JPH0419644A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To enhance sensitivity and image quality and to improve resistance to safelight and fogging due to infrared sensor light by adding silver halide grains containing a specified amount of iridium and sensitized with gold and a specified amount of silver chloride into a silver halide emulsion layer. CONSTITUTION:The silver halide photographic emulsion layer contains the silver halide grains each outer half of which contains an similar amount or more of iridium to or than that contained in the inner half of the grain having been growned up to the half volume of the grain, and these silver halide grains are sensitized with gold, and they comprises the silver chloride in an amount of >=50mol% of the silver halide, thus permitting the obtained silver halide photographic sensitive material to be enhanced in sensitivity and image quality and improved in the safety of the safe light and resistance to fogging due to the infrared sensor light.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a silver halide photographic material, and in detail,
This invention relates to a photosensitive material with improved safelight properties and infrared sensor light fog.

[Background of the invention]

In recent years, He-Ne lasers, LEDs, and semiconductor lasers have been commonly used as light sources for facsimiles. In the case of a facsimile machine using such a light source, various characteristics are required of the photosensitive material used. For example, for LE[l (emission wavelength 660 nm), it is preferable that the silver halide photographic light-sensitive material has sufficient photosensitivity and that the sensitivity is as high as possible. In particular, as the speed of facsimile machines has increased in recent years, there has been a demand for photosensitive materials with even higher sensitivity.

This tendency is particularly pronounced for high-intensity exposures of 10-' seconds or less.

Generally, in order to increase the spectral sensitivity in the red wavelength region, US Pat. , No. 280, etc., are known. Also, JP-A-62-62355, JP-A-63
Supersensitization described in No. 109436 and the like is known.

The above-mentioned dye is used as a material for an LED light source, and silver halide grains are doped with iridium to provide high illuminance characteristics to increase sensitivity, but with increased sensitivity, safelight properties and infrared sensor light fog deteriorate. It ends up. In addition to higher sensitivity, there is also a demand for higher image quality, and conventional grains containing less than 50 mol % of silver iodobromide or silver chloride have not been sufficiently satisfactory in terms of image quality.

[Purpose of the invention]

In order to solve the above-mentioned problems, an object of the present invention is to provide a silver halide photographic material which has high sensitivity, high image quality, and has improved safelight properties and infrared sensor light fog.

[Structure of the invention]

The above object of the present invention is to provide a silver halide photographic light-sensitive material having at least one silver halide photographic emulsion layer on a support, in which the silver halide grains contained in the silver halide photographic emulsion layer have a volume ratio of 2. The outside of the particle, which has a volume ratio of 1/2, contains the same amount or more iridium than the inside, which has grown to 1/2 the volume of the particle, and the particle has grown to 50% iridium.
This is achieved by a silver halide photographic material comprising silver chloride in an amount of mol % or more, and whose grains are gold-sensitized.

Hereinafter, the present invention will be explained in detail.

The silver halide emulsion used in the light-sensitive material of the present invention includes:
As the silver halide, silver chloride bromide or silver chloroiodobromide with an amount of silver chloride of 50 moles or more 9 tI is used, and more preferably silver chloride or more than 60 moles 9+ is used.

The silver halide grains may be obtained by any of the acid method, neutral method, and ammonia method, and preferably have a grain size of 0.2 μm or more and 0.5 μm or less.

A water-soluble iridium salt is added to the silver halide grains used in the emulsion of the present invention during the grain formation process, and the salt is incorporated outside the emulsion grains. In this case, the outside of the grain is preferably 1/2 or less, more preferably 1/10 or less of the emulsion grain volume, and is most preferably contained within the grain surface.

The amount of grains added is 10-8 per mole of silver halide.
~10 −1 mol is preferred.

Examples of the iridium salt include potassium hexabromoylinate, potassium hexabromoylinate, and the like.

