JPH0287138A - Silver halide photographic sensitive material preventing generation of curl - Google Patents

Abstract

PURPOSE:To obtain a silver halide photographic sensitive material having improved transportability being prevented from generation of curl and having improved blocking resistance by forming a silver halide emulsion layer to one side of a base body and a backing layer to another side of the base body. CONSTITUTION:The silver halide photographic sensitive material has at least one silver halide emulsion layer on one side of the base body and the backing layer on another side of the base body. A ratio of a total amt. of a binder per unit area at the side having the silver halide emulsion layer to the total amt. of the binder per unit area for the side having the backing layer is regulated to >=0.7 to <=1.4, >=1.0X10-<3>g to <=2.0g polyhydric alcohol having at least 2 OH groups per 1g binder is contained in one of the sides. Further, a latex polymer is contained in the side having the backing layer. By this constitution, a silver halide photographic sensitive material prevented from generation of curl and improved in blocking characteristic is obtd. The material improves transportability in automatic transportation, etc.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a silver halide photographic light-sensitive material, and in particular, it has at least one silver halide emulsion layer on one side of a support, and a silver halide emulsion layer on the other side. The present invention relates to a silver halide photographic material having a backing layer.

[Conventional technology]

A photosensitive material having a silver halide emulsion layer on one side of a support and a backing layer on the other side tends to be curved because the composition on each side is not the same.

In this specification, the term "backing layer" refers to a non-photosensitive hydrophilic colloid layer formed on the side opposite to the side having the silver halide emulsion layer.

That is, in a light-sensitive material having silver halide emulsion layers on both sides of a support, the layers on both sides can have the same composition (for example, linear X-ray light-sensitive materials often have this structure); Since the balance can be maintained, curvature can be suppressed. Alternatively, even if there is a risk of bending, various conventional techniques (for example, Japanese Patent Application Laid-Open No. 54-5681
This can be handled by the technology described in Publication No. 7).

However, photosensitive materials that have a silver halide emulsion layer on one side and a backing layer on the other side, so-called single-sided photosensitive materials, have different compositions on each side.
It is not always possible to maintain a balance between the two sides, and curvature often occurs due to various factors.

In addition, before exposure, the photosensitive material is sometimes stored or transported by sandwiching it between so-called "scissors," but since the scissors are hygroscopic, they are not packaged. In particular, additives contained in the photosensitive material that is in contact with the scissors (the first photosensitive material in the case of multiple photosensitive materials) are transferred to the scissors along with moisture, and The wetting agent in the ingredients on the surface side transfers to the scissors, resulting in imbalance on both sides (misalignment, curvature, etc.).
Or help may be provided.

There are several inconveniences associated with curvature, but one important example is that it causes transportation failure when transported by an automatic transport device. In the case of single-sided photosensitive materials, the emulsion side (
Refers to the side that has a silver halide emulsion layer. same as below)
A curved one with the emulsion side on the inside is called a positive curl, and a curved one with the emulsion side on the outside is called a negative curl. When automatically conveyed, if the degree of curl is within the range of +1.5 to -1.5, it will be conveyed. The quality is almost good. Furthermore, the smaller the degree of curl, the smaller the rate of transport defects.Also, when taking CR7 images with an imaging camera, negative curl becomes a big problem. The flatness of the photosensitive material is forcibly maintained by the guide of the conveyance system inside, but if the photosensitive material is negatively curled, the flatness cannot be maintained, and the distance from the CR7 image changes, resulting in an out-of-focus condition, which makes it difficult to take pictures. The image becomes blurred or distorted.In order to prevent such phenomena from occurring, it is necessary to keep the negative curl within the range of θ to 0.5.

In this specification, the "curl degree" of a photosensitive material is defined as follows. That is, when a sheet-shaped photosensitive material is curved, the first
The state is as illustrated in the figure, where the reciprocal of the radius of curvature r (unit: meters) from the center of curvature O is defined as the curvature, and this curvature is defined as the degree of curl of the photosensitive material.

On the other hand, if the photosensitive materials have poor stick resistance, the photosensitive materials may adhere to each other and two or more sheets of photosensitive materials (films) may be automatically conveyed at the same time. Therefore, in order to improve transportability, it is important to not only reduce the degree of curl but also improve the scratch resistance.

