JPH0915773A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE: To provide a technique for stably preparing flat silver halide grains high in an aspect ratio and in a silver chroride content and further to provide the flat silver halide grains high in sensitivity and low in fog and high in pressure blackening resistance and silver chloride content and to enable rapid processing and processing with low environmental pollution and processing with small replenishing and small discharge of waste solution in using the photosensitive material for photographing containing these flat silver halide grains. CONSTITUTION: The silver halide photographic sensitive material has at least one kind of silver halide emulsion (1) described below; flat silver halide grains (2) having an aspect ratio of >=2 and occupying 50-100% of the projection areas of the total us desalted and the emulsion is prepared by using this emulsion as seed crystals and the obtained emulsion (1) composed of the flat silver halide grains having an aspect ratio of >=2 and amounting to 50-100% of the projection areas of the total silver halide grains.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a method for preparing a seed crystal emulsion,
The present invention relates to a silver halide emulsion and a photographic light-sensitive material. In particular, it relates to a silver halide photographic light-sensitive material for photographing intended for rapid and low replenishment processing.

[0002]

2. Description of the Related Art Recent technological trends of silver halide photographic light-sensitive materials include research aimed at developing treatment replenishment and reduction of waste liquid amount, in parallel with the direction of reducing pollution mainly in developing treatment.
It is flourishing. In such a situation, it is effective to use silver chloride having a high solubility as a light-sensitive material, and a light-sensitive material composed of a fine grain silver halide emulsion which does not require relatively high sensitivity as in the case of a color printing paper light-sensitive material is actually used. In the material, silver chloride is advanced. However, a relatively large silver halide grain is required in a photographic light-sensitive material requiring high sensitivity, such as a medical X-ray photographic light-sensitive material, a general negative color film for photographing, a black-and-white negative film similarly. However, it has been difficult to realize such a highly sensitive silver halide emulsion in a region having a high silver chloride content. This is because silver chloride has the property of being more easily reduced because it has a property of being more easily reduced than conventionally used silver bromide and silver iodide. It is important to have a high aspect ratio in order to realize high sensitivity and high covering power, but in order to achieve a high aspect ratio, reduction is required in the case of a high silver chloride plate. It can be said that grain growth in the presence of a cheap high potential, high pH, or adsorptive crystal wall control agent for producing silver nuclei is essential.

For tabular grains having a high silver chloride content,
There are numerous prior art techniques. Examples of tabular grains having a {111} plane as a main plane include, for example, JP-B-64-83.
No. 26, No. 64-8325, No. 64-8324, JP-A No. 1-250943, Japanese Patent Publication No. 3-14328, Japanese Patent Publication No. 4-81782, Japanese Patent Publication No. 5-40298, No. 5
No. 39459, No. 5-12696 and JP-A-63-2.
13836, 63-218938, 63-28.
1149 and JP-A-62-218959 are listed. The prior art of tabular grains having a {100} plane as the principal plane is disclosed in JP-A-5-204073 and JP-A-5-20573.
1-88017 and JP-A-63-24238. In particular, JP-A-6-059360 describes a silver chloride-containing {100} plate. The reason why the tabular grains are used is that the color sensitization rate of the sensitizing dye is high and the sensitization is easy, the sharpness is improved, and the covering power is high. These are not limited to silver chloride flat plates, but are described in, for example, U.S. Patent Nos. 4,434,226 and 4,434.
414,310, 4,433,048, 4,4
14,306, 4,459,353, JP-A-58.
Nos. 119327 and 59-119350. However, for the reasons described above, the use of silver chloride tabular grains in the construction of a high-sensitivity photographic light-sensitive material has not been sufficient in terms of performance.

As a method for forming silver halide grains,
A so-called seed crystal method, which is a method of growing separately prepared seed particles, may be mentioned. By adopting the seed crystal method, it is possible to shorten the grain forming step, stabilize the manufacturing variability, and prepare monodisperse tabular grains with improved monodispersity. You can expect the effect that you can.

As such a seed crystal method, for example, Japanese Patent Publication No. 3-46811 discloses a particle forming method using a spherical seed crystal. Further, JP-A-6-250312 discloses a method of utilizing a seed crystal method in the case of silver iodobromide tabular grains, and describes a method of preparing tabular grains having a high aspect ratio. However, there is no description here of tabular grains having a high silver chloride content. Furthermore, there was no knowledge of tabular grains having the {100} plane as the principal plane.

Further, JP-A-61-112142 and JP-A-6-112142.
Nos. 2-58237 and 55-142329 disclose grain forming methods using multiple twin grains. This method is suitable for preparing tabular grains with high aspect ratio,
If the desalted and redispersed seed crystals were not grown promptly, performance fluctuations would occur, which was a problem in terms of stable production.

As described above, there is no example in which stable production of high silver chloride-containing high aspect ratio tabular grains has been realized by the conventional seed crystal method, and in the simple application of the conventional method, as described above,
There was a situation in which both the fog and the features due to the high aspect ratio were not compatible. The conventional technology has not been able to solve this problem. Further, the conventional technique is insufficient in terms of pressure blackening resistance.

Further, JP-A-3-196136 and JP-A-3-196136.
No. 196137 discloses a technique of forming grains in the presence of an oxidizing agent for silver. Also, JP-A-6-2
50312 describes an example in which this is applied to the preparation of a seed crystal emulsion. The technique of using an oxidizing agent in the system of silver chloride tabular grains is described in European Patent 617320A. However, it was not expected at all that the use of an oxidizing agent in the preparation of a silver chloride flat plate using the seed crystal method would be effective in achieving both a high aspect ratio, low fog, and pressure blackening resistance. That is. The present inventors have found that the use of the seed crystal method and the use of an oxidizing agent at that time are very effective in reducing the fog on the silver chloride flat plate and enhancing the high sensitivity and high aspect ratio. A growth method capable of achieving an extremely high aspect ratio during seed crystal formation, for example, {100} silver chloride flat plate growth at high potential or high pH or {111}
Use large amount of crystal wall control agent on silver chloride flat plate and high potential,
High pH growth etc. causes the generation of a large amount of fogged silver nuclei. However, once passing through the desalting and washing steps, most of the silver nuclei formed disappear and the fog is reduced. Further, if an oxidizing agent is used in combination, the fog nuclei can be completely removed. When this seed crystal is used, the subsequent growth makes it possible to obtain an emulsion having a high aspect ratio with a lower potential, a lower pH, and a smaller amount of crystal wall controlling agent, and it is possible to significantly reduce fog nuclei. On the other hand, when the seed crystal is not used, a large amount of oxidizer has to be used in order to reduce the fodder nuclei on the way. However, this not only causes deformation of the grains, but also causes desensitization of the emulsion and deterioration of storage stability due to the effect of the oxidizing agent remaining after desalting and washing with water, so that desired performance cannot be obtained. Further, low molecular weight gelatin, synthetic protective colloid, phthalated gelatin, low methionine gelatin (oxidized gelatin), etc., which are advantageous for increasing the aspect ratio at the time of seed crystal formation, can be positively used. These protective colloids are convenient for increasing the aspect ratio, but when they remain as protective colloids, they adversely affect chemical sensitization and spectral sensitization, resulting in increased fog and reduced sensitization and deterioration of storage stability and pressure of the photosensitive material. Causes a reduction in blackening resistance. The present invention thus solves the conventional problems.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique for stably preparing tabular grains having a high aspect ratio and high silver chloride content. Furthermore, it is to provide tabular grains having a high silver chloride content, which have high sensitivity, low fog, and high resistance to pressure blackening, and a photographic light-sensitive material made of them provides rapid processing, low pollution processing, and low replenishment in photographic light-sensitive materials. It is an object of the present invention to achieve low waste liquid treatment.

[0010]

The above object of the present invention is achieved by the following items (1) to (4). (1) A silver halide photographic light-sensitive material having at least one emulsion layer, characterized in that at least one of the emulsion layers is an emulsion (1) having the following characteristics. Photographic material. After tabular silver halide grains having an aspect ratio of 2 or more occupy 50 to 100% of the projected area of all silver halide grains, the silver halide emulsion (2) is desalted, and then the emulsion (2) is seed crystal emulsion. A tabular silver halide grain having an aspect ratio of 2 or more, which accounts for 50 to 100% of the projected area of all silver halide grains and has a silver chloride content of 20% or more ( 1). (2) The silver halide photographic light-sensitive material according to (1), wherein an oxidizing agent for silver is added when the emulsion (2) is prepared. (3) The protective colloid used for forming the seed crystal emulsion (2) and the protective colloid used for growing the emulsion (1) after demineralized water washing are different in type (1) and (2) Silver halide photographic light-sensitive material. (4) The main planes of the tabular grains of emulsions (1) and (2) are
The silver halide photographic light-sensitive material of (1) to (3), which has a {100} plane.

The steps for producing the silver halide emulsion in the present invention include the steps of preparing seed crystal grains (seed crystal emulsion, the above emulsion (2)) and the step of growing seed crystal grains (preparation of emulsion (1)). ). Here, the step of preparing seed crystal particles includes a step of forming particles including nucleation, ripening and growth, followed by a step of washing with demineralized water and optionally a step of refrigerating or freezing. Further, the step including the growth of seed crystal grains is a step of preparing the emulsion (1), and the steps of further growing the grains in the presence of the seed crystal grains, the steps of desalination and chemical sensitization. Consists of.

