JPH0444030A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To prevent light piping phenomenon without degrading transparency by specifying the surface refractive index of a plastic film to <=1.60. CONSTITUTION:The photographic sensitive material is produced generally by coating the surface of the plastic film base with at least one layer of photographic sensitive layers. The surface refractive index of this plastic film is specified to <=1.60. The plastic film having <=1.60 surface refractive index refers to the film in which the refractive indices in the plane and thickness directions of the film are both <=1.60. The distance at which light arrives from the film edge by the light piping is shorter as the refractive index of the film is more approximate to the refractive index of the film. The film is usable with substantially no harms, insofar as the refractive index is <=1.60 when the thickness is 100mum and the film is used as a rolled negative film. The light piping phenomenon is prevented in this way without degrading the transparency and the photographic performance is not impaired at all.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a silver halide photographic light-sensitive material, and more particularly to a silver halide photographic light-sensitive material which prevents light piping phenomenon.

BACKGROUND OF THE INVENTION Photographic materials are generally produced by coating at least one photographically sensitive layer on a plastic film support. This plastic film is generally made of a fibrous polymer represented by triacetylcellulose (hereinafter referred to as rTAcJ) or a polyester type polymer represented by polyethylene terephthalate (hereinafter referred to as (PET)).

Conventionally, PET film has excellent productivity, mechanical strength,
It has also been considered to be a substitute for TAC due to its dimensional stability, but in roll form, which is widely used as a photographic material, there is a problem of edge fogging due to its high refractive index. Polyester polymers such as triacetylcellulose (TAC) and polyethylene terephthalate (PET) are commonly used as photographic supports;
One of the major differences in optical properties between C and PET is the refractive index. This refractive index is about 1.66 for PET, whereas T
AC is small at 148. On the other hand, gelatin, which is commonly used in subbing layers and photographic emulsion layers, has a refractive index of 1.53.
The ratio of the refractive index of gelatin is 1.53/1.66 for PET, which is smaller than 1, and when light enters from the film edge, it is easily reflected at the interface between the base and the emulsion layer. Therefore, a polyester film causes a so-called light vibration phenomenon (edge fog).

Known methods for avoiding such a light piping phenomenon include a method in which the film contains inert inorganic particles, a method in which a dye is added, and the like.

[Problems to be Solved by the Invention] However, PET film has a disadvantage that its transmittance is lower than that of TAC film, and it is not desirable to add dyes or pigments, even if it is to prevent light piping. It has been desired to prevent the light piping phenomenon by other means if possible.

An object of the present invention is to provide a silver halide photographic light-sensitive material using a polyester film as a support which prevents the light piping phenomenon without adding dyes or pigments, that is, without reducing transparency. .

[Means for Solving the Problems] In order to achieve the object 1, the present invention provides a photosensitive material in which a silver halide photographic emulsion is coated on a plastic film, the plastic film having a surface refractive index of 160.
It is characterized by the following:

The present invention will be explained in detail below.

In the present invention, a plastic film having a surface refractive index of 160 or less refers to a film whose refractive index in both the plane direction and the thickness direction is 160 or less as measured using an Arahe refractometer.

The distance that light travels from the film edge through light piping becomes shorter as the refractive index of the film approaches that of gelatin. Since the refractive index of gelatin is about 153, it is preferable that the refractive index of the film is also about 153, but as a result of study, when used as a rolled negative film with a thickness of 100 μm, if the refractive index of the film is 1.60 or less It turns out that it can be used almost without any real harm. Therefore, the refractive index of the film in the present invention must be 160 or less, preferably 151 to 1.57.

The polyester used in the present invention includes aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid, and naphthalenedicarboxylic acid, and/or 14-cyclohexanedicarboxylic acid, 1°3-cyclohexanedicarboxylic acid, and 1,2-cyclohexanedicarboxylic acid. acids, alicyclic dicarboxylic acids such as 13-cyclopentanedicarboxylic acid, 4,4'-bicyclohexyldicarboxylic acid, and/or aliphatic dicarboxylic acids such as adipic acid, pimelic acid, superric acid, azelaic acid, sebacic acid, or Combining the ester-forming derivative with glycols such as ethylene glycol, 1,3-propanediol, 1,4-butanediol, neopentyl glycol, 1,4-cyclohexane dimetatool, diethylene glycol, l-diethylene glycol, and polyethylene glycol. Examples of condensate polymers include polyethylene terephthalate, polyethylene 2,6-dinaphthalate, polypropylene terephthalate, polybutylene terephthalate, and copolymers thereof.