[Purpose of the invention]

The object of the present invention is to solve the problems of the prior art described above, to prevent the occurrence of curvature, and to improve the scratch resistance.
For example, it is an object of the present invention to provide a silver halide photographic material that has good transportability during automatic transport.

[Means and actions for solving the problems] In order to achieve the above object, in the present invention, one side of the support has a small (one silver halide emulsion layer) and the other side has a silver halide emulsion layer. In a silver halide photographic material having a backing layer, the ratio of the total amount of binder per unit area on the side having the backing layer to the total amount of binder per unit area on the side having the silver halide emulsion layer is 0.7. or more, and 1.4 or less, and at least one of the above (!Ij D, 1.OXlo-
It has a structure characterized in that it contains 3 g to 2.0 g of a polyhydric alcohol having at least two hydroxyl groups, and the side having the backing layer contains a Latinx polymer.

The present invention will be explained in more detail below.

The silver halide photographic material of the present invention is a so-called single-sided light-sensitive material having at least one silver halide emulsion layer on one side of a support and a backing layer on the other side.

On the emulsion surface, a single silver halide emulsion layer or a plurality of silver halide emulsion layers may be formed. It is optional to provide layers other than the silver halide emulsion layer, such as an intermediate layer, a protective layer, etc., on the emulsion surface. Preferably, a protective layer is provided above the silver halide emulsion layer. The protective layer, top layer, and other layers may contain a matting agent.

In the present invention, the backing layer is a non-photosensitive hydrophilic colloid layer formed on the side opposite to the side having the silver halide emulsion layer, and the backing layer may be one layer or two layers.
It may be formed in more than one layer.

As the hydrophilic colloid constituting the backing layer, any of various wood-philic colloids can be used, but gelatin is typically preferably used. As gelatin, in addition to lime-treated gelatin, acid-treated gelatin, oxygen-treated gelatin, gelatin hydrolysates, oxygen-decomposed products, and other gelatin derivatives can be used. In addition, hydrophilic colloids that can be used as binders for photographic materials can be used as appropriate.

In carrying out the present invention, an emulsion for constituting a silver halide emulsion layer can be formed by dispersing photosensitive silver halide in a suitable binder. Examples of the binder that can be used in this case include those exemplified as the hydrophilic colloid for forming the backing layer.

For the purpose of improving the physical properties of the layer containing hydrophilic colloids,
It is preferable to use various film property improvers, such as hardeners, if necessary.

In the present invention, the total binder per unit area on the emulsion side, that is, on the side having a silver halide emulsion layer, is Bec
, where Bbc is the total amount of binder per unit area on the side having the backing layer, Bbc/Bec=0.7 to 1
．． It is in the range of 4. More preferably, Bbc/Bec=
It is in the range of 0.8 to 1.25. The amount of binder per unit area on each side is obtained by dividing the total binder on each side by the applicable area of each side.

Next, in the silver halide photographic light-sensitive material of the present invention, at least either the emulsion side or the side having the backing layer contains 1, 10-3 g of Ox per 1 g of binder.
Contains 2.0 g or less of a polyhydric alcohol having at least two hydroxyl groups.

Preferably, the polyhydric alcohol is contained on both the emulsion side and the backing layer side.

Here, the binder refers to protective colloids forming the backing layer and other layers (for example, the total amount of gelatin and Latinx polymer) on the side with the backing layer, and on the emulsion side, it refers to the halogenated A binder (such as gelatin) used to form a silver emulsion layer and other layers.

The polyhydric alcohol having at least two hydroxyl groups is 1. Ox 10-"g to 2.0g may be contained, and the content is preferably 1.OX 10-"g to 1.0g, more preferably 5.0g per 1g of binder. OX 10-''g to 5.0g.

When containing a polyhydric alcohol having at least two hydroxyl groups, it is preferable to use a polyhydric alcohol with a melting point of 40°C or more and a polyhydric alcohol with a melting point of less than 40°C in combination, and the mixing ratio thereof is arbitrary. However, it is particularly preferable to use them together in a weight ratio of 5:1 to 1:5.

