JPH11143021A - Silver halide photographic sensitive material and magnetic recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the silver halide photographic sensitive material reduced in development stains and the magnetic recording medium reduced in development stains and occurrence of magnetic input and output errors by incorporating an ion-exchanging stratiform clay mineral. SOLUTION: The silver halide photographic sensitive material contains the cation-exchanging clay mineral, such as smectite and vermiculite, preferably, smectite, and fine conductive particles. The smectite clay mineral to be used may be natural or synthecized ones, and preferably, the synthecized ones. The fine particles to be used are fine conductive particles composed essentially of crystalline metal oxide and fine ionic cross-linkable polymer particles, and it is most preferred that the crystalline metal oxide is tin oxide doped with antimony from the view point of improvement of development stains and conductivity, and transparence among metal oxides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic material and a magnetic recording medium. More specifically, the present invention relates to a silver halide photographic light-sensitive material with reduced development stains, and a magnetic recording medium with reduced development stains and reduced occurrence of magnetic input / output errors.

[0002]

2. Description of the Related Art In recent years, silver halide photographic light-sensitive materials have been developed depending on the processing liquid and the condition of the squeeze roller of the processing apparatus, as the speed of development processing, the replenishment of processing solutions, and the size of processing apparatuses have been reduced. Dirt sometimes occurred.
In particular, after the washing of the final bath is completed, relatively large water droplets remain, and after drying, the silicate and calcium salts contained in the washing bath and other components contained in the treatment liquid are dried to form water droplets. Sometimes appeared. There is a problem that such development stains impair print quality.

[0003] Further, in the silver halide photographic light-sensitive material, the production process, photographing, development processing, print processing, and the like have been increasingly accelerated, so that static electricity is likely to be generated.

[0004] The generated static electricity not only causes dust and dirt to adhere, but when the generation is remarkable, a so-called static mark is formed on the photosensitive layer, resulting in a fatal defect.

As a technique effective in preventing such silver halide photographic materials from being charged, crystalline metal oxide fine particles such as ZnO, TiO ₂ , SnO ₂ , Al ₂ O ₃ , In ₂ O ₃ ,
In some cases, a layer containing SiO ₂ , MgO, MoO ₃ or the like is provided, and the technique is described in Japanese Patent Publication No. 61-15757. Although antistatic technology using such crystalline metal oxide fine particles is certainly effective, as higher image quality is required, transparency due to light scattering, improvement in image quality deterioration, and further cost reduction are required. It is desirable to reduce the use of metal oxides. Further, in recent years, US Pat.
No. 2,947, No. 4,279,945 or No. 4,
As described in JP-A-302,523, it is proposed to provide a transparent magnetic recording layer on the back surface of a silver halide photographic light-sensitive material. In silver halide photographic materials having a magnetic recording layer, there is the problem of causing instantaneous magnetic recording input / output errors due to attached debris and development stains. In some cases, a fatal problem such as an unusual magnetic recording input / output error occurs.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a silver halide photographic light-sensitive material having reduced development stains and a magnetic input / output error having reduced development stains. An object of the present invention is to provide a magnetic recording medium with reduced occurrence. It is still another object of the present invention to provide a magnetic recording medium having improved transparency without deteriorating conductivity, improved developability, reduced development contamination, and reduced occurrence of magnetic input / output errors.

[0007]

The above object of the present invention is achieved by the following constitution.

(1) A silver halide photographic material comprising a cation exchangeable layered clay mineral.

(2) A silver halide photographic light-sensitive material containing a cation-exchangeable layered clay mineral and conductive fine particles.

(3) The cation-exchangeable layered clay mineral is a smectite group clay mineral (1).
Or the silver halide photographic light-sensitive material according to (2).

(4) The conductive fine particles are antimony-doped tin oxide (2) or (3).
3. The silver halide photographic light-sensitive material described in 1. above.

(5) The silver halide photographic light-sensitive material according to any one of (1) to (4), wherein the amount of the cation exchangeable layered clay mineral is 0.5 to 100 mg / m ^2. material.

(6) In the layer containing the cation exchange layered clay mineral and the conductive fine particles, the ratio of the cation exchange layered clay mineral to the conductive fine particles is 0.1%.
(2) to (5), wherein the content is 1 to 3% by weight.
A silver halide photographic light-sensitive material according to any one of the above.

(7) A magnetic recording medium containing a cation exchangeable layered clay mineral.

(8) A magnetic recording medium comprising a cation-exchangeable layered clay mineral and conductive fine particles.

(9) The cation-exchangeable layered clay mineral is a smectite group clay mineral. (7)
Or the magnetic recording medium according to (8).

(10) The magnetic recording medium according to (8) or (9), wherein the conductive fine particles are antimony-doped tin oxide.

(11) The magnetic recording medium according to any one of (7) to (10), wherein the amount of the cation exchangeable layered clay mineral is 0.5 to 100 mg / m ² .

(12) In the layer containing the cation exchange layered clay mineral and the conductive fine particles, the ratio of the cation exchange layered clay mineral to the conductive fine particles is 0.1.
(8) to (11).
The magnetic recording medium according to any one of the above.

(13) A magnetic recording medium having a magnetic recording layer on the same surface as the surface having a layer containing a cation exchangeable layered clay mineral.

(14) A magnetic recording medium having a magnetic recording layer on the same side as the side having a layer containing a cation-exchangeable layered clay mineral and conductive fine particles.

(15) The cation exchange layered clay mineral is a smectite group clay mineral (1).
3) or the magnetic recording medium according to (14).

(16) The magnetic recording medium according to (14) or (15), wherein the conductive fine particles are antimony-doped tin oxide.

(17) A silver halide photographic material having a magnetic recording medium on the same side as the side having the layer containing the cation exchangeable layered clay mineral.

(18) A silver halide photographic light-sensitive material having a magnetic recording medium on the same side as the side having a layer containing a cation exchangeable layered clay mineral and conductive fine particles.

(19) The cation exchange layered clay mineral is a smectite group clay mineral (1).
7) or the silver halide photographic light-sensitive material according to (18).

(20) The silver halide photographic material as described in (18) or (19), wherein the conductive fine particles are antimony-doped tin oxide.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The present inventors have discovered that a silver halide photographic light-sensitive material having a layer containing a cation-exchangeable layered clay mineral is extremely effective against development stains generated during development. It is not clear what this cation-exchange layered clay mineral does, but it is possible that the cation-exchanged layered clay mineral behaves in a unique way by exchanging cations or coordinating water molecules. The present inventors consider that such a dirt during development may be captured and have a purifying action. The cation-exchangeable layered clay mineral used in the present invention is a type of layered silicate mineral in which a layer composed of an alkali metal cation and / or an alkaline earth metal cation and a water molecule coordinated thereto and a silicate layer are repeatedly arranged. is there. Mica is a layered silicate mineral with a similar structure.However, in cation exchange layered clay minerals, the negative charge of silicic acid is smaller than that of mica, and the bonding between layers is weak, so interlayer cations are exchangeable. In addition, water molecules easily enter between layers and easily coordinate with cations.

