JPH07104407A - Silver halide photographic emulsion and silver halide photographic material - Google Patents

Abstract

PURPOSE:To provide silver halide photographic emulsion which has high sensitivity and excellent particulate characteristics even after the storage for a long period after manufacture, and provide silver halide photographic material using the silver halide photographic emulsion. CONSTITUTION:On the dislocation plane which is vertical to two parallel main planes, passing through the center of a particle, consists of planar silver halide particles in 50% or more of the whole projection area and has the ratio of at least ten pieces of the number of transition lines per particle of 50% or more (pieces), the distance between two parallel main planes is set D, and the distance between two opposed surfaces in the direction parallel to the main plane, passing through the center of the particle, is set L, and then the average silver iodide content (a) in the region where the distance from the rectilinear line which passes through the center of the particle and is parallel to the main plane is 9D/2D or more, and the average silver iodide content (b) in the region where the distance from the rectilinear line which passes through the center of the particle and is vertical to the main plane is 9L/20 or more satisfy the following relation: ¦(a-b)/a¦<=0.15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic emulsion and a silver halide photographic light-sensitive material using the same, and more specifically, to sensitivity and graininess after long-term storage after production of a silver halide photographic light-sensitive material. The present invention relates to a silver halide photographic emulsion used for an excellent silver halide photographic light-sensitive material and a silver halide photographic light-sensitive material using the same.

[0002]

2. Description of the Related Art The spread of photography equipment such as cameras has been increasing in recent years, and the opportunity for photography using silver halide photographic light-sensitive materials has been increasing.

The demands for higher sensitivity and higher image quality are increasing.

[0004] One of the dominant factors for high sensitivity and high image quality of silver halide photographic light-sensitive materials is silver halide grains. Silver halide aiming at higher sensitivity and higher image quality The development of particles has been promoted in the art in the past.

However, as is generally done, when the grain size of silver halide grains is reduced in order to improve the image quality, the sensitivity tends to decrease, and both high sensitivity and high image quality are satisfied. There was a limit.

A technique for improving the sensitivity / size ratio per silver halide grain has been researched in order to further improve the sensitivity and the image quality. One of them is a tabular silver halide grain. The technology of using is Japanese Patent Laid-Open No. 58-111935
Issue 58-111936, Issue 58-111937, Issue 58-113927,
No. 59-99433, etc.

When these tabular silver halide grains are compared with so-called normal crystal silver halide grains such as octahedron, decahedron or hexahedron, when the volume of the silver halide grains is the same, the surface area is large and therefore There is an advantage that more sensitizing dye can be absorbed on the surface of the silver halide grain and the sensitivity can be further enhanced.

Further, JP-A-63-92942 discloses a technique of providing a core having a high silver iodide content inside a tabular silver halide grain, and JP-A-63-151618 discloses a hexagonal tabular silver halide grain. Are used, and their effects on sensitivity and graininess are shown.

Further, JP-A-63-106746 discloses a tabular silver halide grain having a substantially layered structure in a direction parallel to two principal planes facing each other. Have a layered structure divided by planes substantially parallel to the two opposing main planes, and the average silver iodide content of the outermost layer is the average silver iodide content of the entire silver halide grains. The technique using tabular silver halide grains each having a ratio of at least 1 mol% or more is described.

In addition to this, Japanese Patent Application Laid-Open No. 1-183644 discloses a technique using tabular silver halide grains characterized in that the silver iodide containing silver iodide has a completely uniform silver iodide distribution. There is.

There are also several reports on the technique relating to parallel twin planes in tabular silver halide grains. For example, in JP-A-63-163451, a tabular halogen having a ratio (b / a) of the longest distance (a) between two or more parallel twin planes to the grain thickness (b) of 5 or more. A technique using silver halide grains and a technique in which the number of dislocation lines are also defined are disclosed in JP-A-1-201649, and effects on sensitivity, graininess and sharpness are reported.

Further, in WO91 / 18320,
A technique using tabular silver halide grains in which the distance between at least two twin planes is less than 0.012 micron is disclosed in Japanese Patent Application No.
In 3-353043, the average of the longest twinning distance is 10 to 10
Techniques using core / shell twinned silver halide grains of 0Å have been reported, and improvement effects on sensitivity, graininess or sharpness, pressure characteristics, and graininess have been described, respectively.

Regarding dislocation lines, in the prior art, for example, in JP-A-63-220238, a technique using a silver halide emulsion containing tabular silver halide grains in which the number of dislocation lines is specified is disclosed in JP-A-3- No. 175440, photographic performances relating to sensitivity and pressure resistance are improved by using the technology using silver halide photographic emulsions containing tabular silver halide grains in which dislocations are concentrated near the apexes of grains. Has been reported.

In consideration of the distribution and consumption of silver halide photographic light-sensitive materials in the market, the user purchases the silver halide photographic light-sensitive material rather than the photographic performance immediately after the production or at the time of shipment, and actually takes a picture. It is extremely important to stably realize high sensitivity and high image quality at the time of development, that is, after long-term storage in the market, but the photographic performance obtained by the conventional technology is insufficient, and it is more excellent. Development of the technology was required.

[0015]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a silver halide photographic light-sensitive material which provides a silver halide photographic light-sensitive material having high sensitivity and excellent graininess even after long-term storage after production and a silver halide photographic emulsion. Another object of the present invention is to provide a silver halide photographic light-sensitive material using.

[0016]

The above-mentioned object of the present invention can be achieved by any of the constituents described below.

At least 50% of the total projected area of the silver halide grains contained in the silver halide emulsion are tabular silver halide grains, and the tabular silver halide grains have a high silver iodide content inside. The tabular silver halide having a silver halide phase, the tabular silver halide grains having a dislocation line number of 10 or more per grain is 50% or more (number), and In a fault plane that passes through the center of the particle and is perpendicular to the two parallel principal planes, let D be the distance between the two parallel principal planes, and let the distance between the two parallel principal planes be two in the direction parallel to the principal plane. When the distance between the surfaces facing each other is L, the average silver iodide content a in the region where the distance from the straight line passing through the center of the grain and parallel to the main plane is 9D / 20 or more, and the center of the grain An area with a distance of 9L / 20 or more from a straight line passing through and perpendicular to the main plane And the average silver iodide content b of
(A−b) /a|≦0.15 A silver halide photographic emulsion containing silver halide grains.