Specific examples of polyhydric alcohols that can be used in the present invention are listed below, but it goes without saying that the polyhydric alcohols that can be used are not limited to these compounds. In addition, the melting point of each polyhydric alcohol is also recorded.

Compound example selection
■]-1,2,3,3,4-tetramethyl-2,4-bentanediol 762.2.2
-dimethyl-1,3-propanediol 126-1283.2.
2-dimethyl-1,3-pentanediol 60-634, 2
, 2.4-1-limethyl-1,3-bentanediol 525.2.
5-hexanediol 43-442.5-dimethyl-2,5-hexanediol 1.6-hexanediol 1.8-octanediol 1,9-nonanediol 1.10-decanediol 1.11-undecanediol 1. 12-dodecanediol 1.13-tridecanediol 1.14-tetradecanediol 1.12-octadecanediol 1.18-octadecanediol cis-2,5-dimethyl-3-hexene-2,5-diol trans-2, 5-dimethyl-3 hexene-2,5-diol 2-butyne-1,4-diol 2,5-dimethyl-3-hexyne-2,5-diol 2,4-hexadiyne-1,6 92-93 72 〜74 62〜62.5 79〜79.5 76.4〜76.6 83〜85 66〜67 96〜98 22゜23゜24゜25゜26゜27゜28゜29゜30゜31゜32゜33゜Diol 111-1122.6-
Octadiyne-1,8-diol 88.5-89.52-
Methyl-2,3,4-butanetriol 492,3.4-
Hexanetriol about 472.4-dimethyl-2
,3,4-Pentanetriol 992.4-Dimethyl-2,3,4 Hexanetriol 75 Pentamethylglycerin 116-1172-Methyl-2-oxymethyl 1,3-propanediol 1992-Isopropyl-2-oxymethyl-1 ,3-propanediol 832.2-
Dihydroxymethyl-1 Butanol 58 Erythritol 126D-Trait 88L-Trait
88-89rac-Trayisoto
72 Pentaerythritol 260
~2651, 2.3.4-Pentanetetrol 1
062, 3.4.5-hexanetetrol 1622
．． 5-dimethyl-2,3,4,5-hexanetetrol 153-154L 2+
5.6-hexanetetrol 95L 3.4.
5-hexanetetrol 881,6-(erythro-3,4) hexanetetrol 121-1223-hexene-1,2,5,6 tetrol 80-823-hexene-1,2,5,6 tetrol 113-114 .5 Adonitol 102D-arabitol 102L-arabitol
102rac-arabitol
105 Xylitol 93-94.5
Mannitol 16450,
Dulcitol 188.5-189
51, diethylene glycol -75
2,1,4 butanediol 1653
．． 2.2-dimethyl-1,3 propenediol 1054, 1
, 2.6-hexanetriol -2゜55,
Glycerin 18.256.2.
4-dimethyl-2,4bentanediol 757, ethylene glycol-12.6, etc.

The polyhydric alcohol may be added at any time, but it is preferably added to the silver halide emulsion between after chemical sensitization and before coating.

As for the addition method, it may be directly dispersed in a hydrophilic colloid, or it may be added after being dissolved in an organic solvent such as methanol or acetone.

Next, the silver halide photographic material of the present invention has the following characteristics:
Since the side having the king layer contains a latex polymer, the latex polymer will be described below.

Although any latex polymer may be contained in the photosensitive material of the present invention, those containing (meth)acrylic acid polymer units are preferred. In this specification, the term (meth)acrylic refers to both acrylic and methacrylic. Examples of (meth)acrylic acid-based polymers include copolymers of (meth)acrylic acid, homopolymers of (meth)acrylic esters, copolymers of (meth)acrylic esters, and the like. Specifically, homopolymers of alkyl acrylates, mutually polymerized alkyl acrylates and alkyl methacrylates, homopolymers of alkyl methacrylates, alkyl acrylates, alkyl methacrylates, acrylates, methacrylates, and other ethylenically unsaturated polymerizable compounds. A water-insoluble addition polymer such as a polymer having one or more -CH-C<, preferably one or more C) (z=C<) is used. can be mentioned.