In the present invention, the refractive index of the polyester film is 160.
As the first means below, an aromatic dicarboxylic acid or an ester thereof in which a part of the acid component forming the polyester is substituted with isophthalic acid, phthalic acid, adipic acid or a derivative thereof, preferably a sulfonic acid metal salt; This can be achieved by copolymerizing with a forming derivative.

Specifically, 5-sodium sulfoisophthalic acid, 2-
Mention may be made of sodium sulfoterephthalic acid, 4-sodium sulfophthalic acid, 4-sodium sulfo-2,6-naphthalene dicarboxylic acid, and compounds in which sodium is replaced with other metals, such as potassium and lithium.

The copolymerization ratio is 2 to 15 mol%, preferably 4 to 10 mol%, based on the terephthalic acid component, which is the main raw material. It is also preferable to copolymerize 5 to 50 mol% of isophthalic acid.

The copolymerized polyethylene terephthalate film used in the present invention is further copolymerized with an aliphatic dicarboxylic acid component having 4 to 20 carbon atoms, which improves transparency, especially suppression of whitening on the surface of the copolymerized polyethylene terephthalate film, and folding durability. It is preferable from the point of view.

Specific examples of the aliphatic dicarboxylic acid component having 4 to 20 carbon atoms include succinic acid, adipic acid, and sebacic acid, with adipic acid being particularly preferred.

The copolymerization ratio of the aliphatic dicarboxylic acid component having 4 to 20 carbon atoms is preferably 3 to 2 with respect to the terephthalic acid component.
5 mol%, particularly preferably 5 to 20%.

In addition, in the polyester film of the present invention, it is also possible to further copolymerize other acid components or glycol components as long as the proportion is small within a range that does not impair transparency and mechanical properties. For example, 0 to 10% by weight of polyalkylene glycol, especially polyethylene glycol, can be copolymerized. The molecular weight of the polyalkylene glycol used for this purpose is 600 to 10,
Preferably, it is 000.

It is also possible to blend copolymerized polyester and PET. The blending ratio can be arbitrarily set so that the refractive index of the molded film is 1.60 or less.

The surface refractive index of the second polyester film is 160
The following method can be achieved by laminating a copolyester copolymerized with isophthalic acid or sulfoisophthalic acid on a PET film.

Lamination methods include a method of laminating during melt extrusion using multiple extruders and coextrusion dies, a method of laminating at any point in the film forming process, that is, an unstretched film melt extruded, a film uniaxially stretched in the longitudinal or transverse direction, a film uniaxially stretched in the longitudinal or transverse direction, Alternatively, a method may be used in which a copolyester is melt-extruded or a previously formed copolyester film is laminated on either a transversely biaxially stretched film. The copolyester film to be laminated may have a laminated structure. Further, adhesive may be used for bonding. Further, it is preferable to subject the PET film before lamination to a pretreatment such as flame treatment, corona discharge treatment, glow discharge treatment, or etching treatment.

Of these, when laminating on a PET film after biaxial stretching, it is difficult to make the film thickness uniform if the [1] of the film is wide, so biaxial stretching is completed after laminating on an unstretched or uniaxially stretched film. So-called in-line lamination is preferred.

The surface refractive index of the third polyester film is 160
The following means can be achieved by adjusting the polyester film forming process within specific conditions. That is, by relatively increasing the temperature of longitudinal stretching and/or transverse stretching,
This can be achieved by relatively lowering the stretching ratio and relatively lowering the heat setting temperature.

As a means for forming the film, a method can be used in which the film is melt-extruded, closed in an unstretched sheet, stretched sequentially or simultaneously in the longitudinal and/or transverse directions, and further heat-set. Although the stretching ratio is not particularly limited, it is usually about 2.0 to 50 times, and the stretching temperature is preferably about 70 to 160°C. Heat fixing temperature is 16
0-240°C is preferred.

The thickness of the support film can be 30 to 500 μm, preferably 40 to 150 μm.

In the support film of the present invention, other commonly used additives such as antioxidants, UV
Absorbers, dyes, pigments, plasticizers, antistatic agents, lubricants such as inert inorganic particles can be added.