[0018] The average silver iodide content on the surface of silver halide grains is 4 mol% or less, and the tabular silver halide grains have two twin planes parallel to the main plane. Silver halide photographic emulsion.

In a silver halide photographic light-sensitive material having at least one silver halide emulsion layer on a support,
A silver halide photographic light-sensitive material, wherein at least one layer of the silver halide photographic emulsion contains the silver halide photographic emulsion described above or described.

The present invention will be described in detail below.

The silver halide grains contained in the silver halide photographic emulsion of the present invention are tabular silver halide grains in which 50% or more of the total projected area thereof are tabular silver halide grains. The tabular silver halide grains are crystallographically classified as twins.

A twin is a silver halide crystal having one or more twin planes in one grain. The morphology of twins is classified by Klein and Moiser in the article Photographic Correspondents. (Photographishe Korrespondenz)
Volume 99, page 99, volume 100, page 57.

In the present invention, the ratio of tabular silver halide grains to the total projected area of silver halide grains is preferably 60% or more, more preferably 70% or more.

In the tabular silver halide grain in the present invention, the average value of the ratio of grain size to grain thickness (also referred to as aspect ratio) is preferably 1.3 or more and less than 5.0, more preferably 1.5 or more and less than 4.5, and further It is more preferably 2.0 or more and less than 4.0. The average aspect ratio is obtained by averaging the ratio of grain size to thickness of all tabular grains.

The tabular silver halide grain in the present invention preferably has two twin planes parallel to the main plane, and more preferably two tabular planes parallel to the main plane in the tabular silver halide grain. The ratio of silver halide grains
60% or more (number), more preferably 70% or more,
Most preferably, it is 80% or more.

The twin plane can be observed with a transmission electron microscope. The specific method is as follows. First,
A silver halide photographic emulsion is coated on a support so that the main planes of the tabular silver halide grains contained therein are oriented substantially parallel to the support to prepare a sample. This is cut with a diamond cutter to obtain a thin section with a thickness of about 0.1 μm. The presence of twin planes can be confirmed by observing this section with a transmission electron microscope.

The average grain size of the tabular silver halide grains of the present invention is preferably 0.1 μm or more and 5.0 μm or less, more preferably
0.2 μm or more and 4.0 μm or less, most preferably 0.3 μm or more and 3.0
It is less than μm.

In the present invention, the average particle size is defined as the particle size ri when the frequency ni and ri ³ of the particles having the particle size ri is the maximum of ni × ri ³ . (3 significant figures and 4 figures are rounded off to the nearest digit.) (The number of measured particles is 1 indiscriminately.
It shall be 000 or more. The grain size ri here is the diameter of a tabular silver halide grain when the projection image when viewed from a direction perpendicular to the main plane is converted into a circular image having the same area.

The grain size ri can be obtained by taking an image of a tabular silver halide grain with an electron microscope at a magnification of 10,000 to 70,000 and measuring the grain diameter on the print or the area at the time of projection. it can.

The thickness of tabular silver halide grains is
Similarly, it can be obtained by actually measuring the thickness of particles on a photographed print from a direction parallel to the principal plane.

The silver halide photographic emulsion according to the present invention may be any one such as a polydisperse emulsion having a wide grain size distribution and a monodisperse emulsion having a narrow grain size distribution, but a monodisperse emulsion is preferred.

The monodisperse emulsion is

[0033]

[Equation 1]

When the breadth of the distribution is defined by, the breadth of the distribution is 20% or less, more preferably 15% or less.

The average particle diameter and standard deviation are obtained from the particle diameter ri defined above.

In the silver halide photographic emulsion of the present invention, any silver halide such as silver iodobromide, silver iodochloride, silver chloroiodobromide and the like used in ordinary silver halide emulsions can be used. However, silver iodobromide and silver chloroiodobromide are particularly preferred.

The silver halide grain contained in the silver halide photographic emulsion of the present invention may be a grain in which a latent image is mainly formed on the surface, or may be a grain mainly formed inside the grain. Good.

In the present invention, when silver iodobromide is used,
The silver iodide content is preferably 2 mol% or more and 15 mol% or less, more preferably 3 mol% or more and 12 mol% or less, as an average silver iodide content in the entire silver halide grains. , Particularly preferably 4 mol% or more and 12 mol% or less.

The silver halide grains contained in the silver halide photographic emulsion of the present invention have a silver halide phase having a high silver iodide content inside the grains, but the silver iodide is concentrated inside, so-called core / It may be shell type particles.

When the core / shell type particles are used,
It is a particle composed of a core that serves as a core and a shell that covers the core, and the shell is formed by one or more layers. The silver iodide content of the core and shell is
Each is preferably different.

In the present invention, the inside of the tabular silver halide grains means the inside of the grain size corresponding to 80% by volume of the silver halide grains, preferably 70% inside and more preferably 60%. More inside.

In the present invention, the silver halide phase having a high silver iodide content is a silver halide phase having an average silver iodide content of 5 mol% or more and a solid solution limit or less, and preferably 7
It is not less than mol% and not more than the solid solution limit, more preferably not less than 10 mol% and not more than the solid solution limit.

In the present invention, the solid solution limit is represented by the maximum mol% of iodide which can exist as a solid solution in silver halide. Specifically, “The Theory of Photo” edited by TH James
Graphic Process ”, 4th edition (published by Macmillan), can be determined by the method described on page 4. In the case of silver iodobromide, Imax (mol%) = 34.5 + 0.165 (t-25) (t is It can be calculated by the temperature (Celsius).

In the present invention, the content of silver iodide in the grain can be measured by the X-ray microanalysis method.

The X-ray microanalysis method will be described. Silver halide grains are dispersed in an electron microscope observation grid equipped with an energy dispersive X-ray analyzer on an electron microscope, and the magnification is set so that one grain is in the CRT field by liquid nitrogen cooling. AgLα and The intensity of ILα rays is integrated. The silver iodide content can be calculated using the intensity ratio of ILα / AgLα and a calibration curve prepared in advance.

The average silver iodide content in the vicinity of the surfaces of silver halide grains contained in the silver halide photographic emulsion of the present invention is 4.0
It is preferably not more than mol%, more preferably 3.5
It is at most mol%, most preferably at most 3.0 mol%.