Specific examples of the above (meth)acrylic acid-based polymers include copolymers of acrylate and vinylidene chloride, copolymers of methacrylate and vinylidene chloride,
A copolymer of at least one compound selected from a copolymer of acrylate and vinyl ester, a copolymer of methacrylate and vinyl ester, and at least one compound selected from acrylic acid, methacrylic acid, and itaconic acid, etc. and these copolymers are preferred.

Specific examples of acrylate and methacrylate include ethyl acrylate, n-butyl acrylate, n-
-octyl acrylate, n-dodecyl acrylate,
Ethyl methacrylate, n Butyl methacrylate, n
-octyl methacrylate, n-dodecyl methacrylate, and the like. Specific examples of vinyl ester include Example 1. i Vinyl butyrate, vinyl propionate, vinyl acetate, vinyl laurate, and the like. The molecular weight of the copolymer is practically preferably 500 to 500,000. Specific examples of such homopolymers or copolymers are shown below in (1) to (12), but the latex polymer that can be used in carrying out the present invention is not limited to these homopolymers or copolymers.

Homopolymer-e-CHz -C8su7- 0OCJs T#100,000 COOCzHs OOH M#150,000--tCHI CM +-2-+CHz cllh
-X: V = 97: 3 homopolymer CIl□-CH# C00C,)I.

Pr= 350,000 Hff −←CH2−C−+−5r−+−CIl 2 C1l
→1-COoC) 13 C00H x:y=96:4 I bow O million I x: y :z=70:28:2I bow 00,000 C11゜Js x: y:z=85:13:2M#800,000 :z=88:19:3 C00C,)IQ ClIC0OIIX : y :z=80:16:4 M#100,000 In addition, in the above (1) to (12), x+Y+2 is the mol% of each monomer component , and M is the average molecular weight (
In this specification, average molecular weight refers to number average molecular weight).

Generally, (meth)acrylic acid-based polymers contain at least 65%, preferably 75 to 95% by weight of alkyl, alkyl acrylates, alkyl methacrylates (e.g. ethyl acrylate, methyl acrylate, butyl acrylate, ethyl methacrylate, octyl methacrylate). It is desirable to use polymers with acrylates, etc.). The polymer most useful for carrying out the present invention generally has an average molecular weight of about 500 to about 500,000, as described above, and a particle size of 1 μm or less in the dispersion.

The above-mentioned (meth)acrylic acid-based polymer is insoluble in water, but can be easily dispersed in water, and the above-mentioned (meth)acrylic acid-based polymer can be used with a suitable halogenated pebutizer such as gelatin. It can be used alone or in mixtures with other photographic binders.

The amount of latex polymer contained in the silver halide photographic optical material of the present invention is 0.000000000000000000000000000000000000000000000000000000000000000 type0 type type type type type nature type nature type type nature type type form type nature type form size form.
It is preferably 1 g to 10 g, particularly preferably 0
．． It is to contain 2g to 5g.

In the present invention, the silver halide emulsion layer and the backing layer of the light-sensitive material are formed on different sides of the support, but
As the support used in the present invention, it is preferable to use a flexible support commonly used for photographic materials. Useful flexible supports include cellulose nitrate,
Cellulose acetate, cellulose acetate butyrate, polystyrene,
Films made of semi-synthetic or synthetic polymers such as polyvinyl chloride, polyethylene terephthalate, polycarbonate, baryta paper, or paper coated or laminated with α-olefin polymers (e.g. polyethylene, polypropylene, engineered tylene/butene copolymers), etc. be. The support may be colored using dyes or pigments. It may be made black for the purpose of blocking light.

The surface of these supports may be subjected to a subbing treatment, as is generally done, to improve adhesion to photographic emulsion layers and the like. The support surface is treated with corona discharge,
Ultraviolet irradiation, flame treatment, etc. may also be applied.

Next, silver halide for forming a silver halide emulsion in carrying out the present invention, additives that can be included in the emulsion, and other additives that can be included in the photographic constituent layers will be described.

The silver halide grains used in the silver halide photographic material of the present invention may be obtained by any of the acid method, neutral method, ammonia method, and the like. The particles may be grown all at once, or may be grown after seed particles are harvested. The method for producing seed particles and the method for growing them may be the same or different.