(111) of the seed crystal emulsion (2) of the present invention
For nucleation of emulsions whose principal plane is the plane, see Japanese Patent Publication No.
-8326, 64-8325, 64-8324
No. 2, JP-A 1-250943, Japanese Patent Publication No. 3-14328
No. 4, JP-B 4-81782, JP-B 5-40298
No. 5,39,459, No. 5-12696, and JP-A Nos. 63-213836, 63-218938 and 6
No. 3-281149, JP-A-62-218959, and the like, and as a prior art of tabular grains having a (100) plane as a main plane, JP-A-5-204 is known.
073, JP-A-51-88017, JP-A-63-2
No. 4238 and Japanese Patent Application No. 5-264059. In the seed crystal emulsion (2) of the present invention, the nucleation method described in these prior arts can be optionally used.

During the nucleation in the preparation of the seed crystal emulsion (2),
Conventionally known AgX is used as a dispersion medium during aging and growth.
Although a dispersion medium for emulsions can be used, gelatin having a methionine content of preferably 0 to 50 μmol / g, more preferably 0 to 30 μmol / g can be preferably used. The oxidizing agent for silver used in the method for preparing a seed crystal emulsion of the present invention refers to a compound that acts on metallic silver to convert it into silver ions. In particular, a compound capable of converting extremely fine silver atoms by-produced in the process of forming silver halide grains into silver ions is effective. The silver ions generated here may form a poorly soluble silver salt such as silver halide, silver sulfide or silver selenide, or may form a readily soluble silver salt such as silver nitrate. May be. The oxidizing agent for silver may be an inorganic substance or an organic substance.

As the inorganic oxidant, for example, ozone,
Hydrogen peroxide and its adducts (eg NaBO_Two・ H
_TwoO_Two・ 3H_TwoO, 2NaCO_Three・ 3H_TwoO_Two, Na_Four
P_TwoO₇・ 2H_TwoO_Two2Na_TwoSO_Four・ H_TwoO_Two・ 2
H_TwoO), peroxyacid salts (eg K_TwoS_TwoO₈, K
_TwoC_TwoO₆, K_TwoP_TwoO₈), Peroxy complex compounds
(For example, K_Two[Ti (O_Two) C_TwoO_Four] 3H_TwoO,
4K_TwoSO_Four・ Ti (O _Two) OH ・ SO_Four・ 2H_TwoO,
Na_Three[VO (O_Two) (C_TwoH_Four)_Two・ 6H_TwoO), over
Manganese salts (eg KMnO_Four), Chromate (eg
For example, K_TwoCr_TwoO₇) Oxygenates, iodide and bromine
Halogen elements such as, perhalogenates (eg, periodate)
Potassium arsenate) High valent metal salt (eg
Anoferric acid potassium) and thiosulfonate
I can do it. Further, as an organic oxidant, p-quinone, etc.
Quinones, organic peroxides such as peracetic acid and perbenzoic acid,
Compounds that release active halogens (eg, N-bromsa
Cucinimide, chloramine T, chloramine B), disul
Fido compounds are mentioned as examples. Preferred of the present invention
Oxidants include ozone, hydrogen peroxide and its adducts, halogen
Element, thiosulfonate inorganic oxidant, and quinone
, An organic oxidant for disulfide compounds. Better
Preferred oxidizing agents are thiosulfonate and disulfide.
Compounds and hydrogen peroxide water.

In the method of preparing a seed crystal emulsion of the present invention, at least one of the oxidizing agents for silver is added during the preparation process. Here, “during the preparation step” basically means that any step may be performed. Particularly preferred is the method of adding during grain formation. Further, a method of adding to the desalted water washing step is also preferable. It may be added to the reaction vessel in advance, but it is more preferable to add it at an appropriate time during particle formation. Alternatively, the water-soluble silver salt or the water-soluble alkali halide may be added with an oxidizing agent for silver in advance, and these aqueous solutions may be used to form particles. In addition, it is also preferable to add it in several times with the formation of particles or continuously add it for a long time. The oxidizing agent additive for silver is 10 ^-7 to 1 per mol of silver halide.
0 ^-1 mol is preferable, 10 ^-6 to 10 ^-2 mol is more preferable, and 10 ^-5 to 10 ^-3 mol is most preferable.

In order to add the oxidizing agent for silver during the step of preparing the seed crystal emulsion, a method usually used for adding an additive to a photographic emulsion can be applied. Specifically, the water-soluble compound is an aqueous solution having a suitable concentration, and the water-insoluble or sparingly-soluble compound is a suitable organic solvent miscible with water, for example, alcohols, glycols, ketones, esters, Among the amides, they can be dissolved in a solvent that does not adversely affect the photographic characteristics and added as a solution.

In the present invention, the protective colloid at the time of forming a seed crystal and the protective colloid at the time of growing the seed crystal to obtain finished particles are different from each other, for example, as follows. (1) Seed crystal particles Low methionine gelatin Complete particles Deionized gelatin (2) Seed crystal particles Phthalated gelatin Complete particles High molecular weight gelatin (3) Seed crystal particles Polyvinyl alcohol Complete particles Acid-treated gelatin (4) Seed crystal particles Low molecular weight gelatin (Average molecular weight 10,000) Complete particles High molecular weight gelatin (Average molecular weight 70,000) (5) Seed crystal particles Gelatin from fish skin living in the cold sea Complete particles Lime-processed gelatin

The tabular seed crystal emulsion prepared in the present invention (2)
Is a tabular grain having an aspect ratio (circular equivalent diameter of silver halide grain / grain thickness) of 2.0 or more, preferably 2.0 or more and 15.0 or less, and particularly preferably 3.0 or more and 12.0 or less. An emulsion in which the grains are present in an amount of 50% or more, preferably 70% or more, and particularly preferably 85% or more of the projected area of all silver halide grains in the emulsion. The mean spherical equivalent diameter of the tabular seed crystal grains is preferably 0.6 μm or less, and is 0.15 μm or more and 0.5 μm or more.
The following is particularly preferable, and the average grain thickness of the tabular seed crystal grains is preferably 0.3 μm or less, and 0.25 μm or less 0.0
5 μm or more is particularly preferable. The tabular seed crystal grains may be any of silver bromide, silver iodobromide, silver chloride, silver chlorobromide, silver iodochlorobromide and silver iodochloride.

The tabular seed crystal grains of the present invention may have at least two layered structures having substantially different halogen compositions, or may have a uniform composition. The particles having a layered structure with different halogen compositions may be those containing a high bromine layer in the core part, a low bromine layer in the outermost layer, or a low bromine layer in the core part and a high bromine layer in the outermost layer. Good. The particle size distribution may be narrow or wide, but it is preferable that the coefficient of variation of the circle equivalent diameter of the projected area is 5% or more and 30% or less.

A method for preparing the tabular seed crystal grains (seed crystal emulsion) of the present invention will be described. The present invention has a step of forming tabular core grains by simultaneously mixing a water-soluble silver salt and a halide salt aqueous solution in a reaction vessel containing an aqueous gelatin solution and further aging. The conditions for forming the flat plate nuclei preferable in the present invention are as follows.

1) The gelatin concentration is 0.8 to 20.
wt%, preferably 1.0 to 15 wt%,
More preferably, 1.0 to 6 wt% is effective, and as the gelatin species used, ordinary photographic gelatin is preferable. However, at temperatures below 35 ° C, high concentrations (1.6
(~ 20 wt%) gelatin solution is difficult to use because it is set. At such temperatures, especially low molecular weight gelatin (molecular weight 2000 to 100,000), modified gelatin such as phthalated gelatin, and gelatin that is difficult to set such as gelatin taken from the skin of fish in the cold sea can be used. preferable. Furthermore, low methionine gelatin and phthalated gelatin can also be preferably used.

2) As an addition amount mixing device for improving stirring, US Pat. No. 3,785,777 (197)
4) and German Patent Applicat
Ion (OLS) No. 2,556,888, a device for adding and mixing the reaction liquid in the liquid is preferable.

3) The addition rate of silver salt and halide salt is 6 × 10 per 1 liter of gelatin aqueous solution.
^-4 mol / min to 2.9 × 10 ^-1 mol / min.

4) Ordinary photographic gelatin is used as the gelatin to be added to the silver salt or halide salt aqueous solution to be added, but the concentration can be added within a range where the aqueous solutions are not set, and usually 0.05 to 1 .6 wt%
It is. However, if a heating device for those liquids is attached,
Higher concentrations (about 20 wt%) can be added. Further, in this case, gelatin such as low-molecular weight gelatin (molecular weight 2000 to 100,000) or modified gelatin is difficult to set as the gelatin seed, and thus it is particularly preferable. When gelatin is added to this silver salt or halide salt aqueous solution, if the gelatin species, concentration and temperature are made to be the same as the gelatin species, concentration and temperature in the reaction vessel, these supersaturation factors are kept uniform near the addition port. Sagging and more uniform nucleation are possible, which is more preferable.

5) The Cl ^- concentration in the reaction solution is p
Cl can be set to 0.5 to 3.5. 6) As the irrelevant salt concentration in the reaction solution, 1.0 × 10 ^-2
˜1 mol / liter, more preferably 1 × 10 ⁻¹ to 1
It can be set in the region of mol / liter.

A silver halide solvent is useful for promoting the ripening of silver halide grains. For example, it is known to have an excess of halogen ions in the reactor to promote ripening. Therefore, it is clear that ripening can be promoted only by introducing an aqueous halide solution into the reactor. Also, other ripening agents can be used.
The total amount of these ripening agents can be added to the dispersion medium in the reactor before adding the silver salt and the halide salt, and one or more halide salts, silver salts or peptizers can be added. It is also possible to add the agent and introduce it into the reactor. The ripening agent can also be introduced independently at the stage of halide and silver salt addition.

As the ripening agents other than the halogen ions, ammonia, amine compounds, thiocyanate salts such as alkali metal thiocyanate salts, especially sodium and potassium thiocyanate salts, and ammonium thiocyanate salts can be used. The use of thiocyanate ripening agents is described, for example, in US Pat.
No. 264, No. 2,448,534 and No. 3,32
No. 0,069. US Patent No. 3,2
Known thioether ripening agents such as those described in Nos. 71,157, 3,574,628, and 3,737,313 can also be used. Alternatively, JP-A-5
It is also possible to use thione compounds as disclosed in 3-82408 and 53-144319.