The average silver iodide content in the vicinity of the surface of the silver halide grains contained in the silver halide grains contained in the silver halide photographic emulsion of the present invention is specifically determined by cooling a silver halide grain sample with liquid nitrogen. While X-ray photoelectron spectroscopy (XP
S method).

The XPS method used here is as follows.

Prior to measurement by the XPS method, the emulsion is pretreated as follows. First, a 0.05% by weight aqueous solution of proteolytic enzyme (pronase) is added to the emulsion, and gelatin is decomposed by stirring at 45 ° C for 30 minutes. Next, the emulsion particles are settled by centrifugation and the supernatant liquid is removed. Then, distilled water is added to disperse the emulsion particles in distilled water, and the mixture is centrifuged to remove the supernatant liquid. The emulsion particles are then redispersed in distilled water. This is thinly applied on a mirror-polished silicon wafer to obtain a measurement sample.

Using the sample thus prepared, XP
The average silver iodide content in the vicinity of the outermost surface of the silver halide grain was measured by S. In order to prevent the sample from being destroyed by the above-mentioned X-ray irradiation, the sample was cooled to −110 to −120 ° C. using liquid nitrogen or liquid helium in the XPS measurement chamber. Mg-Kα ray as X-ray for probe, X-ray source voltage 15KV,
It was irradiated with an X-ray power source current of 40 mA.

Ag3d, Br3d, and I3d3 / 2 electrons were detected to determine the halide composition near the outermost surface of the silver halide grain.
The composition ratio was calculated by correcting the integrated intensity of each measured peak with a sensitivity factor (Sensitivity Factor), and calculating the average silver iodide content near the outermost surface of the silver halide grain from these intensity ratios.

The tabular silver halide grains contained in the silver halide photographic emulsion of the present invention are provided in a fault plane passing through the center of the grain and perpendicular to two parallel principal planes between the two parallel principal planes. Let D be the distance, and let C be the distance between two opposing surfaces that pass through the center of the particle and that are parallel to the principal plane.
, The average silver iodide content a in the region where the distance from the straight line passing through the center of the grain and parallel to the main plane is 9D / 20 or more.
And the average silver iodide content b in the region where the distance from the straight line passing through the center of the grain and perpendicular to the main plane is 9 C / 20 or more is | (a
-B) /a|≤0.15, preferably | (ab)
/A|≦0.10, and more preferably | (ab) / a
| ≦ 0.05.

In the tabular silver halide grains contained in the silver halide photographic emulsion of the present invention, the distance between two parallel principal planes in the tomographic plane passing through the center of the tabular silver halide grains and perpendicular to the principal plane. D and the distance C between two opposing surfaces in the direction passing through the center of the tomographic plane and parallel to the principal plane are as follows after the silver halide photographic emulsion of the present invention is gelatinized with a protease. The tabular silver halide grains contained in the silver halide photographic emulsion were embedded with methacrylic resin, a 800 Å-thick section was prepared with a diamond cutter, and observed with a transmission electron microscope.
It can be determined by taking a photograph of the visual field and measuring the distance on the photograph.

In the tabular silver halide grains contained in the silver halide photographic emulsion of the present invention, the distance from the center of the silver halide grains in the direction perpendicular to the main plane is 9D / 20.
The average silver iodide content a in the above region and the average silver iodide content b in the region in which the distance from the center of the silver halide grain in the direction parallel to the main plane are 9 C / 20 or more are With respect to the above-mentioned section used in the observation with a microscope, the silver iodide content in each of two points symmetrical with respect to the center of the grain was measured by point analysis using the EPMA method well known in the art. Each can be obtained by averaging.

The dislocation lines of the tabular silver halide grains according to the present invention are, for example, JF Hamilton, Phot.Sci.Eng., 11, 57 (1)
967), T. Shiozawa, J.Soc.Phot.Sci.Japan, 35, 213 (1
It can be observed by a direct method using a transmission electron microscope at low temperature described in 972). That is, the silver halide grains taken out carefully so as not to apply pressure to the grains causing dislocations on the emulsion are placed on the mesh for electron microscope observation, and the sample to prevent damage (printout etc.) due to electron beam In the cooled state, observation is performed by the transmission method. At this time, the thicker the particles, the more difficult it is for the electron beam to pass therethrough. Therefore, it is possible to observe more clearly using a high-voltage electron microscope (200 KV or more for particles with a thickness of 0.25 μm). .

The position and number of dislocation lines for each grain can be determined from the photograph of the grain obtained by such a method.

The position of the dislocation line of the tabular silver halide grain according to the present invention is preferably in the region of 0.58 L to L from the center of the silver halide grain toward the outer surface. It is preferably generated in the region of 0.70 L to 0.98 L. The direction of the dislocation line is approximately from the center to the outer surface, but it often meanders.

In the present invention, the center of a silver halide grain means that silver halide microcrystals are dispersed in a methacrylic resin in the same manner as in the method described in Inoue et al. Then, solidify it, make it into an ultrathin section with a microtome, and pay attention to the section sample with the maximum cross-sectional area and the cross-sectional area of 90% or more, and draw the circumscribed circle that is the minimum with respect to the section. It is the center of the circle when.

In the present invention, the distance L from the center to the outer surface is defined as the distance between the center of the circle and the point intersecting the outer circumference of the particle when a straight line is drawn from the center of the circle to the outside.

The tabular silver halide grains according to the present invention are
The ratio of the number of dislocation lines per grain being 10 or more is 50% or more (number), more preferably 60% or more, further preferably 70% or more, and most preferably 1 grain The ratio of dislocation lines being 20 or more is 70% or more (number).

The silver halide grains contained in the silver halide photographic emulsion of the present invention are prepared by preliminarily allowing an aqueous solution containing a protective colloid and seed grains, if necessary, to be present in a reaction vessel, and if necessary silver ions, halogen ions or It is obtained by supplying fine silver halide grains to form silver halide nuclei and then growing crystals, or by growing seed grains, but it is preferable to use seed grains. Here, the seed particles can be prepared by a single jet method, a control double jet method or the like well known in the art. The halogen composition of the seed grains is arbitrary, silver bromide,
It may be any of silver iodide, silver chloride, silver iodobromide, silver chlorobromide, silver chloroiodobromide, and silver chloroiodobromide, with silver bromide and silver iodobromide being preferred.