In the silver halide emulsion, halide ions and anti-ion ions may be mixed simultaneously, or one may be mixed in a liquid in which the other is present. Further, while considering the n-field growth rate of silver halide crystals, λ halide ions and root ions may be sequentially added simultaneously while controlling the pH and pAg in the mixing pot. By this method, silver halide grains having a regular crystal shape and a nearly uniform grain size can be obtained. Conversion may be used after growth to change the halogen composition of the particles.

When producing the silver halide emulsion used, a silver halide solvent can be used as necessary to control the grain size, grain shape, grain size distribution, and grain growth rate of the silver halide grains.

Silver halide grains are produced by adding metal ions using cadmium salts and various other metal salts during the process of grain formation and/or growth, and these metal elements are added inside the grains and/or on the grain surfaces. It can contain
Further, by placing the particles in an appropriate reductive cloud environment, reduction aggravation nuclei can be provided inside the particles and/or on the particle surfaces.

Unnecessary soluble salts may be removed from the silver halide emulsion after the growth of silver halide grains is completed, or they may be left contained. When removing the salts, Research Disclosure (Research Disclosure) is required.
Closure) No. 17643.

The silver halide grains may have a uniform silver halide composition distribution within the grain, or may be core/shell grains in which the silver halide composition differs between the inside of the grain and the surface layer. They may also be tabular grains.

In carrying out the present invention, for example, an inner core made of silver bromide or silver iodobromide, a first coating layer made of silver iodobromide on the outside of the inner core, and an additional coating layer made of silver bromide on the outside of the first coating layer are used. or a second coating layer made of silver iodobromide, the iodine content of the first coating layer is 10 mol% or more higher than the iodine content of the inner core, and the silver of the first coating layer accounts for the entire grain. A silver halide emulsion containing silver halide grains in a proportion of 0.01 to 30 mol % can be used.

The silver halide grains may be grains in which a latent image is mainly formed on the surface, or grains in which a latent image is mainly formed inside the grain.

Silver halide grains may have regular crystal shapes such as cubes, octahedrons, and dodecahedrons, or may have spherical or plate-like crystals. The ratio may be arbitrary, and the particles may have a composite crystal form, or particles of various crystal forms may be mixed.

The silver halide emulsion used in the present invention consists of two separately formed silver halide emulsions.
A mixture of more than one type of silver halide emulsion may be used.

The silver halide grains used in the present invention can be optically sensitized to a desired wavelength range using a dye known as a sensitizing dye in the photographic industry. Aggravating pigments may be used alone, or two or more types may be used in combination. Even if the emulsion contains a supersensitizer, which is a dye that itself does not have a spectral sensitizing effect, or a compound that does not substantially absorb visible light, and which enhances the sensitizing effect of the sensitizing dye, together with the enhancing dye. good.

In addition, in carrying out the present invention, the photosensitive material may contain arbitrary additives, and these may be described in Research Disclosure, Vol. 176, No. 17643 (December 1978).
(November 1976) and Vol. 187, 11h18716 (November 1976), and the relevant sections are summarized in the table below.

Known photographic additives that can be used in the preparation of emulsions that can be used in the light-sensitive material of the present invention are also described in the above two Research Disclosures, and the descriptions are shown in the following table.

〔Example〕

The present invention will be explained below using examples. However, as a matter of course, the present invention is not limited to the examples described below.

Example 1 Monodisperse cubic silver iodobromide containing 2.0 mol% of silver iodide with an average grain size of 0.20 μm was prepared by the double jet method at 60°C, pAg=8.0, and pH=2.0. A crystal emulsion was obtained. A part of this emulsion was used as a core and grown as follows. That is, the solution containing core particles and gelatin was heated to 40°C.
, p A g = 8.0, pH = 9.5, an ammoniacal silver nitrate solution and a solution containing potassium iodide were added by a double jet method to form a first coating layer containing 25 mol % of silver iodide. .

Note that the addition rate was gradually increased as the particles grew.

The resulting emulsion was an octahedral monodisperse emulsion with an average grain size of 0.45 μm. Using this emulsion grain as a core, further p A g
-11.0, pH=9.0, an ammoniacal silver nitrate solution and a potassium bromide solution were added by a double jet method to form a second coating layer. It was an octahedral monodispersed emulsion with an average grain size of 0.80 μm. This is designated as emulsion 11hE-1.