Silver halide grains may have a uniform silver halide composition distribution in the grains, or may be core/shell grains in which the interior and surface layers of the grains have different silver halide compositions, or they may be mainly formed inside the grains. Particles such as

Any shape of the silver halide grains according to the present invention can be used. One preferred example is a cube having a (100) plane as a crystal surface.

Also, U.S. Patent Nos. 4.183.756 and 4.225.6
6fi issue, JP-A-55-26589, JP-A-55-4
Specifications such as No. 2737, The Journal of Photographic Science (J, Photogr.
Particles having shapes such as octahedrons, tetradecahedrons, dodecahedrons, etc. can be prepared by the method described in literature such as Sci., 21.39 (1973), and used. Furthermore, particles having twin planes may be used.

When the silver halide grains according to the present invention have a single shape, this is the diameter thereof, and when the grains have a shape other than spherical, the diameter is the diameter when the projected image is converted into a circular image of the same area.

The particle size can be obtained, for example, by photographing the particles with an electron microscope at a magnification of 10,000 to 50,000 times and measuring the printed particle diameter or projected area. (The number of grains to be measured shall be 1000 or more indiscriminately.) In the present invention, particularly preferred highly monodisperse emulsions have a monodispersity of 20D or less, more preferably 15 or less. be.

Monodispersed emulsions are disclosed in JP-A-54-48521 and JP-A-58-49.
It can be obtained by referring to No. 938 and No. 60-122935.

Gold compounds used for chemical sensitization include gold chloride hydrochloride acid, potassium chloraurate, gold sulfide, gold iotide, ammonium chloroaurate, and the like. The amount of the additive is preferably 10-' to 10-7 mol per mol of silver halide. It can also be used in combination with the sensitization method described below. Preferably, gold-sulfur sensitization is used in combination.

For chemical sensitization, Glafkides or 2eli
Kman et al., or H.
Die
Gr-undlagen der Photograp
hischen Prozesse mit Silb
Erhalogeniden Akademicche
Verlagsgesel] -5chaft, 1
968) l: The method described can be used. That is, a sulfur sensitization method using a sulfur-containing compound capable of reacting with silver ions or active gelatin, a reduction sensitization method using a reducing substance, and a noble metal sensitization method using gold or other noble metal compounds can be used. As the sulfur sensitizer, thiosulfates, thioureas, thiazoles, rhodanines, and other compounds can be used, and specific examples thereof are described in U.S. Pat. No. 689, No. 2.278947, No. 2.728.668, No. 2.728.668, No. 2.728.668, No.
3.656.955. As the reduction sensitizer, stannous salts, amines, hydrazine derivatives, formamide disulfinic acid, silane compounds, etc. can be used, and specific examples thereof are described in U.S. Patent No. 2.487.85.
No. 0, No. 2,419, No. 974, No. 2.518.69
No. 8, No. 2.983.609, No. 2, 983.61
No. 0, No. 2.694.698.

For noble metal sensitization, complex salts of metals in group I of the periodic table, such as platinum, iridium, and palladium, can be used, as well as complex salts of metals in group I of the periodic table, such as platinum, iridium, and palladium.
2.448.060, British Patent No. 618.061, etc.

When carrying out the present invention, for example, 4-hydroxy-6-methyl-1,3,
Various stabilizers can also be used, including 3a,7-tetrazaindene, 5-mercapto-1-phenyltetrazole, 2-mercaptobenzothiazole, and the like. Furthermore, if necessary, a silver halide solvent such as a thioether, or a crystal habit control agent such as a mercapto group-containing compound or a sensitizing dye may be used.

In the emulsion of the present invention, unnecessary soluble salts may be removed after the growth of silver halide grains is completed, or they may be left contained. When the salts are removed, the method described in Research Disclosure 1F No. 643 can be used.

Various compounds can be added to the above-mentioned photographic emulsion in order to prevent a decrease in sensitivity and the occurrence of fog during the manufacturing process, storage or processing of the silver halide photographic light-sensitive material. That is, azoles such as hendithiazolium salts, nitroindazoles, triazoles, benzotriazoles,
Benzimidazoles (especially nitro- or halogen-substituted ones), terocyclic mercapto compounds such as mercapto compounds, mercaptothiazoles, mercaptotetrazoles (especially l-phenyl-5-mercaptotetrazole), mercaptopyridines, carboxyl groups, etc. The above-mentioned heterocycles having a water-soluble group such as a sulfone group, mercapto compounds, thioketo compounds such as oxazolinthione, azaindenes such as tetraazaindenes (especially 4
Many compounds known as stabilizers can be added, such as -hydroxy-substituted (1,3,3a,7)tetraazaindene It), benzenethiosulfonic acids, benzenesulfinic acids, and the like.

An example of a compound that can be used is the theory of the photographic process, by K. Mees.
Theory of the Photography
icProcess.

3rd edition, 1966), citing the original literature.

For more detailed examples and other methods of use, see, for example, U.S. Pat.
Reference may be made to the descriptions in No. 82.947, No. 4.021.248, or Japanese Patent Publication No. 52-28660.

Further, the silver halide photographic light-sensitive material of the present invention includes U.S. Pat. No. 3.411.911 and U.S. Pat.
12, Japanese Patent Publication No. 45-5331, etc., may be included.

The silver halide photographic material of the present invention may contain the following various additives. As thickeners or plasticizers, for example, U.S. Pat.
No. 15, Belgian Patent No. 762.833, US Patent No. 3
．． Substances described in the specifications of No. 767410 and Belgian Patent No. 588.143, such as styrene-sodium maleate copolymer, dextran sulfate, etc.
Hardeners include various hardeners such as aldehyde, evoquin, nytyleneimine, active 110gen, vinyl sulfone, isocyanate, sulfonic acid ester, carbodiimide, mucochloric acid, and anroyl, and ultraviolet absorbers. As an agent, for example, U.S. Patent No. 3.253.92
No. 1 and British Patent No. 1.309.349, particularly 2-(2'-hydroquine-5
-tertiary butylphenyl)benzotriazole, 2-(2
'-Hydroquine-3'5'-di-tertiary butylphenyl)benzotriazole, 2-(2-hydroxy-3'
-tertiary butyl-5'-butylphenyl)-5-chlorobenzotriazole, 2- (2'-hydroxy-3'
Examples include 5'-di-tertiary butylphenyl)-5'chlorobenzotriazole. Further, as coating aids or surfactants used to control various physical properties of photosensitive materials, British Patent No. 548.
No. 532, No. 1.216.389 U.S. Patent No. 2.02
No. 6.202, No. 3.514.293, Special Publication No. 1977-
No. 26580, No. 43-17922, No. 43-179
No. 26, No. 43-3166, No. 43-20785,
French patent number 202.588, Belgian patent number 773.4
Anionic, cationic, non-sulfuric or amphoteric compounds described in No. 59, JP-A-48-1ol-118, etc. can be used, among which anionic surfactants having a sulfonic group, For example, succinic acid ester sulfonates, alkyl hanzene sulfonates, and the like are preferred. In addition, as an antistatic agent,
No. 159, JP-A-48-89979, U.S. Patent No. 2.8
No. 82.157, No. 2.972.535, Japanese Unexamined Patent Publication No. 1972
-20785, 48-43130, 48-90
No. 391, Special Publication No. 46-24159, No. 46-393
No. 12, No. 48-43809, JP-A No. 47-3362
There are compounds described in each publication of No. 7.

In the manufacturing method of the present invention, the pH of the coating liquid is 5.3 to 7.
．． It is preferable that it is in the range of 5. For multi-layer coating,
It is preferable that the pH of the coating liquid obtained by mixing the coating liquids for each layer in the ratio of coating amounts is within the above range of 5.3 to 7.5. If the pH is less than 5.3, the progress of hardening will be slow, which is undesirable, and if the pH is greater than 7.5, it will adversely affect photographic performance, which is undesirable.