The polyester film of the present invention can be previously subjected to various surface treatments such as corona discharge treatment, chemical treatment, flame treatment, etc., as necessary, in order to improve adhesiveness and wetting characteristics of coating liquid.

Among these surface treatments, corona discharge treatment is most preferably used in the present invention because it causes less precipitation of low polymers on the film surface.

The polyester support of the present invention preferably has a subbing layer in order to increase adhesion to a photographic layer such as a photosensitive layer coated thereon.

The subbing layer may include a subbing layer using a polymer latex made of a styrene-butadiene copolymer, a vinylidene chloride copolymer, or a polyester copolymer, a subbing layer using a hydrophilic binder such as gelatin, and a hydrophilic subbing layer. There is also a subbing layer coated with copolyester as an aqueous solution.

The subbing layer preferably used in the present invention is a subbing layer using a hydrophilic binder.

Examples of the hydrophilic binder used in the present invention include water-soluble polymers, cellulose esters, latex polymers, and water-soluble polyesters.

Examples of water-soluble polymers include gelatin, gelatin derivatives,
Casein, agar, sodium alginate, starch, polyvinyl alcohol, polyacrylic acid copolymer, maleic anhydride copolymer, etc. Cellulose esters include carboxymethyl cellulose, hydroxyethyl cellulose, etc. Examples of the latex polymer include vinyl chloride-containing copolymers, vinylidene chloride-containing copolymers, acrylic acid ester-containing copolymers, vinyl acetate-containing copolymers, butadiene-containing copolymers, and the like. Among these, gelatin is most preferred.

As a compound that swells the support used in the present invention,
Resorcinol, chlorresorcinol, methylresorcinol, 0
Examples include -cresol, m-cresol, p-cresol, phenol, 0-chlorophenol, p-chlorophenol, dichlorophenol, trichlorophenol, monochloroacetic acid, dichloroacetic acid, trifluoroacetic acid, and chloral hydrate. Preferred among these are resorcinol and p-chlorophenol.

Various gelatin hardeners can be used in the subbing layer of the present invention.

Chromium salts (such as chromium alum) as gelatin hardeners
, aldehydes (formaldehyde, geltaraldehyde, etc.), incyanates, active halogen compounds (
2,4-dichloro-6-hydroxy-s-triazine), epichlorohydrin resin, and the like.

In the subbing layer of the present invention, inorganic fine particles such as SiO2 and TiO2 or polymethyl methacrylate copolymer fine particles (
1 to 10 μm) as a matting agent.

At least one light-sensitive silver halide photographic emulsion layer is coated on the film support of the present invention. In this case, if necessary, a surface activation treatment such as corona discharge and/or a subbing layer can be applied prior to coating the photosensitive silver halide photographic emulsion layer.

Regarding coating methods for light-sensitive silver halide photographic emulsion layers, extrusion coating and curtain coating, which allow two or more layers to be coated simultaneously, are particularly useful. Further, the coating speed can be arbitrarily selected, but from the viewpoint of productivity, a speed of 50 m/min or more is preferable.

The photographic element of the present invention can be applied to any photographic element that uses a support, for example, there are no limitations such as black and white or color, and the photographic constituent layers include a light-sensitive silver halide photographic emulsion layer, an intermediate layer, etc. , protective layer, filter layer, back coat layer, etc., and the layer order thereof is not particularly limited and can be applied.

The light-sensitive silver halide photographic emulsion layer in the present invention is a normal silver halide emulsion layer, such as silver chloride, silver bromide, silver chlorobromide, silver iodobromide, silver chloroiodobromide emulsion, etc. can be preferably used. Additionally, this layer can contain a coupler for creating a color image, and it is also possible to contain a hydrophilic polymeric substance other than gelatin as a binder, such as polyvinyl alcohol, polyvinylpyrrolidone, etc. It is. Furthermore, the silver halide emulsion layer in item 1 can be sensitized in the wavelength range to which it is sensitive by cyanine dyes, merocyanine dyes, etc., and may also contain various other photographic additives, such as anti-capri agents, gold, sulfur, etc. Chemical sensitizers, hardeners, antistatic agents, and the like can be preferably added. Therefore, the present invention is effective regardless of whether the photographic element of the present invention is developed in black and white or in color.

