has a released group within the above-mentioned range, but any other compounds may also be used. be able to.

Representative structural formulas are shown below.

General formula (D-1) A-(Y)m A represents a coupler residue, m represents 1 or 2, and Y is bonded to the coupling position of the coupler residue A to form an oxidized product of the color developing agent. A group that leaves by reaction and represents a development inhibitor group or a group capable of releasing a development inhibitor.

In general formula (D-1), Y is typically represented by the following layer structure (
D-2) to (D-19).

-Layering (D-2) General formula (D-3) General formula (D-5) Layering general formula (D General formula (D-8) Above (D-9) Rd general formula (D- In 2) to (D-7), Rd is a hydrogen atom, a halogen atom, or alkyl, alkoxy, acylamino, alkoxycarbonyl, thiazolidinylideneamino, aryloki/carlevonyl, acylamino, carbamoyl, N-alkylcarbamoyl , amino, N-arylcarbamoyloxy, sulfamoyl, N-alkylcarbamoyloxy, hydroxy, alkoxycarbonylamino, alkylthio, arylthio, aryl, heterocycle, n-ano, alkylsulfonyl, or aryloxycarbonylamino. n is 0. , l or 2, and when n is 2, each R
dl may be the same or different. The total number of carbon atoms contained in n Rd is 0 to 10. Also - Stratification (D-
The number of carbon atoms contained in Rd in 6) is 0 to 15.

X in the above layered structure (D-6) represents an oxygen atom or a sulfur atom.

In general formula (D-8), Rd represents an alkyl group, an aryl group, or a heterocyclic group.

- In stratification (D -9), Rd3 represents a hydrogen atom or six groups of alkyl, cycloalkyl, aryl, or heterocycle, and Rd is a hydrogen atom, a halogen atom, or alkyl, cycloalkyl, aryl, acylamino, alkoxycarbonyl Amino, aryloxycarbonylamino, alkanesulfonamide, cyano, heterocycle,
Represents 6 alkylthio or amino groups.

Rd,,Rd! , Rd3 or Rd represents an alkyl group, this alkyl group may have a substituent and may be either a straight chain or a branched chain.

When Rd, Rd2, Rd, or Rd4 represents an aryl group, the aryl group includes those having a substituent.

When Rd, , Rd, , Rd3 or Rd represents a heterocyclic group, this heterocyclic group includes those having a substituent, and the heteroatom is at least one selected from nitrogen atom, oxygen atom, and sulfur atom. A 5- to 6-membered monocyclic or condensed ring containing 5- to 6-membered rings is preferred, for example, selected from the following six groups: pyridyl, quinolyl, furyl, benzothiazolyl, oxasilyl, imidazolyl, thiazolyl, triazolyl, benzotriazolyl, imide, and oxazine.

- The number of carbon atoms contained in Rd in the stratification (D-6) and (D-8) is 0 to 15.

In the above layer formation (D-9), the total number of carbons contained in Rd and Rd is θ˜15.

-Layering (D-10) -TIME-INHIBIT In the formula, the TIME group is a group that is bonded to the cuff-pulling position of A and can be cleaved by reaction with an oxidized product of a color developing agent,
It is a group that can release an INHIBIT group in a moderately controlled manner after being cleaved from a coupler. The INHIBIT group is a group that becomes a development inhibitor upon the above-mentioned release (for example, the above-mentioned layer formation (D-2
) to (D-9).

In general formula (D-10) -TIME-INHIB
The IT group typically has the following layer structure (D-11) to (D
−19).

General formula (D-11) General formula (D-14) - Layer formation (D-15) - Layer formation (
D-16) General formula (D-17) General formula (D-18) General formula (D-12) - Layering (D-13) - Layering (
D-19) Rd, Rd.