The cation-exchangeable layered clay mineral includes a smectite group or a vermiculite group clay mineral. In the present invention, a smectite group clay mineral is particularly preferably used. Smectite group clay minerals include natural montmorillonite, beidellite, nontronite and saponite, and any of these natural minerals can be used in the present invention. In many cases, synthetic smectite clay minerals that are not natural products are used in the present invention because they often have a slight effect on the photographic performance and are inferior in transparency and increase the cost of purification.

Examples of the synthetic smectite group clay mineral useful in the present invention include (D-1) Na _1/3 (Mg _8/3 Li _1/3 ) Si ₄ O ₁₀ (OH) ₂ (D-2) Na _1/3 Mg ₃ (Al _1/3 Si _11/3 ) O ₁₀ (OH) _{2 and the} like. These synthetic smectite-group clay minerals have a variety of sizes from about 1 μm, but in the present invention, the average particle size is preferably 0.5 μm or less, and particularly preferably 0.2 μm or less.

In the present invention, the cation-exchangeable layered clay mineral is used for a silver halide photographic light-sensitive material and a magnetic recording medium, and can also be used for a silver halide photographic light-sensitive material having a magnetic recording medium.

In the silver halide photographic light-sensitive material of the present invention, the effect of reducing the development stain is not lost even if the cation-exchangeable layered clay mineral is contained in either the light-sensitive layer or the non-light-sensitive layer. It is preferred to include it in the non-photosensitive layer which has little effect on the physical properties. The effect is sufficient if the amount of the cation-exchangeable layered clay mineral contained in all layers of the silver halide photographic material is 0.2 to 200 mg / m ² , but the effect is sufficient, but preferably 0.5 to 100 mg / m ^2. It is.

By using the cation-exchangeable layered clay mineral used in the present invention together with conductive fine particles, silver halide photographic light-sensitive materials can be imparted with both development stains and conductivity. It was possible to solve the concern that development stains are likely to appear. Improving conductivity by coexisting cation exchange layered clay mineral and antimony-doped tin oxide powder,
It is described in JP-A-8-319370. This is simply a water-based conductive gelatin dispersion of a cation-exchangeable layered clay mineral and antimony-doped tin oxide coated on the surface of a substrate (eg, a polyester film). No mention is made of the coating material of the recording medium, and only the antistatic effect is shown.

As described above, the second aspect of the present invention in which the cation-exchangeable layered clay mineral and the conductive fine particles are combined improves the development stain and the conductivity.

Examples of the conductive fine particles used in the present invention include conductive fine particles containing a crystalline metal oxide as a main component and ionic crosslinkable polymer fine particles as described below.

As the crystalline metal oxide used in the present invention, an oxygen-excess oxide such as Nb ₂ O _{5 + x} , RhO
Oxygen-deficient oxides such as _2-x and Ir ₂ O _3-x , or Ni
Non-stoichiometric hydroxides such as (OH) _x , HfO ₂ , Th
O ₂ , ZrO ₂ , CeO ₂ , ZnO, TiO ₂ , SnO ₂ ,
Al ₂ O ₃ , In ₂ O ₃ , SiO ₂ , MgO, BaO, Mo
O ₂ , V ₂ O ₅ or the like, or a composite oxide thereof is preferable,
Particularly, ZnO, TiO ₂ and SnO ₂ are preferable. Examples of including heteroatoms include, for example, Al and In for ZnO.
It is effective to add Nb, Ta, etc. to TiO _{2, and} to add (doping) Sb, Nb, halogen element, etc. to SnO ₂ . The addition amount (doping amount) of these different atoms is 0.01 mol% to 25 mol.
% Is preferred, but 0.1 mol% to 15 mol%
Is particularly preferred. Among these crystalline metal oxides, antimony-doped tin oxide is most preferable from the viewpoints of improvement in development stain, improvement in conductivity, and transparency. The average particle size of the crystalline metal oxide as the conductive fine particles is preferably 1 μm or less, more preferably 0.3 μm or less, and further preferably 0.1 μm or less. In addition, these crystalline metal oxide fine particles can be prepared by a method described in JP-A-56-143430. The attached amount of the crystalline metal oxide fine particles is preferably from 10 to 1000 mg / m ² .

The ionic crosslinkable polymer fine particles as other conductive fine particles used in the present invention are described in JP-B-60-4.
No. 5231, polymers having crosslinkable quaternary ammonium groups, such as copolymers [N,
N, N-trimethyl-N-vinylbenzylammonium chloride-co-divinylbenzene], JP-A-7-28
No. 194, a cross-linked ionene polymer, all of which are useful for the present invention. Here, an ionene polymer is a polymer having an ammonium group in the main chain by a quaternization reaction with a diamine and a compound such as dichloride that generates an ammonium group. A cross-linked ionene polymer is obtained by cross-linking an ionene-type unit or polymer. It refers to a crosslinked polymer in which a chain is formed or another monomer or polymer forms a crosslinked chain and contains an ionene-type portion. The methods for synthesizing these polymers are described in the above-mentioned patent gazettes, and can be synthesized according to these methods. Amount per ion crosslinked polymer microparticles 30mg / m ² ~1000mg / m ² is preferred.

When the layer containing the cation-exchangeable layered clay mineral of the present invention and the conductive fine particles is formed as one constituent layer of the silver halide photographic light-sensitive material, the conductive fine particles are formed independently as a conductive layer. It was found that a small amount showed effective conductivity. Although the mechanism is unclear, the probability that the conductive fine particles come into contact with each other via the water molecules or the hydroxyl groups contained in the structure in which the cation exchangeable layered clay mineral is coordinated around the conductive fine particles is increased. The present inventors speculate to further improve the conductivity. The state of adsorption of the cation-exchangeable layered clay mineral and the conductive fine particles is determined, for example, by diluting this dispersion to 1% by weight or less, applying a spin-coater to a hydrophilized silicon wafer, and applying a carbon coat. E
It can be analyzed and observed with a scanning electron microscope attached to a DS analyzer.

According to the observation results of the present inventors under an electron microscope,
It was observed that the cation exchangeable layered clay mineral seemed to be adsorbed on the conductive fine particles. As described above, the addition amount of the conductive fine particles when they coexist in the same layer is 20 to 7 as compared with the case where there is no cation exchange layered clay mineral.
0% at least equivalent conductivity can be obtained. By using a layer in which a cation exchangeable layered clay mineral and conductive fine particles coexist in at least one layer of a silver halide photographic light-sensitive material, there is no adhesion of dust or dust to a screen due to static electricity, and an error due to static electricity of a camera is caused. Excellent antistatic performance without operation. In addition, the presence of the cation-exchangeable layered clay mineral has the effect of reducing the development stain, while the conventional antistatic processed silver halide photographic material often causes development stain. It has been found that there is a synergistic effect of dirt reduction.