The seed particles used in the present invention may have a regular crystal form such as a cube, an octahedron or a tetradecahedron, or an irregular crystal form such as a sphere or a plate. It may be one. In these particles, {100} planes and {111} planes
Any surface ratio can be used. Further, those having a composite form of these crystal forms may be used, and particles of various crystal forms may be mixed, but it is preferable to use twin seed particles described in Japanese Patent Application No. 3-341164.

As the means for forming the silver halide photographic emulsion according to the present invention, various methods well known in the art can be used. That is, the single jet method,
The double jet method, the triple jet method and the like can be used in any combination.

The silver halide photographic emulsion of the present invention can be produced by any of the acidic method, the neutral method and the ammonia method, but it is preferable to use the acidic method or the neutral method, most preferably the neutral method. Method is used.

In the production of the silver halide photographic emulsion of the present invention, the halide ion and the silver ion may be mixed at the same time or one of them may be present while the other is mixed. Further, while considering the critical growth rate of silver halide crystals, halide ions and silver ions may be grown successively or simultaneously while controlling pAg and pH in the mixing vessel. The conversion method may be used to change the silver halide composition of the grains at any step of the silver halide formation. Further, halide ions and silver ions may be supplied as fine silver halide particles into the mixing vessel.

In the present invention, to control the silver iodide content inside and on the surface of tabular silver halide grains,
The silver halide grain grows only in the main plane direction, or avoids a growth environment in which it grows only in the side direction, shell growth is relatively evenly performed in both the main plane direction and the side direction, and It is necessary to appropriately select the growth conditions in which recrystallization that hinders the coating of the high silver iodide content phase inside the silver halide grain with the shell is prevented.

In the production of silver halide grains contained in the silver halide photographic emulsion of the present invention, the concentration of the additive solution containing halide ions, silver ions or silver halide fine particles in the growth of the silver halide grains, the growth pAg It is important to select the concentration of gelatin in the aqueous solution in which the silver halide grains are grown and the growth temperature. The concentration of the additive liquid containing halide ions and silver ions is preferably 0.5 to 4 mol / l, more preferably 1.5 to 3.5 mol / l. The concentration of the addition liquid containing fine silver halide grains is preferably 0.3 to 2.0 ml / l, more preferably 0.5 to 1.5 mol / l. Growth pAg is 7.8
Is preferably 9.7 to 9.7, more preferably 8.2 to 9.4, and even more preferably 8.4 to 9.2. The gelatin concentration in the aqueous solution in which silver halide grains are grown is preferably 0.5 to 4.0%. The growth temperature is preferably 60 to 90 ° C, more preferably 70 to 80 ° C.

In the present invention, silver iodide is controlled by appropriately controlling the flow rate balance of an aqueous solution containing halide ions, an aqueous solution containing silver ions, and an additive solution containing fine silver halide grains during growth from seed grains. It is preferred that the formation of a silver halide phase containing is carried out.

In the production of the silver halide photographic emulsion of the present invention, a known silver halide solvent such as ammonia, thioether or thiourea can be present.

The silver halide grains contained in the silver halide photographic emulsion of the present invention have a cadmium salt, a zinc salt, a lead salt, a thallium salt, an iridium salt (complex salt) in the process of forming and / or growing the grains. Including), rhodium salt (including complex salt), iron salt (including complex salt), etc., can be added to the metal ion to allow these metal elements to be contained inside the particle and / or on the surface of the particle. By placing in such a reducing atmosphere, reduction sensitizing nuclei can be imparted to the inside of the grain and / or the surface of the grain.

In the silver halide photographic emulsion of the present invention,
In order to introduce dislocations into the silver halide grains, for example, a method of providing a specific high iodine phase inside the silver halide grains can be used. In this case, the high iodine phase is silver iodide,
Silver iodobromide and silver chloroiodobromide are preferable, silver iodide or silver iodobromide is more preferable, and silver iodide is particularly preferable.

As a method for this, for example, a conversion method by adding an iodide salt alone, or, for example, JP-A-58 / 1983
-108526, 59-133540 and 59-162540 may be used.

When the conversion method is carried out by adding the iodide salt alone, the addition amount of the iodide salt is 1
The amount is preferably 10 ^-6 to 10 ^-1 mol, and more preferably 3 × 10 ^{-5 to} 3 × 10 ^-2 mol per mol. The addition can be performed using a funnel or a pump, but the addition time is preferably within 10 minutes, more preferably within 5 minutes. The timing of addition can be arbitrarily set depending on the position where the dislocation line is desired to be introduced.

In the silver halide photographic emulsion of the present invention, unnecessary soluble salts may be removed after the completion of the growth of silver halide grains, or may remain contained. When removing the salts, Research Disclosure (Re
search Disclosure (hereinafter abbreviated as RD) can be performed based on the method described in Item 17643, Item II.

Conditions other than those mentioned above in the production of the silver halide photographic emulsion according to the present invention are described in JP-A-61-6643.
No. 61, No. 61-14630, No. 61-112142, No. 62-157024,
62-18556, 63-92942, 63-151618, 63-1634
The optimum conditions can be selected by referring to known methods such as No. 51, No. 63-220238 and No. 63-311244.

The silver halide photographic emulsion of the present invention can be preferably used in a silver halide photographic light-sensitive material, more preferably a silver halide color photographic light-sensitive material.

When a color photographic light-sensitive material is constituted by using the silver halide photographic emulsion of the present invention, the silver halide photographic emulsion used is one which has been physically ripened, chemically ripened and spectrally sensitized. The additives used in such a process are Research Disclosure No.17643, No.18716 and N.
o.308119 (Respectively RD17643, RD18716 and RD30811
(Abbreviated as 9)). The following shows the locations.

[Item] [Page of RD308119] [RD17643] [RD18716] Chemical sensitizer 996 III-A Item 23 648 Spectral sensitizer 996 IV-A-A, B, C, D, H, I, J Item 23-24 648-9 Supersensitizer 996 IV-AE, J Item 23-24 648-9 Antifoggant 998 VI 24-25 649 Stabilizer 998 VI 24-25 649 Silver halide of the present invention Known photographic additives which can be used when a color photographic light-sensitive material is constituted by using a photographic emulsion are also described in the following Research Disclosure.
Below are the relevant locations.