- Stratification (D -11) to (D -15) and (D -1
In 8), Rd is a hydrogen atom, a halogen atom, or alkyl, cycloalkyl, alkenyl, aralkyl, alkoxy, alkoxycarbonyl, anilino, acylamino, ureido, cyano, nitro, sulfonamide, sulfamoyl, carbamoyl, aryl, carboxy,
Represents 6 groups of sulfo, hydroxy or alkanesulfonyl, -stratified (D-11) to (D-13), (D
-15), (D-18), Rd may be bonded to each other to form a condensed ring, layered (D-11),
In (D-14), (D-15) and (D-19), Rds is alkyl, alkenyl, aralkyl,
Represents 6 groups of cycloalkyl, heterocycle or aryl,
- In stratification (D-16) and (D-17),
Rdt represents a hydrogen atom or six groups of alkyl, alkenyl, aralkyl, cycloalkyl, heterocycle, or aryl, and Rd in -stratification (D-19) and Rd
, respectively represent a hydrogen atom or an alkyl group (preferably an alkyl group having 1 to 4 carbon atoms), -layer structure (D-11)
, k in (D -15) to (D -18) is 0.1
or represents an integer of 2, -stratification (D-11) to (D-1
3), (D-15), (D-18), Q in 8 is 1 to 4
m in stratification (D-16) represents an integer of l or 2, and when m is 2, each Rd may be the same or different, and n in stratification (D-19) is 2-4
n Rda and Rds may be the same or different, and - stratification (D-16) to (D -
B in 18) is an oxygen atom or N-(Rd) has the same meaning as defined above.

vinegar. ), and = in -stratification (D-16) indicates that it may be a single bond or a double bond,
For single bonds, m is 2; for double bonds, m1i
l, and the INHIBIT group has the general formula (D2) to (D-
It has the same meaning as the general formula defined in 9) except for the number of carbon atoms.

In the NHIBIT group, -stratification (D-2) to (D7
), the total number of carbon atoms contained in R1 in the molecule is θ ~ 32, the number of carbon atoms contained in Rd2 in - stratification (D-8) is 1 to 32, and - stratification (D9) The total number of carbons contained in Rd3 and Rd in 8 is 0 to 32
It is. When Rd, Rda and Rdy represent an alkyl group, an aryl group or a cycloalkyl group, those having substituents are included.

Among the diffusible DIR compounds, preferred are those in which Y is represented by the general formula (D-2), (D-3) or (D-10), and in (D-10), ! NHIBIT
is the general formula (D-2), (D-6) (especially - stratification (D
-6) when X is an oxygen atom) or (D -88 especially - when Rd2 of -stratification (D-8) is hydroquinaryl or alkyl having 1 to 3 carbon atoms) preferable.

Examples of the coupler component represented by A in general formula (D-1) include yellow image-forming coupler residues, magenta image-forming coupler residues, cyan image-forming coupler residues, and colorless coupler residues. .

Preferred diffusible DIR compounds used in the present invention include the following compounds, but are not limited to these exemplified compounds.

■ t NO2 CH.

CH3 cstb(i) ■ C.I.

Including these, old R that can be used in the present invention
Specific examples of compounds are U.S. Pat. Nos. 4,234.678 and 3.
, 227.554, 3,617.291, 3,
No. 958.993, No. 4.149.886, No. 3,9
No. 33.500, JP-A No. 57-56837, 51-1
3239, U.S. Pat. No. 2,072,363, U.S. Pat.
70゜266, Research Disclosure, 198
December 1st.

21.228, etc.

The old R compound is 0.0001 to 1 mole of silver halide.
It is preferable to use 0.1 mol, especially 0.001 to
Preferably, 0.05 mol is used.

As a means for widening the exposure latitude of a single silver halide emulsion layer to 3.0 or more, a method of mixing and using silver halide grains having different sensitivities can be used. Specifically, examples include a method in which silver halide grains having different grain sizes are mixed and used, a method in which a desensitizer is contained in at least a portion of the silver halide grains, and the like.

