JPH09281677A - Processing of magnetic recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing method of a magnetic recording medium to prevent clogging in a magnetic head without influencing magnetic characteristics or travelling property, and to provide such a magnetic recording medium that also has a photographic layer comprising a color photosensitive material having a multilayered structure and that prevents clogging in a magnetic head. SOLUTION: A magnetic recording medium having a magnetic recording layer on one surface of a transparent supporting body and having at least one photographic layer on the other surface is subjected to exposure for an image and to magnetic recording, and then the medium is developed. In this process, the medium is processed with a processing liquid containing a compd. expressed by formula I or II. I: H(-O-R1 -)n1 -O-R2 , wherein R1 is 2 or 3C alkylene group, R2 is 8 to 25C alkyl or aryl group and n1 is an integer 12 to 30. II: H(-O-R3 -)n2 -O-R4 , wherein R3 is 2C or 3C alkylene group, R4 is 16C to 25C alkyl group or aryl group and n2 is an integer 7 to 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a magnetic recording medium having a magnetic recording layer, and more particularly to a method for treating a magnetic recording medium in which clogging of a magnetic head is reduced.

[0002]

2. Description of the Related Art A magnetic recording medium generally reads and writes information with a magnetic head, and it is necessary that the magnetic recording medium and the magnetic head are always in an optimum environment in order to input and output information quickly and accurately. However, the contact between the surface of the magnetic head and the magnetic recording medium formed by dispersing the magnetic particles mainly composed of iron oxide in the synthetic polymer binder and the magnetic head made of metal causes dust, dust, Dust or components of the magnetic recording medium may adhere to cause clogging, which may hinder information input / output.

[0003] These problems are almost completely eliminated by cleaning the magnetic head.
Even if it is effective against dust, dust, and dust, it is not perfect against the adhesion of components of the magnetic recording medium. Further, the preparation of the cleaning member and the trouble of the cleaning still exist.

In recent years, in silver halide color photographic light-sensitive materials, in order to more efficiently and accurately perform development processing after photographing (image exposure) and printing on photographic paper, silver halide color information is recorded. There is a proposal to use it effectively by recording it on a photosensitive material.

US Pat. No. 4,947,196 and WO 90/04254 disclose a roll-shaped film and a magnetic head having a magnetic layer containing magnetic particles for magnetic recording on the back surface of a photographic film. An imaging camera having the same is disclosed. According to the above-described improved technology, the identification information of the type and maker of the photosensitive material, information on the conditions at the time of photographing, information on the customer, information on the printing conditions, information on the conditions for additional printing, etc. are recorded on the magnetic layer on the film. By magnetically inputting / outputting the data, it is possible to improve the print quality, increase the efficiency of the printing operation, increase the efficiency of the lab work, and the like.

That is, it can be said that the magnetic recording medium is provided on one side of the support, and the photographic constituent layer is provided on the other side of the support to provide an epoch-making recording medium having both magnetic information and optical image information.

However, it has been clarified that there is a problem of clogging of the magnetic head and that new clogging occurs due to the photographic constituent layers and the development processing thereof. It is difficult to completely deal with the problem with the conventional cleaning means alone, and it is not preferable to deal with the increase of the amount of the polishing agent in the magnetic recording medium because the magnetic characteristics, the running property and the transparency are deteriorated. There is a demand for a fundamental improvement focusing on the processing method of the magnetic recording medium.

[0008]

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a method of treating a magnetic recording medium in which clogging of a magnetic head is prevented without affecting magnetic characteristics and running properties. Another object of the present invention is to provide a magnetic recording medium which prevents clogging of a magnetic head even if the magnetic recording medium also has a photographic constituent layer of a multi-layer color photosensitive material.

[0009]

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

(1) A magnetic recording medium having a magnetic recording layer on one side of a transparent support and at least one photographic constituent layer on the other side is subjected to image exposure and magnetic recording and then subjected to development processing. A method for treating a magnetic recording medium, which comprises treating with a treatment liquid containing a compound represented by the following general formula (1) or (2).

General formula (1) H (-O-R _1- ) _{n 1} -O-R ₂ [wherein R ₁ represents an alkylene group having 2 or 3 carbon atoms, and R ₂ has a total carbon number of 8 or more 25 The following alkyl group or aryl group is represented. n ₁ represents an integer of 12 or more and 30 or less. ] Formula (2) H (-O-R 3 -) in _n2 -O-R ₄ [wherein, R ₃ represents an alkylene group having 2 or 3 carbon atoms, R ₄ is 25 or less carbon atoms in total 16 or more Represents an alkyl group or an aryl group. n ₂ represents an integer of 7 or more and 11 or less. (2) The method for processing a magnetic recording medium according to (1), wherein the processing solution is the final stabilizing solution in the processing step of the silver halide photosensitive material.

(3) A photographic structure having a magnetic recording layer on one side of a transparent support and at least one red-sensitive layer, green-sensitive layer, blue-sensitive layer and non-photosensitive layer on the other side. When a magnetic recording medium having a layer is subjected to imagewise exposure and magnetic recording and then subjected to development treatment, the above-mentioned general formula (1)
Alternatively, a method for treating a magnetic recording medium is characterized by treating with a treatment liquid containing the compound represented by (2).

Hereinafter, the present invention will be described in detail.

The compound represented by formula (1) or (2) will be described.