By using a layer in which a cation exchange layered clay mineral and conductive fine particles coexist as at least one layer of the magnetic recording medium of the present invention, the conductivity is improved, and input / output errors due to dust and dirt are reduced. It was found that it could be significantly reduced. In the case of a magnetic recording medium, the magnetic recording layer may be contained in any of constituent layers such as a protective layer and an undercoat layer,
Further, it may be formed as a constituent layer of a magnetic recording medium.

In addition, when the magnetic recording medium has the magnetic recording layer on the same surface as the surface having the layer containing the cation-exchangeable layered clay mineral and / or the conductive fine particles, the magnetic input / output error can be reduced on the other surface. The magnetic input / output error can be reduced more than in the above case, which is preferable. Also in the case of a silver halide photographic light-sensitive material having a magnetic recording medium, it is preferable to provide a layer containing a cation exchange layered clay mineral and conductive fine particles on the same surface as the surface having a magnetic recording layer, The same effect as that of the magnetic recording medium can be obtained, and the occurrence of input / output errors due to development contamination on the magnetic recording layer is less likely to occur. This is a great improvement for silver halide photographic materials having a magnetic recording medium.

In the magnetic recording medium of the present invention, the cation exchange layered clay mineral is preferably applied so as to be 0.5 to 100 mg / m ^2, and contains the cation exchange layered clay mineral and conductive fine particles. In the layer, the content is preferably 0.1 to 3% by weight based on the conductive fine particles.

To prepare a conductive fine particle dispersion of the conductive fine particles having the cation exchangeable layered clay mineral adsorbed thereon by coexisting the cation exchangeable layered clay mineral and the conductive fine particles of the present invention, Can be obtained by adding a cation-exchangeable layered clay mineral to the mixture and further dispersing it. It is preferable to add 0.1 to 3% by weight of the cation exchangeable layered clay mineral to the conductive fine particles in order to make the adsorption effective. This dispersion can be performed by a usual method such as ultrasonic dispersion, a media mill such as a sand mill and a ball mill, and a pin mill. For dispersion, a dispersant such as an anionic surfactant, a cationic surfactant, an amphoteric surfactant or a nonionic surfactant may be added as necessary. The amount of the dispersant added is 2% by weight based on the conductive fine particles.
It is preferable that

The coating solution in which the cation-exchangeable layered clay mineral and the conductive fine particles of the present invention coexist may be prepared in an aqueous processing solution or an organic solvent system depending on the application, but an aqueous system is preferred. Organic solvent to improve coatability,
For example, alcohols such as methanol, ethanol, and isopropanol, or acetone may be added.

The cation-exchangeable layered clay mineral of the present invention is
As a binder for forming a layer containing a cation exchangeable layered clay mineral and conductive fine particles as a constituent layer of a silver halide photographic material or a magnetic recording medium, a silver halide photographic material or a magnetic recording medium is conventionally used. A known binder used in a medium can be used.

As the hydrophilic binder used in the silver halide photographic light-sensitive material, for example, Research Disclosure (RD) 17643, pages 26 and 18716
Examples thereof include water-soluble polymers, cellulose ethers, latex polymers, and water-soluble polyesters described on page 651.

Examples of the water-soluble polymer include gelatin, gelatin derivatives, casein, agar, sodium alginate,
Starch, polyvinyl alcohol, acrylic acid-based copolymer, maleic anhydride copolymer, and the like.Examples of cellulose ether include carboxymethylcellulose, hydroxyethylcellulose, and the like, and latex polymer includes vinyl chloride-based copolymer. And latexes such as vinylidene chloride-based copolymers, acrylate-based copolymers, vinyl acetate-based copolymers, and butadiene-based copolymers. The most preferred of these is gelatin. Gelatin may be non-denatured or denatured. In addition, a part of colloidal albumin, casein, carboxymethylcellulose, cellulose derivatives such as hydroxyethylcellulose, agar,
Sodium alginate, starch derivatives, sugar derivatives such as dextran, synthetic hydrophilic colloids such as polyvinyl alcohol, poly N-vinylpyrrolidone, acrylic copolymers, polyacrylamide or derivatives thereof, partial hydrolysates, gelatin derivatives, etc. May be replaced with. The above-mentioned hydrophilic binder can also be used for the magnetic recording layer.

The main binders used in the magnetic recording layer include known thermoplastic resins, radiation-curable resins, thermosetting resins, other reactive resins, and mixtures thereof, which are conventionally used for magnetic recording media. Can be used. The thermoplastic resin has a glass transition point Tg of −40 ° C.
The temperature is 150 ° C., preferably 60 ° C. to 120 ° C., and the weight average molecular weight is preferably 10,000 to 300,000, and more preferably the weight average molecular weight is 50,000 to 200,000.

The binder of the magnetic recording layer according to the present invention preferably contains, as the thermoplastic resin, a cellulose ester as a main component, specifically, cellulose diacetate, cellulose acetate butyrate, cellulose acetate propionate, or the like. Cellulose acetate; cellulose nitrate; cellulose sulfate; and mixed esters thereof, among which cellulose diacetate, cellulose acetate butyrate, cellulose acetate propionate, and particularly cellulose diacetate.

The binder of the silver halide photographic material or the magnetic recording material used in the present invention may be hardened. Examples of the hardener include aldehyde compounds, ketone compounds, compounds having a reactive halogen, compounds having a reactive olefin, N-hydroxymethylphthalimide, N-methylol compounds, isocyanates, and aziridine compounds. , Acid derivatives, epoxy compounds, halogen carboxaldehydes and inorganic compound hardeners. Of these, isocyanates are preferred. Examples of isocyanate hardeners include tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, and dimers and trimers thereof (for example, Millionate series, manufactured by Nippon Urethane Co., Ltd.). (E.g., Coronate series, manufactured by the company). The hardener is usually used in an amount of 0.01
-30% by weight, preferably 0.05-20% by weight.

The cation-exchange layered clay mineral is preferably 0.1 to 50% by weight and the conductive fine particles are preferably 5 to 90% by weight based on the binder used in the silver halide photographic material or the magnetic recording material of the present invention.

The magnetic powder is dispersed in a binder using a solvent, if necessary, to form a coating solution. For dispersion of the magnetic powder, a ball mill, a homomixer, a sand mill, or the like can be used. In this case, it is preferable that the magnetic particles are dispersed and dispersed as much as possible without damaging the magnetic particles.

In the case of forming an optically transparent magnetic recording layer, the binder is used in an amount of 1 to 1 part by weight of the magnetic powder.
It is preferable to use 20 parts by weight. More preferably,
It is 2 to 15 parts by weight per 1 part by weight of the magnetic powder. The solvent is used in such an amount that the coating can be easily performed.

The thickness of the magnetic recording layer is preferably from 0.1 to 10 μm, more preferably from 0.2 to 5 μm, even more preferably from 0.5 to 3 μm.