The exposure latitude that is a problem in the present invention is the width of the amount of received light that produces a significantly different exposure effect, and that is, from the highlight to the deep shadow in the characteristic curve, as shown in FIG. The slope of the tangent at the foot and shoulder of the characteristic curve expressed in terms of transmission density is 0.22
It is the difference in Qog H of the points. Here, H is the exposure amount, which is the product of the intensity (illuminance) of light irradiated onto the surface of the photosensitive material and the working time.

The negative silver halide color photographic light-sensitive material of the present invention has an exposure latitude of 3.0 or more, preferably 8.0 or less, as measured by the above method.

Silver halide grains with different grain sizes used in combination to obtain a wide exposure latitude have an average grain size of 0.2.
A combination of halogen particles having a maximum average particle size of ~2.0 μm and silver halide grains having a minimum average particle size of 0.05 to 1.0 μm is preferable, and a combination of halogen particles having a medium average particle size is preferable. One or more types of silver oxide particles may be combined.

Further, the average grain size of the silver halide grains having the maximum average grain size is 1.5 to 4% of the average grain size of the silver halide grains having the minimum average grain size.
Preferably, it is 0 times.

In order to obtain a wide exposure latitude, it is possible to mix and use silver halide grains with different average grain sizes. If used, the difference in average grain size can be reduced without changing the sensitivity of silver halide grains, and furthermore, it is possible to mix and use silver halide grains having the same average grain size and different sensitivities.

That is, by using silver halide grains containing a desensitizer, a wide exposure latitude can be obtained even if the coefficient of variation of the entire grain is made small.

Therefore, these silver halide grains having a small coefficient of variation that are exposed to the same environment are preferred because their photographic performance is stabilized against changes over time and fluctuations in development processing. Furthermore, from the viewpoint of production technology, it becomes possible to chemically sensitize a mixed system of silver halide grains having different sensitivities in the same batch.

Various desensitizers can be used, such as metal ions, anti-capri agents, stabilizers, and desensitizing dyes. Among these, metal ion doping is preferred.

The metal ion used for doping is Cu.

Cd, Zn, Pb, Fe, TQ, Rh, B
Examples include metal ions such as i, Ir, ^u, Os, and Pd, preferably Rh, Cu, and Os;
Rh is particularly preferred. These metal ions can be used, for example, as halogeno complex salts, or two or more types can be used in combination. pH of AgX suspension system during doping
is preferably 5 or less.

In addition, the doping amount of these metal ions varies depending on the type of metal ion, the grain size of the silver halide grain, the doping position of the metal ion, the desired sensitivity, etc.
10-17-10-'-E-ol is preferred, and 10-'' to 10-'-mol is particularly preferred.

Further, by selecting the type of metal ion, doping position and doping amount, it is possible to impart various different sensitivity qualities to the silver degenide grains.

If the doping amount is less than 10-2 mol/AgX mol, it will not have a large effect on grain growth, so 7% silver halide grains with a small grain size distribution will be used under the same grain growth conditions, and even under the same batch growth. It can be prepared.

It is also possible to prepare silver halide grains with different doping conditions to conditions suitable for practical use, mix them in a predetermined quantitative ratio to form the same batch, and apply chemical sensitization. Each silver halide grain receives a sensitizing effect based on its properties, and an emulsion having a wide latitude can be obtained depending on the sensitivity difference and mixture ratio.

As the anti-capri acid stabilizer, azoles (
For example, benzthiazolium salts, indazoles, triazoles, benztriazoles, benzimidazoles, etc.).

Heterocyclic mercapto compounds (e.g. mercaptotetrazoles, mercaptothiazoles, mercaptothiadiazoles, mercaptobenzthiazoles, mercaptobenzimidazoles, mercaptopyrimidines, etc.)
.

Azaindenes (e.g. tetraazaindenes, pentaazaindenes, etc.).

Examples include nucleic acid decomposition products (eg, adenine, guanine, etc.), benzenethiosulfonic acids, thioketo compounds, and the like.