[Item] [Page of RD308119] [RD17643] [RD18716] Color turbidity inhibitor 1002 VII-I item 25 650 Dye image stabilizer 1001 VII-J item 25 Whitening agent 998 V 24 UV absorber 1003 VIII- C, XIII C Item 25 to 26 Light absorber 1003 VIII 25 to 26 Light scattering agent 1003 VIII Filter dye 1003 VIII 25 to 26 Binder 1003 IX 26 651 Antistatic agent 1006 XIII 27 650 Hardener 1004 X 26 651 Plasticizer 1006 XII 27 650 Lubricants 1006 XII 27 650 Activators / coating aids 1005 XI 26 to 27 650 Matte agents 1007 XVI Developer (included in light-sensitive material) Item 1011 XXB Color photographic light-sensitive using the silver halide photographic emulsion of the present invention Various couplers may be used in constructing the material, specific examples of which are described in Research Disclosure below.

The relevant description is shown below.

[Item] [Page of RD308119] [RD17643] Yellow coupler 1001 VII-D item VIIC-G item Magenta coupler 1001 VII-D item VIIC-G item Cyan coupler 1001 VII-D item VIIC-G item Colored coupler 1002 Item VII-G Item VIIG Item DIR coupler 1001 Item VII-F Item VIIF Item BAR coupler 1002 Item VII-F Other useful residues Release coupler 1001 Item VII-F Alkali-soluble coupler 1001 Item VII-E Silver halide photograph of the present invention Additives used in constructing a color photographic light-sensitive material using an emulsion can be added by the dispersion method described in RD308119XIV.

When a silver halide photographic emulsion of the present invention is used to form a color photographic light-sensitive material, the above-mentioned RD17643 28 is used.
The supports described on page RD18716 pp. 647-8 and RD308119 XVII can be used.

The color photographic light-sensitive material using the silver halide photographic emulsion of the present invention can be provided with auxiliary layers such as a filter layer and an intermediate layer described in the above-mentioned item RD308119VII-K.

The color photographic light-sensitive material using the silver halide photographic emulsion of the present invention can have various layer constitutions such as the forward layer, the reverse layer and the unit constitution described in the above-mentioned item RD308119VII-K.

The silver halide photographic emulsion of the present invention is a color negative film for general use or movies, a color reversal film for slides or televisions, color paper,
It can be preferably applied to various color photographic light-sensitive materials represented by color positive films and color reversal papers.

The color photographic light-sensitive material using the silver halide photographic emulsion of the present invention is described in RD17643, pages 28 to 29, RD18716 61.
Development can be carried out by a usual method described on page 5 and XIX of RD308119.

[0087]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto.

Example 1 (Preparation of Twinned Seed Emulsion (TEm-1)) Seed from Japanese Patent Application No. 3-341164, a seed having two parallel twin planes was prepared by the following method. An emulsion (TEm-1) was prepared.

Solution A Ossein gelatin 80.0 g Potassium bromide 47.4 g HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 0.24 g water 8000 ml solution B silver nitrate 1200 g water 1600 ml solution C ossein gelatin 32.2 g potassium bromide 790 g potassium iodide 70.34 g water 1600 ml solution D ammonia water 470 ml JP-A-62-160128 Using the stirrer described, at 40 ° C., add Solution B and Solution C to the solution A stirred at 1000 rpm for 7 minutes by the double jet method,
Nucleation was performed. During this period, pBr was kept at 1.60.

Thereafter, the temperature was lowered to 20 ° C. over 35 minutes. Furthermore, the solution D was added over 2 minutes, and then the mixture was aged for 5 minutes.

After the aging, the pH was adjusted to 6.0 and desalting was carried out according to a conventional method. The average grain size of this seed emulsion grain is 0.225
It was μm.

(Preparation of Comparative Emulsion (Em-1)) A comparative emulsion (Em-1) containing core / shell type tabular silver halide grains was prepared using the following seven kinds of solutions.

Solution E-1 Oscein gelatin 359.0 g Distilled water 9606 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.25 ml solution F-1 2.0N silver nitrate aqueous solution Necessary amount solution G-1 2.0N potassium bromide aqueous solution containing 4.0% by weight gelatin Necessary amount solution H 3.1% by weight gelatin and silver iodide grains 1.06 mol of fine grain emulsion consisting of (average grain size 0.05 μm) The preparation method is shown below. To 995 ml of 5.0% by weight gelatin solution containing 0.025 mol of potassium iodide, 300 ml of an aqueous solution containing 1.06 mol of silver nitrate and 1.046 mol of potassium iodide were added over 35 minutes. Temperature is 4
The temperature was controlled at 0 ° C.

Solution I A method of preparing 3.53 mol of a fine grain emulsion composed of 4.5% by weight of gelatin and silver bromide fine grains (average grain size 0.04 μm) is shown below. Contains 0.0308 mol potassium bromide
To 2413 ml of a 9.3 wt% gelatin aqueous solution, 1007 ml of an aqueous solution containing 3.53 mol of silver nitrate and 1007 ml of an aqueous solution containing 3.75 mol of potassium bromide were added over 10 minutes. The pH during fine particle formation was controlled to 3.0 using nitric acid, and the temperature was controlled to 30 ° C. After particle formation, the pH was adjusted to 6.0 using an aqueous sodium carbonate solution.

Solution J Potassium bromide 1.75N aqueous solution Necessary amount Solution K seed emulsion (TEm-1) 0.130 moles It was kept at 75 ° C. in a reaction vessel which was vigorously stirred using the stirring apparatus described in JP-A-57-92523. After adding the solution K to the solution E-1, the solution F-1, the solution G-1, and the solution H were added by the simultaneous mixing method over 207 minutes, and then the solution I was continuously added for 10 minutes. It was added at a constant rate independently.

Here, the addition rates of the solution F-1 and the solution G-1 were changed in a function-like manner with respect to time so as to be commensurate with the critical growth rate, and generation other than the growing seed crystal and distribution due to Ostwald ripening It was added at an appropriate addition rate so as not to cause deterioration. Solution H vs. Solution F-1 Addition Rate
The core / shell type tabular silver halide grains having a multiple structure by setting the ratio of the addition rates of the above so that a silver halide phase having the silver iodide content (mol%) shown in Table 1 is formed. A silver halide photographic emulsion containing was prepared.