As the support used for the silver halide photographic material or the magnetic recording material of the present invention, a support generally used as a silver halide photographic material or a magnetic recording material can be used. For example, polyester-based supports such as polyethylene terephthalate (hereinafter abbreviated as PET), polyethylene-2,6-naphthalate (hereinafter abbreviated as PEN), and modified polyester. A cellulose ester-based support such as cellulose triacetate (hereinafter abbreviated as TAC) can be used.

The TAC support useful for the silver halide photographic light-sensitive material of the present invention is generally a high-viscosity (100 to 1000 poise) viscous liquid (doped with TAC cotton) in a mixed solvent of methylene chloride and an alcohol such as methanol. This is cast on a stainless steel belt running from a die having a slit of a predetermined width or a rotating metal drum, and heated and dried. In the meantime, it is peeled off from the belt or drum in a dry state, and then dried while being conveyed by a tenter or a roll to obtain a TAC film support. The TAC support is now widely used as a color roll film support because the curl after the processing such as development is easily eliminated.

The polyester support used in the present invention will be described. The polyester support used in the present invention is a polyester containing a dicarboxylic acid component and a diol component as main components.

The main dicarboxylic acid component is terephthalic acid and / or 2,2-dicarboxylic acid component in view of transparency, mechanical strength and dimensional stability.
As the 6-naphthalenedicarboxylic acid and the diol component, a polyester containing ethylene glycol and / or 1,4-cyclohexanedimethanol as a main component is preferable. Among them, polyethylene terephthalate, polyethylene-2,6-naphthalate, terephthalic acid and 2,2
Polyesters comprising a polyester comprising 6-naphthalenedicarboxylic acid and ethylene glycol and a mixture of two or more of these polyesters as main constituents are preferred. When an ethylene terephthalate unit and / or an ethylene-2,6-naphthalate unit is contained in an amount of 70% by weight or more with respect to the polyester, a film having excellent transparency, mechanical strength, dimensional stability and the like can be obtained. .

As long as the effects of the present invention are not impaired, the polyester constituting the polyester film used in the present invention may be further copolymerized with another copolymer component or may be mixed with another polyester. May be.

The polyester used in the present invention preferably contains a dye for the purpose of preventing the light piping phenomenon. Dyes to be compounded for such purposes are not particularly limited in type, but it is necessary to have excellent heat resistance in film production, and anthraquinone-based and perinone-based dyes are used. No. Further, as the color tone, gray dyeing is preferable as seen in general silver halide photographic light-sensitive materials.

The thickness of the polyester film is not particularly limited, but is preferably from 20 to 125 μm.

The haze of the polyester film is preferably 3% or less. More preferably 1%
It is as follows. When the haze is more than 3%, when the film is used as a support for a silver halide photographic light-sensitive material, an image printed on a photographic paper becomes blurred and unclear.
The haze is measured according to ASTM-D1003-52.

The glass transition point Tg of the polyester film used in the present invention is preferably 60 ° C. or higher, more preferably 70 ° C. or higher and 150 ° C. or lower. Tg is determined by measuring with a differential scanning calorimeter. When the Tg is in this range, a photosensitive material having no deformation of the film in the drying step of the development processor and having a small curl after development can be obtained.

The polyester film used in the present invention can be produced by a conventionally known method.

The undercoat layer of the support used in the silver halide photographic light-sensitive material of the present invention will be described. The undercoat layer is a layer adjacent to the support and has a function of firmly adhering the support and the upper material, and differs depending on the properties of the material of the support or the upper material. In general, the undercoating is for adhesion of a gelatin layer such as an emulsion layer, but can be similarly applied to the conductive layer and the magnetic recording layer used in the present invention. In addition, conductivity can be imparted to the undercoat layer, and the undercoat layer can also serve as the conductive layer.

Examples of the undercoating material of the TAC support include gelatin, polyvinyl alcohol, partially acetalized polyvinyl alcohol, hydrophilic resins such as vinyl acetate-maleic anhydride copolymer, and cellulose ester resins such as cellulose diacetate and cellulose nitrate. And these may be used alone or as a mixture. A solvent-based subbing liquid is used for the TAC support. Solvents useful for subbing TAC supports include acetone, methyl ethyl ketone, methanol, isopropanol, methylene chloride, ethylene chloride, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether,
1-methoxy-2-propanol, ethyl acetate,
Dimethylformamide or the like can be used, and it is preferable to mix and use these as needed.

The timing of applying the undercoat layer to the TAC support is at any time during the production of the TAC support, from immediately after peeling to winding, or at any point after the winding. Alternatively, an antistatic layer and an upper layer thereof can be applied.

Examples of subbing materials for polyester-based supports include polyester, polyamide, polyurethane, vinyl-based copolymer, butadiene-based copolymer, acrylic-based copolymer, vinylidene-based copolymer, and epoxy-based copolymer. These may be used alone or as a mixture.

The timing of applying the undercoat layer to the polyester-based support is generally performed before or after stretching during film formation of the support.

Further, since the surface of the polyester-based support is hydrophobic, it is possible to supplement the wettability and adhesiveness by performing various surface treatments in advance. Such surface treatments include surface activation treatments such as corona discharge treatment, flame treatment, ultraviolet treatment, high frequency treatment, glow discharge treatment, active plasma treatment, and laser treatment, as well as resorcinol, phenols, alkalis, amines, and trichloro. An etching method using a chemical such as acetic acid may be used.

Among the surface activation treatments, the corona discharge treatment is the most well-known method, and any of the conventionally known methods, for example, JP-B-48-5043 and JP-B-47-5.
1905, JP-A-47-28067 and JP-A-49-83
No. 769, No. 51-41770, No. 51-13157
It can be achieved by the method disclosed in each gazette such as No. 6.

The discharge frequency is 50 Hz to 5000 kHz,
Preferably, a frequency of 5 kHz to several 100 kHz is appropriate. If the discharge frequency is too low, stable discharge cannot be obtained, and pinholes occur in the object to be processed, which is not preferable. On the other hand, if the frequency is too high, a special device for impedance matching is required, which increases the price of the device, which is not preferable. Regarding the treatment strength of the object to be treated, 0.001 kV · A · min / m ² -5
kV · A · min / m ^2, preferably 0.01 kV · A · min / m ² ~1kV · A · min / m ^2, is suitable. The gap clearance between the electrode and the dielectric roll is 0.5-2.5m
m, preferably 1.0 to 2.0 mm.