The tabular seed crystal grains (seed crystal emulsion) of the present invention are
It can be prepared by referring to a known method for preparing a tabular silver halide emulsion. As a method for preparing a silver halide seed crystal emulsion composed of tabular grains, for example, Duffin
(Duffin), "Photographic Emu"
Ision Chemistry ”(Focal Pr
ess, New York 1966) pp. 66-7
Page 2, and A. P. H. Trivelli, W.W. F. Smith edition "Phot.J
pp. 285, pp. 285, pp. 1985, No. 58-113927, and No. 58-11.
It is also possible to refer to the methods described in Nos. 3928 and 58-127921.

In addition to these, for example, Cleeve's Theory and Practice of Photography (Cleve, Photogra.
phy Theory and Practice (1
930)), p. 131; Gatov, Photographic Science and Engineering (Gutof).
f, Photographic Science an
d Engineering), Volume 14, 248-2
57 (1970); U.S. Pat. No. 4,434,226.
Nos. 4,414,310 and 4,433,048
No. 4,439,520, British Patent No. 2,112,
157, Japanese Patent Application Nos. 3-280961 and 3-1122.
The methods described in No. 59 and No. 3-119081 can be referred to.

In the present invention, it is essential that the tabular seed crystal grains be washed with water for desalting and dispersed in a newly prepared protective colloid. The washing temperature can be selected according to the purpose,
It is preferable to select in the range of 5 to 50 ° C. PH at the time of washing
Can also be selected according to the purpose, but it is preferably selected in the range of 2 to 10. More preferably, it is in the range of 3 to 8. The pAg at the time of washing with water can be selected according to the purpose, but is preferably selected in the range of 5 to 10. As a method of washing with water, a noodle washing method, a dialysis method using a semipermeable membrane, a centrifugation method, a coagulation sedimentation method, or an ion exchange method can be selected and used. The coagulation sedimentation method can be selected from, for example, a method using a sulfate, a method using an organic solvent, a method using a water-soluble polymer, and a method using a gelatin derivative.

The seed crystal emulsion prepared as described above may be continuously grown as it is, or may be refrigerated or frozen. The storage temperature is preferably 5 ° C or lower.

The present invention also includes a step of growing the tabular seed crystal grains thus obtained to obtain the emulsion (1).

Next, a process including growth of seed crystal grains prepared as described above will be described.

The step including the growth of seed crystal grains is, for example,
The process further comprises the steps of further growing the particles in the presence of the seed crystal particles described above, washing with demineralized water and chemical sensitization. The amount of seed crystals used at this time is arbitrary, but it is preferable to use seed crystals in an amount corresponding to 1/1 or less of the molar amount of silver salt supplied for growth. , More preferably 1/2 or less, and particularly preferably 1/50 or more and 1/5 or less. Further, any time can be selected from the time when the seed crystal is prepared to the time when it is used for growth, but it is preferable for some reason that it is preferably used for growth after being refrigerated for one day or more.
The growth in the presence of seed crystals can be performed in the same manner as the growth in the preparation of seed crystals described above. In this grain growth process, it is desirable to add a silver and halogen solution so that new crystal nuclei are not generated. The size of the emulsion grains can be adjusted by controlling the temperature, selecting the type and amount of the solvent, and controlling the addition rate of the silver salt and halide used during grain formation. In addition, part or all of silver added in the grain growth process is disclosed in Japanese Patent Laid-Open No.
As described in 2-99751, it can also be supplied as fine particles of silver halide. The same applies to the seed crystal formation process. This method is preferably used in the present invention.

The method of crystal growth of the present invention in the presence of fine silver halide grains (fine grains dissolve and substrate grains grow) will be described below. In the fine grain emulsion addition method, an AgX fine grain emulsion having a diameter of 0.15 μm or less, preferably 0.1 μm or less, more preferably 0.06 to 0.006 μm is added, and the tabular grains are grown by Ostwald ripening. The fine grain emulsion can be added either continuously or continuously. The fine grain emulsion can be continuously prepared by supplying the AgNO ₃ solution and the X ⁻ salt solution by a mixer provided near the reaction vessel, and can be immediately added to the reaction vessel immediately or in another vessel in advance. Can be added continuously or continuously after preparation in a batch system. The fine grain emulsion can be added in a liquid form or as a dry powder.
The dry powder may be mixed with water immediately before addition, liquefied and added. The added fine particles are preferably added in such a manner that they disappear within 20 minutes, more preferably 10 seconds to 10 minutes. If the disappearance time becomes long, ripening occurs between the fine particles and the particle size becomes large, which is not preferable. Therefore, it is preferable not to add the entire amount at once. The fine particles preferably do not substantially contain multiple twin particles. Here, the multiple twin particles refer to particles having two or more twin planes per particle. "Substantially not contained" means that the ratio of the number of multiple twin grains is 5% or less, preferably 1% or less, more preferably 0.1% or less. Further, it is preferable that substantially no single twin particles are contained. Further, it is preferable that the composition does not substantially include a screw dislocation. Here, "substantially not included" complies with the above-mentioned rules.

The halogen composition of the fine particles is AgCl, Ag
Br, AgI and a mixed crystal of two or more of them. For other details, the description in JP-A-6-59360 can be referred to. The total amount of fine grains added is required to be 20% or more of the total amount of silver halide, preferably 40% or more, and more preferably 50% or more and 98% or less.
The Cl content of the fine particles is preferably 10% or more, more preferably 50% or more and 100% or less.

In the present invention, the seed crystal grains (seed crystal emulsion (2))
The tabular silver halide grains (tabular silver halide emulsion (1)) prepared from

The tabular silver halide grains prepared in the present invention may be any of silver chlorobromide, silver iodochlorobromide, silver chloride and silver iodochloride. The finished emulsion (1) of the present invention is, in a silver halide emulsion containing at least a dispersion medium and silver halide grains, 50% or more of the total projected area of the silver halide grains, preferably 60% to 100%, and more preferably Is 70
-100% are particles having an aspect ratio (diameter / thickness) of 2 or more. Furthermore, it is preferable that the average aspect ratio is 2 or more, preferably 3 to 25, and more preferably 4 to 20. The principal plane refers to the maximum outer surface of tabular grains,
Grains having {111} planes and {100} planes are preferably used. In particular, tabular grains having the {100} plane as the main plane are preferred. The thickness of the tabular grains is 0.35 μm or less, preferably 0.05 to 0.3 μm, more preferably 0.05 to 0.3 μm.
0.25 μm is more preferred. The silver chloride content is 20 mol% or more, preferably 25% to 100 mol%, more preferably 30 to 100 mol%, and further preferably 40 to 100%.
Mol%. Here, the diameter refers to the diameter of a circle having an area equal to the projected area of the tabular grains, and the thickness refers to the distance between two principal planes. The aspect ratio is this diameter divided by the thickness. The average aspect ratio is the average of the aspect ratios of all particles. In a grain having a layered structure with different halogen compositions, even an emulsion containing a high iodine layer in the core part and a low iodine layer in the outermost layer, or a grain containing a low iodine layer in the core part and a high iodine layer in the outermost layer Good. further,
The layered structure may be composed of three or more layers, or may be a structure in which the halogen composition continuously changes.

In the preparation of the tabular silver halide emulsion of the present invention, the properties of the silver halide grains can be controlled by allowing various compounds to be present in the silver halide precipitation forming process. Such a compound may be initially present in the reaction vessel, or may be added together with one or more salts according to a conventional method. US Patent Nos. 2,448,060, 2,628,167, 3,737,313, 3,772,031, and Research Disclosure (hereinafter abbreviated as RD), 134 volumes. , June 1975, 13452, and compounds such as compounds of copper, iridium, lead, bismuth, cadmium, zinc (chalcogen compounds such as sulfur, selenium and tellurium), gold and Group VIII noble metals. The properties of the silver halide grains can be controlled by allowing them to exist during the silver halide precipitation formation process.

In the present invention, it is preferable that the silver halide emulsion is subjected to reduction sensitization during grain formation, after grain formation and before chemical sensitization other than reduction sensitization, during chemical sensitization, or after chemical sensitization. Here, reduction sensitization means a method of adding a reduction sensitizer to a silver halide emulsion, a method of growing or aging silver halide grains in an atmosphere of low pAg of pAg1 to 7 called silver ripening, and high pH ripening. It is either a method of growing or aging in a so-called high pH atmosphere of pH 8 to 11. Also, two or more of these methods can be used together. The methods of adding the above-mentioned reduction sensitizers are respectively preferable in that the level of reduction sensitization can be finely adjusted.

Known reduction sensitizers are, for example, stannous salts, ascorbic acid and its derivatives, amines and polyamines, hydrazine derivatives, formamidinesulfinic acid, silane compounds and borane compounds. As the reduction sensitizer used in the present invention, these known reduction sensitizers can be selected and used, or two or more compounds can be used in combination. Preferred compounds as the reduction sensitizer used in the present invention are stannous chloride, thiourea dioxide,
Dimethylamine borane, ascorbic acid and its derivatives. The addition amount of the reduction sensitizer in the present invention needs to be selected depending on the emulsion production conditions, but is suitably in the range of 10 ^-7 to 10 ^-3 mol per mol of silver halide. The reduction sensitizer may be added during the grain growth in a state of being dissolved in a solvent such as water or alcohols, glycols, ketones, esters and amides. Although it can be added to the reaction vessel in advance, a method of adding it at an appropriate time during the growth of silver halide grains is preferable. It is also possible to add a reduction sensitizer to an aqueous solution of a water-soluble silver salt or a water-soluble alkali halide in advance and use these aqueous solutions to precipitate silver halide grains.
In addition to this, it is also a preferable method to add the solution of the reduction sensitizer in several batches as the silver halide grains grow, or to add it continuously for a long time.