During the growth of silver halide grains, pAg was controlled as shown in Table 1 by appropriately using solution J.

After grain formation, desalting treatment is performed by a conventional method,
After that, gelatin is added and redispersed, and the pH is 5.80 and pAg at 40 ° C.
Was adjusted to 8.0.

The pAg and pH were measured by a conventional method using a silver sulfide electrode and a glass electrode.

[0100]

[Table 1]

(Preparation of Comparative Emulsion (Em-2)) In the preparation of Comparative Emulsion (Em-1), the following Solution E-2 was used in place of Solution E-1, and the amount of silver added was 40.0%. Comparative Emulsion (Em-2) was prepared in the same manner as above except that the solution L-1 was added in 30 seconds and pAg during silver halide growth and addition time were controlled as shown in Table 2.

Solution E-2 Oscein gelatin 359.0 g Distilled water 14606 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 0.875 ml L-1 emulsion (Em-1) 100 ml aqueous solution containing 0.005 mol potassium iodide per mol

[0103]

[Table 2]

(Preparation of Emulsion (Em-3) of the Present Invention) The following solution E-3 was used in place of the solution E-1 in the preparation of the comparative emulsion (Em-1), and the addition amount of silver was 40.0%. The emulsion (Em-3) of the present invention was prepared in the same manner except that the following solution L-2 was added.

Solution E-3 Oscein gelatin 270.0 g Distilled water 14672 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.25 ml solution L-2 aqueous solution containing 0.01 mol of potassium iodide per mol of emulsion (Em-1) 200 ml (Preparation of emulsion (Em-4) of the present invention) Comparative emulsion (Em-
In the preparation of 1), instead of the solution E-1, the following solution E-
4 and using the following solutions F-2 and G-2 instead of the solutions F-1 and G-1 and adding the following solution L-3 in 30 seconds when the amount of added silver is 40.0%. An emulsion (Em-4) of the present invention was prepared in the same manner except the above.

Solution E-4 Oscein gelatin 270.0 g Distilled water 14672 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.25 ml solution F-2 3.0N silver nitrate aqueous solution Necessary amount solution G-2 3.0N potassium bromide aqueous solution containing 4.0% by weight gelatin Necessary amount solution L-3 emulsion (Em-1) 1 mol 200 ml of an aqueous solution containing 0.01 mol of potassium iodide per unit (Preparation of emulsion (Em-5) of the present invention) Comparative emulsion (Em-
In the preparation of 1), instead of the solution E-1, the following solution E-
5, and the following solutions F-3 and G-3 were used instead of the solutions F-1 and G-1, respectively, and the following solution L-4 was added in 30 seconds when the amount of added silver was 40.0%. An emulsion (Em-5) of the present invention was prepared in the same manner except that the above was carried out.

Solution E-5 ossein gelatin 66.5 g distilled water 3323 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.25 ml solution F-3 3.5N silver nitrate aqueous solution Necessary amount solution G-3 3.5N potassium bromide aqueous solution containing 4.0% by weight gelatin Necessary amount solution L-4 emulsion (Em-1) 1 mol Aqueous solution containing 0.015 mol of potassium iodide per 300 ml (Preparation of emulsion (Em-6) of the present invention) Comparative emulsion (Em-
In the preparation of 1), instead of the solution E-1, the following solution E-
6 was used, and the following solutions F-4 and G-4 were used instead of the solutions F-1 and G-1, respectively, and the following solution L-5 was added for 2 minutes when the amount of added silver was 40.0%. An emulsion (Em-6) of the present invention was prepared in the same manner except the above.

Solution E-6 ossein gelatin 33.3 g distilled water 3350 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.50 ml solution F-4 3.5N silver nitrate aqueous solution Necessary amount solution G-4 3.5N potassium bromide aqueous solution containing 4.0% by weight gelatin Necessary amount solution L-5 emulsion (Em-1) 1 mol 300 ml of an aqueous solution containing 0.015 mol of potassium iodide per emulsion (Preparation of emulsion (Em-7) of the present invention) Comparative emulsion (Em-
In the preparation of 1), instead of the solution E-1, the following solution E-
7 and when the amount of added silver was 34.0%, the following solution L-
6 in 30 seconds, pAg during silver halide growth,
An emulsion (Em-7) of the present invention was prepared in the same manner except that the addition time was controlled as shown in Table 3.

Solution E-7 Oscein gelatin 146.5 g Distilled water 7391 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.25 ml solution L-6 emulsion (Em-1) 200 ml aqueous solution containing 0.01 mol potassium iodide per mol

[0110]

[Table 3]

(Preparation of Emulsion (Em-8) of the Present Invention) The following solution E-8 was used in place of the solution E-1 in the preparation of the comparative emulsion (Em-1), and the addition amount of silver was 34.0%. The following solution L-7 was added in 30 seconds, and the emulsion (Em-8) of the present invention was prepared in the same manner except that the pAg during silver halide growth and the addition time were controlled as shown in Table 3. Prepared.

Solution E-8 ossein gelatin 96.5 g distilled water 4929 ml HO (CH ₂ CH ₂ O) _m [CH (CH ₃ ) CH ₂ O] _19.8 (CH ₂ CH ₂ O) _n H (m ± n = 9.77) 20% by weight methanol solution 1.0 ml solution L-7 emulsion (Em-1) aqueous solution containing 0.01 mol potassium iodide per mol 200 ml Table 4 shows the characteristics of emulsions (Em-1) to (Em-8). Indicated.

[0113]

[Table 4]

The emulsions (Em-1) to (Em-8) were optimally chemically sensitized. Each of these emulsions was designated as (Emulsion A) and used in the following sample formulation.

Multilayer color photographic light-sensitive material samples 11 to 18 were prepared by sequentially forming layers having the following compositions on the triacetyl cellulose film support from the support side.

Unless otherwise specified, the addition amount indicates the number of grams per 1 m ² . The silver halide and colloidal silver are shown in terms of silver, and the sensitizing dye is shown in the number of moles per mole of silver.