In many cases, glow discharge treatment, which is the most effective surface treatment, can be performed by any of the conventionally known methods, for example, Japanese Patent Publication Nos. 35-7578 and 36-10336.
No. 45-22004, No. 45-22005, No. 45
-24040 and 46-43480 or JP-A-5
No. 3-129262, U.S. Pat. No. 3,057,79.
No. 2, 3,057,795 and 3,179,482
Nos. 3,288,638 and 3,309,299
Nos. 3,424,735 and 3,462,335
Nos. 3,475,307 and 3,761,299, and British Patent 997,093 can be used. The glow discharge treatment conditions are generally as follows: a pressure of 0.005 to 20 Torr, preferably 0.02 to 2 T
orr is appropriate. If the pressure is too low, the effect of the surface treatment is reduced. If the pressure is too high, an excessive current flows, sparks are likely to occur, which is dangerous, and there is a possibility that the object to be treated may be destroyed. The discharge is generated by applying a high voltage between metal plates or metal rods arranged at one or more spaces in a vacuum tank. This voltage can take various values depending on the composition and pressure of the atmospheric gas, but usually within the above pressure range, stable steady glow discharge occurs between 500 and 5000V. A particularly suitable voltage range for improving the adhesion is from 2000 to 4000V.
As the discharge frequency, as seen in the prior art,
Direct current to several 1000 MHz, preferably 50 Hz to 20
MHz is appropriate. Regarding the discharge treatment strength, 0.01 kV · A · min / m is obtained because desired adhesion performance is obtained.
^{2 to 5} kV · A · min / m ² , preferably 0.15 kV · A
Min / m ^{2 to 1} kV · A · min / m ² is appropriate.

Next, the magnetic recording medium will be described. As the magnetic fine powder used in the magnetic recording layer of the magnetic recording medium, metal magnetic powder, iron oxide magnetic powder, Co-doped iron oxide magnetic powder, chromium dioxide magnetic powder, barium ferrite magnetic powder, etc. are used. it can. Methods for producing these magnetic powders are known, and the magnetic powders used in the present invention can be produced according to known methods.

The shape and size of the magnetic powder are not particularly limited, and can be widely used. The shape may be any shape such as a needle shape, a rice grain shape, a spherical shape, a cubic shape, and a plate shape, but the needle shape and the plate shape are preferable in terms of electromagnetic conversion characteristics. There are no particular restrictions on the crystallite size and specific surface area. The magnetic powder may be surface-treated. For example, the material may be surface-treated with a substance containing an element such as titanium, silicon, or aluminum, or may be an adsorption having a nitrogen-containing heterocyclic ring such as carboxylic acid, sulfonic acid, sulfate ester, phosphonic acid, phosphate ester, and benzotriazole. It may be treated with an organic compound such as an acidic compound. The pH of the magnetic powder is not particularly limited, but is preferably in the range of 5 to 10.

Regarding the size of the particles of the magnetic powder, there is a correlation between the size and the transparency, "Television", Vol. 20, No. 2, "Characteristics of Ultrafine Translucent Magnetic Recording Medium". Its application ". For example, γ-F
In the needle-like powder of e ₂ O _3, the light transmittance is improved by reducing the particle size.

US Pat. No. 2,950,971 describes that a magnetic layer composed of magnetic iron oxide dispersed in a binder transmits infrared light, and US Pat. No. 4,279,945. The specification describes that, even when the concentration of magnetic particles in the magnetic layer is relatively high, reducing the particle size improves the transmittance of helium-neon laser light having a wavelength of 632.8 nm.

However, when a magnetic recording layer is provided in an image forming area of a silver halide color photographic light-sensitive material, the light transmittance of not only a red area but also a green area and a blue area must be high.

In order to increase the light transmittance in the red, green and blue regions, the particle size of the magnetic particles is reduced and the amount of the magnetic particles applied is also limited.

If the particle diameter of the magnetic particles is reduced to a certain level or less, required magnetic characteristics cannot be obtained. Therefore, it is preferable to reduce the particle size of the magnetic powder as long as necessary magnetic characteristics can be obtained. Also, if the coating amount of the magnetic particles is reduced to a certain level or more, the required magnetic characteristics cannot be obtained. Therefore, it is preferable to reduce the amount in a range where the required magnetic characteristics can be obtained.

Practically, the coating amount of the magnetic powder is 0.0
01 to 3 g / m ² , and more preferably 0.01 to 1
g / m ² .

Various additives such as lubricants may be added to the coating solution for forming the magnetic recording layer in order to impart functions such as imparting lubricity and improving friction and abrasion characteristics to the magnetic recording layer. Can be. In addition, in addition to the coating liquid, for example, a plasticizer to give flexibility to the magnetic recording layer, a dispersant to help disperse the magnetic material in the coating liquid, to prevent clogging of the magnetic head Abrasive can be added.

If necessary, a protective layer may be provided on the outermost layer adjacent to the magnetic recording layer to improve the scratch resistance. For imparting scratch resistance, a compound generally known as a slipping agent can be used, and a higher fatty acid ester is preferable. In the case where the magnetic recording layer is provided in a stripe shape, a transparent polymer layer containing no magnetic substance may be provided thereon to eliminate a step due to the magnetic recording layer.
In this case, the transparent polymer layer may have the various functions described above.

The silver halide emulsion of the silver halide photographic light-sensitive material of the present invention is, for example, Research Disclosure (hereinafter abbreviated as “RD”) No. 17643, 22-
Page 23 (December 1978) "I. Emulsion Production (Emul
sion prepara-tion and type
es) "and No. 18716, p. 648, Grafkid," Physics and Chemistry of Photography ", published by Paul Montell (P.G.
rafkides, Chemic et Physiq
ue Photographique, Paul Mo
ntel, 1967), Duffin, "Photographic Emulsion Chemistry", published by Focal Press (GF Duffin, Photo).
optic EmulsionChemistr
y, Focal Press 1966), Zerikman et al., "Production and Coating of Photographic Emulsions", published by Focal Press (VL Zelikman et al, Making).
and Coating Photographic
Emulsion, Focal Press, 196
It can be prepared using the method described in 4).

The emulsions are described in US Pat. Nos. 3,574,628 and 3,665,394 and British Patent 1,413,
The monodispersed emulsion described in Japanese Patent No. 748 is also preferable.

The silver halide emulsion can be subjected to physical ripening, chemical ripening and spectral sensitization. The additive used in such a process is RDNo. No. 17643, ibid.
18716 and the same No. 308119 (hereinafter RD17643, RD18716 and RD308119, respectively)
Abbreviated).

When the silver halide photographic light-sensitive material of the present invention is a silver halide color photographic light-sensitive material, photographic additives which can be used are also described in the above RD. In addition, various couplers can be used, and specific examples thereof are also described in RD17643 and RD308119.

Further, these additives are RD308119
It can be added to a photographic light-sensitive layer by a dispersion method described in section XIV on page 1007.

The silver halide color photographic light-sensitive material can be provided with an auxiliary layer such as a filter layer or an intermediate layer described in the aforementioned RD308119 II-K.

When the silver halide color photographic light-sensitive material is constituted, various layer constitutions such as a forward layer, a reverse layer and a unit constitution described in the aforementioned RD308119VII-K can be employed.