The silver iodide content at this time was 4 mol%.

Also, 30 g of gelatin and 10 g of potassium bromide in 1 liter of water.
5g, thioether (110 (Cfh) 1s (CHz
) zs(CI□)2S(C1h)zOH) 0.5w
Add and dissolve 10 mJ of t% aqueous solution, and add 30 ml of 0.88 mol silver nitrate solution and 0.88 mol iodine into the solution (pAg = 9.1. pH = 6.5) kept at 65°C with stirring. A mixed solution of potassium chloride and potassium bromide (molar ratio 96.
5: 3.5) After simultaneous addition of 30 ml 1 in 15 seconds, molar ratio 96.5 with 600 ml of 1 molar silver nitrate solution
A tabular silver iodobromide emulsion was prepared by simultaneously adding 500 ml of a 1 mol mixed solution of potassium bromide and potassium iodide (3.5%) over 70 minutes. Add this to emulsion 11h
Name it E-2. The obtained tabular silver halide grains had an average grain size of 1.18 μm, a thickness of 0.15 μm, and a silver iodide content of 3.5 mol %.

Add 1 thiocyanate per mole of silver to the above two emulsions.
．． Chemical ripening is carried out by adding 8 X 10-' moles of chloroauric acid and hypo, followed by v potassium iodide.
Using particles in which 8 x 10-' moles were added per mole of A, then the sensitizing dyes listed below were added, and the particles were adsorbed at 55°C for 15 minutes, the additives listed in Table 1 were added in the composition of the emulsion coating solution listed below. An emulsion coating solution containing the indicated polyhydric alcohol was prepared. The emulsion is the above emulsion 11hE- as shown in Table 1.
Either 1 or 11hE-2 was used.

The amount of gelatin added to the emulsion coating solution was the amount necessary to achieve the amount of gelatin per unit area shown in Table 1. The emulsion surface in this example is formed from an emulsion layer and a protective layer, and the emulsion coating liquid has a silver content of 3.2 g per side.
/rd, the protective layer liquid (composition listed below) was applied at a speed of 140 m/min so that the amount of gelatin was 0.98 g/% per side.

(Sensitizing dye) Amount added: 600 mg/Ag A backing wear coating liquid containing alcohol and latex polymer was prepared and applied. The backing coating liquid was applied at a speed of 140 m/min so that the amount of gelatin per unit area was as shown in Table 1. In this example, the amount of binder on the side having the backing layer corresponds to the sum of the amounts of gelatin and latex polymer. The emulsion coating solution, the protective layer solution, and the backing coating solution were simultaneously coated in multiple layers and dried. This gave samples 1 to 25.

The compositions of the backing coating solution, emulsion coating solution, and protective layer solution are shown below.

(Composition of coating solution for backing) (a) Lime-treated inert gelatin per 11 coating solutions in the amount listed in Table 1 (
b) C3H? CJ+5CON(CHzCIIzOh-HCIlz)y
sO:+Na Ig(c) NaUsS L;HC00CsHt+g UHgS(hll (i) Polymethylmethacrylate cloak agent with average particle size of 5 μm (j) Formalin aqueous solution (35%) (k) Glyoxal aqueous solution (40%) (1) Sodium chloride (Composition of emulsion coating solution) (a) Lime-treated ossein gelatin amount listed in Table 1 (b) 5-methyl-1,3,4,7a-tetrazainden-7-ol 0.8 g per 11 coating solutions (c) Silver halide grains
0.6mol 1.1g 0.8m 1 0.9ff11 1g (e) Nitron 0.05g (f
) Copolymer fine particles of styrene and butadiene (average particle size 0.03 μm) 2.5 g (g) Copolymer of styrene and maleic acid 1.5 g (h) 2,2-dihydroxymethyl-1-butanol (protective layer liquid composition) Coating 41 lime-treated inert gelatin per liquid 11, acid-treated gelatin, C, H? C? Fl 5cON(C)IzClhO)r(C112
5SOzNag 8g 1g 1g E, ClIC0OCI. 11□1NaOa
To S CHC00Csll++g, CJ+J(CHzCtlzO) +. CH2C
H! O1+1.5g Chi, C4F? 1 g of S03, 1.1 g of polymethyl methacrylate, a matting agent with an average particle size of 5 μm, 30 g of Ludox AM (colloidal silica, manufactured by DuPont),
2-4-dichloro-6-hydroxy=1.3.5-
1-Aqueous solution of riazine sodium salt (2%)
5ml, formalin aqueous solution (3
5%) 0.8++ Il, Glyoxal aqueous solution (40%) 0.9mjl, Sodium chloride Ig For each of the obtained samples, the following degree of curl and scratch resistance were measured. The measurement method is shown below.