In the light-sensitive material of the present invention, the constituting layer may include a capping agent, for example, Nlica described in Swiss Patent No. 330.158, glass powder described in French Patent No. 1.296.995, British Patent No. 1.
．． Inorganic particles of alkaline earth metals or carbonates of cadmium, zinc, etc. as described in US Pat. No. 173.181
．． Starch as described in No. 322.037, Hergie Patent No. 625
．． 451 or British Patent No. 981.198, polyvinyl alcohol described in Japanese Patent Publication No. 44-3643, polystyrene or polymethyl methacrylate described in Swiss Patent No. 330.158,
Organic particles such as polyacrylonitrile as described in US Pat. No. 3,079,257 and polycarbonate as described in US Pat. No. 3,022,169 may be included.

In the photosensitive material of the present invention, the constituent layers include slipping agents, such as U.S. Pat.
higher alcohol esters of higher aliphatics as described in U.S. Pat. No. 3,295.979, casein as described in U.S. Pat. No. 384, U.S. Pat. No. 3.042
．． 522 and 3.489.567. Dispersions of liquid paraffin and the like can also be used for this purpose.

The photosensitive material of the present invention may further contain various additives depending on the purpose. These additives are described in more detail in Research Disclosure Vol. 176 I Le
m17643 (December 1978) and Vol. 187, Item B716 (November 1979), and the photographic processing of the silver halide photographic light-sensitive material according to the present invention is not particularly limited, and various methods can be used. .

The processing temperature is usually chosen between 18°C and 50°C,
The temperature may be lower than 18°C or higher than 50°C.

The developing agents used in the black and white developer used in the present invention are dihydroquinebenzenes (e.g. hydroquinone), 3-pyrazolidones (e.g. 1-
phenyl-3-pyrazolidone), amine phenols (
For example, N-methyl p-aminophenol) can be used alone or in combination.

The silver halide photographic material of the present invention may be photographically processed using a developer containing imidazoles as a silver halide solvent. It is also possible to process with a developer containing a silver halide solvent and an additive such as indazole or triazole. The developing solution generally contains various other preservatives, alkaline agents, p)l buffers, antifoggants, etc., and further contains dissolving aids, toning agents, development accelerators, and surfactants as necessary. , an antifoaming agent, a water softener, a hardening agent, a viscosity imparting agent, and the like.

It is also possible to perform a so-called "lith type" development process. As a special type of development processing, a method may be used in which a developing agent is contained in the light-sensitive material, for example, in an emulsion layer, and the light-sensitive material is treated with an aqueous alkaline solution to perform development. Among the developing agents, hydrophobic ones are Research Disklorer 1.
It can be included in the emulsion layer by the method described in No. 69 et al. Such development treatment may be combined with silver salt stabilization treatment using thiocyanate.

As the fixer, one having a commonly used composition can be used. The fixing solution may contain a water-soluble aluminum salt as a hardening agent.

The exposure for the photographic emulsion used in the present invention varies depending on the state of chemical sensitization, the purpose of use, etc.
Various light sources such as fluorescent lamps, arc lamps, mercury lamps, xenon sunlight, xenon flashes, cathode ray tube flying spots, laser beams, electron beams, X-rays, and fluorescent screens for X-ray photography can be used as appropriate.

The exposure time is 1/1000~. In addition to the normal 100 second exposure, xenon flash, cathode ray tube, and laser light can
Short exposures of 1/10-' to 1/10-' seconds are applicable.