To develop the silver halide photographic light-sensitive material of the present invention, for example, H. James, Theory of the Photographic Process 4th Edition (The
Theory of The Photographic
Process Forth Edition) 2
Pages 91-334 and Journal of the American Chemical Society (Journal of the A
merchandise Chemical Society)
Vol. 73, p. 3,100 (1951), a developer known per se can be used. Further, the color photographic light-sensitive material is RD17643 28 described above.
29 pages, RD18716 pages 615 and RD3081
Development processing can be performed by the usual method described in 19 XIX.

[0093]

EXAMPLES The present invention will be described below in detail with reference to examples, but embodiments of the present invention are not limited thereto.

Example 1 [Application of Undercoat Layer] A corona discharge treatment of 12 W · min / m ² was applied to both sides of a PET film having a thickness of 100 μm, and an undercoating coating solution B-1 was dried to a thickness of 0.2 μm. To form an undercoat layer B-1 and further 12 W · min on it.
/ M subjecting ² of the corona discharge treatment was applied so that the lower引塗coating solution B-2 to a dry film thickness of 0.1 [mu] m, the subbing layer B-2
Thus, an undercoated PET film was obtained.

<Undercoat Coating Solution B-1> Epocross K-2020E (solid content 40%, Nippon Shokubai Co., Ltd.) 50 g Compound (UL-1) 0.2 g Finished with water 1000 ml <Undercoat Coating Solution B-2> Gelatin 10 g Compound (UL-1) 0.2 g Compound (UL-2) 0.2 g Silica particles (average particle size 3 μm) 0.1 g Hardener (UL-3) 1 g Cation exchangeable layered clay minerals are listed in Table 1. Prepare as described Finish with water 1000 ml.

[0096]

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[Coating and Preparation of Silver Halide Photosensitive Material]
On one side of a subbed polyethylene terephthalate support, a silver halide emulsion of the following formula 1 was added in an amount of 2.9 g / g.
m ² and a gelatin amount of 1.2 g / m ^2, and a coating solution of the following formula 2 as a protective layer on the emulsion layer and the protective layer at the same time so that the gelatin amount becomes 0.6 g / m ^2. Multi-layer coating was performed. On the other side, the back layer of the following formulation 3 was adjusted so that the amount of gelatin was 0.6 g / m ^2, and the protective layer of the back layer of the following formulation 4 was further reduced to 0.2 g / m ² .
Each of them was coated simultaneously so as to be 4 g / m ² to obtain a photographic material sample 101 for silver halide printing.

<Formulation 1, Composition of Coating Solution for Silver Halide Emulsion Layer> (C-1) Sensitizing Dye 0.6 mg / m ² (H-1) Hydrazine Compound 30 mg / m ² (C-2) Amino Compound 50 mg / M ² (C-3) Surfactant 100 mg / m ² (C-4) Latex polymer 1.0 g / m ² (C-5) Hardener 30 mg / m ² Sodium-isoamyl-n-decyl sulfosuccinate 0.7 mg / m ² 2-mercapto-6-hydroxypurine 10 mg / m ² EDTA 50 mg / m ² <Formulation 2, Composition of emulsion protective layer> Gelatin 0.6 g / m ² Sodium-isoamyl-n-decyl sulfosuccinate 12 mg / m ² matting agent: average particle size 3.5μm monodisperse silica ^{25mg / m 2 (C-6} ) hardener ^{30mg / m 2 (C-7} ) surfactant 1 mg / m ² colloidal Rushirika (average particle size 0.05μm) 20mg / m ² <Formulation 3, the back layer composition> Gelatin 0.6 g / m ² Sojuumu - isoamyl -n- decyl sulfosuccinate ^{5mg / m 2 (C-4} ) latex polymer 0 0.3 g / m ² colloidal silica (average particle size 0.05 μm) 70 mg / m ² sodium polystyrene sulfonate 20 mg / m ² (C-8) Hardener 100 mg / m ² <Formulation 4, back layer protective layer composition> Gelatin 0.4 g / m ² matting agent: monodispersed polymethyl methacrylate having an average particle size of 5 μm 50 mg / m ² sodium di (2-ethylhexyl) sulfosuccinate 10 mg / m ² (C-7) surfactant 1 mg / m ² (C -9) Dye 20 mg / m ² H- (OCH ₂ CH ₂ ) ₆₈ -OH 50 mg / m ² (C-6) Hardener 15 mg / m ² Polysiloxane 0 0.7 g / m ²

[0099]

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[0100]

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Sample 1 was prepared in the same manner as 101 except that a cation-exchangeable layered clay mineral was added as shown in Table 1.
Nos. 02 to 111 were produced. The prepared samples were evaluated for development stain and haze by the following methods.

[Standard Processing Conditions] Step Temperature Time Immersion time in liquid Developing 28 ° C. 30 seconds 26 seconds Fixing 28 ° C. 26 seconds 22 seconds Washing 18 ° C. 18 seconds 18 seconds Drying 45 ° C. 14 seconds Total 66 seconds Each step time is the next step The soaking time in the liquid includes the so-called wadding transfer time up to and does not include the wading transfer time. [Developer solution formulation] <Composition A> Pure water (ion-exchanged water) 150 ml Ethylenediaminetetraacid disodium salt 2 g Diethylene glycol 50 g Potassium sulfite (55% W / V aqueous solution) 100 ml Potassium carbonate 50 g Hydroquinone 15 g 5-methylbenzotriazole 200 mg 1 -Phenyl-5-mercaptotetrazole 30 mg Potassium hydroxide Amount for adjusting the pH of the working solution to 10.6 Potassium bromide 4.5 g <Composition B> Pure water (ion-exchanged water) 3 ml Diethylene glycol 50 mg Ethylenediaminetetraacid disodium salt 25 mg Acidic acid (90% aqueous solution) 0.3 ml 5-Nitroindazole 110 mg 1-phenyl-3-pyrazolidone 500 mg When using a developer, dissolve in order of the above composition A and composition B in 500 ml of water in order and finish to 1 liter. It was.

[Formulation of Fixing Solution] <Composition A> Ammonium thiosulfate (72.5% W / V aqueous solution) 230 ml Sodium sulfite 9.5 g Sodium oxyacid trihydrate 15.9 g Boric acid 6.7 g Sodium citrate dihydrate salt 2g acid acid (90% W / V aqueous solution) 8.1 ml <composition B> pure water (ion-exchanged water) 17 ml sulfuric acid (50% W / V aqueous solution) 5.8 g aluminum sulfate (Al ₂ O ₃ in terms of content of 8 (1% W / V aqueous solution) 26.5 g When the fixing solution was used, it was dissolved in 500 ml of water in the order of the above composition A and composition B, and finished to 1 liter. The pH of the fixing solution was about 4.3.

(Evaluation of Development Stain) When the washing under the above development conditions was completed, the sample was taken out without squeezing, suspended, and naturally dried at 23 ° C. and 55% RH.
The water mark of the dried sample was evaluated by visual observation according to the following criteria.

