JPH03235938A - Silver halide photographic sensitive material suppressed in performance fluctuation - Google Patents

Abstract

PURPOSE:To obtain the silver halide photographic sensitive material which is free from performance fluctuation among lots by incorporating a silver halide emulsion layer contg. polyalkylene oxide compds. into this material and incorporating a silver halide emulsion which is subjected to flocculation and desalting by using an inorg. settling agent into this emulsion layer. CONSTITUTION:This photosensitive material has the silver halide emulsion layer contg. at least one kind of the polyalkylene oxide compds. This emulsion layer is subjected to the flocculation and desalting by using the inorg. settling agent and the polyalkylene oxide compds. are used. The amt. of the compds. to be used is preferably in a 1X10<-5> to 1X10<-2> mol range per 1mol silver halide. The silver halide photographic sensitive material which is suppressed in the fluctuation in the photographic performance among the lots is obtd. in this way.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a silver halide photographic material, and in detail,
The present invention relates to a silver halide photographic material with suppressed fluctuations in performance.

[Background of the Invention] Various silver halide photographic materials have been proposed in the past, but when these materials are industrially produced, there is no variation in performance from product to product, and it is difficult to have constant photographic performance. requested.

However, in reality, photographic performance may vary between lots during product manufacturing. Therefore, there is a need for a photosensitive material that can prevent such variations between lofts and provide consistent performance.

However, in the prior art, no photosensitive material has yet been proposed in which the variation in photographic performance between lofts is sufficiently small and is therefore fully satisfactory in this respect.

[Purpose of the invention]

An object of the present invention is to solve the above-mentioned problems and provide a silver halide photographic material that does not have performance variations between lofts.

[Structure of the invention]

The above object of the present invention has a silver halide emulsion layer containing at least one polyalkylene oxide compound,
Moreover, the emulsion layer is achieved by a silver halide photographic light-sensitive material characterized in that the emulsion layer contains a silver halide emulsion that has been coagulated and desalted using an inorganic precipitant.

As a result of various studies, the present inventor has found that coagulation desalting can be carried out using conventionally employed organic precipitants when preparing emulsions, i.e., when an organic precipitant such as a formalin condensate of naphthalene sulfonate is used. It has been found that this precipitant may remain in the photographic emulsion and have an unfavorable effect on photographic performance, causing the above-mentioned problem of performance fluctuation.

This tendency is particularly pronounced for photosensitive materials containing polyalkylene oxide compounds (used to increase contrast when forming photosensitive materials for printing and to perform other functions as surfactants). I also learned that. It has also been found that the problem is especially serious when lithography is used as the development process. That is, Lith development in particular is called contagious development, and it has been found that in this development, fluctuations in the amount of organic precipitant remaining in the emulsion have a great effect on the contagious developability. .

Because it is a contagious disease, the effects are particularly pronounced.

The present inventor has conducted further research based on this knowledge by the present inventor, and has arrived at the present invention.According to the present invention, inorganic precipitates can also be used for photographic materials containing polyalkylene oxide compounds. The above problem can be solved by performing coagulation desalting using an agent. Further, this effect can be obtained no matter what kind of development process is used, for example, lithography. Therefore, regarding photosensitive materials to which lithographic development is applied, which has had the above-mentioned problems in the past,
It can be said that the present invention can exhibit particularly remarkable effects.

In addition, in the present invention, fluctuations in performance between lofts are suppressed by coagulating desalting using an inorganic precipitant, while on the other hand, as a prior art, Japanese Patent Application Laid-Open No. 62-232645 discloses a method using an inorganic precipitant. Although there is a disclosure of a technique for eliminating coating operations by coagulating desalting, there is no suggestion of performance fluctuations, and this is a technique unrelated to the present invention.

The present invention will be explained in more detail below.

The light-sensitive material of the present invention has a silver halide emulsion layer containing at least one polyalkylene oxide compound. This emulsion layer was coagulated and desalted using an inorganic precipitant. Such an emulsion layer is hereinafter referred to as "emulsion layer of the present invention".
Also called. At least one emulsion layer of the present invention containing such a polyalkylene oxide compound and an emulsion desalted with an inorganic precipitant may be present in the light-sensitive material,
Of course, two or more layers may be present. Even if the light-sensitive material of the present invention is a so-called double-sided light-sensitive material in which a silver halide emulsion layer is coated on both sides of a support constituting the light-sensitive material, the silver halide emulsion layer is coated on one side of the support. It may be a so-called single-sided photosensitive material in which a non-photosensitive material such as a backing layer is formed on the opposite side. When two or more silver halide emulsion layers are present, it is natural that emulsion layers other than the emulsion layer of the present invention may be present.