First layer: Antihalation layer Black colloidal silver 0.16 Ultraviolet absorber (UV-1) 0.20 High boiling point organic solvent (Oil-1) 0.16 Gelatin 1.23 Second layer: Intermediate layer Compound (SC-1) 0.15 High boiling point Organic solvent (Oil-2) 0.17 Gelatin 1.27 Third layer; low-sensitivity red-sensitive layer Silver iodobromide emulsion (average grain size 0.38 μm, silver iodide content rate 8.0 mol%) 0.50 Silver iodobromide emulsion (average grain size) 0.27 μm, silver iodide content 2.0 mol%) 0.21 Sensitizing dye (SD-1) 2.8 × 10 ^-4 Sensitizing dye (SD-2) 1.9 × 10 ^-4 Sensitizing dye (SD-3) 1.9 × 10 ^-5 Sensitizing dye (SD- ⁴ ) 1.0 × 10 ^-4 Cyan coupler (C-1) 0.48 Cyan coupler (C-2) 0.14 Colored cyan coupler (CC-1) 0.021 DIR compound (D-1) 0.020 High boiling point Solvent (Oil-1) 0.53 Gelatin 1.30 4th layer; Medium-sensitive red-sensitive layer Silver iodobromide emulsion (average grain size 0.52 μm, silver iodide content 8.0 mol% ) 0.62 Silver iodobromide emulsion (average grain size 0.38 μm, silver iodide content 8.0 mol%) 0.27 Sensitizing dye (SD-1) 2.3 × 10 ^-4 Sensitizing dye (SD-2) 1.2 × 10 ^-4 Sensitizing dye (SD-3) 1.6 × 10 ^-5 Sensitizing dye (SD- ⁴ ) 1.2 × 10 ^-4 Cyan coupler (C-1) 0.15 Cyan coupler (C-2) 0.18 Colored cyan coupler (CC-1) 0.030 DIR compound (D-1) 0.013 High boiling point solvent (Oil-1) 0.30 Gelatin 0.93 Fifth layer; high-sensitivity red-sensitive layer Silver iodobromide emulsion (average grain size 1.0 μm, silver iodide content 8.0 mol% ) 1.27 Sensitizing dye (SD-1) 1.3 × 10 ^-4 Sensitizing dye (SD-2) 1.3 × 10 ^-4 Sensitizing dye (SD-3) 1.6 × 10 ^-5 Cyan coupler (C-2) 0.12 Colored Cyan coupler (CC-1) 0.013 High boiling point solvent (Oil-1) 0.14 Gelatin 0.91 6th layer; Intermediate layer Compound (SC-1) 0.09 High boiling point solvent (Oil-2) 0.11 Gelatin 0.80 7th layer; Low sensitivity green Sensitive layer Silver bromide emulsion (average grain size 0.38 μm, silver iodide content 8.0 mol%) 0.61 Silver iodobromide emulsion (average grain size 0.27 μm, silver iodide content 2.0 mol%) 0.20 Sensitizing dye (SD-4 ) 7.4 × 10 ^-5 Sensitizing dye (SD- ⁵ ) 6.6 × 10 ^-4 Magenta coupler (M-1) 0.18 Magenta coupler (M-2) 0.44 Colored magenta coupler (CM-1) 0.12 High boiling solvent (Oil-- 2) 0.75 Gelatin 1.95 Eighth layer; Medium-sensitive green sensitive layer Silver iodobromide emulsion (average grain size 0.59 μm, silver iodide content 8.0 mol%) 0.87 Sensitizing dye (SD-6) 2.4 × 10 ^-4 increase Dye (SD-7) 2.4 × 10 ^-4 Magenta coupler (M-1) 0.058 Magenta coupler (M-2) 0.13 Colored magenta coupler (CM-1) 0.070 DIR compound (D-2) 0.025 DIR compound (D─ 3) 0.002 High boiling point solvent (Oil-2) 0.50 Gelatin 1.00 9th layer; High sensitivity green sensitive layer Silver iodobromide emulsion (Emulsion A) 1.27 Sensitizing dye (SD-6) 1.4 ^10-4 Sensitizing dye (SD─7) 1.4 × 10 ^-4 Magenta coupler (M─2) 0.084 Magenta coupler (M─3) 0.064 Colored magenta coupler (CM─1) 0.012 High-boiling solvent (Oil─1) 0.27 High boiling point solvent (Oil-2) 0.012 Gelatin 1.00 10th layer; Yellow filter layer Yellow colloidal silver 0.08 Color stain inhibitor (SC-2) 0.15 Formalin scavenger (HS-1) 0.20 High boiling point solvent (Oil-2) 0.19 Gelatin 1.10 11th layer; Intermediate layer Formalin scavenger (HS-1) 0.20 Gelatin 0.60 12th layer; Low sensitivity blue sensitive layer Silver iodobromide emulsion (average grain size 0.38 µm, silver iodide content 8.0 mol%) 0.22 Iodour Silver halide emulsion (average grain size 0.27 μm, silver iodide content 2.0 mol%) 0.03 Sensitizing dye (SD-8) 4.9 × 10 ^-4 Yellow coupler (Y-1) 0.75 DIR compound (D-1) 0.010 High Boiling point solvent (Oil-2) 0.30 Gelatin 1.20 13th layer; Medium sensitivity blue feeling Functional layer Silver iodobromide emulsion (average grain size 0.59 μm, silver iodide content 8.0 mol%) 0.30 Sensitizing dye (SD-8) 1.6 × 10 ^-4 Sensitizing dye (SD-9) 7.2 × 10 ^-5 Yellow coupler (Y-1) 0.10 DIR compound (D-1) 0.010 High boiling point solvent (Oil-2) 0.046 Gelatin 0.47 14th layer; High-sensitivity blue-sensitive layer Silver iodobromide emulsion (average grain size 1.0 μm, iodine Silver halide content 8 mol%) 0.85 Sensitizing dye (SD-8) 7.3 × 10 ^-5 Sensitizing dye (SD-9) 2.8 × 10 ^-5 Yellow coupler (Y-1) 0.11 High boiling solvent (Oil-2) ) 0.046 Gelatin 0.80 15th layer; 1st protective layer Silver iodobromide emulsion (average grain size 0.08 μm, silver iodide content 1.0 mol%) 0.40 UV absorber (UV-1) 0.065 UV absorber (UV-2) ) 0.10 High boiling point solvent (Oil-1) 0.07 High boiling point solvent (Oil-3) 0.07 Formalin scavenger (HS-1) 0.40 Gelatin 1.31 16th layer; 2nd protective layer Alkali-soluble matting agent (average) Diameter 2 μm) 0.15 Polymethylmethacrylate (average particle size 3 μm) 0.04 Sliding agent (WAX-1) 0.04 Gelatin 0.55 In addition to the above composition, coating aid Su-1, dispersion aid Su-2, viscosity adjustment Agent, hardener H-1, H-2, stabilizer ST-1, antifoggant AF-1, weight average molecular weight: 1
Two types of AF-2 with 000 and weight average molecular weight of 1,100,000
And the preservative DI-1 was added. The amount of DI-1 added is 9.
It was 4 mg / m ² .