In the present invention, for silver halide emulsions,
For example, European Patent Nos. 96,727B1 and 64,41.
2B1 to provide roundness to the particles, or West German Patent 2,306,447C2,
The particle surface may be modified as disclosed in JP-A-60-221320.

In the silver halide emulsion of the present invention, the grain surface generally has a flat structure.
In some cases, it is preferable to intentionally form irregularities. Examples thereof include grains having a part of a crystal, for example, grains having a hole at the apex or the center of the face, as described in JP-A-58-106532 and JP-A-60-221320, or US Pat. Raffle particles described in 4,643,966 can be mentioned.

The emulsion prepared in the present invention may be a so-called polydisperse emulsion having a wide size distribution of silver halide grains or a monodisperse emulsion having a narrow size distribution, depending on the purpose. As a scale for expressing the size distribution of silver halide grains, there is a case where a coefficient of variation of a projected area circle equivalent diameter of a grain or a sphere equivalent diameter of a volume is used. In the case of a monodisperse emulsion, an emulsion having a grain size distribution having a coefficient of variation of 25% or less, more preferably 20% or less, still more preferably 15% or less is preferable.

The tabular silver halide emulsion prepared in the present invention can be subjected to chemical sensitization represented by sulfur sensitization, selenium sensitization and gold sensitization. The place for chemical sensitization is
It depends on the composition, structure, and shape of the emulsion grains and on the intended use of the emulsion. There is a case where a chemical sensitizing nucleus is embedded in the inside of a grain, a case where the chemical sensitizing nucleus is embedded in a position shallow from the grain surface, or a case where a chemical sensitizing nucleus is formed on the surface. The effect of the present invention is effective in any case, but is particularly preferable when a chemical sensitizing nucleus is formed near the surface. That is, the surface latent image type emulsion is more effective than the internal latent image type emulsion.

Chemical sensitization is performed by James (TH Jam
es), The Photographic Process, 4th
Edition, Macmillan, 1977, (TH James)
s, The Theory of the Photo
graphic Process, 4th ed, M
Acmillan, 1977) 67-76, and using active gelatin, or Research Disclosure, 120, 1974.
April, 2008; Research Disclosure,
34, June 1975, 13452, U.S. Pat. No. 2,
642, 361, 3,297,446, 3,7
72,031, ibid 3,857,711, ibid 3,90
1,714, 4,266,018 and 3,9
04,415 and British Patent No. 1,315,755.
, PAg 5-10, pH 5-8 and temperature 30-80 ° C.
It can be performed using gold, platinum, palladium, iridium or a combination of a plurality of these sensitizers.

As the gold sensitizer used in the present invention, a gold complex salt (see, for example, US Pat. No. 2,399,083) is particularly preferable. Of these, potassium chloroaurate, potassium aurithiocyanate, auric trichloride, sodium aurithiosulfate, and 2-aurosulfobenzothiazole methchloride are particularly preferred. The content of the gold sensitizer in the silver halide grain phase is preferably from 10 ^-9 to 10 ^-3 mol, particularly preferably from 10 ^-8 to 10 ^-4 mol, per mol of silver halide.

As the sulfur sensitizer used in the present invention, for example,
Thiosulfates, thioureas, thiazoles, rhodanin
And other compounds (specific examples; US Pat. No. 1,574,
No. 944, No. 2,410,689, No. 2,27
No. 8,947, No. 2,728,668, No. 3,6
56,955, 4,030,928, 4,
067,740), among which
Especially preferred are sulphates, thioureas and rhodines.
is there. The amount of sulfur sensitizer depends on the grain size and the temperature of chemical sensitization.
Choose the optimum amount according to the conditions such as temperature, pAg and pH.
Can be. Specifically, it is 10 per mol of silver halide.
^-7-10^-3Mol, preferably 5 × 10^-7-10^-FourMole,
More preferably 5 × 10^-7-10^-FiveUse moles. C
Regarding the lens sensitizer, JP-A-6-011791, JP
You can refer to the description of Kaihei 5-313382
You. The chemical sensitization temperature is in the range of 30 ° C to 90 ° C, pAg
Is 5 or more and 10 or less, and pH is 4 or more and can be appropriately selected.

In addition, in the present invention, iridium,
Sensitization methods using metals such as platinum, rhodium, and palladium (see, for example, US Pat. Nos. 2,448,060 and 2,56).
No. 6,245, No. 2,566,263), and a tellurium sensitizing method using a tellurium compound can be used together.

It is also possible to carry out chemical sensitization in the presence of a chemical sensitization aid. Here, as the chemical sensitization aid, compounds such as azaindene, azapyridazine, and azapyrimidine that are known to suppress fog and increase sensitivity in the process of chemical sensitization are used. Examples of chemical sensitization aid modifiers include:
U.S. Pat. Nos. 2,131,038 and 3,411,91
4, 3,554,757, JP-A-58-1265.
No. 26, and Duffin, "Photoemulsion Chemistry," 138
~ Page 143.

In the present invention, the silver halide emulsion may be spectrally sensitized with a methine dye or the like. Dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes, and hemioxonol dyes. Particularly useful dyes are
It is a dye belonging to a cyanine dye, a merocyanine dye, and a complex merocyanine dye. Any of the nuclei usually used for cyanine dyes as basic heterocyclic nuclei can be applied to these dyes. For example, pyrroline nucleus, oxazoline nucleus, thiozoline nucleus, pyrrole nucleus, oxazole nucleus, thiazole nucleus, selenazole nucleus, imidazole nucleus,
A tetrazole nucleus, a pyridine nucleus; a nucleus in which an alicyclic hydrocarbon ring is fused to these nuclei; and a nucleus in which an aromatic hydrocarbon ring is fused to these nuclei, for example, an indolenine nucleus, a benzindolenine nucleus, an indole nucleus, Benzoxadol nucleus, naphthoxazole nucleus, benzothiazole nucleus, naphthothiazole nucleus, benzoselenazole nucleus, benzimidazole nucleus, quinoline nucleus can be applied. These nuclei may be substituted on carbon atoms.

In the merocyanine dye or the complex merocyanine dye, as a nucleus having a ketomethylene structure, a pyrazolin-5-one nucleus, a thiohydantoin nucleus, a 2-thiooxazolidine-2,4-dione nucleus, a thiazolidine-
A 5-6 membered heterocyclic nucleus, such as a 2,4-dione nucleus, a rhodanine nucleus, a thiobarbituric acid nucleus, can be applied.

These sensitizing dyes may be used alone or in combination. Combinations of sensitizing dyes are often used, especially for supersensitization. Typical examples thereof are US Pat. Nos. 2,688,545 and 2,972.
7,229, 3,397,060, 3,52
No. 2,052, No. 3,527,641, No. 3,61
7,293, 3,628,964, 3,66
6,480, 3,672,898, 3,67
9,428, 3,703,377 and 3,76
9,301, 3,814,609, 3,83
Nos. 7,862, 4,026,707, British Patent Nos. 1,344,281, 1,507,803, JP-B-43-4936, JP-B-53-12,375, JP-A-52 Nos. -110,618 and 52-109,925. Along with the sensitizing dye, the emulsion may contain a dye which does not itself have a spectral sensitizing effect or a substance which does not substantially absorb visible light and exhibits supersensitization.

The dye may be added to the emulsion at any stage known to be useful in the emulsion preparation. Most commonly, it is performed after completion of chemical sensitization but before coating, but US Pat. No. 3,628,9.
As described in JP-A-58-113,92 and JP-A-58-11392, spectral sensitization can be performed simultaneously with chemical sensitization by adding a chemical sensitizer at the same time as described in JP-A Nos.
It can be carried out prior to chemical sensitization as described in No. 8 or it can be added before the completion of silver halide grain precipitation to initiate spectral sensitization. It is also possible to add these said compounds separately, as taught in U.S. Pat. No. 4,225,666, i.e. to add some of these compounds prior to chemical sensitization and the rest to chemical sensitization. It is also possible to add after sensation and such addition may be done at any time during silver halide grain formation, as taught in US Pat. No. 4,183,756. The addition amount is 4 × 10 ⁻⁶ per mol of silver halide.
It may be up to 8 × 10 ⁻³ mol.

Gelatin is advantageously used as a protective colloid used in the preparation of the silver halide emulsion in the present invention and as a binder for other hydrophilic colloid layers, but other hydrophilic colloids may also be used. You can Examples of the hydrophilic colloid include proteins such as gelatin derivatives, graft polymers of gelatin and other polymers, albumin, casein; cellulose derivatives,
For example, hydroxyethyl cellulose, carboxymethyl cellulose, cellulose sulfates; sugar derivatives, for example, sodium alginate, starch derivatives; various synthetic hydrophilic polymeric substances such as single or copolymers, for example polyvinyl alcohol, polyvinyl alcohol partial acetal, poly -N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole can be used. Examples of the gelatin include lime-processed gelatin, acid-processed gelatin and Bull. Soc. Sci. Photo
o. Japan. No. 16. Enzyme-treated gelatin as described in P30 (1966) may be used.
A hydrolyzate of gelatin or the like can be used.