In the above general formula (1), R ₁ represents an alkylene group having 2 or 3 carbon atoms, and R ₂ represents an alkyl group or an aryl group having 8 or more and 25 or less carbon atoms, preferably 10 or more and 20 or less carbon atoms. Show. n ₁ represents an integer of 12 or more and 30 or less, preferably 12 or more and 25 or less, and particularly preferably 12 or more and 20 or less. If n ₁ is smaller than 12, the effect of the present invention cannot be obtained. Further, if n ₁ is larger than 30, or if the carbon number of R ₂ is less than 8 or larger than 25, the original effect as a surfactant is reduced, which is not preferable.

In the general formula (2), R ₃ represents an alkylene group having 2 or 3 carbon atoms, and R 4 has 16 or more carbon atoms and 2
5 or less, preferably an alkyl or aryl group having 16 to 20 carbon atoms. n ₂ represents an integer of 7 or more and 11 or less. If n is less than 7 or the carbon number of R ₄ is less than 16, the effect of the present invention cannot be obtained. If n ₂ is larger than 11 or the carbon number of R ₄ is larger than 25, the original effect as a surfactant is reduced, which is not preferable.

In the compound represented by the general formula (1) or (2), the HLB value is preferably 15 or more and 19 or less.

In the present invention, a preferred compound group corresponding to the general formula (1) is propylene glycol monooctyl ether (n ₁ = 1)
2 to 30) polyethylene glycol monododecyl ether (n ₁ =
12-30) Polyethylene glycol monooctyl phenyl ether (n ₁ = 12-30) Polyethylene glycol monononyl phenyl ether (n ₁ = 12-30) Polyethylene glycol-3-methyl-4-octyl phenyl ether (n ₁ = 12-) 30) Polyethylene glycol monocetyl ether (n ₁ = 1)
2 to 30) Polyethylene glycol monostearyl ether (n ₁
= 12 to 30) Polyethylene glycol monooleyl ether (n ₁ =
12 to 30) Propylene glycol monododecyl phenyl ether (n ₁ = 12 to 30) Particularly preferred compounds corresponding to the general formula (1) in the present invention are: Propylene glycol monooctyl ether (n ₁
= 15) 2. Polyethylene glycol monododecyl ether (n
₁ = 23) 3. Polyethylene glycol monododecyl ether (n
₁ = 25) 4. Polyethylene glycol monooctyl phenyl ether (n ₁ = 20) 5. Polyethylene glycol monononyl phenyl ether (n ₁ = 15) 6. Polyethylene glycol monononyl phenyl ether (n ₁ = 18) 7. Polyethylene glycol monononyl phenyl ether (n ₁ = 20) 8. Polyethylene glycol-3-methyl-4-octyl phenyl ether (n ₁ = 12) 9. Polyethylene glycol monocetyl ether (n ₁
= 20) 10. Polyethylene glycol monostearyl ether (n ₁ = 20) 11. Polyethylene glycol monooleyl ether (n ₁ = 20) 12. Propylene glycol monododecyl phenyl ether (n ₁ = 25) In the present invention, a preferable compound group corresponding to the general formula (2) is polyethylene glycol monocetyl ether (n ₂ = 7).
~ 11) Polyethylene glycol monostearyl ether (n ₂
= 7 to 11) Polyethylene glycol monooleyl ether (n ₂ =
7-11) propylene glycol-3,4-heptyl phenyl ether (n ₂ = 7-11) Particularly preferred compounds of the formula (2) in the present invention, 13. Polyethylene glycol monocetyl ether (n
₂ = 11) 14. Polyethylene glycol monostearyl ether (n ₂ = 8) 15. Polyethylene glycol monooleyl ether (n ₂ = 7) 16. Polyethylene glycol monooleyl ether (n ₂ = 10) 17. Propylene glycol-3,4-diheptyl phenyl ether (n ₂ = 8) For these compounds see British Patent 1,281,6
No. 19, JP-A-56-132338 and the like.

In the present invention, the processing solution for the magnetic recording medium is preferably the final stabilizing solution in the processing step of the silver halide photosensitive material. Regarding this stabilizing solution or stabilizing treatment, JP-A-57-8543, JP-A-58-14843,
No. 60-220345 and the like. In the stabilizing solution, in addition to the compound of the present invention, an aldehyde compound or an aldehyde-releasing compound for stabilizing a dye image, a surfactant, a pH buffer, an optical brightener, a preservative, a hardener,
Preservatives, defoamers, water softeners, etc. are appropriately contained. The stabilizing solution is replenished with a new solution according to its use, and the so-called multi-stage countercurrent system can effectively perform the stabilizing treatment.

The amount of the compound represented by the general formula (1) or (2) of the present invention added to the stabilizing solution is usually 0.01 g or more and 5 g or less, or 0.05 g or more and 2 g per liter of the stabilizing solution.
The following is preferable, and 0.1 g or more and 1 g or less is particularly preferable.

The representative examples of the processing steps incorporating the stabilizing solution processing are shown below, but the invention is not limited thereto.

Hardening-Neutralization-Development-Water washing-Fixing-Water washing-Stable Development-Water washing-Fixing-Water washing-Stable Development-Neutralization-Water washing-Fixing-Water washing-Stable Development Fixing-Water washing-Stable Magnetic recording in the present invention The processing solution for the medium is preferably the final stabilizing solution in the processing step of the silver halide color light-sensitive material. The processing steps of silver halide color light-sensitive materials are widely known, but the basic steps are a color development step containing an aromatic primary amine color developing agent, a bleaching step containing a bleaching agent, and a fixing step containing a fixing agent. Therefore, a water washing step, a neutralization step, an adjusting step, etc. may be included between each treatment. Further, the bleaching step and the fixing step may be combined to form a bleach-fixing step. Further, when reversing a color image, a black and white developing step is first performed in which only silver halide is developed.