1: None 2: Very slight 3: Somewhat 4: Somewhat more 5: Very much.

(Evaluation of Transparency (Haze)) An unexposed sample was developed under the following conditions, and the haze was measured by Tokyo Denshoku TURBID.
The evaluation was performed using ITYMETER model T-2600DA.

Table 1 shows the results of the evaluation.

[0108]

[Table 1]

(Evaluation Results) Table 1 shows that the present invention containing the cation-exchangeable layered clay mineral has almost no development stain.

Example 2 [Preparation of Support] To 100 parts by weight of dimethyl 2,6-naphthalenedicarboxylate and 60 parts by weight of ethylene glycol, 0.1 part by weight of calcium acetate hydrate as a transesterification catalyst was added. A transesterification reaction was performed according to 0.05 parts by weight of antimony trioxide and 0.03 parts by weight of trimethyl phosphate were added to the obtained product. Then gradually raise the temperature and reduce the pressure, 290 ° C, 0.05 mmH
Polymerization was performed under the conditions of g to obtain polyethylene-2,6-naphthalate having an intrinsic viscosity of 0.60.

This was vacuum-dried at 150 ° C. for 8 hours, melt-extruded in a layer form from a T-die at 300 ° C., brought into close contact with a cooling drum at 50 ° C. while applying static electricity, cooled and solidified, and an unstretched sheet was obtained. Obtained. This unstretched sheet was stretched 3.3 times in the machine direction at 135 ° C. using a roll-type longitudinal stretching machine.

The obtained uniaxially stretched film was stretched in a first stretching zone at 145 ° C. by 50% of the total transverse stretching ratio using a tenter type transverse stretching machine, and further at a second stretching zone at 155 ° C. at a total transverse stretching ratio of 3. The film was stretched three times. Then 1
Heat treatment at 00 ° C. for 2 seconds,
Heat set at 0 ° C. for 5 seconds, 1 second at 240 ° C.
Heat set for 5 seconds. Next, the film was gradually cooled to room temperature over 30 seconds while relaxing in a transverse direction by 5% to obtain a polyethylene naphthalate film having a thickness of 85 μm.

This is wound around a stainless steel core, and
The support was prepared by heat treatment at 10 ° C. for 48 hours.

12 W · min / m ^{2 on} both sides of the support
And applying the undercoating coating solution B-1 described above so as to have a dry film thickness of 0.2 μm.
And a corona discharge of 12 W · min / m ² was applied thereon, and the undercoating coating solution B-2 was coated on one side with a dry film thickness of 0.1 μm.
m to form an undercoat layer B-2.
Is coated with a conductive layer coating solution E-1 containing conductive fine particles shown in Table 2 below in a wet film thickness of 10 μm to form a conductive layer E-1, which is then heat-treated at 110 ° C. for 2 minutes. A subbed support was obtained. The drying was 100
C. for 10 seconds.

<Conductive Layer Coating Solution E-1> Gelatin 10 g Compound (UL-1) 0.4 g Hardener (UL-3) 0.75 g The conductive fine particles and the cation exchange layered clay mineral are described in Table 2. Prepared with water 1000 ml Provided on the surface of the undercoat layer B-2 of the undercoated support film was the same silver halide color photographic emulsion layer as Konica Color JX400, a negative color film commercially available from Konica Corporation. Further, on the conductive layer E-1, the magnetic recording layer M-1 (magnetic recording layer coating solution M-1, dry film thickness 1.2 μm) and the sliding layer O-1 (sliding layer coating solution O-1, drying (Thickness: 0.2 μm) to obtain samples 201 to 211 of silver halide color photographic materials having a transparent magnetic recording medium. Sample 20
Cation-exchangeable layered clay mineral (D-
A magnetic recording medium sample 212 was obtained in the same manner except that 10 mg / m ^{2 of} 1) was added.

0.1 Torr, O _{2 on} both sides of another support
Partial pressure 70%, discharge frequency 20kHz, output 2500W,
A glow discharge treatment is performed at a treatment intensity of 0.5 kV · A / m ² for 5 seconds, and the undercoating coating solution B-3 shown below is applied to one surface to a dry film thickness of 0.2 μm, and the undercoating layer B -3, and a conductive layer coating solution E-2 was applied to the opposite surface at a dry film thickness of 10 μm to form a conductive layer E-2, followed by heat treatment at 110 ° C. for 2 minutes, and further provided B-3. Konica color JX on the surface
The same silver halide color emulsion layer as that of the conductive layer E
Similarly, the magnetic recording layer M-1 and the sliding layer O-
No. 1 was applied to obtain a silver halide color photographic material sample 213 having a transparent magnetic recording medium.

As shown in Table 2, as the conductive fine particles, samples 209 and 210 used a crosslinked type ionene polymer (Formula 4, P-1), and sample 211 used niobium-doped titanium oxide. .

[0118]

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<Undercoat Coating Solution B-3> Gelatin 10 g Water 24 g Salicylic acid 3 g Methanol 1 g Polyamide epichlorohydrin resin (Chem. 5) 3 g UL-1 1 g

[0120]

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<Conductive coating solution E-2> Gelatin 10 g Water 270 g Methanol 600 g Conductive fine particles (Table 2) Cation exchange layered clay mineral (Table 2) UL-1 1 g Polyamide epichlorohydrin resin 3 g <Magnetic recording layer coating solution M -1> magnetic material (Co-coated γ-Fe203, coercive force 900 Oe, surface area 40 m ² / g, major axis 0.15 μm, minor axis 0.03 μm) 4.8 parts by weight cellulose diacetate (binder) acetylation degree 55%, weight average molecular weight 180,000 100.0 parts by weight of tolylene diisocyanate MR-400 17.0 parts by weight abrasive particles _{A (r 2 / r 1 =} 1.1, A1 2 0 3, center particle size 0.8μm 1.2 parts by weight Acetone 1130.0 parts by weight Cyclohexanone 280.0 parts by weight <Sliding layer coating solution O-1> Carnauba wax 7 g Toluene 700 g methyl ethyl ketone 300 g The thus obtained sample was evaluated for development stain, magnetic reading error, conductivity, and haze by the following methods.

[Development Processing] Color development 3 minutes 15 seconds 38.0 ± 0.1 ° C. Bleaching 6 minutes 30 seconds 38.0 ± 3.0 ° C Rinse 3 minutes and 15 seconds 24-41 ° C 4. 6 minutes 30 seconds 38.0 ± 3.0 ℃ 5. Washing with water 3 minutes 15 seconds 24-41 ° C 6. Stability: 3 minutes 15 seconds 38.0 ± 3.0 ° C 7. Drying: 50 ° C or less The composition of the processing solution used in each step is shown below.