The silver halide emulsion which can be used in the present invention is
It may be a surface latent image type in which a latent image is mainly formed on the surface, an internal latent image type in which particles are formed, or a type having a latent image both on the surface and inside. Among the internal latent image type emulsions, core / shell type internal latent image type emulsions described in JP-A-63-264740 may be used. A method for preparing this core / shell type internal latent image type emulsion is described in JP-A-59-133542. The thickness of the silver halide grain shell of this emulsion varies depending on the form of development processing, but it is 3 to 40.
nm is preferable, and 5 to 20 nm is particularly preferable. The silver halide emulsion used in the present invention is usually one which has been physically ripened, chemically ripened and spectrally sensitized. The additive used in such a process is R.I. D. No. 1764
3, No. 18716 and No. 307105. The relevant parts are summarized in the table below.

In the light-sensitive material of the present invention, as described above, the grain size, grain size distribution of the light-sensitive silver halide emulsion,
Two or more kinds of emulsions having different characteristics of at least one of halogen composition, grain shape, and sensitivity can be mixed and used in the same layer. The coated silver amount of the light-sensitive material of the present invention is
It is preferably 6.0 g / m ² or less, and most preferably 4.5 g / m ² or less.

Known photographic additives that can be used in the present invention are also those described in the above three R.S. D. , And the relevant locations are shown in the table below. Types of additives RD17643 RD18716 RD307105 1. Chemical sensitizer Page 23 Page 648 Right column Page 866 2. Sensitivity enhancer Page 648, right column 3. Spectral sensitizer, pages 23 to 24, page 648, right column to pages 866 to 868, supersensitizer, page 649, right column 4. Whitening agent Page 24 Page 647 Right column Page 868 5. Antifoggant page 24 to 25 page 649 right column 868 to 870 page stabilizer 6. Light absorber, pages 25 to 26, page 649, right column to page 873, filter dye, page 650, left column, ultraviolet absorber 7. Anti-stain agent page 25 right column page 650 left column to page 872 right column 8. Dye image stabilizer page 25 page 650 page left column page 872 9. Hardener page 26 page 651 left column 874 to 875 page 10.Binder page 26 page 651 left column 873 to 874 page 11.Plasticizer and lubricant page 27 650 page right column 876 page 12. Coating aid, 26 to 27 Page 650 page right column 875-876 page surfactant 13. antistatic agent page 27 page 650 right column 876-877 page 14. matting agent page 878-879

The light-sensitive material of the present invention includes US Pat.
40,454, 4,788,132, JP-A-6
It is preferable to incorporate the mercapto compounds described in JP-A No. 2-18539 and JP-A No. 1-283551. In the light-sensitive material of the present invention, dyes dispersed by the method described in International Publication WO88 / 04794 and Japanese Patent Publication No. 1-502912, or EP317,308A and US Pat.
It is preferable to incorporate the dyes described in JP-A No. 20,555 and JP-A No. 1-259358.

In the light-sensitive material of the present invention, for example, phenethyl alcohol, JP-A-63-257747 and JP-A-62-257747 are used.
-272248, and 1,2-benzisothiazolin-3-one, n-butyl-p-hydroxybenzoate, phenol, 4-described in JP-A No. 1-80941.
It is preferable to add various preservatives or antifungal agents such as chloro-3,5-dimethylphenol, 2-phenoxyethanol, and 2- (4-thiazolyl) benzimidazole.

As a method of forming an image using the light-sensitive material of the present invention, a method of forming an image in combination with a phosphor having a main peak at 400 nm or less can be used. Further, a method of forming an image by combining with a phosphor having a main peak at 380 nm or less is preferable. A screen having a main emission peak at 400 nm or less is disclosed in JP-A-6-11804.
No., WO93 / 01521, and the like, but not limited thereto.

The replenishment amount of the processing solution is preferably 10 cc / 4 cuts or less, more preferably 5 cc / 4 cuts or less, and the effect is greatly exhibited. For the developer of the present invention, a developer containing ascorbic acid or a derivative thereof as a developing agent can be preferably used. These are disclosed in JP-A-5-165.
No. 161, the compound represented by formula (I) and the compound examples I-1 to I-8 and II-9 to II- described therein.
12 is particularly preferred. Ascorbic acids used in these developers are endiol-type (Endiol), enaminol-type (Enaminol), enediamine-type (Endiamin), thiol-enol-type (Thiol-Enol) and enamine-thiol-type (Enamin-Thiol) compounds. Is commonly known as. Examples of these compounds are described in U.S. Pat. No. 2,688,5.
49 and JP-A-62-237443. Methods for synthesizing these ascorbic acids are also well known, and are described in, for example, Tsujio Nomura and Hirohisa Omura, "The Chemistry of Reductones" (Uchida Lao Tsukuba Shinsha 1969). The ascorbic acids used in the present invention can be used in the form of an alkali metal salt such as a lithium salt, a sodium salt and a potassium salt. These ascorbic acids are used in an amount of 1 to 100 g, preferably 5 to 80 g per liter of the developer.
It is preferable to use g.

In the present invention, it is particularly preferred to use 1-phenyl-3-pyrazolidones or p-aminophenols together with ascorbic acid. 3 used in the present invention
1-phenyl-3 as a pyrazolidone-based developing agent
-Pyrazolidone, 1-phenyl-4,4-dimethyl-3
-Pyrazolidone, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone, 1-phenyl-4,
4-dihydroxymethyl-3-pyrazolidone, 1-phenyl-5-methyl-3-pyrazolidone, 1-p-aminophenyl-4,4-dimethyl-3-pyrazolidone, 1-
p-tolyl-4,4-dimethyl-3-pyrazolidone, 1
-P-tolyl-4-methyl-4-hydroxymethyl-3
-Such as pyrazolidone. Developing agent is usually 0.001
It is preferably used in an amount of mol / liter to 1.2 mol / liter. Examples of the p-aminophenol-based developing agent used in the present invention include N-methyl-p-aminophenol, p-aminophenol, N- (β-hydroxyethyl) -p-aminophenol, and N- (4-hydroxyphenyl). There are glycine, 2-methyl-p-aminophenol, p-benzylaminophenol and the like, among which N-methyl-p-aminophenol is preferable.

Alkaline agents used to set the pH include sodium hydroxide, potassium hydroxide, sodium carbonate,
It contains pH adjusters such as potassium carbonate, tribasic sodium phosphate and tribasic potassium phosphate. Examples of the sulfite preservative used in the developer of the present invention include sodium sulfite, potassium sulfite, lithium sulfite, ammonium sulfite, sodium bisulfite, and potassium metabisulfite. The sulfite is preferably at least 0.01 mol / l, particularly preferably at least 0.02 mol / l. Further, the upper limit is preferably up to 2.5 mol / liter. Besides this, LFA. 22 Mason "Photographic Processing Chemistry", published by Focal Press (1966).
6 to 229, U.S. Pat. Nos. 2,193,015 and 2,592,364 and JP-A-48-64933 may be used.

In general, a boric acid compound (for example, boric acid, borax) is often used as a pH buffering agent in the developing solution, but the boric acid compound is used in the ascorbic acid-containing developing solution of the present invention. It is preferable not to contain substantially.

The method of preparing the treating agent used in the present invention is described in JP-A-61-177132 and JP-A-3-134666.
And JP-A-3-67258. As the method of replenishing the developing solution as the processing method of the present invention, the method described in Japanese Patent Application No. 54131/1992 can be used. When performing dry to dry development processing for 100 seconds or less, a roller made of a rubber material as described in JP-A-63-151943 is used to prevent development unevenness peculiar to rapid processing. It is applied to a roller, and as described in JP-A-63-151944, the discharge flow rate for stirring the developing solution in the developing solution tank is set to 10 m / min or more. As described in JP-A-63-264758, it is more preferable to stir more strongly than during standby at least during the development processing.

The light-sensitive material of the present invention can be applied to various light-sensitive materials. Typical examples thereof include color negative films for general use or movies, color reversal films for slides or televisions, color papers, color positive films and color reversal papers. Particularly preferably, general black and white light-sensitive materials are mainly used. In particular, it is used for photographic materials for laser light sources, printing sensitive materials, medical direct photographing X-ray sensitive materials, medical indirect photographing X-ray sensitive materials, CRT image recording sensitive materials, microfilm, general photographing sensitive materials and the like. be able to. Hereinafter, the present invention will be described specifically with reference to examples.

[0068]

【Example】

Example 1 Preparation of {100} AgCl tabular emulsion Comparative Emulsion A 1582 ml of gelatin aqueous solution (gelatin-1) in a reaction vessel.
(19.5 g of deionized alkali-treated bone gelatin having a methionine content of about 40 μmol / g), 1N HNO ₃ solution 7.
8 ml, pH 4.3), NaCl-1 solution (100 ml
13 ml of NaCl (containing 10 g of NaCl therein),
While maintaining the temperature at 0 ° C., the Ag-1 solution (AgNO
₃ containing 20 g) and X-1 solution (NaCl in 100 ml)
(Including 7.05 g) was simultaneously mixed and added at 62.4 ml / min in 15.6 ml portions. After stirring for 3 minutes, the Ag-2 solution (1
100 ml of AgNO _{3 in} 2 ml) and X-2 solution (100
(containing 1.4 g of KBr in ml) at 80.6 ml / min.
8.2 ml was mixed simultaneously. After stirring for 3 minutes, Ag-
Solution 1 and solution X-1 were simultaneously mixed and added at a rate of 62.4 ml / min in 46.8 ml portions. After stirring for 2 minutes, aqueous gelatin solution 20
3 ml (oxidized gelatin-11.3 g, NaCl 1.
3 g, containing a 1N NaOH solution to adjust the pH to 5.5), and the pCl was adjusted to 1.8.
The temperature was raised to 10 minutes and aging was performed for 10 minutes. Thereafter, the disulfide compound A was added in an amount of 1 × 10 ⁻⁴ mol per mol of silver halide, and AgCl fine grain emulsion (average grain diameter 0.1 μm) was added.
m) was added for 20 minutes at an addition rate of 2.68 × 10 ⁻² mol / min AgCl. After aging for 10 minutes after the addition, a precipitant was added, the temperature was lowered to 35 ° C., and the precipitate was washed by settling. An aqueous gelatin solution was added, and the pH was adjusted to 6.0 at 60 ° C.