The representative examples of the color processing steps incorporating the stabilizing solution processing are shown below, but the invention is not limited thereto.

Color development-bleach-fix-wash-stable Color development-bleach-fix-stable Color development bleach-fix-wash-stable Color development-bleach-fix-wash-stable Color development-bleach-wash-fix-wash-stable development -Washing-reversal-color development-bleach-fixing-washing-stable development-washing-reversal-color development-adjustment-bleaching-fixing-washing-stable In the present invention, the magnetic information of the magnetic recording layer is read by a magnetic head. It was unexpected from the prior art that the clogging of the magnetic head was reduced by paying attention to the surfactant in the processing solution for the silver halide photosensitive material and selecting a specific surfactant. That is amazing.

The photographic material of the present invention includes, for example, the type / manufacturing number, maker name, emulsion No. of the photographic light-sensitive material. Various information on photographic materials such as, for example, shooting date and time,
Aperture, exposure time, lighting conditions, filters used, weather,
Various information at the time of camera shooting such as size of shooting frame, model of shooting machine, use of anamorphic lens, for example, print number, selection of filter, customer's color preference, trimming frame size, etc. In order to input various information necessary at the time, such as the number of prints, selection of filters, customer's color preference, similar various information obtained at the time of printing such as trimming frame size, and other customer information,
A magnetic recording layer may be provided.

In the present invention, the magnetic recording layer is preferably coated on the side opposite to the photographic constituent layer of the support, and the undercoat layer, the antistatic layer (conductive layer) and the magnetic layer are formed in this order from the side of the support. It is preferable that the recording layer and the sliding layer are formed.

As the magnetic fine powder used in the magnetic recording layer, metal magnetic powder, iron oxide magnetic powder, Co-doped iron oxide magnetic powder, chromium dioxide magnetic powder, barium ferrite magnetic powder, etc. can be used. . The method for producing these magnetic powders is known and can be produced according to a known method.

The optical density of the magnetic recording layer is preferably small considering the influence on photographic images, and is 1.5 or less, more preferably 0.2 or less, and particularly preferably 0.1 or less. The optical density is measured by Konica Sakura Densitometer P
Using DA-65, using a filter that transmits blue light, light having a wavelength of 436 nm is vertically incident on the coating film,
According to a method of calculating light absorption by the coating film.

The amount of magnetization of the magnetic recording layer per 1 m ² of the light-sensitive material is preferably 3 × 10 ^-2 emu or more. The amount of magnetization was measured by using an external magnetic field of 1000 in a coating direction of a coating film having a fixed volume using a sample vibration magnetometer (VSM-3) manufactured by Toei Industry.
The magnetic flux density (residual magnetic flux density) when the external magnetic field is reduced to 0 after saturation with Oe once is measured, and this is converted into the volume of the transparent magnetic layer contained per 1 m ² of the photographic light-sensitive material. You can ask. If the amount of magnetization per unit area of the transparent magnetic layer is smaller than 3 × 10 ⁻² emu, input / output of magnetic recording is hindered.

The thickness of the magnetic recording layer is 0.01 to 20 μm.
It is preferably from 0.05 to 15 μm, more preferably from 0.1 to 10 μm.

As the binder forming the magnetic recording layer, vinyl resins, cellulose ester resins, urethane resins, polyester resins and the like are preferably used. It is also preferable to form the binder by aqueous coating using an aqueous emulsion resin without using an organic solvent. Further, it is necessary to adjust physical properties of the binder by curing with a curing agent, heat curing, electron beam curing, or the like. In particular, curing by adding a polyisocyanate type curing agent is preferable.

It is necessary to add an abrasive to the magnetic recording layer in order to prevent clogging of the magnetic head, and it is preferable to add non-magnetic metal oxide particles, especially alumina fine particles.

Examples of the support for the magnetic recording medium include polyester films such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), cellulose triacetate film, cellulose diacetate film, polycarbonate film, polystyrene film, polyolefin film and the like. You can
In particular, JP-A-1-244446 and JP-A-1-291248.
No. 1-298350 No. 2-89045 No. 2
No. 93641, No. 2-181749, No. 2-214
When a polyester having a high water content as shown in JP-A Nos. 852 and 2-291135 is used, even if the support is thinned, the curl recovery property after the development processing is excellent.

The supports preferably used in the present invention are PET and PEN. When these are used, the thickness is preferably 50 to 100 μm, particularly preferably 60 to 90 μm.

The magnetic recording medium of the present invention comprises ZnO, V
₂ O ₅ , TiO ₂ , SnO ₂ , Al ₂ O ₃ , In ₂ O ₃ , SiO
_It is preferred to have a conductive layer containing metal oxide particles such as ₂ , MgO, BaO, MoO ₃ , which form donors for those containing oxygen vacancies and for the metal oxide used. Those containing a small amount of heteroatoms are generally preferred because of their high conductivity, and the latter are particularly preferred because they do not give fog to the silver halide emulsion.

As the binder for the conductive layer and the undercoat layer, the same binder as used for the magnetic recording layer can be used.

Further, it is preferable to coat higher fatty acid ester, higher fatty acid amide, polyorganosiloxane, liquid paraffin, waxes, etc. on the magnetic recording layer as a sliding layer.