〔Example〕

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

Example 1 (Preparation of Emulsion A %) Solution-1 Water acl Seratin 0, 1N NHNO+ The following compound a19o solution Compound a Na00C(CH2)2Coo(C,H,O)m(C+
) I, ○) COONa m+ n=5.7 3.1 g 7g 0rn1 7(C2HiO)ncOcH+ Solution-2 Water gelatin aC Br 0.01% aqueous solution of hexachloride Potassium salt 70rn1 16.5g 1g 47 g 1 〇- Solution-3 Water gelatin aCI Br 0.001% aqueous solution of potassium hexachloroiridate salt 67〇- 16.5g 1g 47g 5rnl Solution-4 Water 0.1N HNO3 Silver nitrate 1.341' 00g Insulated at 40℃ pH 3, OpAg in the above solution-1
Add the above solution-2 and solution-4 at the same time while maintaining the temperature of
Addition is started and the addition is completed in 100 minutes. Furthermore, 1
After stirring for 0 minutes, the pH was adjusted to 6.0 with an aqueous sodium carbonate solution, and a 20% aqueous solution of magnesium sulfate (630) and a 5% aqueous solution of polynaphthalenesulfonic acid (830) were added to flocculate the emulsion at 40°C. , decant and wash with water to remove excess salts from the aqueous solution. Next, 71 water was added to disperse the mixture, 330 rnl of 20% magnesium sulfate aqueous solution was added again, and the excess salt in the aqueous solution was similarly removed. Add 71 more water to disperse, add 230% 20% magnesium sulfate aqueous solution,
Remove the salt. Add 750 g of water and 5 J of gelatin to this, and disperse at 55° C. for 30 minutes. As a result, silver bromide 70mo 1%, silver chloride 30mo 1%, average particle size 0.
364 m, a monodispersity of 9, and particles containing more iridium in the core part than in the nonyl part with a volume ratio of 1/2 were obtained.

(Preparation of emulsion B) Solution-5 Water
670-gelatin 16
5g NaC13] g KBr 147 g
Solution-6 Water
670d gelatin 1
6.5g NaCl3
1g KBr 147
g 0.01% aqueous solution of potassium hexachloroyl laminate 10- 0.001% aqueous solution of potassium hexabromorone laminate 35- Solution-5 in place of solution-2, solution-5 in place of solution-3 Solution-6
The rest was carried out in the same manner as when preparing emulsion A, whereby silver bromide 70mo 1% silver chloride 30%, average grain size 0
．． Particles with a weight of 36 g, a monodispersity of 9, and a volume ratio of 1/2 in which the outside contains more iridium than the inside are obtained.

(Preparation of emulsion C) Same as when preparing emulsion A, except that solution-5 was used instead of solution-2, and 10-1% aqueous solution of potassium hexachloroiridate salt was added immediately after the addition of solution-3. Go to. With this, silver bromide 70% silver chloride 30mo
1%, average particle size. Particles having a diameter of 36 μm, a degree of monodispersity of 9, and containing ilinium on the particle surface were obtained.

(Preparation of emulsion) Solution-7 Water gelatin aCI Br Hexachloroiridate potassium salt 0.01% aqueous solution 707d 65g 2g 05g ornl Solution-8 Water gelatin aCI Br Hexabromorhoridate potassium salt 0.001% aqueous solution 67〇-16 , 5g 2g 05g Instead of solution-2, use ra, -7; instead of solution-3, use e, -8, and otherwise proceed in the same manner as when preparing emulsion A, thereby obtaining silver bromide 50mo 1%. , silver chloride 50m
o 1%, an average particle size of 0.364 m, a monodispersity of 9, and a volume ratio of 1/2 of particles containing more iridium inside than outside.

(Preparation of emulsion E) Solution-9 Water gelatin aCI Br 67〇- 1θ, 5g 2g 05g Solution-10 Water gelatin aCI Er Hexachloroiridium acidity 0.01% aqueous solution 16.5g 2g 05g Lium salt l〇- Hexabromorone Potassium lamic acid salt 0.0O15'6 aqueous solution 3.5- Solution-9 instead of solution-2, solution-i instead of solution-3
! -10, and the other steps were the same as when preparing emulsion A, resulting in 50 mol of silver bromide! '6, silver chloride 50m
o 1%, an average particle size of 0.36 μm, a monodispersity of 9, and a volume ratio of 1/2 of particles containing more iridium in the outside than in the inside.

(Preparation of emulsion F) Add 0.01% aqueous solution of hexachloroiridate potassium salt l〇 immediately after the addition of solution-8 with molten eL-9 instead of solution-2 and solution-8 instead of solution-3. death,
The process was carried out in the same manner as when preparing the emulsion, except that it was stirred for 30 minutes.
Particles having an mo of 1%, an average particle diameter of 0.36 μm, a monodispersity of 9, and iridium included on the particle surface were obtained.

(Preparation of emulsion G) Solution-11 Water gelatin aCI Br Hexachloroiridium acidity 0.01% aqueous solution 70rn1 16.5g 3g 2g Lium salt 1〇- Solution-12 Water
67〇-gelatin 16.
5g NaCl 83
gKBr 42g Potassium hexabromorodate salt 0,001% aqueous solution 3.5-Solution-12, otherwise the same procedure as in preparing emulsion A was carried out, whereby silver bromide 20mo 1%, silver chloride 30mo
1%, an average particle diameter of 0.36 μm, a monodispersity of 9, and a volume ratio of 1/2 of particles containing more iridium inside than outside.

(Preparation of emulsion H) Solution-13 Water-ceratin aC Br 67〇- 65g 3g 2g Solution-14 Water-ceratin aCI Br Hexachloroiridate potassium salt 0.01% aqueous solution Hexabromorodate potassium salt 0001% aqueous solution 65g 3g 2g 0rn1 3 .5- Proceed in the same manner as when preparing emulsion A, except using solution-13 instead of solution-2 and solution-14 instead of solution-3, whereby silver bromide 20mo 1% and silver chloride 80mo
1% average particle size 0.36μm, monodispersity 9, volume ratio 2
Particles are obtained that contain a fraction of the iridium on the outside than on the inside.

(Preparation of Emulsion ■) Solution-13 was used instead of Solution-2, Solution-12 was used instead of Solution-3, and after the addition of Solution-12, a 0.01% aqueous solution of potassium hexachloroiridate salt was added. The process was carried out in the same manner as when preparing emulsion A, except for stirring for 30 minutes. This resulted in silver bromide 20mo 1% silver chloride 80mo 1% with an average grain size of 0.36μ, a monodispersity of 9, and iridium on the grain surface. Encapsulated particles are obtained.

(Chemical Ripening) The emulsions A, B5C5D, E, FSGSH, and I are divided into two equal parts, A-1 to I-1 and A-2 to 1-2.

The temperature of each emulsion of A-1 to I-, 1 was raised to 57°C, and 1
% citric acid aqueous solution 20-15% potassium bromide aqueous solution 8r
Add 0.2% chloroauric acid 9.5i, 0.2
75% sodium thiosulfate was added for ripening to achieve maximum sensitivity. Next, 400 rnl of 1096 gelatin solution containing 0.5% solution of 1-phenyl-5-metscaptotetrazole, 12.5 J, and 4.5 g of 4-hydroquine 6-methyl-1,3,3a17-tetrazaindene was added. After stopping the ripening, 20 ml of 10% potassium bromide aqueous solution was added, and the temperature was lowered to 50°C. When the emulsion temperature reaches 506C, add solution-15 shown below.

Solution-15 Water
40ml methanol
134-(CH2)3SOρ Emulsions A-2 to l-2 were prepared without adding chloroauric acid, and the others were A-
Aging and color sensitization were performed in the same manner as in 1 to I-1.

Emulsion 1 of each of A-1 to l-l5A-2 to j-2 (30rnl of a 20% aqueous solution of saponin manufactured by Merck, 0.5N
NaOH5mJ, 20% l\hydroquinone solution 52
．． 5m/, 1 phenyl-3-pyrazolidone 2% solution7.
5i, high molecular weight polymer latex 20% solution 107-
1. Adding 90ml of a 4% aqueous solution of styrene-maleic acid polymer as a thickening agent, formalin and 1-hydroxy-35-hydroxy-3,5-dichlorotriazine sodium salt as a hardening agent, the above emulsion was prepared.) \4.4 g/ffl of silver on a subbed bo 1 ethylene terephthalate support coated with an anti-ration layer.

Adjust the amount of gelatin to 1.7g/rrf, and add
As a protective film, a surface-active il was added to an aqueous solution of 60 g of gelatin.
Bis-(2-ethylhexyl) sulfocono phosphoric acid ester was added as l, 15 g of amorphous phosphoric acid with an average particle size of 3.5 μm was added and dispersed, and gelatin was added at 0.8 g/r+.
′? The emulsion layer and the protective layer were coated at the same time.

Evaluation method> The sample thus obtained was exposed to light using a facsimile machine (FT-503) manufactured by Matsushita Electric Transmission Co., Ltd. Next, the exposed sample was processed using Konica's GR
-26SR automatic processor under the following conditions. Sensitivity is expressed as a relative value with sample 1 set as 100. Halftone quality is 1
-18 samples were evaluated on a five-point scale, with the worst one being 1 and the best one being 5.

Further, a Konica PDA65 was used as a densitometer.

Processing conditions Development time 38°C 12 seconds Fixing time 36°C 12 seconds Washing time Room temperature 10 seconds Drying time 50°C 10 seconds Developer formulation Pure water (ion exchange water) 800i Disodium ethylenediaminetetraacetate 2g Diethylene glycol 25g Potassium sulfite (55%)
W/V aqueous solution) 60-Callum carbonate
15g hydroquinone
20g 5-methylbenzotriazole 300■
1-phenyl-5-mercaptotetrazole 60 ■ Calum hydroxide 10.5 g Potassium bromide 3.5 g 1-phenyl-4 4-dimethyl-3-pyranlidone 300 ■ When using the developer, add pure water to make it 11. Using. pH was 10.8.

Fixer composition (composition A) Ammonium thiosulfate (72.5% W/V aqueous solution) 24
〇- Sodium sulfite 17g Sodium acetate trihydrate 6.5g
acid
6g Sodium citrate dihydrate 24 Acetic acid (90% W/V aqueous solution) 13.6J (composition) Pure water (ion exchange water) 17- Sulfuric acid (50% W/V aqueous solution e) 47g
Aluminum sulfate (AAt (h equivalent content: 8.1% W/V aqueous solution) 26
, 5 g When using a fixer, the above composition A was dissolved in the order of composition A and composition 11 in 500 ml of water and used. The pH of this fixer
was about 4.6.

To evaluate the infrared sensor light fog, the part of PT-503 that was exposed to the infrared sensor light was placed with the banking layer facing the sensor side and irradiated for 30 minutes. At this time, the sensor light intensity was adjusted to be 20 times that of normal use. In addition, the safelight property was determined by placing the sample directly under a 5c (EL) safelight manufactured by Konica Corporation 1 m and irradiating it for 5 minutes. Both were subjected to the same development process as above, and DT-
Fog values were measured at 0 minutes and 30 minutes and between 0 minutes and 5 minutes using a 101 dotmeter, and the difference was evaluated. The results are shown in Table 1, and as is clear from Table 1, the product of the present invention has high sensitivity, high image quality, and improved safety of the infrared sensor optical head IJ and safelight (with no effort required). .

5 Effects of the Invention According to the present invention, it has been possible to provide a silver halide photographic light-sensitive material with high sensitivity, high image quality, and improved infrared sensor fog and safelight safety.

Claims (1)

[Claims] In a silver halide photographic light-sensitive material having at least one silver halide photographic emulsion layer on a support, the silver halide grains contained in the silver halide photographic emulsion layer are grown to one half in volume ratio. The outer part, which is half the volume of the particle, contains the same amount or more iridium than the inner part, and the particle is composed of 50 mol% or more of silver chloride, and the particle is gold enriched. A silver halide photographic light-sensitive material characterized by being