Examples of desensitizing dyes include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holoporacyanine dyes, hemicyanine dyes, styryl dyes, and hemioxonol dyes.

The location of the desensitizer is preferably mixed inside the silver halide grains from the viewpoint of storage stability of the photosensitive material, stagnation stability of the coating solution, etc., and even if its distribution is uniform, , even if it is localized at the center or intermediate position of the particle,
It may also gradually decrease from the center of the particle toward the outside.

From the viewpoint of production efficiency, it is preferable that the seed particles be localized in the center of the particles, and a method using seed particles with a small coefficient of variation can be promoted.

The silver halide emulsion used in the light-sensitive material of the present invention includes:
Any of the conventional silver halide emulsions can be used.

The emulsion can be chemically sensitized by conventional methods, and can be optically sensitized to a desired wavelength range using a sensitizing dye.

Anticapri agents, stabilizers, etc. can be added to the silver halide emulsion. Gelatin is advantageously used as binder for the emulsion.

The emulsion layer and other hydrophilic colloid layers can be hardened and can contain a plasticizer and a dispersion (latex) of a water-insoluble or sparingly soluble synthetic polymer.

A coupler is used in the emulsion layer of a light-sensitive material for color photography.

Furthermore, by coupling with a colored coupler having a color correction effect, a competing coupler, and an oxidized form of a developing agent, it is possible to improve the ability of developers, silver halide solvents, toning agents, hardeners, antifoggants, and chemical sensitization. Compounds that release photographically useful 7-ragments such as agents, spectral sensitizers, and desensitizers can be used.

The photosensitive material can be provided with auxiliary layers such as a filter layer, an antihalation layer, and an antiirradiation layer. These layers and/or the emulsion layer may contain dyes that are washed out or bleached from the light-sensitive material during the development process.

For photosensitive materials, formalin scavenger-fluorescent brightener,
A matting agent, a lubricant, an image stabilizer, a surfactant, a color antifoggant, a development accelerator, a development retarder, and a bleach accelerator can be added.

As a support, paper laminated with polyethylene, etc.
Polyethylene terephthalate film, baryta paper, cellulose triacetate, etc. can be used.

The photosensitive material of the present invention is particularly useful as a negative photosensitive material.

To obtain a dye image using the photosensitive material of the present invention, after exposure,
Commonly known color photographic processing can be performed.

[Specific embodiments of the invention]

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the embodiments of the present invention are not limited thereto.

Example-1 Multilayer color photosensitive material No. 1 having the composition shown below was prepared on a subbed cellulose acetate support.

1 was created.

Coating amounts are expressed in g/m'' per silver for silver halides and colloidal silver, in g/m' for additives and gelatin, and for sensitizing dyes and couplers. The number of moles is expressed per mole of silver halide in the same layer.

The emulsions contained in each color-sensitive emulsion layer were optimally sensitized using gold and sulfur sensitizers.

In addition to the above components, a surfactant was added to each layer as a coating aid.

C-1 C,H.

Sensitizing dye I Sensitizing dye■ sensitizing dye m Sensitizing dye■ (CH2)sSOx’ (CHJiSOJ-N(C2H6)3 C H C4Hs(t) 2H8 S-1 Sensitizing dye V Below, IC and IL-1 each layer having the above composition is described above.

R-1, R-2, IL-2, G-1, B-1, Pr.

It shall be indicated by the abbreviation 2.

<Preparation of Sample No. 2~> Sample No. 1 except that the emulsions shown in Table 1 were used instead of the emulsions contained in G-1 and B-1 of Sample No. 1.

Samples No. 2, No. 3, and No. 3 were prepared in the same manner as in Example 1. In addition, when there were two or more types of emulsions contained in G-1 and B-1, sensitization was performed after mixing equal amounts of each.

In addition, by adding the diffusible DIR compound shown in Table-■ to Sample No. 1 to G-1 and B-1, Sample No.
, 4 to No. 5 were created.