[0069]

Embedded image

A transmission electron microscope photographic image (hereinafter referred to as TEM) of the replica of the particles was observed. The emulsion obtained is
High silver chloride {100} tabular grains containing 0.44 mol% of AgBr based on silver. The shape characteristic values of the particles were as follows. (Total projected area of tabular grains having an aspect ratio larger than 1 / sum of projected areas of all AgX grains) × 100 = a ₁ = 90% (average aspect ratio (average diameter / average thickness) of tabular grains) = a ₂ = 7.8 (average diameter of the tabular grains) = a ₃ = 1.67 .mu.m (average thickness) = a ₄ = 0.214μm

Inventive Emulsion B In the same manner as in the formation of grains of Comparative Emulsion A, the procedure was exactly the same, except that grain growth was carried out for 5 minutes, growth was stopped, ripening was carried out for 5 minutes, the temperature was lowered, desalting and washing were carried out, An aqueous gelatin solution was added and redispersed at 50 ° C. Using this emulsion, a solution prepared by adding an appropriate amount of deionized gelatin to warm water at 75 ° C and a seed crystal emulsion were dissolved to prepare AgCl used for preparing a comparative emulsion.
The fine grain emulsion was added at an addition rate of 2.68 × 10 ^-2 mol / min to 1
After adding for 5 minutes, the emulsion was washed with demineralized water in the same manner as the comparative emulsion, redispersed to the same gelatin concentration, and the pH was adjusted to 60 at 60 ° C.
0 emulsion was prepared. When the shape characteristics of this emulsion were examined in the same manner, it was found that a ₁ = 95% a ₂ = 10.0 a ₃ = 1.80 μm a ₄ = 0.18 μm.

Preparation of (111) AgCl Tabular Emulsion Comparative Emulsion C Silver chloride tabular grains were prepared as follows. Solution (1) Inert gelatin 30 g Crystal habit control agent A 0.6 g Crystal habit control agent B 0.4 g

[0073]

Embedded image

NaCl 4g H ₂ O 1750cc solution (2) AgNO ₃ 7.6g H ₂ O added 30cc solution (3) NaCl 2.8g H ₂ O added 30cc solution (4) AgNO ₃ 24.5g H ₂ O was added and 96 cc solution (5) NaCl 0.3 g H ₂ O was added and 65 cc solution (6) AgNO ₃ 101.9 g H ₂ O was added and 400 cc solution (7) NaCl 37.6 g H ₂ O was added. 400cc

Solution (2) and solution (3) were simultaneously added to solution (1) kept at 35 ° C. with stirring at a constant addition rate over 1 minute, and the temperature of the solution was raised to 70 ° C. over 15 minutes. Let At this point, grains corresponding to about 5.7% of the total silver were formed. At this point, a hydrogen peroxide solution corresponding to 10 ⁻⁵ mol with respect to the finally added silver nitrate was added, and then the solution (4) and the solution (5) were simultaneously added at a constant addition rate over 24 minutes. Further, the solution (6) solution and the solution (7) were grown over 40 minutes by the control double jet method while keeping the addition rate of the silver nitrate solution constant so that pCl was 1.0, and a silver chloride tabular emulsion was obtained. Was given. The emulsion was washed with water and desalted by the precipitation method, and then 30 g of gelatin and H ₂ O were added.
Was further added, and 2.0 g of phenoxyethanol and 0.8 g of sodium polystyrene sulfonate as a thickening agent were added, and the mixture was redispersed with caustic soda to a pH of 6.0. The emulsion thus obtained has a ₁ = 90% and a ₃ =
It is a silver chloride tabular emulsion having a (111) plane as the main plane with 1.55 μm, a ₄ = 0.18 μm, a ₂ = 8.6, and a coefficient of variation of projected area diameter corresponding to circle of 19%.

Inventive Emulsion D When the comparative emulsion C was prepared, the addition of the solutions (4) and (5) to 1
When the amount was added up to / 3, grain growth was stopped, the temperature was lowered to 35 ° C., desalting and washing were performed, and an aqueous gelatin solution was added and redispersed. This emulsion was stored in a refrigerator at 5 ° C for 2 days, then water and deionized gelatin were added, and the temperature was raised to 70 ° C to uniformly mix and dissolve them, and the same solution (6) and solution (7) as the comparative emulsion were control doubled. Emulsion C was added and grown by the jet method.
Desalting, washing with water and redispersion were carried out in the same manner as in. The shape characteristic values of this emulsion were as follows. a ₁ = 94% a ₂ = 9.8 a ₃ = 1.764 μm a ₄ = 0.18 μm

Preparation of {100} AgBrCl Tabular Emulsion Comparative Emulsion E 1582 ml of gelatin aqueous solution (gelatin-1) was added to a reaction vessel.
(19.5 g of deionized alkali-treated bone gelatin having a methionine content of about 40 μmol / g), 1N HNO ₃ solution 7.
8 ml, pH 4.3), NaCl-1 solution (100 ml
13 ml of NaCl (containing 10 g of NaCl therein),
While maintaining the temperature at 0 ° C., the Ag-1 solution (AgNO
₃ containing 20 g) and X-1 solution (NaCl in 100 ml)
(Including 7.05 g) was simultaneously mixed and added at 62.4 ml / min in 15.6 ml portions. After stirring for 3 minutes, the Ag-2 solution (1
100 ml of AgNO _{3 in} 2 ml) and X-2 solution (100
(containing 1.4 g of KBr in ml) at 80.6 ml / min.
8.2 ml was mixed simultaneously. After stirring for 3 minutes, Ag-
Solution 1 and solution X-1 were simultaneously mixed and added at a rate of 62.4 ml / min in 46.8 ml portions. After stirring for 2 minutes, aqueous gelatin solution 20
3 ml (gelatin-113 g, NaCl 1.3 g, thiosulfonic acid compound-1 to 1 x 1 with respect to total AgNO ₃₎
0 ^-4 mol was added and Na was added to adjust the pH to 5.5.
OH1N solution is included) to adjust pCl to 1.8,
The temperature was raised to 75 ° C., the pCl was adjusted to 1.8, and the mixture was aged for 10 minutes. Then, Ag-3 solution (AgN in 100 ml)
O ₃ 25 g) X-3 solution (KBr 8.55 g in 100 ml)
NaCl 4.21 g) was added at an addition rate of the Ag-3 solution at 18.22 cc / min, and growth was carried out for 20 minutes by the control double jet method so as to keep pCl at 1.8. After aging for 30 minutes after the addition, a precipitating agent was added, the temperature was lowered to 35 ° C., and the precipitate was washed with water. An aqueous gelatin solution was added, and the pH was adjusted to 6.0 at 60 ° C. Transmission electron micrograph image of a replica of the particles (hereinafter referred to as TEM)
Was observed. The resulting emulsion was AgBr based on silver.
It was a high silver chloride {100} tabular grain containing 50 mol% of. The shape characteristic values of the particles were as follows. (Total projected area of tabular grains having an aspect ratio larger than 1 / sum of projected areas of all AgX grains) × 100 = a ₁ = 90% (average aspect ratio (average diameter / average thickness) of tabular grains) = a ₂ = 9.3 (average diameter of the tabular grains) = a ₃ = 1.67 .mu.m (average thickness) = a ₄ = 0.18 .mu.m

[0078]

Embedded image

Inventive Emulsion F Addition of Ag-3 solution and X-3 solution in the growth of the comparative emulsion was completed in 5 minutes, followed by ripening for 10 minutes, desalting and washing, and addition of an aqueous gelatin solution for dispersion. did. The seed crystal emulsion thus prepared was stored in a refrigerator at 2 ° C. for 1 day and then redispersed in an aqueous solution of high molecular weight gelatin having an average molecular weight of 70,000 or more. The solution was grown for 15 minutes. After that, it is desalted and washed with water, then redispersed in an aqueous gelatin solution and pH adjusted to 60 ° C with NaOH
Adjusted to 6.0. The characteristic values of the emulsion were as follows. a ₁ = 93% a ₂ = 9.8 a ₃ = 1.765 μm a ₄ = 0.18 μm

Preparation of {111} AgBrCl Tabular Emulsion Comparative Emulsion G Silver chloride tabular grains were prepared as follows. Solution (1) Inert gelatin 30 g Crystal habit control agent A 0.6 g Crystal habit control agent B 0.4 g

[0081]

Embedded image

NaCl 4g H ₂ O 1750cc solution (2) AgNO ₃ 7.6g H ₂ O added 30cc solution (3) NaCl 2.8g H ₂ O added 30cc solution (4) AgNO ₃ 24.5g H ₂ O were added 96cc solution (5) NaCl 0.3 g H ₂ O was added 65cc solution (6) 400 cc solution (7) was added _{AgNO 3 101.9g H 2 O NaCl 14.2g} KBr 45.6g H 400cc with ₂ O added

Solution (2) and solution (3) were simultaneously added to solution (1) kept at 35 ° C. with stirring at a constant addition rate over 1 minute, and the temperature of the solution was raised to 70 ° C. over 15 minutes. Let At this point, grains corresponding to about 5.7% of the total silver were formed. Here, 1 × 10 ⁻⁴ mol of disulfide compound-B was added to 1 mol of silver halide, and then solution (4) and solution (5) were simultaneously added at a constant addition rate over 24 minutes. Solution (6) 40 and solution (7)
The addition rate of the silver nitrate solution was kept constant so that the pCl was 1.2 over a period of time, and growth was carried out by the control double jet method to obtain a silver chloride tabular emulsion. The emulsion was washed with water and desalted by a precipitation method, 30 g of gelatin and H ₂ O were added, 2.0 g of phenoxyethanol and 0.8 g of sodium polystyrene sulfonate as a thickener were added, and the pH was adjusted to 6.0 with caustic soda. Redistributed.
The emulsion thus obtained had a ₁ = 90% and a ₃ = 1.5.
It is a silver chlorobromide tabular emulsion having a major plane of {111} plane of 5 μm, a ₄ = 0.18 μm, a ₂ = 8.6, and variation coefficient of projected area diameter corresponding to circle of 19%.