[Color developing solution] 4-amino-3-methyl-N-ethyl-N- (β-hydroxyethyl) aniline sulfate 4.75 g anhydrous sodium sulfite 4.25 g hydroxylamine 1/2 sulfate 2 0.0 g anhydrous potassium carbonate 37.5 g sodium bromide 1.3 g nitrilotriacetic acid / sodium salt (monohydrate) 2.5 g potassium hydroxide 1.0 g Add water to make 1 liter (pH = 10.1) [ Bleaching Solution] Ammonium ethylenediaminetetraacetate (III) ammonium salt 100.0 g Ethylenediaminetetraacetic acid diammonium salt 10.0 g Ammonium bromide 150.0 g Glacial acetic acid 10.0 g Water was added to make 1 liter, and the pH was adjusted to 6.0 using ammonia water. Adjust to 0.

[Fixing Solution] Ammonium thiosulfate 175.0 g Anhydrous sodium sulfite 8.5 g Sodium metasulfite 2.3 g Water was added to 1 liter, and the pH was adjusted to 6.0 with acetic acid.

[Stabilizing Solution] Formalin (37% aqueous solution) 1.5 ml KONIDAX (manufactured by Konica Corporation) 7.5 ml (Evaluation of development stain) When the processing of the stable solution under the following developing conditions was completed, the sample was not squeezed. Was taken out, suspended and air-dried at 23 ° C. and 55% RH. The trace of the water droplet of the dried sample was visually observed, and the determination was made based on the criteria of Example 1.

(Evaluation of Magnetic Reading Error) Evaluation is made after inputting 100 times in the method disclosed in International Patent Application Publication No. WO 90-04205 and performing development processing in the same manner as development stains. Was done.

(Evaluation of Conductivity) The sample was left under an environment of 23 ° C. and 55% RH for 12 hours. Then, under the same environment, Teraohmmeter model VE- manufactured by Kawaguchi Electric Co., Ltd.
Using No. 30, the surface resistivity was measured.

(Evaluation of Devitrification (Haze)) Poick integrating sphere turbidimeter SEP-PT-50 manufactured by Mitsubishi Kasei Kogyo Co., Ltd.
In 1D, light was incident from the side on which the magnetic recording layer was provided, and its devitrification (turbidity) was measured.

Table 2 shows the evaluation results.

[0130]

[Table 2]

(Results) From the results, it is understood that the sample of the present invention can remarkably reduce development stain. Further, it can be seen that the magnetic recording medium is excellent with almost no magnetic input / output errors.

Further, Samples 202 to 205 of the present invention containing a cation exchangeable layered clay mineral and conductive fine particles as compared with Comparative Sample 201 are excellent in conductivity in addition to reducing development stains and magnetic input / output errors. And the ratio of the cation exchangeable layered clay mineral to the conductive fine particles is 0.1 to
Samples 202 to 204, which are 3% by weight, are more preferable because higher conductivity can be obtained without deterioration in transparency.

In addition, the amount of the conductive fine particles was compared with that of Comparative Sample 2.
The conductivity of the comparative sample 208, which is １ ／ of that of the sample No. 01, is deteriorated, but the samples 206, 207 and 213 of the present invention containing the cation exchange layered clay mineral and the conductive fine particles are used.
It can be seen that the sample has excellent conductivity, is free from development stains, has reduced magnetic input / output errors, and has improved transparency.

Further, cross-linked ionene polymers and niobium-doped titanium oxide were used as the conductive fine particles in the samples 209 to 211, but the samples 209 and 211 of the present invention show the same excellent effects as described above.

Further, it can be seen that the sample 212 of the present invention in which the cation-exchangeable layered clay mineral was added to the magnetic layer was free from development stains and the magnetic input / output was significantly improved.

[0136]

According to the present invention, a silver halide photographic light-sensitive material free from development stains, a magnetic recording medium free from magnetic input / output errors, and a magnetic recording medium free from development dirt, hardly dusted, and free from magnetic input / output errors. A silver halide photographic light-sensitive material having a cation-exchangeable layered clay mineral and / or
Alternatively, it can be obtained by incorporating conductive fine particles.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G03C 7/00 510 G03C 7/00 510 G11B 5/633 G11B 5/633 5/708 5/708

Claims (20)

[Claims] 1. A silver halide photographic material comprising a cation exchangeable layered clay mineral. 2. A silver halide photographic light-sensitive material comprising a cation-exchangeable layered clay mineral and conductive fine particles. 3. The silver halide photographic light-sensitive material according to claim 1, wherein the cation-exchangeable layered clay mineral is a smectite group clay mineral. 4. The silver halide photographic material according to claim 2, wherein the conductive fine particles are antimony-doped tin oxide. 5. The silver halide photographic light-sensitive material according to claim 1, wherein the amount of the cation-exchangeable layered clay mineral is 0.5 to 100 mg / m ² . 6. The layer containing the cation exchange layered clay mineral and the conductive fine particles, wherein the ratio of the cation exchange layered clay mineral to the conductive fine particles is 0.1 to 0.1.
The silver halide photographic material according to any one of claims 2 to 5, wherein the content is 3% by weight. 7. A magnetic recording medium comprising a cation-exchangeable layered clay mineral. 8. A magnetic recording medium comprising a cation-exchangeable layered clay mineral and conductive fine particles. 9. The magnetic recording medium according to claim 7, wherein the cation-exchangeable layered clay mineral is a smectite group clay mineral. 10. The magnetic recording medium according to claim 8, wherein the conductive fine particles are antimony-doped tin oxide. 11. The magnetic recording medium according to claim 7, wherein the amount of the cation-exchangeable layered clay mineral is 0.5 to 100 mg / m ² . 12. The layer containing the cation exchange layered clay mineral and the conductive fine particles, wherein the ratio of the cation exchange layered clay mineral to the conductive particles is 0.1 to 3%.
The magnetic recording medium according to any one of claims 8 to 11, wherein the content is% by weight. 13. A magnetic recording medium having a magnetic recording layer on the same side as the side having a layer containing a cation exchangeable layered clay mineral. 14. A magnetic recording medium having a magnetic recording layer on the same side as a layer having a layer containing a cation exchangeable layered clay mineral and conductive fine particles. 15. The cation-exchangeable layered clay mineral is a smectite-group clay mineral.
15. The magnetic recording medium according to 3 or 14. 16. The method according to claim 14, wherein the conductive fine particles are antimony-doped tin oxide.
3. The magnetic recording medium according to claim 1. 17. A silver halide photographic material having a magnetic recording medium on the same side as the side having a layer containing a cation exchangeable layered clay mineral. 18. A silver halide photographic light-sensitive material having a magnetic recording medium on the same surface as a surface having a layer containing a cation exchangeable layered clay mineral and conductive fine particles. 19. The cation-exchangeable layered clay mineral is a smectite group clay mineral.
19. The silver halide photographic material as described in 7 or 18. 20. The method according to claim 18, wherein the conductive fine particles are antimony-doped tin oxide.
3. The silver halide photographic light-sensitive material described in 1. above.