When the magnetic recording medium of the present invention is formed into a roll, not only the size of a camera or a cartridge can be reduced, but also resources can be saved and a storage space for a developed negative film can be reduced. Therefore, the film width is about 20 to 35 mm, preferably 20 to 30 mm. If the photographing screen area is also in the range of about 300 to 700 mm ² , and preferably in the range of 400 to 600 mm ² , the small format can be made without deteriorating the quality of the final photographic print, and the size of the patrone can be reduced more than before, and the camera Can be reduced in size. In addition, the aspect ratio (aspect ratio) of the shooting screen is not limited, and is 1: 1 of the conventional 126 size.
It can be used for various types such as 1, half-size 1: 1.4, 135 (standard) size 1: 1.5, high-vision type 1: 1.8, panorama type 1: 3.

When the magnetic recording medium of the present invention is used in the form of a roll, it is preferable that it is housed in a cartridge. The most common cartridge is the current 135 format patrone. In addition, 58-67329, 58-195236
And JP-A-58-181035 and 58-18263.
No. 4, U.S. Pat. No. 4,221,479;
No. 1045, No. 2-170156, No. 2-19945
No. 1, 2-124564, 2-201441,
2-205584, 2-210346, 2-
No. 211443, No. 2-214853, No. 2-264
No. 248, No. 3-37645, No. 3-37646,
U.S. Pat. Nos. 4,846,418 and 4,848,69
Nos. 3,832,275 and the like can be used. Further, the present invention can be applied to "Small photographic roll film cartridge and film camera" in JP-A-5-210201.

In the present invention, the silver halide emulsion is represented by Research Disclosure 308119 (hereinafter RD308).
119) can also be used in combination. The places to be described are shown below.

[Item] [Page of RD308119] Iodine structure 993 IA Item Manufacturing method 〃 〃 and 994 E Item Crystal habit (normal crystal) 〃 〃 Crystal habit (〃 〃 Epitaxial 〃 〃 Halogen composition (uniform) ) 993 IB term Halogen composition (not uniform) 〃 〃 Halogen conversion 994 IC term Halogen substitution 〃 〃 Metal-containing 994 ID Section monodispersed 995 IF Section solvent addition 〃 Latent image forming position (surface) ) 995 I-G item Latent image forming position (inside) 〃 〃 Applied sensitizing material (negative) 995 I-H applicable sensitizing material (positive) 〃 〃 Emulsion mixed 〃 I-J desalting 〃 II- Item A The silver halide emulsion used in the present invention may be one which has been physically ripened, chemically ripened and spectrally sensitized. Additives used in such processes are
Disclosure No. 17643, no. 18716
And No. 308119 (Respectively RD1764
3, RD18716 and RD308119).

The places described below are shown.

[0043]

[Table 1]

Known photographic additives that can be used in the present invention are also described in the above-mentioned Research Disclosure. Below are the relevant locations.

[0045]

[Table 2]

Various couplers may be used in the present invention, specific examples of which are described in Research Disclosure above. The relevant locations are shown below.

[0047]

[Table 3]

The additive used in the present invention is RD3081.
It can be added by the dispersion method described in 19XIV.

In the present invention, the aforementioned RD17643 is used.
28 pages, RD18716 pages 647-8 and RD308
The supports described in XIX of 119 can be used.

The magnetic recording medium of the present invention is the above-mentioned RD308.
An auxiliary layer such as a filter layer or an intermediate layer described in the paragraph 119VII-K can be provided.

The photographic constitutional layer of the present invention is the above-mentioned RD3081.
Various layer configurations such as the forward layer, the reverse layer, and the unit configuration described in Item 19VII-K can be adopted.

The present invention can be applied to various color light-sensitive materials represented by color negative films for general use or movies, color reversal films for slides or televisions, color papers, color positive films, and color reversal papers. .

[0053]

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

Example 1 Preparation of magnetic recording medium << Preparation of support >> 100 parts by weight of dimethyl 2,6-naphthalenedicarboxylate and 60 parts by weight of ethylene glycol were mixed with 0.1 part by weight of calcium acetate hydrate as an ester exchange catalyst. After the addition, a transesterification reaction was carried out according to a conventional method.
To the obtained product, 0.05 parts by weight of antimony trioxide,
0.03 parts by weight of trimethyl phosphate was added.
Then gradually raise the temperature and reduce the pressure to 290 ° C, 0.05 mm
Polymerization was performed under the conditions of Hg to obtain polyethylene-2,6-naphthalate having an intrinsic viscosity of 0.60.

After vacuum-drying this at 150 ° C. for 8 hours, it is melt-extruded in layers from a T die at 300 ° C., adhered onto a cooling drum at 50 ° C. while electrostatically applied, and cooled and solidified to give an unstretched sheet. 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 by a tenter type transverse stretching machine at 50% of the total transverse stretching ratio at the first stretching zone of 145 ° C., and further at the second stretching zone of 155 ° C. of the total transverse stretching ratio of 3. It was stretched so as to be three times. Then 10
Heat treated at 0 ° C for 2 seconds, and further heat-fixed zone 200 ° C
For 5 seconds and a second heat setting zone at 240 ° C. for 15 seconds. Next, the film was gradually cooled to room temperature over 30 seconds while performing a 5% relaxation treatment in the lateral direction to obtain a polyethylene naphthalate film having a thickness of 85 μm.

Wrap this around a stainless steel core, and
A heat treatment (annealing treatment) was performed at 10 ° C. for 48 hours to form a support.

12 W / m ² / min on both sides of this support
Of the undercoating coating solution B-1
To a dry film thickness of 0.4 μm and then apply 1
A 2 W / m ² / min corona discharge treatment was applied, and the undercoat coating solution B-2 was applied so as to have a dry film thickness of 0.06 μm.

On the other surface subjected to the corona discharge treatment of 12 W / m ² / min, the undercoating coating solution B-3 was dried to a film thickness of 0.
2 μm, and 12 W / m ² / m
An in-corona discharge treatment was performed, and a coating solution B-4 was applied so as to have a dry film thickness of 0.2 μm.