[0084]

Embedded image

Inventive Emulsion H In the preparation of Comparative Emulsion G, Ag-
Growth was stopped by addition of the 3rd solution and the X-3 solution in 5 minutes to prepare a seed crystal emulsion. Thereafter, this seed crystal emulsion was used to carry out the same growth, desalting, washing with water and dispersion as in the case of Emulsion D to obtain grown particles. The emulsion thus obtained was a silver chlorobromide tabular emulsion with the {111} plane as the main plane, and its shape characteristics were: a ₁ = 88% a ₂ = 8.9 a ₃ = 1.52 μm a ₄ = 0 It was 0.17 μm. In the preparation of tabular grain B, pCl was adjusted to 2.
While maintaining the ratio to 1, make the potassium bromide solution a mixed solution of potassium bromide and potassium chloride when growing by the control double jet method so that the grain shape such as aspect ratio and grain size becomes almost the same as that of the tabular grain B. Then, silver chlorobromide tabular emulsions I and J having {100} faces as the main planes having silver chloride contents of 17% and 24% were prepared. The other conditions were the same as those for producing the tabular grains B.

(Preparation of Pure Silver Bromide Tabular Grain Emulsion K) Water 1
7 g of potassium bromide in 1 liter, with an average molecular weight of 15,000
In a container that was added with 8 g of low molecular weight gelatin and kept at 55 ° C
While stirring, 36cc of silver nitrate aqueous solution (silver nitrate 4.00
38 g of an aqueous solution containing g) and 5.9 g of potassium bromide
It was added in 37 seconds by the Rouget method. Next gelatin
Solution containing 18.6 g of silver nitrate
While adding 89cc (9.8g of silver nitrate) over 22 minutes
The temperature was raised to 68 ° C. Here, 25% aqueous ammonia solution 7
cc was added and physically aged for 10 minutes at the same temperature.
Then, the disulfide compound A was added to the total silver amount 3 × 10.^-FiveMo
And then add 6.5 cc of 100% nitric acid solution.
Was. Subsequently, an aqueous solution of 153 g of silver nitrate and potassium bromide
Control solution while maintaining pAg 8.5
It was added by the jet method over 35 minutes. At this time
The flow rate at the end of addition is 14 times the flow rate at the start of addition
It accelerated to become. After completion of the addition, 2N thiocyanate
35 cc of the lidium solution was added. At the same temperature for 5 minutes
After physical aging, the temperature was lowered to 35 ° C. Thus a₁
= 90%, a_Three= 1.30 μm, a _Four= 0.170μ
m, a_Two= 7.6 monodisperse pure with a variation coefficient of 18.5%
Tabular grains of silver bromide were obtained. After this, the coagulation sedimentation method can be used.
The soluble salts were removed. Reheat to 40 ° C and gelatin 3
5g, phenoxyethanol 2.35g and thickener
Sodium polystyrene sulfonate 0.8g
PH with caustic soda, potassium bromide and silver nitrate solution
It was adjusted to 5.90 and pAg 8.00.

Preparation of Emulsion L Exactly the same as Emulsion K, except that the growth of 35 minutes by the control double jet method was stopped in 20 minutes.
It was washed with desalted water, an aqueous gelatin solution was added and dispersed to prepare a seed crystal emulsion. After using this emulsion for 1 day in a refrigerator at 5 ° C, it was again dissolved in a gelatin aqueous solution and subjected to growth for 15 minutes under the same conditions as the growth of emulsion K by a control double jet method with accelerated flow rate to obtain finished particles. Obtained. Thereafter, desalting, washing with water and redispersion were carried out in the same manner as in Emulsion K. The shape characteristic values of the obtained emulsion were the same as those of emulsion K in the range of measurement accuracy.

Chemical Sensitization The particles prepared as described above were subjected to chemical sensitization while being kept at 60 ° C. with stirring. First, 10 ^-4 mol of thiosulfonic acid compound-I was added per 1 mol of silver halide, and then AgBr fine particles having a diameter of 0.10 μm was added in an amount of 1.0 mol% with respect to the total amount of silver. After 5 minutes, 1% was added. KI solution of 10 ^-3 mol per mol of silver halide was added, and after 3 minutes, 1 × 10 ^-6 mol / mol Ag of thiourea dioxide was added.
The mixture was kept as it was for 1 minute to perform reduction sensitization. Next, 4-hydroxy-6-methyl-1,3,3a, 7-tetraazaindene was added at 3 × 10 ⁻⁴ mol / mol Ag and sensitizing dye-1,
2 were each added. Further calcium chloride was added. Further, 1 × 10 ⁻⁵ mol / mol Ag of chloroauric acid and 3.0 × 10 ⁻³ mol / mol Ag of potassium thiocyanate were added, and then sodium thiosulfate (6 × 10 ⁻⁶ mol / mol Ag) was added.
Mol Ag) and selenium compound-I (4 × 10 ⁻⁶ mol / mol Ag). After another 3 minutes, the nucleic acid (0.5 g /
Mol Ag) was added. After 40 minutes, water-soluble mercapto compound-1 was added and cooled to 35 ° C. Thus, preparation of the emulsion (chemical ripening) was completed.

[0089]

[Chemical 6]

(Preparation of emulsion coating layer) An emulsion coating solution was prepared by adding the following chemicals to 1 mol of silver halide to the chemically sensitized emulsion.・ Gelatin (including gelatin in emulsion) 111 g ・ Dextran (average molecular weight 39,000) 21.5 g ・ Sodium polyacrylate (average molecular weight 400,000) 5.1 g ・ Sodium polystyrene sulfonate (average molecular weight 600,000) 1.2g-Hardener 1,2-bis (vinylsulfonylacetamide) ethane Addition amount was adjusted so that the swelling ratio would be 230% -Compound-I 42.1mg-Compound-II 10.3g-Compound- III 0.11g-Compound-IV 8.5mg-Compound-V 0.43g-Compound-VII 0.1g-Compound-VIII 0.1g Adjusted to pH 6.1 with NaOH.

[0091]

Embedded image

[0092]

Embedded image

Dye emulsion A was added to the above coating solution so that the amount of Dye-I was 10 mg / m ² per side.

[0094]

Embedded image

(Preparation of Dye Emulsion A)
0g and 62.8 g of the following high boiling point organic solvent-I, -II
Was dissolved at 60 ° C. in 62.8 g and ethyl acetate 333 g. Next, 65 cc of a 5% aqueous solution of sodium dodecyl sulfonate, 94 g of gelatin and 581 cc of water were added, and the mixture was emulsified and dispersed at 60 ° C. for 30 minutes with a dissolver. Next, 2 g of the following compound-VI and 6 liters of water were added, and the temperature was lowered to 40 ° C. Next, Asahi Kasei Ultrafiltration Lab Module AC
Using P1050, the mixture was concentrated to a total amount of 2 kg, and 1 g of the compound-VI was added to obtain a dye emulsion A.

[0096]

Embedded image

(Preparation of Coating Solution for Surface Protective Layer) A coating solution for surface protective layer was prepared so that each component had the following coating amount.・ Gelatin 0.780 g / m ²・ Sodium polyacrylate (average molecular weight 400,000) 0.035 ・ Sodium polystyrene sulfonate (average molecular weight 600,000) 0.0012 ・ Polymethyl methacrylate (average particle size 3.7 μm) 072-Coating aid-I 0.020-Coating aid-II 0.037-Coating aid-III 0.0080-Coating aid-IV 0.0032-Coating aid-V 0.0025-Compound-VII 0.0022 ・ Proxel 0.0010 (pH adjusted to 6.8 with NaOH)

[0098]

Embedded image

(Preparation of Support) (1) Preparation of Dye Dispersion B for Undercoat Layer Dyes IV and V below were ball-milled by the method described in JP-A-63-197943.

[0100]

Embedded image

Water 434 cc and Triton X200
(Registered trademark) surfactant (TX-200 (registered trademark))
And 791 cc of a 6.7% aqueous solution of the above were placed in a 2 liter ball mill. 20 g of the dye were added to this solution. 400 ml (2 mm diameter) beads of zirconium oxide (ZrO ₂ ) were added, and the contents were ground for 4 days. Thereafter, 160 g of 12.5% gelatin was added. After defoaming, Zr is filtered
O ₂ beads were removed. Observation of the obtained dye dispersion showed that the particle size of the crushed dye was 0.05 to 1.15 μm.
m, with an average particle size of 0.3
It was 7 μm. Furthermore, dye particles having a size of 0.9 μm or more were removed by centrifugation. Thus, a dye dispersion B was obtained.

(2) Preparation of Support Corona discharge was performed on a biaxially stretched polyethylene terephthalate film having a thickness of 175 μm, and the coating amount of the first undercoat liquid having the following composition was 4.9 cc / m ^2. Thus, it was applied by a wire converter and dried at 185 ° C. for 1 minute. Next, a first undercoat layer was similarly provided on the opposite surface. The polyethylene terephthalate used is a dye-
The one containing 0.04% by weight of I was used.・ Butadiene-styrene copolymer latex solution (solid content 40% butadiene / styrene weight ratio = 31/69) 158cc ・ 2,4-dichloro-6-hydroxy-s-triazine sodium salt 4% solution 41cc ・ Distilled water 801cc * The latex solution contains the following compounds as emulsifying dispersants in an amount of 0.4 wt% based on the latex solids.