In the present invention, polyalkylene oxide is a general term for compounds having a chemical structure formed by polymerizing two or more alkylene oxide units.

Polyalkylene oxides used in the photosensitive material of the present invention include the following.

For example, an alkylene oxide having 2 to 4 carbon atoms, such as ethylene oxide, propylene-1,2-oxide, butylene-1,2-oxide, etc., preferably a polyalkylene oxide consisting of at least 10 units of ethylene oxide, water, and an aliphatic alcohol. , condensates with compounds having at least one active hydrogen atom such as aromatic alcohols, fatty acids, organic amines, hexitol derivatives, or block copolymers of two or more types of polyalkylene oxides. That is, as polyalkylene oxide compounds, specifically, polyalkylene glycols, polyalkylene glycol alkyl ethers, polyalkylene glycol aryl ethers, polyalkylene glycol (alkylaryl) ethers, polyalkylene glycol esters, polyalkylene glycol fatty acid amides, polyalkylene Glycolamines, polyalkylene glycol block copolymers, polyalkylene glycol graft polymers, and the like can be used. The molecular weight is preferably 600 or more.

There is not only one polyalkylene oxide chain in the molecule,
Two or more may be installed. The lateral polyalkylene oxide chains may then consist of fewer than 10 alkylene oxide units, but it is preferred that the total number of alkylene oxide units in the molecule is at least 10. If there is more than one polyalkylene oxide chain in the molecule, each of them may consist of different alkylene oxide units, such as ethylene oxide and propylene oxide. The polyalkylene oxide compound used in the present invention preferably contains from 14 to 100 alkylene oxide units.

Specific examples of polyalkylene oxide compounds that can be used in the present invention are as follows.

Polyalkylene oxide compound example 1 ■0 (CHzCFlzO) q. ■CaH90 (
CHzCHgO)+sH C+JzsO(CHzCHzO)+514C+JstO
(CHzCHtO)+5H01 day■, F0(CHzCH
zO)4゜HCsH+, cH=CHCsH+1o(C
HzCHJ) lsH0 C++HzsCOO(CHtCHzO)a. HI3 C++HzsCOO(CHzCHzO)z40cc++
Hgs3 C++HisCONH(CHgCHgO)+sH5 C+ 4■1J(CHt) (CHtCHiO) g4
H0 HO (CHtCHzO) * (CHzCHzCHzC
HtO) b (CHtCHzO) -Ha+c=30
．． b=14 8 a + b + c = 50 b : a + c = 10: 9 0 As described above, for example, in JP-A-50-156423, JP-A-52-108130, and JP-A-53-3217. Polyalkylene oxide compounds can be used. These polyalkylene oxide compounds may be used alone or in combination of two or more.

When these polyalkylene oxide compounds are added to a silver halide emulsion, they are dissolved in an aqueous solution of an appropriate concentration or in a water-miscible low-boiling organic solvent and added at an appropriate time before coating, preferably. , can be added to the emulsion after chemical ripening. It may be added to non-photosensitive hydrophilic colloid layers, such as intermediate layers, protective layers, filter layers, etc., instead of being added to the emulsion.

In the present invention, the amount of polyalkylene oxide compound used is lXl0- per mole of silver halide.
A range of 5 moles to 1X10-'' moles is preferred.

Next, the emulsion layer of the present invention is coagulated and desalted with an inorganic desalting agent, and the coagulating desalting agent and the like that can be used therein will be described below.

In the present invention, as the inorganic desalting agent, any inorganic substance can be used as long as it has the function of coagulating desalting during the emulsion manufacturing process. For example, any one known in the art may be used. can. Specific examples include sodium sulfate, magnesium sulfate, ammonium sulfate, and ammonium nitrate.

Generally, in an emulsion, silver halide grains are dispersed in a hydrophilic binder such as gelatin as a protective colloid, but when gelatin is used, the gelatin concentration at the time of coagulation and precipitation is 0.3 to 2.0%. The ratio of silver to gelatin, calculated as silver nitrate, is preferably from 4:1 to 15:1.

By adjusting the pH to an appropriate value during coagulation and desalting and washing with water, desired sedimentation properties and washing efficiency can be achieved. Such pH adjustment can be performed using an acid or an alkali, and for the acid, citric acid, sulfuric acid, nitric acid, acetic acid, or any other suitable one; for the alkali, water 1 2 potassium oxide, Sodium hydroxide, sodium carbonate and other arbitrary substances may be used. pH during aggregation is 1.0-5
．． The pH during washing is preferably 5.0 to 0.
Preferably it is 7.0. If the precipitated particles become too large, the washing efficiency will decrease, but to avoid this, during aggregation]) H is increased by 1.0 or more, the gelatin concentration is 2% or less, and the silver to gelatin ratio is 4:1 or more. is preferred. On the other hand, in order to avoid particles becoming too small and difficult to precipitate, the pH at the time of aggregation was set to 5.0 or less, and the gelatin concentration was set to 0.3.
% or more, and the ratio of silver to gelatin is preferably 15:1 or less.

Although the silver halide composition used to form the emulsion layer of the present invention constituting the silver halide photographic light-sensitive material of the present invention, and the emulsion layers other than the emulsion layer of the present invention used as necessary, is not particularly limited. Silver chloride and silver chlorobromide are preferred, and silver chlorobromide containing 80 to 30 mol % of silver chloride is particularly preferred. The average grain size of silver halide grains is 0.05 to 0.
．． 7 μm is preferable, particularly preferably 0.05 to 0.4
It is μm. Further, it is preferable that at least 75% or more of the total number of particles is within a size range of 0.7 to 1.3 times the average particle size, and particularly preferably 80% or more of the total number of particles is within this range. It is.

When preparing the emulsion layer constituting the light-sensitive material of the present invention, particularly the emulsion layer of the present invention, a rhodium salt can be added to control the sensitivity or gradation of the silver halide emulsion.

It is generally preferable to add the rhodium salt at the time of grain formation, but it may also be added at the time of chemical ripening or at the time of preparation of the emulsion coating solution. The rhodium salt may be a simple salt or a double salt, and typical examples include rhodium chloride, rhodium trichloride, and rhodium ammonium chloride.

The amount of rhodium salt added may be arbitrarily changed depending on the required sensitivity and gradation, but a range of 10<-9> to 10<-4> mol per 1 mol of silver is particularly effective.

Furthermore, when using rhodium salts, other inorganic compounds such as iridium salts, platinum salts, thallium salts, cobalt salts, gold salts, etc. may be used in combination. In particular, iridium salts are often used for the purpose of imparting high-intensity properties, and are preferably used in amounts ranging from 10@-9 mol to 10@-4 mol per mol of silver.

Further, the emulsion constituting the light-sensitive material of the present invention may or may not be chemically sensitized. The emulsion may also contain a matting agent, polymer latex, and the like. In addition, it can contain a sensitizing dye and the like.

In addition, various additives can be used in the photosensitive material of the present invention depending on the purpose. These additives are described in more detail in Research Disclosure Vol. 176, 1.
tem17643 (December 1978) and Vol. 187 1te Endurance 8716 (November 1979), and the relevant parts are summarized in the table below.

5. Furthermore, there are no particular limitations regarding the exposure and development processing conditions for the photosensitive material of the present invention, and for example, the description in the aforementioned Research Disclosure Vol. 176, pages 28-30 can be referred to.

For example, developing agents used in the developer include dihydroxybenzene-based developing agents, 1-phenyl-3-pyrazolidone-based developing agents, and p-aminophenol-based developing agents, and these may be used alone or in combination (for example,
-phenyl-3-pyrazolidones and dihydroxybenzenes or p-aminophenols and dihydroxybenzenes). The light-sensitive material of the present invention may also be processed with a so-called infectious developer (lith developer) using a sulfite ion buffer such as carbonyl bisulfite and hydroquinone.

In the above, examples of the dihydroxybenzene-based developing agent include hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydrohydroquinone, methylhydroquinone, 2.
There are 3-dichlorohydroquinone, 2,5-dimethylhydroquinone, etc., and 1-phenyl-3-pyrazolidone type developing agents include 1-phenyl-3-pyrazolidone,
4.4-dimethyl-1-phenyl-3-pyrazolidone,
4-hydroxymethyl-4-methyl-1 phenyl-3-
Examples include pyrazolidone, 4,4-dihydroxymethyl-1-phenyl-3-pyrazolidone, and p-aminophenol, N-methyl-p-aminophenol, and the like can be used as the p-aminophenol developing agent.

A compound that provides free sulfite ions, such as sodium sulfite, potassium sulfite, potassium metabisulfite, and sodium bisulfite, can be added to the developer as a preservative. In the case of infectious developers, sodium formaldehyde bisulfite may be used, which provides very little free sulfite ion in the developer.

Examples of the alkaline agents used in the developer include potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, sodium acetate, potassium tertiary phosphate octate, jetanolamine, and triethanolamine. The pH of the developer is usually preferably set to 9 or higher, more preferably 9.7 or higher.

The developer solution may also contain organic compounds known as antifoggants or development inhibitors. Examples include azoles such as benzothiazolium salts, nitroindazoles, nitrobenzimidazoles, chlorobenzimidazoles, bromobenzimidazoles, mercaptothiazoles, mercaptobenzothiazoles, mercaptobenzothiazoles, mercaptothiadiazoles. , aminotriazoles, benzotriazoles, nitrohencitriazoles, mercaptotetrazoles (especially l-phenyl-5-mercaptotetrazole); frequent mercaptopyrimidines; mercaptotriazines; thioketo compounds such as oxazolinthione;
Azaindenes, such as triazaindenes, tetraazaindenes (particularly 4-hydroxy substituted (1,3,3a
.

7) Tetrazaindenes), pentaazaindene, etc.; benzenethiosulfonic acid, benzenesulfinic acid,
Examples include henzensulfonic acid amide and sodium 2-mercabutohentzimidazole-5-fulphonate.

The Lith developer particularly effective for processing the photosensitive material of the present invention is a hydroquinone developer with a fairly high sulfite ion concentration (0.2 mol/1 or more), but a high pH (10.5 mol/1 or more).
(above) This is a developer containing a nitroindazole compound. A system (quick squirrel technology, disclosed in Japanese Patent Application Laid-Open No. 58190943) that can obtain a high-contrast image is also known. Specifically, auxiliary developing agents (for example, 1-phenyl-3-pyrazolidones or p-aminophenols) are not contained at all or are limited to 0.05 g/2 or less, and dihydroxybenzenes are used as the main developing agent at zero. .05
~0.5 mol/l (particularly a developing solution containing 0.1 to 0.4 mol/l and a free sulfite ion concentration of 0.5 mol/l).
25 mol/I! , or more, contains 5- or 6-nitroindazole at least 20/42, and has a pH of 10
．． A developing solution containing a sufficient amount of alkali to make the average molecular weight 5 to 90 (particularly 11.5 or higher) is preferred. The light-sensitive material of the present invention is particularly effective when using dihydroxybenzenes (especially hydroquinone) alone without containing an auxiliary developing agent.

It is preferable that the developer that can be used in the present invention contains the same type of polyalkylene oxide as described above as a development inhibitor. For example, polyethylene oxide having a molecular weight of 1,000 to 10,000 can be contained in an amount of 0.1 to 10 g/2.

It is preferable to add nitrilotriacetic acid, ethylenediaminetetraacetic acid, triethylenetetraamine hexaacetic acid, diethylenetetraamine pentaacetic acid, etc. as a water softener to the developer that can be used in the present invention.

As the fixer, one having a commonly used composition can be used.

As the fixing agent, for example, in addition to thiosulfate, thiocyanate, and the like, organic sulfur compounds known to be effective as fixing agents can be used.

The fixing solution may contain a water-soluble aluminum salt as a hardening agent.

The fixer can also contain a complex of ethylenediaminetetraacetic acid and trivalent iron ions as a sulfurizing agent.

Although the processing temperature and processing time are appropriately set, a processing temperature of 18 DEG C. to 50 DEG C. is usually appropriate, and it is preferable to perform a rapid processing of 15 to 120 seconds using a so-called automatic developing machine.

The support for constituting the photosensitive material of the present invention is arbitrary, and includes, for example, baryta paper, polyethylene-coated paper, polypropylene synthetic paper, glass plate, cellulose acetate, cellulose nitrate, polyester film such as polyethylene terephthalate, polyamide film, Typical examples include polypropylene film, polycarbonate film, polystyrene film, and the like.

These supports are appropriately selected depending on the intended use of the silver halide photographic material.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples.

However, it goes without saying that the present invention is not limited to the examples described below.

Example 1 A silver chlorobromide emulsion was prepared using the following solutions A, B, and C manufactured by 1.

(Solution A) Ossein gelatin 85 g Polyisopropylene - 10% ethanol solution of polyethylene oxydisuccinate sodium salt 25 d Distilled water 6400 m (Solution B) Silver nitrate 850 g Distilled water
2050d (Solution C) Sodium chloride 225g Potassium bromide 137g 10% ethanol solution of polyisopropyleneoxydisuccinate sodium salt 15ai! Ossein gelatin 55g distilled water
2035adl solution A at 40°
After keeping the temperature at C, sodium chloride was added so that the EAg value was 160 mV.

Next, solutions B and C were added by a double jet method using the mixer described in JP-A-57-92523 and JP-A-57-92524.

The addition flow rate is as shown in Table 1 below, and the total addition time is 80
Gradually increase the addition flow rate over a period of EAg
The addition was carried out while keeping the amount constant as follows.

That is, the EAg value was changed from the initial 160 mV to 120 mV using a 3 mol/l aqueous sodium chloride solution 5 minutes after the start of addition, and this value was maintained thereafter until the completion of mixing.

In order to keep the EAg value constant, 3 mol/! An aqueous solution of sodium chloride was used to control the EA value.

3 4 Table 1 For the measurement of EA, a metal electrode and a double jump bond type saturated Ag/Agcl comparison electrode were used. As for the structure of the electrode, the double junction structure disclosed in Japanese Patent Application Laid-Open No. 57-197534 was used. Further, a variable flow rate roller tube metering pump was used to add solutions B and C.

Furthermore, during the addition, the emulsion was sampled and observed using an electron microscope to confirm that no new particles were generated within the system.

Further, during the addition, the pH value of the system was controlled to be kept constant at 3.0 using a 3% aqueous nitric acid solution.

After adding solutions B and C, this emulsion was subjected to Ostwald ripening for 10 minutes, then divided into 5 equal parts, and a 2=1 solution of magnesium sulfate and water, which is an inorganic precipitant, was added to each part to precipitate excess salt. Coagulation and desalting were performed. Emulsion pH at this time
were all 3.0.

After discharging the supernatant liquid so that the remaining amount was 270 cc, 2300 cc of distilled water was added, the pH was adjusted to 6.0 using a 10% aqueous potassium hydroxide solution, and water washing was performed with stirring for 10 minutes. Then, p
Lower the H to 4.5 and add magnesium sulfate and water again.
= 1 solution was added to cause precipitation, and coagulation desalting was performed. After repeating water washing and precipitation once again in the same manner, 600 mff1 of an aqueous solution of ossein gelatin (containing 30 g of ossein gelatin) was added to each emulsion, and the pH was adjusted to 5.8 using a 10% aqueous potassium hydroxide solution. Adjust to 55°C
After dispersion by stirring for 30 minutes, the volume was adjusted to 750 cc. The obtained emulsions were A-1, A-2, A-3, A-4,
It shall be A-5.

Preparation of Emulsion B After adding Solutions B and C in the same manner as Emulsion A, this emulsion was subjected to Ostwald ripening for 10 minutes, and then the pH was adjusted to 5.8 using a 3% aqueous sodium carbonate solution. Thereafter, the emulsion was divided into five equal parts, and a 5% aqueous solution of a formalin condensate of sodium naphthalene sulfonate as an organic precipitant was added to each part for precipitation. After draining the supernatant liquid so that the remaining volume is 270cc, add 2300cc of distilled water.
was added and washed with water with stirring for 10 minutes. Next, a 1:4 solution of magnesium sulfate and water, which is an inorganic precipitant, was added to cause precipitation, and coagulation and desalting were performed. In the same manner, after repeating water washing and precipitation using magnesium sulfate solution once more, each emulsion was mixed with an aqueous solution of ossein gelatin 6001.
d (containing 30g of ossein gelatin), and
The pH was adjusted to 5.8 using % potassium hydroxide aqueous solution and dispersed by stirring for 30 minutes at 55"C.
Prepared in c. The obtained emulsions were used as B-1, B-2, and B-3.
, B-4, and B-5.

Preparation of Emulsion C Emulsions C-1, (, -2, C-
3, C-4, and C-5 were obtained.

(Preparation, treatment and evaluation of samples) Next, all of the emulsions A-1 to C-5 obtained above were subjected to total sulfur sensitization, and 6-methyl-4-hydroxy-1,3,3a, 6-methyl-4-hydroxy-1,3,3a, and 7-thitrazaindene was added at 1 g per mole of silver halide. Furthermore, as a sensitizing dye, l-
(β-hydroxyethyl)-3-phenyl-5-[(3
-α-sulfopropyl-α-penzoxazolidene)-
Ethylidenecothiohydantoin is halogenated in the emulsion! Ji! It was added at 150 μm per mole.

Next, the aforementioned Compound Example 6 was used as a polyalkylene oxide compound, and 4% of this was added to each of Emulsions A-1 to A-5 and Emulsions B-1 to B-5 per mol of silver halide.
10 .mu. were added, but no addition was made to emulsions C-1 to C-5.

In addition, 300 mg of sodium p-dodecylbenzenesulfonate, 2 g of styrene-maleic acid co-78 polymer, and styrene-butyl acrylate were added to all emulsions.
Acrylic acid copolymer latex (average particle size 0.25μ
m) was added to prepare a coating solution for an emulsion layer so that the amount of silver at the time of coating was 3.5 g/ryf and the amount of gelatin was 2.0 g/ryf. At that time, as a spreading agent, 1-decyl-2-(3-isopentyl)succinate-2-sulfonic acid sodium was added in an amount of 30 mg/h and 5-nitrointasole was added as a spreading agent in an aqueous gelatin solution at an amount of 35 mg/mole per mole of silver halide. rrf
Add 25 mg of formalin as a hardening agent.
A coating solution for a protective layer was prepared in such a manner that: The coating solution for the emulsion layer and protective layer was prepared in Japanese Patent Application Laid-Open No. 59-1994.
Simultaneous multilayer coating was carried out on a polyethylene terephthalate film base subjected to subbing as described in Example (1) of No. 1. The obtained samples are referred to as samples A-1 to A-5, respectively, corresponding to the emulsions A-1 to C-5 used. These samples were exposed using an optical wedge. .

The above test sample was developed using a rapid squirrel developer CDL-271AB manufactured by Konica ■.

In addition, the fixer used had the following formulation.

Fixer formulation> (Composition A) Ammonium thiosulfate (72.5% aqueous solution) 230% Sodium sulfite 9.5g Sodium acetate trihydrate 15.9g Boric acid
6.7g Sodium citrate dihydrate 2g Acetic acid (90% oil aqueous solution) 8,1 d(
Composition) Pure water (ion exchange water) 17m sulfur
Acid (50%-/H aqueous solution) 5.8g aluminum sulfate (A f 203 equivalent content 8.1% W/H aqueous solution)
When using 26.5 g of fixer, add the above composition A to 500 g of water.
, and were dissolved in the order of composition and finished to II2 for use. The pH of this fixer was about 4.3.

The processing conditions were as follows.

Processing conditions: (Process) (Temperature) (Time) (Processing liquid tank capacity) Development 35°C 15 seconds Fixation at 20°C 34°C
15 seconds 20! Wash with water at 18°C for 10 seconds
11 Drying at 40°C for 10 seconds 202 For each sample developed as described above, a photographic characteristic curve was drawn, and the contrast and sensitivity were determined from this. Contrast was expressed as a gamma value for the exposure amount giving optical densities of 0.2 and 1.5.

Further, the sensitivity was determined from the reciprocal of the exposure amount required to form an optical density of 2 to 2.5, and was expressed as a relative sensitivity when sample A-1 was taken as 100. The results of determining the contrast and sensitivity are shown in Table 2. In addition, samples A-1 to A-5, B-
1 to B-5 and C-1 to C5 were formed in the same way from the same emulsions A, B, and C obtained by the same manufacturing method, and there should be no variation in performance. Variations may occur for each sample. Table 2 shows this performance variation in terms of sensitivity variation range for each group A, B, and C.

1 Sample A group is a photosensitive material that corresponds to the present invention, and sample B group and 0 group are for comparison.

As is clear from Table 2, samples A-1 to A- of the present invention
No. 5 has extremely high sensitivity stability compared to comparative samples B-1 to B-5. Comparative samples C-1 to C-5 that do not contain polyalkylene oxide exemplified compound 6 have good sensitivity stability, but have low contrast and high fog, and have poor performance as photosensitive materials, especially photosensitive materials for printing. The material is not usable.

〔Effect of the invention〕

According to the present invention, it was possible to provide a silver halide photographic material in which loft-to-loft variations in photographic performance were suppressed.

Claims (1)

[Claims] 1. It has a silver halide emulsion layer containing at least one polyalkylene oxide compound, and the emulsion layer contains a silver halide emulsion that has been coagulated and desalted using an inorganic precipitant. Silver halide photographic material.