After coating each layer, each layer was dried at 90 ° C. for 10 seconds, after coating four layers, heat-treated at 110 ° C. for 2 minutes and then cooled at 50 ° C. for 30 seconds.

<Undercoating Coating Liquid B-1> Copolymer latex liquid of butyl acrylate 30% by weight, t-butyl acrylate 20% by weight, styrene 25% by weight and 2-hydroxyethyl acrylate 25% by weight (solid content 30% ) 125 g Compound (UL-1) 0.4 g Hexamethylene-1,6-bis (ethylene urea) 0.05 g Finish with water 1000 ml <Undercoating coating solution B-2> Hydroxylation of styrene-maleic anhydride copolymer Aqueous sodium solution (solid content 6%) 50 g Compound (UL-1) 0.6 g Compound (UL-2) 0.09 g Silica particles (average particle size 3 μ) 0.2 g Finish with water 1000 ml <Coating liquid B-3> Butyl Acrylate 30% by weight, t-butyl acrylate 20% by weight, styrene 25% by weight and 2-hydroxy acrylate 25 % By weight of copolymer latex liquid (solid content 30%) 50 g Compound (UL-1) 0.3 g Hexamethylene-1,6-bis (ethylene urea) 1.1 g Finish with water 1000 ml

[0062]

Embedded image

<Coating Liquid B-4> 60 mol% of dimethyl terephthalate as dicarboxylic acid component, 30 mol% of dimethyl isophthalate, 10 mol% of sodium salt of dimethyl 5-sulfoisophthalate, 50 mol% of ethylene glycol as glycol component, 50 mol% of diethylene glycol was copolymerized by a conventional method. The copolymer was stirred in hot water at 95 ° C. for 3 hours to obtain a 15% by weight aqueous dispersion A.

Aqueous dispersion of tin oxide-antimony oxide composite fine particles (average particle size 0.2 μ) (solid content 40% by weight) 109 g Aqueous dispersion A 67 g Finish with water 1000 ml << Coating of magnetic recording layer >> Undercoat layer U- of the treated support
On the layer coated with the coating liquid, the coating liquid for the magnetic recording layer having the following composition was dried at a dry film thickness of 0.1 using a precision extrusion coater.
The coating was applied so as to have a thickness of 8 μm, and at the same time as drying, the magnetic substance was oriented in the application direction in an orientation magnetic field while the coating film was not dried, thereby achieving high output during magnetic recording and reproduction.

[Composition and Preparation of Magnetic Recording Layer Coating Solution M-1] Cobalt-containing gamma iron oxide (average major axis length 0.12 μm, minor axis length 0.015 μm, Fe ²⁺ / Fe ³⁺ = 0.2, Specific surface area 40 m ² / g, Hc = 750 Oe) 10 parts by weight Alumina (α-Al ₂ O ₃ , average particle size 0.2 μm) 3 parts by weight Diacetyl cellulose (manufactured by Teijin Limited) 150 parts by weight Polyurethane (N3132, Japan) Polyurethane Co., Ltd.) 15 parts by weight Stearic acid 2 parts by weight Cyclohexanone 920 parts by weight Acetone 920 parts by weight After thoroughly mixing and dispersing the above, a polyisocyanate Coronate-3041 (manufactured by Nippon Polyurethane Co., Ltd.) After 50 parts by weight of solid content 50%) was added, the mixture was sufficiently stirred and mixed to obtain a magnetic coating material M-1.

<< Coating of Lubricating Layer >> A lubricant coating solution (wax solution below) dispersed in a water / methanol mixed solution so as to contain 0.1% of carnauba wax on the magnetic recording layer was prepared. The coating amount was 15 mg / m ² . The raw material after the wax application was passed through a heat treatment zone at 100 ° C. for 5 minutes to dry, and then left in an oven at 40 ° C. for 5 days to sufficiently perform a crosslinking reaction of isocyanate.

(Preparation of Wax Liquid) Polyoxyethylene lauryl ether 4 was added to 100 parts by weight of water heated to 90 ° C.
After mixing with 40 parts by weight of carnauba wax separately melted at 90 ° C., the mixture was sufficiently stirred using a high-speed stirring homogenizer to prepare a carnauba wax dispersion (WAX1). .

Next, 995 parts by weight of water, 900 parts by weight of methanol and 10 parts of propylene glycol monomethyl ether.
0 parts by weight, and 5 parts by weight of WAX1 was added thereto.
The mixture was stirred to prepare a wax liquid.

After providing an undercoat layer on the side opposite to the magnetic recording layer side of the above magnetic recording medium, the undercoat coating solutions B-1 and B-2 were applied under the same conditions, the following composition was obtained. A magnetic recording medium 100 was prepared by providing a photographic constituent layer. 1 m ²
Expressed in grams per unit. However, silver halide and colloidal silver are converted to the amount of silver, and the increasing dye (indicated by SD) is silver 1.
It was shown in moles per mole.

First Layer (Antihalation Layer) Black Colloidal Silver 0.16 UV-1 0.3 CM-1 0.044 OIL-1 0.044 Gelatin 1.33 Second Layer (Intermediate Layer) AS-10 .16 OIL-1 0.20 Gelatin 1.40 Third layer (low-sensitivity red color-sensitive layer) Silver iodobromide a 0.12 Silver iodobromide b 0.50 SD-1 3.0 × 10 ^-5 SD-4 1.5 × 10 ^-4 SD-3 3.0 × 10 ^-4 SD-6 3.0 × 10 ^-6 C-1 0.51 CC-1 0.047 OIL-2 0.45 AS- 2 0.005 Gelatin 1.40 4th layer (medium sensitivity red color-sensitive layer) Silver iodobromide c 0.64 SD-1 3.0 × 10 ⁻⁵ SD-2 1.5 × 10 ⁻⁴ SD− ^{3 3.0 × 10 -4 C-2} 0.22 CC-1 0.028 DI-1 0.002 OIL-2 0.21 AS-3 0.006 Zera Down 0.87 Fifth Layer (high sensitivity red-sensitive layer) Silver iodobromide c 0.13 Silver iodobromide d 1.14 SD-1 3.0 × 10 -5 SD-2 1.5 × 10 ^-4 SD-3 3.0 × 10 ^-4 C-2 0.085 C-3 0.084 CC-1 0.029 DI-1 0.027 OIL-2 0.23 AS-3 0.013 Gelatin 1 .23 6th layer (intermediate layer) OIL-1 0.29 AS-1 0.23 gelatin 1.00 7th layer (low-sensitivity green color-sensitive layer) Silver iodobromide a 0.245 Silver iodobromide b 0.105 SD-6 5.0 × 10 ^-4 SD-5 5.0 × 10 ^-4 M-1 0.21 CM-2 0.039 OIL-1 0.25 AS-2 0.003 AS-4 0.063 gelatin 0.98 8th layer (intermediate layer) M-1 0.03 CM-2 0.005 OIL-1 0.16 AS-1 0.11 gelatin 0.80 9th layer (medium speed green color-sensitive layer) Silver iodobromide e 0.87 SD-7 3.0 × 10 ^-4 SD-8 6.0 × 10 ^-5 SD-9 4.0 × 10 ^-5 M-1 0.17 CM-2 0.048 CM-3 0.059 DI-2 0.012 OIL-1 0.29 AS-4 0.05 AS-2 0.005 Gelatin 1.43 10 layers (high sensitivity green color-sensitive layer) Silver iodobromide f 1.19 SD-7 4.0 × 10 ^-4 SD-8 8.0 × 10 ^-5 SD-9 5.0 × 10 ^-5 M -1 0.09 CM-3 0.020 DI-3 0.005 OIL-1 0.11 AS-4 0.026 AS-5 0.014 AS-6 0.006 Gelatin 0.78 11th layer (yellow Filter layer) Yellow colloidal silver 0.05 OIL-1 0.18 AS-7 0.16 Gelatin 1.00 12th layer (low sensitivity blue color Silver iodobromide g 0.29 Silver iodobromide h 0.19 SD-10 8.0 × 10 ^-4 SD-11 3.1 × 10 ^-4 Y-1 0.91 DI-40 022 OIL-1 0.37 AS-2 0.002 Gelatin 1.29 13th layer (high-sensitivity blue-sensitive layer) Silver iodobromide h 0.13 Silver iodobromide i 1.00 SD-10 4. 4 × 10 ^-4 SD-11 1.5 × 10 ^-4 Y-1 0.48 DI-4 0.019 OIL-1 0.21 AS-2 0.004 Gelatin 1.55 14th layer (first protection) Layer) Silver iodobromide j 0.30 UV-1 0.055 UV-2 0.110 OIL-2 0.63 Gelatin 1.32 15th layer (second protective layer) PM-1 0.15 PM-2 0.04 WAX-1 0.02 D-1 0.001 Gelatin 0.55 In addition to the above composition, coating aids SU-1 and S -
2, SU-3, dispersing aid SU-4, viscosity modifier V-1,
Stabilizers ST-1, ST-2, antifoggant AF-1, weight average molecular weight: 10,000 and weight average molecular weight: 1,
100,000 two types of polyvinylpyrrolidone (AF-
2), inhibitors AF-3, AF-4, AF-5, hardener H
-1, H-2 and the preservative Ase-1 were added.

The structure of the compound used in the above sample is shown below.

Table 4 shows the characteristics of the silver iodobromide.

[0073]

[Table 4]

[0074]

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[0075]

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[0076]

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[0077]

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[0078]

[Chemical 6]

[0079]

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[0080]

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[0081]

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[0082]

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As a preferred example of the formation of silver halide grains of the present invention, a production example of silver iodobromide d and f is shown below.

Preparation of seed crystal emulsion-1 A seed crystal emulsion was prepared as follows.

Japanese Patent Publication Nos. 58-58288 and 58-58
No. 289, a silver nitrate aqueous solution (1.161 mol) was added to the following solution A1 adjusted to 35 ° C.
And a mixed aqueous solution of potassium bromide and potassium iodide (2 mol% of potassium iodide) at the same time while maintaining the silver potential (measured with a silver ion selective electrode using a saturated silver-silver chloride electrode as a reference electrode) at 0 mV. Was added over 2 minutes to form nuclei. Subsequently, the liquid temperature was raised to 60 ° C. over 60 minutes, the pH was adjusted to 5.0 with an aqueous sodium carbonate solution, and then an aqueous silver nitrate solution (5.902 mol), potassium bromide and iodide were added. A mixed aqueous solution of potassium (2 mol% potassium iodide) was added over 42 minutes by the simultaneous mixing method while maintaining the silver potential at 9 mV. After the addition was completed, the temperature was lowered to 40 ° C., and desalting and washing with water were immediately performed using a usual flocculation method.

The obtained seed crystal emulsion had an average sphere-converted diameter of 0.24 μm, an average aspect ratio of 4.8, and 90% or more of the total projected area of silver halide grains had a maximum side ratio of 1.0.
The emulsion consisted of hexagonal tabular grains of .about.2.0.
This emulsion is called seed crystal emulsion-1.

[Solution A1] Ocein gelatin 24.2 g Potassium bromide 10.8 g HO (CH ₂ CH ₂ O) _m (CH (CH ₃ ) CH ₂ O) _19.8 (CH ₂ CH ₂ O) _n H (m + n = 9.77) (10% ethanol solution) 6.78 ml 10% nitric acid 114 ml H ₂ O 9657 ml Preparation of silver iodide fine grain emulsion SMC-1 6.0% by weight aqueous gelatin solution containing 0.06 mol of potassium iodide. While vigorously stirring 5 liters, 7.06
2 liters of an aqueous silver nitrate solution and 2 liters of a 7.06 mol aqueous potassium iodide solution were added over 10 minutes. During this time, the pH was controlled at 2.0 using nitric acid, and the temperature was controlled at 40 ° C. After the particles are prepared, the pH is adjusted using an aqueous sodium carbonate solution.
Was adjusted to 5.0. The average particle size of the obtained silver iodide fine particles was 0.05 μm. This emulsion is called SMC-1.

Preparation of silver iodobromide d Seed crystal emulsion-1 corresponding to 0.178 mol and HO (CH ₂ CH ₂
O) _m (CH (CH ₃ ) CH ₂ O) _19.8 (CH ₂ CH ₂ O) _n
H (m + n = 9.77) in 10% ethanol solution 0.5
4.5 wt% inert gelatin aqueous solution containing 70 ml
Keep 0 ml at 75 ° C, pAg 8.4, pH 5.0
Then, particles were formed by the simultaneous mixing method with vigorous stirring by the following procedure.

1) 2.1 mol of silver nitrate aqueous solution and 0.19
5 mol of SMC-1 and an aqueous solution of potassium bromide were added to pA
g while maintaining the pH at 8.4 and the pH at 5.0.

2) Subsequently, the solution was cooled to 60 ° C., and pAg
Was adjusted to 9.8. Then, 0.071 mol of SMC
-1 was added and aging was performed for 2 minutes. (Introduction of dislocation lines) 3) 0.959 mol of silver nitrate aqueous solution and 0.03 mol of S
MC-1 and an aqueous solution of potassium bromide, pAg of 9.
8. Add while keeping pH at 5.0.

During the grain formation, each solution was added at an optimum rate so as to prevent the formation of new nuclei and the Ostwald ripening between grains. After completion of the addition, the resultant was subjected to a water washing treatment at 40 ° C. using a normal flocculation method, and then gelatin was added and redispersed to adjust the pAg to 8.1 and the pH to 5.8.

The obtained emulsion had a grain size (cubic 1 having the same volume).
The emulsion was composed of tabular grains having a halogen composition of 0.75 μm in side length, an average aspect ratio of 5.0, and a halogen composition of 2 / 8.5 / X / 3 mol% (X is a dislocation line introduction position) from the inside of the grains. . When this emulsion was observed with an electron microscope, five or more dislocation lines were observed both in the fringe portion and in the inside of the grain in 60% or more of the total projected area of the grain in the emulsion. The surface silver iodide content was 6.7 mol%.

Preparation of silver iodobromide f In the preparation of silver iodobromide d, pAg was adjusted to 8.
The silver iodobromide f was prepared in exactly the same manner as the silver iodobromide d except that the amount of silver nitrate added in step 3) was 0.92 mol and the amount of SMC-1 was 0.069 mol. .

The obtained emulsion had a grain size (cubic 1 of the same volume).
An emulsion comprising tabular grains having a halogen composition of 0.65 μm, an average aspect ratio of 6.5, and a halogen composition of 2 / 8.5 / X / 7 mol% (X is a dislocation line introduction position) from the inside of the grains. . When this emulsion was observed with an electron microscope, five or more dislocation lines were observed both in the fringe portion and in the inside of the grain in 60% or more of the total projected area of the grain in the emulsion. The surface silver iodide content was 11.9 mol%.

After adding the above-mentioned sensitizing dye to each emulsion and ripening it, triphosphine selenide, sodium thiosulfate, chloroauric acid and potassium thiocyanate were added, and the fog and sensitivity were optimized according to a conventional method. Chemical sensitization was performed so that

Silver iodobromide a, b, c, e, g, h, i, j
Was also subjected to spectral sensitization and chemical sensitization according to d and f above.

The magnetic recording medium 10 thus prepared
0 is cut into 1 inch width and 300 m length, and the test pattern image exposure and magnetic writing head 6
A KHz square wave signal was recorded (model magnetic recording) at a transport speed of 100 mm / s and wound on a reel.

The surfactant N in the following stabilizing solution (A) was changed as shown in Table 5 to prepare further stabilizing solutions (B) to (I), and the imagewise exposure and information were magnetically recorded magnetically. The recording medium 100 was subjected to cine-type development treatment under the condition that only the stabilizing solution was different, and samples 101 to 109 were obtained. Further, a sample 110 was prepared by thoroughly washing with ion-exchanged water instead of the stabilizing solution.

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[Table 5]

(Processing step) Processing step Processing time Processing temperature Replenishment amount * Color development 3 minutes 15 seconds 38 ± 0.3 ° C. 780 ml Bleach 45 seconds 38 ± 2.0 ° C. 150 ml fixation 1 minute 30 seconds 38 ± 2. 0 ° C. 830 ml stable 60 seconds 38 ± 5.0 ° C. 830 ml dry 1 minute 55 ± 5.0 ° C .- * Replenishment amount is a value per 1 m ² of the light-sensitive material.

The following color developing solution, bleaching solution, fixing solution, stabilizing solution and its replenishing solution were used.

Color developing solution and color developing replenisher developing solution replenisher Water 800 ml 800 ml Potassium carbonate 30 g 35 g Sodium hydrogen carbonate 2.5 g 3.0 g Potassium sulfite 3.0 g 5.0 g Sodium bromide 1.3 g 0.4 g Iodide Potassium 1.2 mg-Hydroxylamine sulfate 2.5 g 3.1 g Sodium chloride 0.6 g-4-Amino-3-methyl-N-ethyl-N- (β-hydroxylethyl) aniline sulfate 4.5 g 6.3 g Diethylenetriaminepentaacetic acid 3.0 g 3.0 g Potassium hydroxide 1.2 g 2.0 g Water was added to make 1 liter, and potassium hydroxide or 20% sulfuric acid was used to adjust the color developer to pH 10.06 and the replenisher to pH 10. Adjust to 18.

Bleaching Solution and Bleaching Replenishing Solution Bleaching Solution Replenishing Solution Water 700 ml 700 ml 1,3-Diaminopropanetetraacetic acid iron (III) ammonium 125 g 175 g ethylenediaminetetraacetic acid 2 g 2 g sodium nitrate 40 g 50 g ammonium bromide 150 g 200 g glacial acetic acid 40 g 56 g water To 1 liter, and the pH of the bleaching solution is adjusted to 4 with ammonia water or glacial acetic acid. 4 and the replenisher is adjusted to pH 4.0.

Fixer and fixer replenisher Fixer replenisher Replenisher Water 800 ml 800 ml Ammonium thiocyanate 120 g 150 g Ammonium thiosulfate 150 g 180 g Sodium sulfite 15 g 20 g Ethylenediaminetetraacetic acid 2 g 2 g The fixer is pH 6.2 with aqueous ammonia or glacial acetic acid. Adjust the pH of the replenisher to 6.5 and add water to make 1 liter.

Stabilizer (A) and stable replenisher Water 900 ml Surfactant N (polyethylene glycol monooctyl phenyl ether (n ₁ = 10)) 2.0 g Dimethylol urea 0.5 g Hexamethylene tetramine 0.2 g 1,2 -Benzisothiazolin-3-one 0.1 g Siloxane (UC-L-77) 0.1 g Ammonia water 0.5 ml After adding water to 1 liter, pH was adjusted to 8 with ammonia water or 50% sulfuric acid. Adjust to 5.

With respect to the developed samples 101 to 110, magnetically recorded information was read by a magnetic head at a conveying speed of 100 mm / S, and at the same time, the occurrence of clogging of the magnetic head was evaluated. The running stability was also investigated when the transport speed was 200 mm / S.

<Magnetic head clogging evaluation test> A square wave signal was read by the magnetic reading head at the same transport speed, and the point where the output dropped by 2 dB or more from the initial value was taken as the head clog generation point and the test started. The generation level of head clogs was evaluated by the length (m). It means that the smaller the value is, that is, the lesser the head clog is generated in the shorter distance, the less preferable.

<Running Stability Test> The operation of running for 0.15 seconds at a transport speed of 200 mm / S, then stopping for 0.3 seconds and then running again at 200 mm / S was repeated continuously, and jamming occurred. The situation was evaluated.

Good: No jamming occurred. Defect: Occurred at least once every 10 m.

The results are shown in Table 6.

[0111]

[Table 6]

As is clear from Table 6, the treatment method of the present invention is excellent in that it is less likely to cause clogging and has no problems in magnetic characteristics and transparency.

Further, although the result of washing with water as the final treatment was that clogging was less likely to occur, it was not preferable due to the problem of curling after the treatment.

[0114]

According to the present invention, there is provided a method of treating a magnetic recording medium in which clogging of a magnetic head is prevented without affecting the magnetic characteristics and running properties. Another object of the present invention is to provide a magnetic recording medium that prevents clogging of a magnetic head even if the magnetic recording medium also has a photographic constituent layer of a multi-layer color photosensitive material.

Claims (3)

[Claims] 1. A magnetic recording medium having a magnetic recording layer on one side on a transparent support and at least one photographic constituent layer on the other side, which is subjected to imagewise exposure and magnetic recording and then subjected to development treatment. A method for treating a magnetic recording medium, comprising treating with a treatment liquid containing a compound represented by the following general formula (1) or (2). Formula (1) H (-O-R 1 -) n1 in -O-R ₂ [wherein, R ₁ represents an alkylene group having 2 or 3 carbon atoms, R ₂ is 25 or less of alkyl having 8 or more total carbon Represents a group or an aryl group. n ₁ represents an integer of 12 or more and 30 or less. ] Formula (2) H (-O-R 3 -) in _n2 -O-R ₄ [wherein, R ₃ represents an alkylene group having 2 or 3 carbon atoms, R ₄ is 25 or less carbon atoms in total 16 or more Represents an alkyl group or an aryl group. n ₂ represents an integer of 7 or more and 11 or less. ] 2. The method of processing a magnetic recording medium according to claim 1, wherein the processing solution is the final stabilizing solution in the processing step of the silver halide photosensitive material. 3. A transparent support having a magnetic recording layer on one side, and at least one red-sensitive layer on the other side.
When a magnetic recording medium having a photographic constituent layer consisting of a green-sensitive layer, a blue-sensitive layer and a non-photosensitive layer is subjected to image exposure and magnetic recording and then development processing, it is represented by the general formula (1) or (2). A method of treating a magnetic recording medium, which comprises treating with a treatment liquid containing a compound.