The structures of the compounds used in the above samples are shown below.

[0119]

[Chemical 1]

[0120]

[Chemical 2]

[0121]

[Chemical 3]

[0122]

[Chemical 4]

[0123]

[Chemical 5]

[0124]

[Chemical 6]

[0125]

[Chemical 7]

These samples were respectively stored under the following two conditions A and B, and then exposed for sensitometry with white light and processed in the following processing steps to obtain sensitivity and RM.
S granularity was evaluated.

(Conditions) A: 40 ° C. under 60% RH for 3 days B: 40 ° C. under 55% RH for 28 days [Processing step (38 ° C.)] Color development 3 minutes 15 seconds Bleaching 6 minutes 30 seconds Washing with water 3 minutes 15 seconds Settling 6 minutes 30 seconds Water washing 3 minutes 15 seconds Stabilization 1 minute 30 seconds Drying The treatment liquid composition used in the treatment process is as follows.

[Color developer] 4-amino-3-methyl-N-ethyl-N- (β-hydroxyethyl) -aniline / sulfate 4.75 g anhydrous sodium sulfite 4.25 g hydroxylamine / 1/2 sulfate 2.0 g Anhydrous potassium carbonate 37.5 g Sodium bromide 1.3 g Nitrilotriacetic acid trisodium salt (monohydrate) 2.5 g Potassium hydroxide 1.0 g Water is added to make 1 liter, and the pH is adjusted to 10.0.

[Bleach] Ethylenediaminetetraacetic acid ammonium salt 100.0 g Ethylenediaminetetraacetic acid diammonium salt 10.0 g Ammonium bromide 150.0 g Glacial acetic acid 10.0 g Add water to make 1 liter, and adjust to pH 6.0 with ammonia water. To do.

[Fixer] Ammonium thiosulfate 175.0 g Anhydrous sodium sulfite 8.5 g Sodium metasulfite 2.3 g Water is added to make 1 liter, and pH is adjusted to 6.0 with acetic acid.

[Stabilizer] Formalin (37% aqueous solution) 1.5 ml Conidax (manufactured by Konica Corporation) 7.5 ml Water is added to make 1 liter.

The sensitivity (S) is the relative value of the reciprocal of the amount of received light that gives a density of fog +0.1, and is the relative value when the green sensitivity of the sample (No. 11) under condition A is 100. Indicated.

The RMS granularity is 1000 times the fluctuation of the density value that occurs when the density of the minimum density +1.0 is scanned by a microdensitometer with an aperture scanning area of 250 μm ² , and the sample under condition A (No. 11) The RMS value is shown as a relative value when the RMS value is 100.

In Table 5, Emulsion A, that is, (Em-1) to (Em-)
The evaluation results of the sensitivity and the RMS granularity of the coated samples (No. 11) to (No. 18) using No. 8) are shown.

[0135]

[Table 5]

From Table 5, samples (No. 13) to (N) using the silver halide photographic emulsions (Em-3) to (Em-8) of the present invention are shown.
o.18), when stored under the condition A, photographic performance equivalent to or higher than that of the sample using the comparative emulsion was obtained in both sensitivity and RMS granularity. Furthermore, even when stored under the more severe condition B, the sample using the silver halide photographic emulsion of the present invention exhibits superior photographic performance in both sensitivity and RMS granularity to the sample using the comparative emulsion. Shows.

Example 2 Multilayer color photographic light-sensitive material samples 11 to 18 prepared in Example 1
Was stored under the following two conditions C and D, and then evaluated in the same manner as in Example 1.

(Conditions) C: 50 ° C. under 80% RH for 4 days D: 50 ° C. under 70% RH for 20 days The evaluation results are shown in Table 6.

[0139]

[Table 6]

From Table 6, samples (No. 13) to (N) using the silver halide photographic emulsions (Em-3) to (Em-8) of the present invention are shown.
o.18), when stored under the condition C, photographic performance equivalent to or higher than that of the sample using the comparative emulsion was obtained in both sensitivity and RMS granularity. Further, when stored under the more severe condition D, the sample using the silver halide photographic emulsion of the present invention exhibits superior photographic performance in both sensitivity and RMS granularity to the sample using the comparative emulsion. Shows.

[0141]

According to the present invention, a silver halide photographic emulsion capable of providing a silver halide photographic light-sensitive material having high sensitivity and excellent graininess even after long-term storage after production and a silver halide using the same. A photographic light-sensitive material can be provided.

Claims (3)

[Claims] 1. The tabular silver halide grains account for 50% or more of the total projected area of the silver halide grains contained in the silver halide emulsion, and the tabular silver halide grains contain a high silver iodide content therein. The tabular silver halide grains have a rate of 50% or more (the number) and the tabular silver halide grains have 10 or more dislocation lines per grain. In a slice plane that passes through the center of the grain in the silver halide grain and is perpendicular to the two parallel principal planes, let D be the distance between the two parallel principal planes, and pass through the center of the grain and in the direction parallel to the principal plane. When the distance between two surfaces facing each other is L, the average silver iodide content a in the region where the distance from the straight line passing through the center of the grain and parallel to the main plane is 9D / 20 or more, and the grain A distance of 9L / 20 or more from a straight line passing through the center of and perpendicular to the main plane. The average and the silver iodide content b of |
(A−b) /a|≦0.15 A silver halide photographic emulsion containing silver halide grains. 2. The average silver iodide content on the surface of silver halide grains is 4 mol% or less, and the tabular silver halide grains have two twin planes parallel to the principal plane. The silver halide photographic emulsion according to claim 1. 3. A silver halide photographic light-sensitive material having at least one silver halide emulsion layer on a support,
A silver halide photographic light-sensitive material, characterized in that at least one layer of the silver halide photographic emulsion contains the silver halide photographic emulsion according to claim 1.