[Example] Hereinafter, specific examples of the present invention will be described.

Example-1 70 parts by weight of dimethyl terephthalate, 22 parts by weight of dimethyl isophthalate, 8 parts by weight of dimethyl 5-sl·lium sulfoisophthalate, 40 parts by weight of ethylene glycol, 30 parts by weight of diethylene glycol, 0.1 part by weight of calcium acetate. , 1 part by weight of manganese acetate was added to 1 part by weight under a nitrogen stream.
After carrying out the transesterification reaction while distilling off methanol at 70 to 220°C, 0.05 parts by weight of trimethyl phosphate and 0.05 parts by weight of antimony trioxide were added, and the temperature and pressure in the system was gradually increased to reduce the final temperature. temperature at 280°C, 0.2mmT (g
After polycondensation was carried out for 3 hours, it was molded into a pellet shape.

The obtained copolyester had an intrinsic viscosity (IV) of 0.55.

After vacuum drying the obtained copolyester pellets, 2
An unstretched sheet with a thickness of 800 μm was prepared by melt extrusion at 90° C.

This sheet was heated 35 times in the vertical direction at 100℃ and 11 times in the horizontal direction.
The film was stretched 33 times at 0°C, heat-set at 210°C for 10 seconds, and then cooled to obtain a biaxially stretched film with a thickness of 70 μm.

The refractive index of this film was 157 as measured using an Atsabe refractometer manufactured by Atago.

(Coating of subbing layer) After corona discharge treatment was applied to both sides of this film, a subbing layer having the following composition was provided. The degree of corona discharge treatment is 0.02
It was KVA・minute/bo.

gelatin 3g distilled water
250 cc Formaldehyde 0.02 g (Coating of back layer) After subbing, a back layer having the following composition was coated on one side of the film.

[Preparation of tin oxide-antimony oxide composite dispersion] 230 parts by weight of stannic chloride hydrate and 23 parts by weight of antimony trichloride were dissolved in 3000 parts by weight of ethanol to obtain a homogeneous solution. An aqueous solution of IN sodium hydroxide was added dropwise to this solution until the pH of the solution became 3 to obtain a coprecipitate of colloidal stannic oxide and antimony oxide. The obtained coprecipitate was left at 50° C. for 24 hours to obtain a reddish brown colloidal precipitate.

A reddish-brown colloidal precipitate was separated by centrifugation. In order to remove excess ions, water was added to the precipitate and the precipitate was washed with water by centrifugation. This operation was repeated three times to remove excess ions.

200 parts by weight of the colloidal precipitate from which excess ions have been removed are redispersed in 1500 parts by weight of water and sprayed onto a calcination source heated to 600°C to form fine particles of a tin oxide-antimony oxide composite with a bluish average particle size of 02μ. A powder was obtained. The specific resistance of this fine particle powder was 25 Ω·cm.

A mixed solution of 40 parts by weight of the above fine particle powder and 60 parts by weight of water is
After adjusting to H7.0 and coarsely dispersing with a stirrer, use a model sand mill (trade name: Dynomil; WILLY A).

It was prepared by dispersing it in BACJ (manufactured by OFEN AG) until the residence time reached 30 minutes.

The following formulation [A] was applied so that the dry film thickness was 0.3μ, and dried at 130°C for 30 seconds. Further, the following coating layer coating solution (B) was coated onto this to give a dry film thickness of 0.1 μm, and dried at 130° C. for 2 minutes.

[Formulation A] Conductive fine particle dispersion 10 parts by weight Gelatin 1 part by weight Water
27 parts by weight methanol
60 parts by weight resorcinol
2 parts by weight [Coating liquid for coating layer (B)] 10 parts by weight of gelatin 008 parts by weight of sodium dodecylbenzenesulfonate 89 parts by weight of water (coating of photographic layer) The following was applied to the opposite side of the film provided with the back layer as described above. Photographic layers such as the following were sequentially provided.

The amount added in a silver halide photographic light-sensitive material indicates the number of grams per 1 d unless otherwise specified. In addition, silver halide and colloidal silver are shown in terms of silver.