[0103]

Embedded image

(3) Coating of undercoat layer On each of the above-mentioned first undercoat layers, a second undercoat layer having the following composition is applied on each side so that the coating amount is as described below. To the wire bar coder method,
It was dried at 155 ° C.・ Gelatin 80 mg / m ²・ Dye Dispersion B (as dye solid content) 8 ・ Coating aid-VI 1.8 ・ Compound-VIII 0.27 ・ Mat agent Polymethylmethacrylate 2.5 with an average particle size of 2.5 μm

[0105]

Embedded image

(Preparation of photographic material) The above emulsion layer and the surface protective layer were combined on the support prepared as described above and coated on both sides by the simultaneous extrusion method. The amount of silver applied per side was 1.75 g / m ² . Table 1 shows the prepared coating samples.

[0107]

[Table 1]

(Evaluation of Photographic Performance) The photographic material was exposed from both sides for 0.05 seconds by using X Ray Orthoscreen HR-4 manufactured by Fuji Photo Film Co., Ltd. After exposure,
The sensitivity was evaluated using the following automatic developing machine and processing solution. The sensitivity was expressed as the logarithm of the reciprocal of the exposure required to give a density of fog + 0.1, and the other was expressed as a relative value with the sensitivity of the coated sample 1 being 100.

(Processing) Automatic developing machine ... Preparation of CEPROS-30M concentrated solution manufactured by FUJIFILM Corporation <Developer> Part agent A potassium hydroxide 330 g potassium sulfite 630 g sodium sulfite 255 g potassium carbonate 90 g boric acid 45 g diethylene glycol 180 g Diethylenetriaminepentaacetic acid 30 g 1- (N, N-diethylamine) ethyl-5-mercaptotetrazole 0.75 g Hydroquinone 450 g Water was added to 6000 ml pH 4.68

(Preparation of Processing Solution) The developer concentrate was filled in the following containers for each parts agent. In this container, the respective partial containers of the parts agents A, B, and C are connected together by the container itself. The above-mentioned fixer concentration was also filled in the same type of container. First, as a starter in the developing tank,
Aqueous solution 30 containing 54 g of acetic acid and 55.5 g of potassium bromide
0 ml was added. Insert the processing agent container upside down and insert it into the perforation blade of the processing liquid stock tank mounted on the side of the automatic processing machine, break the sealing film of the cap, and transfer each processing agent in the container to the stock tank. Filled. These processing agents were filled in the developing tank and the fixing tank of the automatic processing machine at the following ratios by operating the pumps respectively installed in the automatic processing apparatus. Also,
Each time the photosensitive material was processed into eight pieces in terms of the size of a quarter, the stock solution of the processing agent and water were mixed at this ratio and replenished into the processing tank of the automatic processing machine.

Developer solution Part solution A 51 ml Part solution B 10 ml Part solution C 10 ml Water 125 ml pH 10.50 Fixer concentrate 80 ml water 120 ml pH 4.62 The wash tank was filled with tap water.

Parts Agent A 4-Hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone 60 g Water was added to give 4125 ml.

Parts Agent B Diethylene glycol 525 g 3,3 ′ Dithiobishydrocinnamic acid 3 g Glacial acetic acid 102.6 g 2-Nitroindazole 3.75 g 1-Phenyl-3-pyrazolidone 34.5 g Water 750 ml

Parts agent C Glutaraldehyde (50 wt / wt%) 150 g Potassium bromide 15 g Potassium metabisulfite 105 g Water added 750 ml

<Fixer> Ammonium thiosulfate (70 wt / mol%) 3000 ml Ethylenediaminetetraacetic acid / sodium dihydrate 0.45 g Sodium sulfite 225 g Boric acid 60 g 1- (N, N-diethylamine) -ethyl-5-mercapto Tetrazole 15g Tartaric acid 48g Glacial acetic acid 675g Sodium hydroxide 225g Sulfuric acid (36N) 58.5g Aluminum sulfate 150g Also, as a water stain inhibitor, actinomycetes have an average particle size of 100μ.
m, an average pore diameter of 3 μm supported on pearlite.
Prepare 3 bottles of 4 g filled in a polyethylene bottle (the bottle opening is covered with a 300 mesh nylon cloth and water and bacteria can flow from this cloth), and 2 of them are placed at the bottom of the washing tank. One of them was submerged in the bottom of a stock tank of washing water (liquid volume 0.2 liter). Processing speed and processing temperature Current image 35 ° C 8.8 seconds Fixed 32 ° C 7.7 Washed with water 17 ° C 3.8 Squeeze 4.4 Dry 58 ° C 5.3 Total 30 Replenishment amount Developer 8 ml / 10 × 12 inches Fixer 8 ml / 10 × 12 inches The results are shown in Table 2.

[0116]

[Table 2]

As shown in Table 2, the photographic light-sensitive material of the present invention showed excellent photographic performance.

Evaluation of Pressure Property The photographic material was conditioned at 25 ° C. and 25% RH for 1 hour, and then bent under the same condition by 180 ° in accordance with a stainless pipe having a diameter of 6 mm. The bending speed was set to bend at 180 ° in one second, and returned to the original state in the next one second. Thirty minutes after the bending, the same processing as when the photographic performance was evaluated was performed. After that, the increase in the density of the blackened portion along the stainless steel pipe (excluding the fog inherent in the emulsion and the base density) was visually evaluated according to the following criteria. ◎ ・ ・ ・ ・ Blackening density is low and there is no desensitization. ○ ・ ・ ・ ・ Blackening density is relatively low and less desensitization. △ ・ ・ ・ ・ Blackening or desensitization is a practical allowable limit. × ・ ・ ・ ・ Blackening or desensitization is severe and there is a risk of misdiagnosis.

Example 2 The photographic light-sensitive material prepared in Example 1 was processed with the following developer. [Automatic processor processing] The automatic processor is "Fuji X Ray Processor CEPROS-M" manufactured by Fuji Photo Film Co., Ltd.
The drive shaft was modified so that the total processing time was 30 seconds. The dry blowing temperature was set to 55 ° C. Developer formulation PartA Potassium hydroxide 18.0 g Potassium sulfite 30.0 g Sodium carbonate 30.0 g Diethylene glycol 10.0 g Diethylenetriaminepentaacetic acid 2.0 g 1- (N, N-diethylamino) ethyl-5-mercaptotetrazole 0.1 g L- Ascorbic acid 43.2 g 4-Hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone 2.0 g Water was added to 300 ml.

Part B Triethylene glycol 45.0 g 3,3'-Dithiobishydrocinnamic acid 0.2 g Glacial acetic acid 5.0 g 5 Nitroindazole 0.3 g 1-Phenyl-3-pyrazolidone 3.5 g Water was added to 60 ml.

PartC Glutaraldehyde (50%) 10.0 g Potassium bromide 4.0 g Potassium metabisulfite 10.0 g Water was added to 50 ml PartA 300 ml, PartB 60 ml and PartC5.
Water is added to 0 ml to make 1 liter and adjusted to pH 10.90. Part A 4.50 liters, Part B 0.
90 liters and 0.75 liters of PartC were filled in a CE-DF1 bottle manufactured by FUJIFILM Corporation and used for 1.5 liters of the working liquid. Development Starter Solution Acetic acid was added to the above-mentioned development replenisher solution to adjust the pH to 10.20, which was used as a development starter solution.

As the fixing solution, CE-F1 manufactured by Fuji Photo Film Co., Ltd. was used. Development temperature ・ ・ ・ 35 ℃ Fixing temperature ・ ・ ・ 35 ℃ Drying temperature ・ ・ ・ 55 ℃ Replenishment amount (both developer and fixer) 5ml / 10 × 21 inches (65ml / m ² ) each A sample 10 × 12 inch size film was subjected to a running process of 600 sheets, and good performance was obtained. It was found that the combination of the light-sensitive material of the present invention and the developing solution was good with no change in sensitivity at the start and in the running solution.

Example 3 The light-sensitive material of the present invention obtained in Example 1 was used as a light-sensitive material.
When an image was formed by X-ray exposure using the phosphor screen described in No. 4, it was confirmed that a good X-ray image was formed. Example 4 The light-sensitive material of the present invention obtained in Example 1 was used as H manufactured by FUJIFILM Corporation.
When an image was formed by X-ray exposure using a GM screen, it was confirmed that a good X-ray image was formed.

Claims (4)

[Claims] 1. A silver halide photographic light-sensitive material having at least one emulsion layer, wherein at least one of the emulsions in the emulsion layer is an emulsion (1) having the following characteristics. Silver halide photographic light-sensitive material. After tabular silver halide grains having an aspect ratio of 2 or more occupy 50 to 100% of the projected area of all silver halide grains, the silver halide emulsion (2) is desalted, and then the emulsion (2) is seed crystal emulsion. The tabular silver halide grains having an aspect ratio of 2 or more, which are prepared by using the above, account for 50 to 100% of the projected area of all silver halide grains, and the silver chloride content is 20%.
The above silver halide emulsion (1). 2. The silver halide photographic light-sensitive material according to claim 1, wherein an oxidizing agent for silver is added when the emulsion (2) is prepared. 3. The protective colloid used when forming the seed crystal emulsion (2) is different from the protective colloid used when growing the emulsion (1) after washing the emulsion (2) with demineralized water. The silver halide photographic light-sensitive material as described in 1 or 2. 4. The silver halide photographic light-sensitive material according to claim 1, wherein the main planes of the tabular grains in emulsions (1) and (2) are {100} planes.