Furthermore, by changing the diffusible DLR compounds of samples No. 5 and No. 6 as shown in Table 1, samples No. 7 to No.
Created IO.

Each sample was exposed to light through a wedge exposure and an MTF measurement chart according to a conventional method, and then processed through the following processing steps.

Processing steps: Color development 3 minutes 15 seconds bleaching 6 minutes 30 seconds water
Wash 3 minutes 15 seconds Fix
Wash with water for 6 minutes and 30 seconds
Stabilization for 3 minutes and 15 seconds Drying for 1 minute and 30 seconds The composition of the treatment liquid used in each treatment step is shown below.

Color developer 4-amino-3-methyl-N-(β-hydroxyethyl)-aniline sulfate 4.75 g Anhydrous sodium sulfite 4.25 g Hydroxylamine l/2 sulfate 2.0 g Anhydrous potassium carbonate 37.5 g potassium bromide
1.3 g nitrilotriacetic acid trisodium salt (l hydrate) 2.5 g potassium hydroxide 1.0 g Add water to make 1Q and adjust pH to 10.02.

Bleach solution Iron ethylenediaminetetraacetic acid (1) Ammonium salt 100.0g Ethylenediaminetetraacetic acid 2 Ammonium salt 10.0g Ammonium bromide 150.0g Glacial acetic acid
Add 10.0g water and
Q and p using ammonia water.

Adjust to 6.0.

Fixer Ammonium thiosulfate 175.0g Anhydrous ammonium sulfite 8.6g Sodium metasulfite 2.3g Water was added to make Iff, and the pH was adjusted to 6.0 using acetic acid.

Stabilizing liquid formalin (37% aqueous solution) 1.5o+
Q Konidax (manufactured by Konica Corporation) 7.511IQ Add water to make If.

The blue-sensitive emulsion layer and green-sensitive emulsion layer of the developed samples were evaluated by sensitometry, and the exposure latitude of each sample was determined.

In addition, for each sample obtained, the sharpness (M T
F ) and graininess (RM S ) were measured.

The sharpness improvement effect is due to the MTF (Modulat) of the dye image.
ionTransfer Function),
The MTF value at 30 pieces/III is sample No. 1 is 10
It is expressed as a relative value with 0.

The RMS value is the standard deviation of the variation in the concentration value that occurs when scanning the minimum concentration + 1.2 with a microdensitometer with a circular scanning aperture of 25μ.
It is expressed as a relative value.

Therefore, the smaller the value, the better the graininess.

As is clear from Table 3, the samples of the present invention have good graininess and sharpness, have a wide latitude, and are also superior in grain stability.

Example-2 Sample No. of Example-1, except for the R-2 layer of 1 = 10, the emulsion of R-i was changed from EQI-2 to EQI-1, Em
Sample No. 1 was prepared in the same manner as Sample No. 1-No. 1-O, except that it was changed to the iso-situation compound of -2゜E-Ro 3, and the coating amount of each component of R-1 was increased by 1.5 times. ,1
l-No. 20 was created.

The samples thus prepared were evaluated in the same manner as in Example 1. The results obtained are shown in Table-4.

Note that R-1, that is, red sensitivity γ1. The exposure latitude of the agent layer was 3.0 or more in all cases.

As is clear from Table 4, the samples of the present invention are excellent in procedural correction exposure latitude, graininess, sharpness, and processing stability.

■Display of incident 1988 Patent Application No. 264591 2. Name of the invention Silver halide color photographic material 3. Person who makes corrections Relationship to the case Patent applicant

Claims (1)

[Claims] A halogenated material having blue-sensitive, green-sensitive, and red-sensitive color-sensitive silver halide emulsion layers on a support, and at least one color-sensitive silver halide emulsion layer is composed of a single layer. A silver halide color photographic material, characterized in that at least one of the single layers contains a diffusive DIR compound, and the single layer has an exposure latitude of 3.0 or more. material.