1st layer; antihalation layer (HC'-1) black colloidal silver 0.20 ultraviolet absorber (UV-1
) 0.20 high boiling point solvent (O1l-1)
0.20 Gelatin 13 2nd layer; Intermediate layer (TL-1) Ultraviolet absorber (UV-1) 0.01 High boiling point solvent (Oil-1) 0.01 Gelatin
13 Third layer, low sensitivity red-sensitive emulsion layer (RL) Silver iodobromide emulsion (Em-1) 0.9 Silver iodobromide emulsion (Em-2) 0.6 Sensitizing dye (S-1) 2. 5X10-' (mol/mol silver) sensitizing dye (12
) 2.5X10-' (mol/silver 1 mol) sensitizing dye (S-
3) 0.5X10' (mol/silver 1 mol) cyan coupler (Co-1) 1.0 colored cyan coupler (
CC-1) 0.05 DIR compound (D-1) 0.002 High boiling point solvent (Oil-1) 0.5 Gelatin
14 4th layer; High sensitivity red-sensitive emulsion layer (RH) Silver iodobromide emulsion (Em-3) 2.0 sensitizing dye (
S-1) 2.0X10-' (mol/silver 1 mol) sensitizing dye (S-
2) 2.0X10-' (mol/silver 1 mol) sensitizing dye (S-
3) o, 1xio-' (mol/silver 1 mol) Cyan coupler (Co-1) 0.25 Colored cyan coupler (CC-1) DIR compound (D-2) 0.05 High boiling point solvent (Oil-1) 0.3 gelatin
14 5th layer: Intermediate layer (IL-2) Gelatin o5 6th layer: Low-sensitivity green-sensitive emulsion layer (GL) Silver iodobromide emulsion (Em-1) 1.0 sensitizing dye (
S-'4) 5X10-' (mol/1 mole of silver) Sensitizing dye (S-5) IXIO-' (mol/1 mole of silver) Magenta coupler (Mo-1) 0.5J Colored magenta coupler (CM-1 ) 0.01 DIR compound (D-3) 0.02 DIR compound (D-4) 0.02 High boiling point solvent (Oil-
2) 0.4 gelatin
10 7th layer: Intermediate layer (IL-3) Ceratin 07 8th layer: High-sensitivity green-sensitive emulsion layer (GH) Silver iodobromide emulsion (Em-3) 1.3 Sensitizing dye (
S-6) 1.5X10-' (mol/silver 1 mol) sensitizing dye (S-
7) 2.5X 10-', (mol/mol silver) sensitizing dye (
S-8) 0.5X10-' (mol/mol of silver) Magenta coupler (Mo-2) 0.05 Magenta coupler (Mo
-3) 0.15 colored magenta coupler (CM
-2) DIR compound (D-3) 0.01 High boiling point solvent (Oil-3) 0.5 Gelatin
1.0 9th layer; Yellow filter layer (yc) Yellow colloidal silver 01 Color stain inhibitor (SC-1) 0.1 High boiling point solvent (
Oil-3) 0.1 gelatin
08 10th layer; Low sensitivity blue-sensitive emulsion layer (BL) Silver iodobromide emulsion (Em-1) 0.25 Silver iodobromide emulsion (Em
-2) 0.25 sensitizing dye (S-10) 7X10-' (mol/1 mol of silver) Yellow coupler (Yo-1) 0.5 yellow coupler (Yo-2) 0.1 DIR compound CD-2
) 0.01 high boiling point solvent (Oil-3)
0.3 Gelatin 09 11th layer; Highly sensitive blue-sensitive emulsion layer (BH) Silver iodobromide emulsion (
Em-4) 0.4 12th layer silver iodobromide emulsion (Em-1) 0.3 Sensitizing dye (
S-9) IXIO-' (mol/mol of silver) Sensitizing dye (S-10) 3X10' (mol/mol of silver) Yellow coupler (Yo-1) 0.30 Yellow coupler (Yo-2) 0. 05 High boiling point solvent (
Oil-3) 0.1 gelatin
1°; First protective layer (PRO-1) Fine grain silver iodobromide emulsion o4 (average grain size 0.08μ AgI 2 mol%) Ultraviolet absorber (UV-1) 0.10 Ultraviolet absorber (Uv
-2) o, o5 5 High-boiling solvent (Oil-1) 0.1 High-boiling solvent (Oil-4) 0.1 Formalin scavenger (H8-1) Formalin scavenger (H3-
2) Gelatin 10 13th layer; 2nd protective layer (PRO-2) Surfactant (S u -1) 0.005 Polymethyl methacrylate matting agent (average particle size 3 μm) 0.13 Gelatin 06 In each layer In addition to the above composition, coating aid Su1, dispersion aid 5u-2, hardening agents H-1, H-2, H-3, stabilizer Stab-1, and antifoggant AF1 were added.