・Tanmen - Curl degree sample at temperature 23℃, relative humidity 20%RH150%RH1
Each was left in each atmosphere of 80% RH2 for 10 hours,
After adjusting the humidity, the degree of curl was measured.

The three samples and hygroscopic paper (for example, sandwich paper made of ordinary natural pulp paper) were placed at a temperature of 23°C and a relative humidity of 5°C.
After being left in an atmosphere of 0% RH for 10 hours to adjust the humidity, three samples were stacked and sandwiched between the hygroscopic paper, and 2 g /
A load was applied so that it became c4, and it was stored for 48 hours. After storage, the degree of curl of the sample that was in contact with the hygroscopic paper was measured.

i, Ri・Tsuki's i・・The sample was conditioned at 23℃ and 80%RH for 12 hours, the same films were stacked on top of each other, sealed and packaged under the same conditions, and a pressure of 20g/- was applied to the film. Apply a load to
After being left at 50° C. for 3 days, the degree of stickiness between the films was evaluated on the following five scales.

A: No adhesion at all B: Adhesion within 5% of the total area C: Adhesion within 10% of the total area D: Adhesion within 30% of the total area E; Adhesion within 31% of the total area on λ Furthermore, an automatic transport test was conducted on 100 of these samples using an imaging camera.

Tests were conducted at relative humidity of 20% RH and 80% RH, respectively, and Table 1 shows the average number of normally transported sheets.

For each of the above samples, the unexposed sample was
．． Using the developing solution, fixing solution, and automatic developing machine described in Example 1 of No. 154, processing was performed at 35° C. for 45 seconds. The samples thus obtained were evaluated for scratch damage.

The evaluation was classified into the following four stages, and the results are shown in Table 1.

A: No scratches B: Very few scratches C: Slight scratches D = A lot of light generation As is clear from Table 1, the samples of the present invention have a smaller Bekard degree than the comparative samples. It also has excellent transportability.

In addition, if the amount of polyhydric alcohol is too large, the anti-sticking property deteriorates and there is a tendency for the transportability to deteriorate.However, the sample of the present invention also has an improvement in this point.Furthermore, the sample of the present invention No scratches occurred.

Example 2 In this example, an attempt was made to reduce the degree of curl by specifying the winding direction of the sample.

The coated sample according to sample size 16 prepared in Examples to 1 was wound, stored, and then cut under the conditions shown below. The diameter of the winding core during winding was 200 mm.

From the above results, it can be seen that even a relatively highly curled sample can be reduced in curl by winding it in the opposite direction to the direction of the curl and adding curls to the support itself. It can be said that the degree of curl can be reduced by correcting the imbalance between the emulsion surface and the surface on the side having the backing layer by the curling of the support.

〔Effect of the invention〕

As described above, the silver halide photographic light-sensitive material of the present invention can prevent the occurrence of curvature, has good scratch resistance, and has the advantage of good transportability even during automatic transport. have

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the degree of curl of a photosensitive material.

Claims (1)

[Scope of Claims] 1. In a silver halide photographic material having at least one silver halide emulsion layer on one side of a support and a backing layer on the other side, the silver halide emulsion layer described above The ratio of the total amount of binder per unit area on the side having the backing layer to the total amount of binder per unit area on the side having the backing layer is in the range of 0.7 or more and 1.4 or less,
and at least one of the above sides contains a polyhydric alcohol having at least two hydroxyl groups in an amount of 1.0 x 10^-^3g to 2.0g per 1g of binder, and the side having the backing layer contains a latex polymer. A silver halide photographic material comprising: