JPH05346636A - Photographic supporting body - Google Patents

Abstract

PURPOSE:To provide such a photographic supporting body that curling of the body is eliminated, excellent color reproducibility of a positive photosensitive material is obtd., and no bad influence due to thermal deterioration is given to characteristics of a photographic emulsion, by incorporating an antioxidant and a copolymer polyester having aromatic dicarboxylic acid having metal sulfonate group as the monomer unit. CONSTITUTION:This photographic supporting body contains an antioxidant and a copolymer polyester having aromatic dicarboxylic acid with metal sulfonate as the monomer unit. It is required that the supporting body has 93 color index L and <=3 color index (b). The copolymer polyester contains, preferably, aromatic dicarboxylic acid having metal sulfonate groups as the copolymer component and aromatic dibasic acid and glycol as the main structural component. The antioxidant is, for example, hindered phenol compd., allylamine compd., phosphite compd., etc.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a photographic support,
More specifically, the curl can be easily eliminated,
Suitable for silver halide photographic light-sensitive materials having excellent photographic characteristics such as excellent photographic emulsion characteristics and no adverse effect on color reproducibility of positive-working light-sensitive materials when used. Photographic support. Also,
The present invention relates to a photographic support suitable as a photographic film (sometimes referred to as a photographic light-sensitive material) that can be loaded in a small camera.

[0002]

2. Description of the Related Art Small cameras are now widely used in the general market. Considering the handiness of this compact camera so that it is convenient to carry, it is desired that the compact camera be made smaller than it is now. In order to further reduce the size of this small camera, it is indispensable to make the storage space of the photographic film contained therein compact.

[0003] Usually, the photographic film is stored in a small camera in a state of being wound on a spool in a roll, so that the storage space in the small camera can be made more compact and a certain number of images can be secured. , It is necessary to reduce the thickness of the photographic film itself. In particular, the thickness of the support of the photographic film is currently about 120 to 125 μm, which is considerably thicker than the thickness (20 to 30 μm) of the photosensitive layer formed on the surface thereof. Therefore, it is most effective to further reduce the thickness of the support of the photographic film in order to reduce the thickness of the entire photographic film.

By the way, as a support for a photographic film which has been conventionally used, triacetyl cellulose (TAC) is used.
Sometimes abbreviated. A film is typical.
However, since this TAC film originally has low mechanical strength, if the TAC film is made thinner, the transportability and handleability in the photographing apparatus and the subsequent development processing step will be deteriorated. Therefore, the thickness of the TAC film as a support of this photographic film cannot be made thinner than the current one.

On the other hand, polyester has been conventionally known as a support and is often used in films for X-ray and plate making films. However, when a polyester film is used as a photographic support, its mechanical strength is excellent, but there is a problem that the curl once attached cannot be removed even after development of the photographic film.

According to Japanese Patent Laid-Open No. 1-244446,
As a polyester having polyethylene terephthalate (PET) as a main component, a polyester obtained by copolymerizing an aromatic dicarboxylic acid having a metal sulfonate group, an aliphatic dicarboxylic acid, and a diol component as an acid component is disclosed. It is known that when this polyester is used as a photographic support, the curl of a photographic film can be easily eliminated.

However, when this polyester is used as a photographic support, the photographic properties, especially the storability at high temperature, are deteriorated, and the polyester is not practically usable yet.

JP-B-57-28336 discloses that a polyester having polyethylene terephthalate as a main component and a copolyester in which an aromatic dicarboxylic acid having a metal sulfonate group is copolymerized with polyethylene glycol as a photographic element. Have been described. This copolyester can easily eliminate curl, but the photographic film using this copolyester as a photographic support is inferior in photographic characteristics, especially in storage stability at high temperature, and is a problem in practical use. There is.

Another important performance required for a photographic support is long-wavelength light which is particularly prone to halation in a negative light-sensitive material coated with a silver halide negative emulsion, that is, red light in the spectrum and near light. It is necessary to be able to prevent halation caused by absorption in the infrared region (antihalation property). Further, long-wave light is easily transmitted from the side exposed at the end of the leader of the photographic film drawn out from the magazine toward the inside, causing fog, and the photographic support effectively prevents this. It is necessary to be able to do it.

Further, at the stage of completion of development processing and drying, the photographic support has a short wavelength region (about 400 to 550).
(nm), it is desirable that the absorption of light is small. This is because if the photographic support absorbs light in this region, the positive-working photosensitive material such as photographic paper and the positive-working light-sensitive material for roentgen have a light-sensitive region in this short wavelength range, so that the positive-working photosensitive material is used. In the case of printing, since it suppresses the color development of the yellow layer that is mainly exposed in the short wavelength region during printing, there is a drawback that a photograph with an unbalanced color with magenta and cyan colors can be obtained. This is because the light-sensitive material has a drawback that a desensitizing action of a filter occurs at the time of photographing and a turbid photograph such as a fog can be obtained.

In order to solve the above problems, even if an attempt is made to alleviate the wavelength dependence of the spectral characteristics by mixing a dye into a photographic support and dyeing it, the light absorption peculiarity in the short wavelength region is alleviated. Mixing the required amount of dye into the medium will greatly reduce the transmittance in the medium wavelength range, and in the case of positive-type photosensitive materials such as photographic paper, the color balance does not improve much and the overall As a result, the density of the color is reduced, which may result in an unfavorable photograph in the end.

Further, in the case of a positive-type photosensitive material for an X-ray film, a decrease in the transmittance of the base leads to a deterioration in image quality, which is not practical.

In order to compensate for this, it is conceivable to increase the amount of silver halide in the emulsion layer of the positive-working light-sensitive material and to change the system settings including the photographing in the positive-working light-sensitive material for X-ray. In the case of such positive-working photosensitive materials, the reduction in film transmittance is to be solved by increasing the exposure time during printing. It is a big demerit in the present situation that is required.

Further, the increase in the amount of silver halide causes an increase in cost due to the high price of raw materials for silver halide, in other words, there is a problem in equipment such that extra equipment for recovering silver needs to be provided. In addition, the silver halide that flows into the processing solution during the development processing and the fixing processing causes a serious problem in terms of environmental pollution. However, it is practically impossible to change the processing setting of the automatic processor in view of the present large global market.

In view of the above-mentioned various problems, a photographic support must have a certain spectral characteristic or a required color, and there are too many practical problems to be used. ..

An object of the present invention is to solve the above problems,
Specifically, curl can be easily eliminated (curl resolving property), and excellent photographic characteristics that do not adversely affect the color reproducibility of the positive-type photosensitive material and the emulsion emulsion characteristics of the photograph due to heat deterioration are provided. It is to provide a photographic support having the same.

[0017]

The invention according to claim 1 for achieving the above object comprises a copolymerized polyester having an aromatic dicarboxylic acid having a metal sulfonate group as a monomer unit, and an antioxidant. And a color index L value of 93 or more and a color index b value of 3 or less.
In the invention according to claim 2, the copolyester is
The amount of the aromatic dicarboxylic acid having a metal sulfonate group, which contains polyalkylene glycol as a monomer unit and is detected by hydrolyzing the copolyester, is 2 to all ester bonds.
The photographic support according to claim 1, wherein the amount of the polyalkylene glycol is 7 mol%, and the amount of the polyalkylene glycol is 3 to 10% by weight based on the weight of all reaction products. The invention according to 3, wherein the copolymerized polyester has an aliphatic dicarboxylic acid as a monomer unit, and the amount of the aliphatic dicarboxylic acid detected by hydrolyzing the copolymerized polyester is the total ester. 3. The amount of 3 to 25 mol% with respect to the bond
The photographic support described in 1.

The present invention will be described in detail below.

Preferred examples of the copolyester in the present invention include a copolyester having an aromatic dicarboxylic acid having a metal sulfonate group as a copolymerization component and an aromatic dibasic acid and a glycol as main constituents. You can

Examples of the aromatic dibasic acid include terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, and the glycols include ethylene glycol, propylene glycol, butanediol,
Examples include neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycol, p-xylylene glycol and the like. Among these, terephthalic acid is preferable as the aromatic dibasic acid, and ethylene glycol is preferable as the glycol.

Examples of the aromatic dicarboxylic acid having a metal sulfonate group include 5-sodium sulfoisophthalic acid, 2-sodium sulfoisophthalic acid, 4-sodium sulfoisophthalic acid, 4-sodium sulfo-2,6.
-Naphthalenedicarboxylic acid, or an ester-forming derivative represented by the following (Chemical formula 1), and compounds obtained by substituting these sodiums with other metals such as potassium and lithium can be given.

[0022]

[Chemical 1]

The copolyester of the present invention is
Polyalkylene glycol and / or carbon number 4 to 2
It is preferable to contain 0 aliphatic dicarboxylic acid as a copolymerization component.

As the polyalkylene glycol,
Examples thereof include polyethylene glycol and polytetramethylene glycol, among which polyethylene glycol is preferable. The molecular weight is not particularly limited, but is 300 to 20,000, preferably 600 to 1
It is 50,000, and more preferably 1,000 to 5,000.

Examples of the aliphatic dicarboxylic acid having 4 to 20 carbon atoms include succinic acid, adipic acid, sebacic acid, etc. Of these, adipic acid is preferred.

The copolyester having an aromatic dicarboxylic acid having a metal sulfonate group as a monomer unit in the present invention has a quantity of the aromatic dicarboxylic acid having a metal sulfonate group, which can be detected by hydrolyzing the copolyester. In order to obtain a photographic support having excellent heat resistance, sufficient curling, and excellent mechanical strength, 2 to 7 mol% based on all ester bonds is required.
And the amount of the polyalkylene alkylene glycol is 3 to 10% by weight based on the weight of the total reaction product.

Further, when the copolyester having an aromatic dicarboxylic acid having a metal sulfonate group as a monomer unit in the present invention contains an aliphatic dicarboxylic acid as a monomer unit, it is detected by hydrolyzing the copolyester. The amount of the aliphatic dicarboxylic acid used is usually 3 to the total ester bond.
25 mol%. When the aliphatic dicarboxylic acid as a monomer unit is contained in the copolyester so that the amount of the aliphatic dicarboxylic acid is within the above range, the curl of the photographic film can be easily eliminated, and the photograph The support for use can be provided with practical heat resistance.

The copolyester used in the present invention may have other types of monomer units as long as the object of the present invention is not impaired.

The copolyester having an aromatic dicarboxylic acid having a metal sulfonate group as a monomer unit is not particularly limited in its production method. For example, after transesterifying the dicarboxylic acid component and the glycol component, And polycondensation under reduced pressure. At this time, the copolymerization component,
For example, aromatic dicarboxylic acids having a metal sulfonate group or polyethylene glycol may be added during the transesterification reaction, or after the transesterification reaction and during the polycondensation.

Examples of the catalyst used for the transesterification include acetates, fatty acid salts, carbonates of metals such as manganese, calcium, zinc and cobalt. Of these, hydrates of manganese acetate and calcium acetate are preferable, and those containing these in combination are preferable.

It is also effective to add a hydroxide, a metal salt of an aliphatic carboxylic acid, a quaternary ammonium or the like to the extent that the reaction is not inhibited or the polymer is colored during the transesterification and / or polycondensation. Among them, sodium hydroxide, sodium acetate and tetraethylhydroxyammonium are preferable, and sodium acetate is particularly preferable. The addition amount of these is 1 × 10 ^-2 to 2 with respect to all acid components.
0 × 10 ^-2 mol% is preferable.

The copolyester used in the present invention contains phosphoric acid, phosphorous acid, and their esters and inorganic particles (for example, silica, kaolin, calcium carbonate, calcium phosphate, titanium dioxide, etc.) which are mixed in at the polymerization stage. The inorganic particles may be added after the polymerization.

The copolymerized polyester may be added with a dye, an ultraviolet absorber, an antioxidant and the like at any stage of the polymerization stage and the post-polymerization stage.

The photographic support of the present invention contains a specific copolyester and an antioxidant.

The type of the antioxidant is not particularly limited, and specific examples thereof include hindered phenol compounds, allylamine compounds, phosphite compounds, and thioester antioxidants. .. Among these, hindered phenol compounds are preferable. Of these, the compounds represented by the compound numbers 1 and 2 in (Chemical Formula 2) are preferable.

The content of the antioxidant in the photographic support is usually preferably 0.01 to 2% by weight, and more preferably, the amount of the antioxidant with respect to the copolyester in view of photographic performance and turbidity of the copolyester. Is 0.1 to 0.5% by weight
Is. In addition, these antioxidants can be used alone or in combination of two or more thereof.

Next, the structural formulas of the antioxidants that can be used in the present invention are shown.

[0038]

[Chemical 2]

[0039]

[Chemical 3]

[0040]

[Chemical 4]

[0041]

[Chemical 5]

[0042]

[Chemical 6]

[0043]

[Chemical 7]

[0044]

[Chemical 8]

[0045]

[Chemical 9]

[0046]

[Chemical 10]

[0047]

[Chemical 11]

[0048]

[Chemical formula 12]

[0049]

[Chemical 13]

[0050]

[Chemical 14]

The photographic support according to the present invention has a color index L value of 93 or more, preferably 94 or more, more preferably 95 or more, and ab value of 3 or less, preferably 2 or less. .. The index L value is 93 or more, and b
When the value is 3 or less, when the color reproduction of the positive type photosensitive material is performed with the negative type photosensitive material obtained by using this photographic support, it is necessary to prevent the photographic support itself from adversely affecting the color reproduction. You can Here, the index L value and the b value can be calculated from the transmittance when measured with a color analyzer under a C light source according to the JIS standard by a transmission method.

In order to obtain a photographic support having such color index L value and b value, the polymerization temperature at the time of polymerization for obtaining the copolyester is evaluated by the required degree of polymerization (intrinsic viscosity). It is better to set it as low as possible within the range that can obtain. This is because the b value tends to increase when the polymerization temperature is high. Further, the color of the photographic support can be adjusted to the above index value by using a manganese compound and a calcium compound in combination as the transesterification catalyst.

The photographic support according to the present invention has a light piping phenomenon (fogging) which occurs when light enters the photographic support coated with a photographic emulsion layer from an edge.
For the purpose of preventing this, it is preferable to incorporate a dye in this photographic support. The dye to be blended for such a purpose is not particularly limited in its type, but in the film forming process of the film, a dye excellent in heat resistance is preferable,
For example, anthraquinone type chemical dye and the like can be mentioned. As the color tone of the photographic support, gray dyeing is preferable as seen in general light-sensitive materials, and one kind or two or more kinds of dyes can be mixed and used. As these dyes, S manufactured by Sumitomo Chemical Co., Ltd.
UMIPLAST, Diar made by Mitsubishi Kasei Kogyo Co., Ltd.
Dyes such as MACROLEX manufactured by Esin and Bayer may be used alone or in combination as appropriate.

The photographic support of the present invention can be used, for example, after the copolymerized polyester is sufficiently dried,
A sheet is melt-extruded through an extruder, a filter, a die and the like controlled in a temperature range of 0 ° C., and the molten polymer is cooled and solidified on a rotating cooling drum to obtain an unstretched film. After that, the unstretched film is biaxially stretched in the machine direction and the transverse direction, and heat-fixed to produce the film.

The stretching condition of the film cannot be uniformly specified because it varies depending on the copolymerization composition of the copolyester, but the stretching ratio in the temperature range from the glass transition temperature (Tg) of the copolyester to Tg + 100 ° C. in the machine direction. 2.5-6.0 times, Tg + 5 ° C to Tg + 50 in the lateral direction
The draw ratio is in the range of 2.5 to 4.0 times in the temperature range of ° C. The biaxially stretched film obtained as described above is usually heat set at 150 ° C. to 240 ° C. and cooled. In this case, if necessary, it may be relaxed in the vertical direction and / or the horizontal direction.

The photographic support of the present invention may be a single-layer film or sheet formed by the above-mentioned method, or may be a film or sheet of another material formed by a coextrusion method or a laminating method. It may have a multilayer structure in which a film or sheet formed by the above method is laminated.

The photographic support of the present invention is particularly suitable as a photographic film support used in the form of a roll.

The photographic film has the following layer structure using the photographic support of the present invention.

That is, the photographic film has at least one silver halide emulsion layer on at least one surface of the photographic support of the present invention. In other words, at least one silver halide emulsion layer may be provided on one side of the photographic support, or at least one silver halide emulsion layer may be provided on both sides of the photographic support. The silver halide emulsion can be coated directly on the photographic support or can be coated through another layer, for example, a hydrophilic colloid layer containing no silver halide emulsion. A hydrophilic colloid layer as a protective layer may be coated on the silver halide emulsion layer. Further, the silver halide emulsion layer may be separately coated on each of the silver halide emulsion layers having different sensitivities, for example, high sensitivity and low sensitivity. In this case, an intermediate layer may be provided between each silver halide emulsion layer. That is, you may provide the intermediate layer which consists of hydrophilic colloids as needed. Further, a non-photosensitive hydrophilic colloid layer such as an intermediate layer, a protective layer, an antihalation layer or a backing layer may be provided between the silver halide emulsion layer and the protective layer.

The silver halide used in the silver halide emulsion may have any composition.
Examples thereof include silver chloride, silver chlorobromide, silver chloroiodobromide, pure silver bromide and silver iodobromide.

Further, this silver halide emulsion may contain a sensitizing dye, a plasticizer, an antistatic agent, a surfactant, a hardener and the like.

To develop a photographic film using the photographic support of the present invention, for example, T.W. H. James, The Theory of The Photografic Process,
Forth Edition) pp. 291-334 and Journal of the American Chemical Society, 7th.
The developer described in Volume 3, page 3,100 (1951) can be used.

[0063]

【Example】

(Example 1) A. Preparation of support 100 parts by weight of dimethyl terephthalate and 64 parts by weight of ethylene glycol were mixed with calcium acetate hydrate and manganese acetate hydrate as transesterification catalysts in a molar ratio of 2 × 10 ^{−4 to} dimethyl terephthalate, respectively. Only the amount was added, and the transesterification reaction was carried out by a conventional method.

The obtained product was added to 5-sodium sulfo-di (β-hydroxyethyl) isophthalic acid (abbreviation: S
IP) ethylene glycol solution (concentration 35% by weight),
And polyethylene glycol (abbreviation: PEG) (number average molecular weight: 3000) are added by adjusting the amounts so that the polymer composition ratios shown in Table 3 are obtained, and then 0.05 parts by weight of antimony trioxide and phosphorus are added. 0.13 parts by weight of acid trimethyl ester, and Irganox 1010 (registered trademark, CIBA of the structural formula 2 described above as an antioxidant.
-Manufactured by GEIGY) was added to the resulting polymer in an amount of 0.4% by weight. Then, gradually raise the temperature and reduce the pressure to 270 ° C. or 275 ° C. (see Table 3), 0.5 m
Polymerization was carried out at mHg, and 5 types of copolyesters (Table 3
No. 1-5) was obtained.

These copolymerized polyesters were vacuum dried at 150 ° C., melt-extruded at 280 ° C., and rapidly solidified on a cooling drum to prepare an unstretched film. This unstretched film was stretched 3.3 times in the vertical direction at 80 ° C.,
After further stretching 3.3 times in the horizontal direction at 90 ° C., 22
It was heat set at 0 ° C. for 30 seconds to obtain a biaxially stretched film having a thickness of 70 μm. This biaxially stretched film was used as the photographic support of this invention.

B. Preparation of photosensitive material 8 W / (m ² · mi) on both sides of the biaxially stretched film
n) was subjected to corona discharge treatment, and one surface of this biaxially stretched film was coated with the following undercoat coating solution B-3 to give a dry film thickness of 0.8 μm.
To form a subbing layer B-3, and the following subbing coating solution B-4 is applied to the other surface of the biaxially stretched film so as to have a dry film thickness of 0.8 μm. Undercoat layer B-4
Formed.

<Coating Liquid B-3> Copolymer latex liquid (30% solid content, 30% by weight of butyl acrylate, 20% by weight of t-butyl acrylate, 25% by weight of styrene and 25% by weight of 2-hydroxyethyl acrylate). ) 270 g Compound (UL-1) 0.6 g Hexamethylene-1.6-bis (ethylene urea) 0.8 g Water 1,000 ml.

<Coating Liquid B-4> Copolymer latex liquid of butyl acrylate 40% by weight, styrene 20% by weight and glycidyl acrylate 40% by weight (solid content 30%) 270 g Compound (UL-1) 0.6 g Hexa Methylene-1,6-bis (ethylene urea) 0.8 g Water 1,000 ml.

Further, a corona discharge of 8 W / m ² · min was applied on the undercoat layer B-3 and the undercoat layer B-4 to obtain the undercoat layer B.
-3, the following coating solution B-5 was applied to a dry film thickness of 0.1 μm.
To form a subbing layer B-5.
-4, the following coating solution B-6 is applied to a dry film thickness of 0.8 μm.
Undercoat layer B-6 having antistatic function by coating
Formed.

<Coating Liquid B-5> Gelatin 10 g Compound (UL-1) 0.2 g Compound (UL-2) 0.2 g Compound (UL-3) 0.1 g Silica particles having an average particle diameter of 3 μm 0.1 g Water 1,000 ml.

<Coating Liquid B-6> Water-soluble conductive polymer (UL-4) 60 g Latex liquid containing compound (UL-5) as a component (solid content 20%) 80 g Ammonium sulfate 0.5 g Curing agent (UL-6 ) 12 g Polyethylene glycol (weight average molecular weight 800) 6 g Water 1,000 ml.

The structures of the compounds used are summarized below.

25 W / m ² · min on the undercoat layer B-5
8W / m on the undercoat layer B-6.
A corona discharge of ² min was applied. The undercoat layer B-5
The following emulsion layers and the like were sequentially formed from the side of the photographic support to prepare a multilayer color photographic light-sensitive material.

<Emulsion layer> First layer; antihalation layer (HC) Black colloidal silver 0.15 g UV absorber (UV-1) 0.20 g Compound (CC-1) 0.02 g High boiling point solvent (Oil-1) ) 0.20 g High boiling point solvent (Oil-2) 0.20 g Gelatin 1.6 g.

Second layer: Intermediate layer (IL-1) 1.3 g of gelatin Third layer: Low-sensitivity red-sensitive emulsion layer (RL) Silver iodobromide emulsion (average grain size 0.3 μm) 0.4 g ( Average iodine content 2.0 mol%) Silver iodobromide emulsion (average grain size 0.4 μm) 0.3 g (average iodine content 8.0 mol%) Sensitizing dye (S-1) 3.2 × 10 ^-4 (mol / silver 1 mol) Sensitizing dye (S-2) 3.2 × 10 ^-4 (mol / silver 1 mol) Sensitizing dye (S-3) 3.2 × 10 ^-4 (mol / silver) 1 mol) Cyan coupler (C-1) 0.50 g Cyan coupler (C-2) 0.13 g Colored cyan coupler (CC-1) 0.07 g DIR compound (D-1) 0.006 g DIR compound (D-2 ) 0.55 g High boiling point solvent (Oil-1) 0.55 g Gelatin 1.0 g.

Fourth layer: high-sensitivity red-sensitive emulsion layer (RH) Silver iodobromide emulsion (average grain size 0.7 μm) 0.9 g (average iodine content 7.5 mol%) Sensitizing dye (S -1) 1.7 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-2) 1.6 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-3) 0.1 × 10 ^-4 (mol / silver 1 mol) Cyan coupler (C-2) 0.23 g Colored cyan coupler (CC-1) 0.03 g DIR compound (D-2) 0.02 g High boiling point solvent (Oil-1) 0.25 g gelatin 1.0 g.

Fifth layer: intermediate layer (IL-2) gelatin 0.8 g Sixth layer: low sensitivity green sensitive emulsion layer (G-1) Silver iodobromide emulsion (average grain size 0.4 μm) 0.6 g ( Average iodine content 8.0 mol%) Silver iodobromide emulsion (average grain size 0.3 μm) 0.2 g (Average iodine content 2.0 mol%) Sensitizing dye (S-4) 6.7 × 10 ^-4 (mol / silver 1 mol) Sensitizing dye (S-5) 0.8 x 10 ^-4 (mol / silver 1 mol) Magenta coupler (M-1) 0.17 g Magenta coupler (M-2) 0. 43 g Colored magenta coupler (CM-1) 0.10 g DIR compound (D-3) 0.02 g High boiling point solvent (Oil-2) 0.7 g Gelatin 1.0 g.

Seventh layer: high-sensitivity green-sensitive emulsion layer (GH) Silver iodobromide emulsion (average grain size 0.7 μm) 0.9 g (average iodine content 7.5 mol%) Sensitizing dye (S -6) 1.1 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-7) 2.0 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-8) 0.3 × 10 ^-4 (mol / silver 1 mol) Magenta coupler (M-1) 0.30 g Magenta coupler (M-2) 0.13 g Colored magenta coupler (CM-1) 0.04 g DIR compound (D-3) 0 0.004 g High boiling point solvent (Oil-2) 0.35 g Gelatin 1.0 g.

Eighth layer: Yellow filter layer (YC) Yellow colloidal silver 0.1 g Additive (HS-1) 0.07 g Additive (HS-2) 0.07 g Additive (SC-1) 0.12 g High Boiling point solvent (Oil-2) 0.15 g Gelatin 1.0 g.

Ninth layer: low-sensitivity blue-sensitive emulsion layer (B-1) Silver iodobromide emulsion (average grain size 0.3 μm) 0.25 g (average iodine content 2.0 mol%) Silver iodobromide emulsion (Average particle size 0.4 μm) 0.25 g (Average iodine content 8.0 mol%) Sensitizing dye (S-9) 5.8 × 10 ⁻⁴ (mol / silver 1 mol) Yellow coupler (Y-1) ) 0.6 g Yellow coupler (Y-2) 0.32 g DIR compound (D-1) 0.003 g DIR compound (D-2) 0.006 g Gelatin 1.3 g.

Tenth layer: high-sensitivity blue-sensitive emulsion layer (BH) Silver iodobromide emulsion (average grain size 0.8 μm) 0.5 g (average iodine content 8.5 mol%) Sensitizing dye (S −10) 3 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-11) 1.2 × 10 ⁻⁴ (mol / silver 1 mol) Yellow coupler (Y-1) 0.18 g Yellow coupler ( Y-2) 0.10 g High boiling point solvent (Oil-2) 0.05 g Gelatin 1.0 g.

Eleventh layer; First protective layer (PRO-1) Silver iodobromide (average particle size 0.08 μm) 0.3 g Ultraviolet absorber (UV-1) 0.07 g Ultraviolet absorber (UV-2) 0.10 g Additive (HS-1) 0.2 g Additive (HS-2) 0.1 g High boiling point solvent (Oil-1) 0.07 g High boiling point solvent (Oil-3) 0.07 g Gelatin 0.8 g.

Twelfth layer; Second protective layer (PRO-2) Compound A 0.04 g Compound B 0.004 g Polymethyl methacrylate (average particle size 3 μm) 0.02 g Methyl methacrylate: Ethyl methacrylate: Methacrylic acid = 3: 3: 4 (weight ratio) copolymer (average particle size 3 μm) 0.13 g Gelatin 0.5 g-Preparation of silver iodobromide emulsion-The silver iodobromide emulsion used in the 10th layer was prepared by the following method. I adjusted it with. A silver iodobromide emulsion was prepared by a double jet method using monodispersed silver iodobromide grains having an average grain size of 0.33 μm (silver iodobromide content of 2 mol%) as seed crystals.

A solution <G-1> having the following composition was treated at a temperature of 70 ° C.
While maintaining the pAg at 7.8 and pH at 7.0, 0.34 mol of a seed emulsion was added while stirring well.

(Formation of Internal High Iodity Phase-Core Phase) After that, a solution <H-1> having the following composition and a solution <S-
1> and 1> were added at an accelerated flow rate (the flow rate at the end was 3.6 times the initial flow rate) over 86 minutes while maintaining the flow rate ratio of 1: 1.

(Formation of External Low Iodity Phase-Shell Phase) Subsequently, while maintaining pAg 10.1 and pH 6.0, <H-
2> and <S-2> were added at a flow rate accelerated by a flow rate ratio of 1: 1 (the flow rate at the end was 5.2 times the initial flow rate) over 65 minutes.

The pAg and pH during grain formation were controlled using an aqueous potassium bromide solution and a 56% aqueous acetic acid solution. After the particles are formed, they are washed with water by a conventional flocculation method, and then gelatin is added to redisperse the mixture at 40 ° C.
PH and pAg at 5.8 and 8.06, respectively.
Was prepared.

The obtained emulsion had an average grain size of 0.80 μm,
Distribution is 12.4%, silver iodide content is 8.5 mol%
It was a monodisperse emulsion containing octahedral silver iodobromide grains.

<G-1> 100.0 g of ossein gelatin 10% by weight solution of compound-I in methanol 25.0 ml 28% aqueous ammonia solution 440.0 ml 56% aqueous acetic acid solution 660.0 ml Finish with water 5000.0 ml.

<H-1> Ocein gelatin 82.4 g Potassium bromide 151.6 g Potassium iodide 90.6 g Finish with water 1030.5 ml.

<S-1> Silver nitrate 309.2 g 28% aqueous ammonia solution Equivalent Finish with water 1030.5 ml.

<H-2> Ocein gelatin 302.1 g Potassium bromide 770.0 g Potassium iodide 33.2 g Finish with water 3776.8 ml.

<S-2> Silver nitrate 1133.0 g 28% aqueous ammonia solution Equivalent Finish with water 3776.8 ml.

For silver iodobromide emulsions used in emulsion layers other than the 10th layer, the average grain size of seed crystals,
The temperature, pAg, pH, flow rate, addition time, and halide composition were changed to prepare the above emulsions having different average grain sizes and silver iodide contents.

All were core / shell type monodisperse emulsions having a distribution of 20% or less. Each emulsion was subjected to optimum chemical ripening in the presence of sodium thiosulfate, chloroauric acid and ammonium thiocyanate to obtain a sensitizing dye, 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene. , 1-Phenyl-5-mercaptotetrazole was added.

The above-mentioned light-sensitive material further comprises compounds SU-1, Su-2, a viscosity adjusting agent, a film hardener H-1, and H-.
2, stabilizer ST-1, antifoggant AF-1, AF-2
(With a weight average molecular weight of 10,000 and 1,100,
000), dyes AI-1, AI-2 and compound DI-1 (9.4 mg / m ² ).

[0097]

[Chemical 15]

[0098]

[Chemical 16]

[0099]

[Chemical 17]

[0100]

[Chemical 18]

[0101]

[Chemical 19]

[0102]

[Chemical 20]

[0103]

[Chemical 21]

[0104]

[Chemical formula 22]

[0105]

[Chemical formula 23]

[0106]

[Chemical formula 24]

[0107]

[Chemical 25]

(Evaluation Method) The photographic light-sensitive materials prepared as described above were evaluated as described below, and the results are shown in Table 3 together.

<Preservability at high temperature> A photographic light-sensitive material heat-treated at 55 ° C for 5 days and a photographic light-sensitive material stored at room temperature for 5 days were exposed to white light through a step wedge for sensitometry and exposed. A film development process having the contents described in 1 was performed. Increase in fog of the heat-treated photographic light-sensitive material with respect to the non-heat-treated photographic light-sensitive material (ΔFog), and the heat-treated photograph when the sensitivity of the photographic light-sensitive material not heat-treated is 100. The relative sensitivity (S) of the light-sensitive material was measured.

<Winding curl recovery> Width 35 mm, length 12
The film having a diameter of 10 cm was wound around a core having a diameter of 10 mm, and the state was maintained at 55 ° C. and 20% RH for 72 hours. After that, release the film from the core and
After applying a load of g, immersing in a water bath at 38 ° C for 15 minutes, drying in a warm air dryer at 55 ° C for 15 minutes, removing the load, and measuring the length in a state of hanging naturally. The following three grades were evaluated from the ratio to the original length. In terms of the performance of the photographic support, it is preferable that the grade is Δ or higher.

Content of evaluation A: 70% or more, B: 50 to 70%, X: less than 50%.

<Colorimetric value of film: L, b> The lightness (L value) and chromaticity (b degree) were calculated from the transmittance when a photographic support was measured with a C light source and transmission according to the JIS standard. The equipment used is a Hitachi spectrophotometer (U-3200).

After the preparation of the light-sensitive material, the silver halide emulsion layer and / or the gelatin back layer on both sides coated on the support of the light-sensitive material is treated with bancreatin or an aqueous solution of sodium hypochlorite. Even if the support peeled off is similarly cut out and evaluated, almost the same colorimetric value can be obtained. Therefore, after the peeling in this way after the photosensitive material is prepared, the measured value of the film may be measured.

<Color Reproducibility and ΔL, Δb> A photosensitive photographic material is loaded into a camera and a Macbeth color checker (KOL
Three charts of the following colors shown in LMORGEN) were photographed.

Yellow, magenta, cyan After processing a photographic light-sensitive material according to a film developing process described later, it is printed on a commercially available color paper by an automatic print developing machine for printing, and a color for evaluation is obtained after printing under the conditions described below. Got a print.

The colorimetric value (L, b) is calculated from the reflectance when this print is measured by the Hitachi color analyzer 607 type by the reflection method under the C light source according to the JIS standard.

For comparison, the differences ΔL and Δb between the L value and the b value with respect to the values obtained by the same treatment with a commercially available color film (triacetate film) were determined, and the absolute value of the difference was 1 or more. At that time, since it can be evaluated as a significant difference, relative color reproduction was evaluated in the following three stages from each of yellow, magenta, and cyan. Of course, a grade of ○ is required for color reproducibility.

Evaluation of Color Reproducibility ◯: The number of items having a difference of 1 or more is 0, Δ: The number of items having a difference of 1 or more is 1 to 2 or less, and X: the item has a difference of 2 or more.

(Film development processing)

[0120]

[Table 1]

In Table 1, the replenishment amount is 1 m of the photographic light-sensitive material.
It is a value per ² . As the color developing solution, the bleaching solution, the fixing solution, the stabilizing solution and the replenishing solution thereof, those prepared as described below were used.

<Color developer> Water 800 ml Potassium carbonate 30 g Sodium hydrogen carbonate 2.5 g Potassium sulfite 3.0 g Sodium bromide 1.3 g Potassium iodide 1.2 mg Hydroxylamine sulfate 2.5 g Sodium chloride 0.6 g 4- Amino-3-methyl-N-ethyl-N- (β-hydroxylethyl) aniline sulfate 4.5 g Diethylenetriaminepentaacetic acid 3.0 g Potassium hydroxide 1.2 g Water was added to make 1 liter and potassium hydroxide or 20% The pH was adjusted to 0.06 with sulfuric acid.

<Color development replenisher> Water 800 ml Potassium carbonate 35 g Sodium hydrogen carbonate 3 g Potassium sulfite 5 g Sodium bromide 0.4 g Hydroxylamine sulfate 3.1 g 4-Amino-3-methyl-N-ethyl-N- (β -Hydroxylethyl) aniline sulfate 6.3 g Potassium hydroxide 2 g Diethylenetriaminepentaacetic acid 3.0 g Water was added to make 1 liter and potassium hydroxide or 20
The pH was adjusted to 10.18 with% sulfuric acid.

<Bleach> Water 700 ml 1,3-Diaminopropanetetraacetic acid iron (III) ammonium 125 g Ethylenediaminetetraacetic acid 2 g Sodium nitrate 40 g Ammonium bromide 150 g Glacial acetic acid 40 g Water was added to make 1 liter, and aqueous ammonia or glacial acetic acid Was used to adjust the pH to 4.4.

<Bleach replenisher> Water 700 ml 1,3 Diaminopropanetetraacetate iron (III) ammonium 175 g Ethylenediaminetetraacetic acid 2 g Sodium nitrate 50 g Ammonium bromide 200 g Glacial acetic acid 56 g pH adjusted to 4.0 using aqueous ammonia or glacial acetic acid After that, water was added to make 1 liter.

<Fixer> Water 800 ml Ammonium thiocyanate 120 g Ammonium thiosulfate 150 g Sodium sulfite 15 g Ethylenediaminetetraacetic acid 2 g After adjusting the pH to 6.2 using aqueous ammonia or glacial acetic acid, water was added to make 1 liter.

<Fixing Replenisher> Water 800 ml Ammonium thiocyanate 150 g Ammonium thiosulfate 180 g Sodium sulfite 20 g Ethylenediaminetetraacetic acid 2 g After adjusting the pH to 6.5 using aqueous ammonia or glacial acetic acid, water was added to make 1 liter.

<Stabilizer and stable replenisher> 900 ml of water

[0129]

[Chemical 25]

2.0 g Dimethylolurea 0.5 g Hexamethylenetetramine 0.2 g 1,2-Benzisothiazolin-3-one 0.1 g Siloxane (UC-L-77) 0.1 g Ammonia water 0.5 ml Water was added. After adjusting to 1 liter, a pH of 8 is obtained using aqueous ammonia or 50% sulfuric acid. 5 was prepared.

(Printing Process Step) The conditions of the printing process are as shown in Table 2.

[0132]

[Table 2]

<Color developer> Pure water 800 ml Triethanolamine 10 g N, N-diethylhydroxylamine 5 g Potassium bromide 0.02 g Potassium chloride 2 g Potassium sulfite 0.3 g 1-Hydroxyethylidene-1,1-diphosphonic acid 1. 0 g Ethylenediaminetetraacetic acid 1.0 g Catechol-3,5-disulfonic acid disodium salt 1.0 g Diethylene glycol 10 g N-ethyl-N-β-methanesulfonamidoethyl-3-methyl-4-aminoaminoline sulfate 4.5 g Fluorescence enhancement Whitening agent (4,4'-diaminostilbene sulfonic acid derivative) 1.0 g Potassium carbonate 27 g Water was added to adjust the total amount to 1 liter, and pH was adjusted to 10.10.

<Bleach-fixing solution> Ethylenediaminetetraacetic acid ferric ammonium dihydrate 60 g Ethylenediaminetetraacetic acid 3 g Ammonium thiosulfate (70% aqueous solution) 100 ml Ammonium sulfite (40% aqueous solution) 27.5 ml Water is added to make 1 liter. PH was adjusted to 5.7 with potassium carbonate or glacial acetic acid.

<Stabilizing Solution> 5-Chloro-2-methyl-4-isothiazolin-3-one 0.2 g 1.2-Benzisothiazolin-3-one 0.3 g Ethylene glycol 1.0 g 1-Hydroxyethylidene-1 , 1-Diphosphonic acid 2.0 g O-phenylphenol sodium 1.0 g Ethylenediaminetetraacetic acid 1.0 g Ammonium hydroxide (20% aqueous solution) 3.0 g Optical brightener (4,4′-diaminostilbene sulfonic acid derivative) 1 0.5 g of water was added to make the total amount 1 liter, and the pH was adjusted to 7.0 with sulfuric acid or potassium hydroxide.

Example 2 Dimethyl terephthalate 100
Parts by weight, and 64 parts by weight of ethylene glycol in an ethylene glycol solution of 5-sodium sulfodi (β-hydroxyethyl) isophthalic acid (abbreviation: SIP) (concentration 35
% By weight) 22 parts by weight (4 mol% / all ester bonds), polyethylene glycol (abbreviation: PEG) (number average molecular weight: 1,000) 11 parts by weight (8.5 parts by weight / polymer) and sodium acetate 0.05 Parts by weight, 0.13 parts by weight of phosphoric acid trimethyl ester, and Irganox 1010 of structural formula 2 (manufactured by CIBA-GEIGY) as an antioxidant are added so as to be 0.5% by weight with respect to the product polymer and mixed. did. Then, with stirring, manganese acetate hydrate and calcium acetate hydrate were used as catalysts in a molar ratio to dimetal terephthalate of 2 × 10 ^{−4, respectively.}
The amount of antimony trioxide added is 0.0
5 parts by weight were added.

Thereafter, the temperature was gradually raised and methanol was distilled at 170 ° C. in a nitrogen atmosphere and then depressurized to 270 ° C.
Polymerization was carried out at 5 mmHg and the intrinsic viscosity shown in Table 3 was 0.4.
A copolyester of No. 1 was obtained. A support having a film thickness of 70 μm was obtained in the same manner as in Example 1, and then an emulsion layer and an undercoat layer were similarly coated to prepare a light-sensitive material and evaluated in the same manner. The measurement results are shown in Table 3 (Sample No. 5 ′).

Unlike the present invention, even if melt polymerization is carried out using a mixture in which a copolymerization component is added before transesterification,
Even if the intrinsic viscosity is as low as 0.41 and the molecular weight of polyethylene glycol is different, the present invention having a color index value of the present invention within the range is useful as a photographic support. I know there is.

Example 3 The PEG of Example 1 was replaced with polytetramethylene glycol (PTG) (number average molecular weight: 30).
00), the polymerization temperature was 270 ° C., and a copolyester having a composition ratio shown in Table 3 was obtained as a co-polymerization component in the same manner. After preparing a photographic support in the same manner, a photographic light-sensitive material (No. 6 in Table 3) was obtained by applying an undercoat layer and an emulsion layer in the same manner as in the above-mentioned Examples.
Evaluation was performed by the same evaluation method as in Example 1, and the results are shown in Table 3.

Comparative Example 1 A copolymerized polyester having a copolymerization composition ratio shown in Table 3 was obtained in the same manner as in Example 1 except that the polymerization temperature in Example 1 (see Table 3) was changed. After preparing a photographic support in the same manner as in Example 1, the emulsion layer,
A backing layer was applied to prepare a light-sensitive material and evaluated in the same manner as in Example 1, and the results are shown in Table 3.

[0141]

[Table 3]

(Discussion) From the results shown in Table 3, a photographic support having an L value and ab value within the ranges specified in the present invention has excellent color reproducibility, good curl recovery and good photographic support. Since the mechanical strength is excellent even when the body is thinned, it can be subjected to automatic development processing by using an ordinary automatic developing machine, and it is understood that the photographic support of the present invention is extremely excellent.

No. 1 in the first embodiment. Referring to the results regarding 1 to 6, SIP is included, and further polyalkylene glycol, particularly polyethylene glycol is included, and as a composition ratio, SIP is 2 to 7 mol% (based on all ester bonds) and PEG is 3 to 10 wt% (polymer). On the other hand, it is found that a value of () is particularly effective as a photographic support.

On the other hand, No. 1 in Comparative Example 1 7, 9, 1
Referring to the results regarding No. 0, when the L value and the b value of the photographic support are out of the ranges specified in the present invention, the color reproducibility is poor and it is inappropriate. It can be seen that Nos. 8 and 11 are clearly inferior in curl recovery from the photographic support of the present invention.

As a result of evaluating the storability at high temperature, No. 1, which is Example 1 of the present invention, was evaluated. In Nos. 1 to 6, the increase in fog was 0.01 to 0.04 and the relative sensitivity was about 95 to 90, and the decrease in sensitivity was small, which is not a level that poses a practical problem.
It was confirmed that the emulsion characteristics were not adversely affected.

(Example 4) Dimethyl terephthalate 100
Parts by weight, 70 parts by weight of ethylene glycol, and dimethyl adipate were prepared and added so that a copolymer having a copolymerization composition ratio shown in Table 4 was obtained, and then 0.1 part by weight of calcium acetate hydrate was added. After the addition, transesterification reaction was carried out by a conventional method.

Each of the obtained products was mixed with an ethylene glycol solution of 5-sodium sulfodi (β-vidroxyethyl) isophthalic acid (concentration: 35% by weight) so that the composition ratio shown in Table 4 was obtained, and antimony trioxide 0 was added. 0.05 parts by weight and 0.13 parts by weight of phosphoric acid trimethyl ester were added.

Further, as in Example 1, Irganox 1
010 was added to 0.4% by weight based on the product polymer. Then, gradually raise the temperature and reduce the pressure to 280
Polymerization was performed at 0.5 ° C. and 0.5 mmHg to obtain a copolyester.

Using this copolymerized polyester, 150 ° C.
After vacuum drying at 280 ° C., melt extrusion was performed at 280 ° C. and rapid cooling and solidification on a cooling drum to produce an unstretched film. Using this unstretched film, it was stretched 3.3 times in the machine direction at 80 ° C. and further 3.3 times in the cross direction at 90 ° C.
It was heat set at 0 ° C. for 30 seconds to obtain a biaxially stretched film having a thickness of 70 μm.

Using this biaxially stretched film as a photographic support, a photographic light-sensitive material was prepared in the same manner as in Example 1 above.
Evaluation was performed by the same evaluation method as in Example 1, and the results are shown in Table 4.

Comparative Example 2 The polymerization temperature and the amount of dimethyl adipate (DMA) in Example 4 were changed (Table 4
Reference), and in the same manner as in Example 3, a copolymerized polyester having a copolymerization composition ratio shown in Table 4 was obtained. After preparing a photographic support in the same manner as in Example 3, a light-sensitive material was prepared by coating an emulsion layer and a back layer, and evaluated in the same manner as in Example 1.
The results are shown in Table 4.

[0152]

[Table 4]

(Discussion) From the results shown in Table 4, the photographic support having the L value and the b value within the ranges specified in the present invention has excellent color reproducibility and good curl recovery, It can be seen that it is extremely excellent as a support.

Further, in No. 4 of the fourth embodiment. The results shown in Nos. 12 to 15 include SIP and dimethyl adipate, and the composition ratio is about 2 to 7 mol% of SIP (based on all ester bonds) and 3 to 25 mol% of DMA.
It can be seen that the degree of (relative to the polymer) is particularly effective as a photographic support.

On the other hand, No. From the results of No. 17, if the L value and the b value of the photographic support are out of the ranges specified in the present invention, the color reproducibility is poor and unsuitable. No. Since No. 16 does not contain the SIP component, it is clear that the curl recovery property is clearly inferior to that of the present invention.

Example 5 Instead of 0.4% by weight of the antioxidant (Irganox 1010) in Example 1, the structural formula No. of the above-mentioned antioxidant was used. Irganox 245 (manufactured by CIBA-CEIGY) 0.2 shown by 1
A copolymerized polyester having a copolymerization composition ratio shown in Table 5 was obtained in the same manner as in Example 1 except that the weight% was added (Nos. 18 and 19 in Table 5). Using this copolymerized polyester, a photographic support was prepared in the same manner as in Example 1, and using this, a photographic light-sensitive material was obtained in the same manner as in Example 1, and the same as in Example 1. Evaluation was carried out by the evaluation method of No. 1 and the results are shown in Table 5.

[0157]

[Table 5]

(Discussion) From the results shown in Table 5, the photographic support having the L value and the b value within the ranges specified in the present invention shows the color reproducibility even if the kind and the blending amount of the antioxidant are changed. It was excellent and had good curl recovery. As a result of evaluating the storage stability at high temperature, it was confirmed that the increase in fog and the change in relative sensitivity were very small, which was not a problematic level for practical use and did not adversely affect the emulsion characteristics.
It can be seen that this photographic support does not adversely affect emulsion characteristics and photographic characteristics and is extremely excellent as a support for photographic light-sensitive materials.

(Example 6) The amount of the transesterification catalyst in Example 1 was changed to the amount shown in Table 6, and as the copolymerization component, SIP was 5 mol% with respect to the acid component, and PEG was with respect to all ester bond units. A copolyester was obtained at a polymerization temperature of 270 ° C. in the same manner as in Example 1 except that the content was changed to 7.5% by weight. Using this copolymerized polyester, a photographic support was prepared in the same manner as in Example 1, and using this, a photographic light-sensitive material was obtained in the same manner as in Example 1 above.
Evaluation was performed by the same evaluation method as in Example 1, and the results are shown in Table 6.

(Comparative Example 3) In the same manner as in Example 6, Table 6
A polymer having the composition ratio shown in was obtained. After the film was prepared in the same manner, a photosensitive material was prepared by coating an emulsion layer and a back layer, and the same evaluation results are shown in Table 6.

[0161]

[Table 6]

(Discussion) From the results shown in Table 6, the photographic support whose L value and b value are within the ranges specified in the present invention is excellent in color reproducibility even if the transesterification catalyst and the compounding amount are changed, and The habit recovery property is also good, and it is understood that it is extremely excellent as a support for a photographic light-sensitive material.

(Embodiment 7) No. 1 in the first embodiment. The same copolymerized polyester as 4 is manufactured by Bayer MACROL
A dye of EX (Blue RR) was added so as to be 1,500 ppm with respect to the copolyester, and a masterbatch was produced by a biaxial kneader. The masterbatch and the copolyester not containing the dye were blended in a weight ratio of 1: 9 to obtain a target dye concentration of 150 ppm, and then the same procedure as in Example 1 was performed. To produce a biaxially stretched film. Then, a photographic light-sensitive material was prepared in the same manner as in Example 1 and evaluated by the same evaluation method as in Example 1, and the results are shown in Table 7.

In this example, the light piping of the photographic light-sensitive material was evaluated as follows.

<Light Piping> The prepared unexposed light-sensitive material was packed in a cartridge and the tip was extended by 2 cm.
Leave exposed for 2 minutes under a light source of 000 lux. afterwards,
The film treatment described above is performed and the distance from the tip of the mouth of the patrone until the density change (fog) is recognized is measured.
A smaller photographic support is preferable, but there is no problem as long as it is about 15 mm or less. Commercially available color film is 8
It is about mm.

(Comparative Example 4) No. 1 in Comparative Example 1 10
A photographic support was prepared in the same manner as in Example 7, except that a copolyester having the same composition ratio as in Example 7 was used, and then a photographic light-sensitive material was prepared in the same manner as in Example 7. It evaluated similarly and the result was shown in Table 7.

[0167]

[Table 7]

(Discussion) From the results shown in Table 7, a photographic support having an L value and ab value within the ranges specified in the present invention has excellent color reproducibility even when a dye is added, and has good curl recovery property. In addition to the above, light piving is at a practically no problem level, and it is understood that it is extremely excellent as a support for a photographic light-sensitive material.

On the other hand, a copolyester having L and b values outside the range specified in the present invention (No. 10 of Example 1).
Even when a dye is added (No. 26), the color reproducibility is still deteriorated, and it is found that there is a practical problem as a photographic support.

[0170]

According to the present invention, a silver halide photographic light-sensitive material having excellent curl resolving ability and excellent photographic characteristics which do not adversely affect emulsion characteristics of a photograph and color reproducibility of a positive-working light-sensitive material. A photographic support suitable for the material can be provided.

Front Page Continuation (72) Inventor Kenji Nakanishi, Sakura Town, Hino City, Tokyo Konica Co., Ltd. (72) Inventor Yoshioki Okubo Yamaguchi Prefecture 2-33-5 Sosha Town, Hofu City Inventor Tetsutaro Hashimura Yamaguchi Prefecture 1751-15 Nitta, Hofu City (72) Inventor Hiroshi Naito 2265-5 Yoshikishi, Yamaguchi City, Yamaguchi Prefecture

Claims (3)

[Claims] 1. A copolymerized polyester having an aromatic dicarboxylic acid having a metal sulfonate group as a monomer unit and an antioxidant, and a color index L value of 93 or more and a color index b value of 3. A photographic support characterized by being: 2. The copolymerized polyester contains a polyalkylene glycol as a monomer unit, and the amount of the aromatic dicarboxylic acid having a metal sulfonate group, which is detected by hydrolyzing the copolymerized polyester, is: The photograph according to claim 1, wherein the amount of the polyalkylene glycol is 2 to 7 mol% based on the total ester bonds, and the polyalkylene glycol is contained in a ratio of 3 to 10 wt% based on the total weight of the reaction products. Support. 3. The copolymerized polyester has an aliphatic dicarboxylic acid as a monomer unit, and the amount of the aliphatic dicarboxylic acid, which is detected by hydrolyzing the copolymerized polyester, is equal to all ester bonds. The photographic support according to claim 1, wherein the content is 3 to 25 mol%.