Em-1 average particle size 0.43μm Silver iodobromide content 9.0 mol% (Uniform) monodisperse silver iodobromide emulsion Em-2 average particle size 0.32μm Silver iodobromide content 20 mol% (Uniform) monodisperse silver iodobromide emulsion Em-3 average particle size 0.78μm Silver iodobromide content 60 mol% (Uniform) monodisperse silver iodobromide emulsion Em-4 average particle size 1, 1 μm Silver iodobromide content 90 mol% S-6 M.

o-3 11I 2H5 2'2 Cθ 2H5 O o-2 c- i M-1 0M-2 D V-1 IV-2 u-2 S S -2 [(CH,=CH8O2CH2), CCH25O, (C
H2)2], N(CH2), SO, Ktab-1 ○Na CH2=CH3O2CH20CH2S○2CH=CH2
u CHCOOCH2(CF 2 CF 2 ) 3 HN
aO=S CH=COOC1(2(CF2CF2)
, H3P c 1 P-1 The color negative film thus obtained was 35 m /
It was cut into m size and loaded into a cartridge.

After being left at 40°C for 10 days, it was photographed using a normal camera and developed as follows.

Processing steps (38°C) Color development 3 minutes 15 seconds bleaching 6 minutes 30 seconds washing 3 minutes 15 seconds fixing 6 minutes 30 seconds washing 3 minutes 15 seconds stabilization 1 minute 30 seconds drying The composition of the processing solution used in each processing step is as follows. It is as follows.

[Color developer] Anhydrous sodium sulfite 425g Hydroxylamine 1/2 sulfate 2.0g Anhydrous potassium carbonate 375g Sodium bromide 1.3g Potassium hydroxide 1.0g Add water to make ip.

[Bleach solution] Ethylenediaminetetraacetic acid iron ammonium salt 100.0g Ethylenediaminetetraacetic acid diammonium salt 10.0g Ammonium bromide 150.0g Glacial acetic acid 100m! Add water 1
and adjust the pH to 6.0 using aqueous ammonia.

[Fixer] Ammonium thiosulfate 175.0g Anhydrous sulfur sulfite 8.5g Sodium metasulfite 2.3g Water is added to make one volume, and the pH is adjusted to 6.0 using acetic acid.

[Stabilizer] Formalin (37% aqueous solution) 1.5m Cuconidax (manufactured by Konica) Add 7.5J water and 1! shall be.

When the developed film was inspected, no edge fog due to light piping was observed.

There were also no abnormalities in other photographic performance such as sensitivity and gradation.

Example 2 After longitudinal stretching in the PET film forming process, the copolyester polymerized in Example 1 was melt-extruded and laminated on both sides with a thickness of 30 μm onto a uniaxially stretched PET film having a thickness of 150 μm before horizontal stretching.

After this laminated film was laterally stretched 3.0 times at 110°C,
After heat fixing at 10° C., it was cooled and rolled up.

The thickness of the obtained composite film was 70 μm, and the surface refractive index was 157.

When a color negative film was prepared from this film in the same manner as in Example-1, the same effects as in Example-1 were obtained.

Example 3 A PET chip with an IVo of 65 was dried at 1606C1 mmHg and then melt-extruded at 280°C to form an unstretched film with a thickness of 600 μm. Then turn this sheet vertically to 11
It was stretched 2.8 times at 0° C., then 26 times in the transverse direction at 130° C., then heat-set at 17° C., cooled, and rolled up.

The obtained film has a thickness of 80 μm and a surface refractive index of 1.59.
was.

When a color negative film was prepared from this film in the same manner as in Example 1, similar effects were obtained.

[Effects of the Invention] As explained in detail above, according to the present invention, a silver halide photograph can be produced which can prevent the light piping phenomenon without reducing transparency, and which does not impair photographic performance in any way. A photosensitive material can be provided.

Claims (1)

[Claims] 1. A silver halide photographic material comprising a plastic film coated with a silver halide photographic emulsion, the plastic film having a surface refractive index of 1.60 or less.