JPH0554933B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for processing silver halide photographic materials, and in particular, the present invention relates to a method for processing a silver halide photographic light-sensitive material, in particular a method for processing a silver halide photographic light-sensitive material, in which at least one halogen is coated on a photographic reflective support made of a whitened plastic film. The present invention relates to a method for processing a silver halide photographic material provided with a silver emulsion layer.

[Prior Art] Recently, at least one silver halide emulsion layer is used as a photographic material on a photographic reflective support made of whitened plastic film because of its high whiteness and sharpness of photographic images. A silver halide photographic light-sensitive material is used.

This photographic material is processed through processes such as printing, developing, cutting, etc. In the printing process, the silver halide emulsion layer of the photographic material is exposed to light using a negative film, and in the subsequent development process, a visible photographic image is formed on the photographic material. Since photographic materials are usually used in rolls, after development, the photographic materials are cut one by one into predetermined sizes. In each of the above-mentioned processing steps, processing devices such as a printer, an automatic processor, and a cutter are used, and in each of these processing devices, the photographic material is conveyed at a relatively high speed by rollers.

The above-mentioned photographic materials have particularly high chargeability, so that charges are accumulated by contact charging with a roller. When the charges accumulated in the photographic material are discharged during, for example, a printing process, fogging occurs due to this discharge. Further, in the developing process, electric discharge is often caused to the human body, especially when winding up after the development is completed. In addition, in the cutting process, in addition to the discharge that occurs to the human body, the photographic materials after being cut are stuck to each other unevenly due to static electricity, making it impossible to align them. A situation may arise where damage occurs.

The above-mentioned photographic material is charged in this way.
Since this adversely affects not only the photographic images formed but also the human body, it is necessary to take measures to prevent the photographic materials from being charged as much as possible.

The reality is that conventionally no means have been taken to prevent such charging.

[Object of the Invention] In view of the above-mentioned conventional drawbacks, the present invention provides an antistatic means on the processing and conveyance path of silver halide photographic light-sensitive materials to eliminate the adverse effects of charging on photographic images and the human body. An object of the present invention is to provide a method for processing silver halide photographic materials.

[Structure of the Invention] According to the present invention, the above object is to provide a silver halide photographic light-sensitive material in which at least one silver halide emulsion layer is provided on a photographic reflective support made of a whitened plastic film. This is achieved by providing a method for processing a silver halide photographic light-sensitive material, in which, in the processing step, a static eliminating means is disposed on the conveyance path of the silver halide photographic light-sensitive material.

The above-mentioned silver halide photographic light-sensitive material uses a whitened plastic film as a photographic reflective support, and is generally referred to as white PET or white PET in the industry. The structure is completely different from conventional resin coated paper (RC paper), which is coated with resin and used as a reflective support for photographs. The present invention is intended to solve the problems peculiar to the above-mentioned silver halide photographic materials. Further, the above silver halide photographic material called White PET or White PET is commercially available.

Regarding the above-mentioned silver halide photographic light-sensitive materials, especially their photographic reflective supports, for example, the British patent
No. 1563591, No. 1563592, JP-A-49-114921,
No. 49-116173, Special Publication No. 55-5104, No. 56-4901
There is a description in the issue etc.

The above-mentioned plastic film is preferably a thermoplastic resin whose main component is polyester resin, and it is not only a thermoplastic resin consisting only of polyester, but also other thermoplastic resins as long as the resin properties of the main component polyester are not practically changed. It also includes those to which polymers, additives, etc. are added.

When using polyester resin as a reflective support for photography, these polyester resins include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid, and naphthalene dicarboxylic acid, ethylene glycol, 1,3-propanediol, 1,
Examples include polymers of condensates with glycols such as 4-butanediol, such as polyethylene terephthalate, polyethylene 2,6-dinaphthalate, polypropylene terephthalate, polybutylene terephthalate, and copolymers thereof. Among these polyester resins, polyethylene terephthalate is preferred. Polyethylene terephthalate resin film is impermeable to water, has excellent smoothness, has excellent mechanical properties such as tensile strength and tear strength, has excellent dimensional stability such as heat shrinkage, and has excellent chemical resistance during development processing. It is something that

The above-mentioned whitening treatment is, for example, adding a white pigment to the plastic film resin. Examples of the white pigment include titanium oxide and barium sulfate, preferably those subjected to surface treatment. Here, the surface treatment applied to titanium oxide etc. refers to surface treatment performed with an aluminum compound having an oxygen bond or a hydroxyl group bond, such as alumina, and/or a silicon compound such as silicic acid, or after the treatment. This is a treatment in which the surface is further treated with metal soap, a surfactant, a coupling agent, etc., to make particles such as titanium oxide compatible with the plastic film resin.

As the titanium oxide, titanium oxide (2) having a rutile type and/or anatase type structure is preferably used. Refractive index of titanium oxide (n=2.5
~2.75) is the refractive index of the plastic film resin (for example, the refractive index of polyethylene terephthalate).
1.66), so when used in a support for a photographic material, it has excellent light reflection ability and the resulting photographic image has excellent resolution.

The proportion of the white pigment is preferably 10 to 50 parts by weight, more preferably 15 to 30 parts by weight, based on 100 parts by weight of the resin from the viewpoint of the whiteness and stretchability of the support film.

Examples of the white pigment that can be used in combination with the titanium oxide include one or more inorganic pigments such as barium sulfate, silica, talc, and calcium carbonate.

In order to mold and process the above-mentioned reflective support for photography, the support resin to which the above-mentioned white pigment has been added is melted, extruded from a slit die, grounded on the rapidly cooling surface of a rotating drum, etc. to form an amorphous sheet, and then supported. Stretching is carried out sequentially or biaxially in a longitudinal or transverse direction within a temperature range of at least the glass transition temperature (Tg) of the body resin and at most 130°C. At this time, in order to satisfy the mechanical strength and dimensional stability of the film support, it is preferable that the stretching be carried out in an area ratio of 4 to 16 times. After stretching, it is preferable to carry out heat setting and heat relaxation.

The thickness of the support is generally 50 to 300 μm, preferably 75 to 250 μm.

In addition, the patent application filed in 1983 by the present inventors
As described in No. 241529, in a thermoplastic resin whose main component is a polyester resin, there are fine particles that have a weak adhesive force with the thermoplastic resin and are inert to the thermoplastic resin, and fine particles that are inactive with the thermoplastic resin. A resin composition containing a white pigment with strong adhesive strength is melted and rapidly cooled to form an amorphous sheet, and then voids are formed around the fine particles, and voids are substantially formed around the white pigment. A whitened plastic film can be formed by biaxially stretching the plastic film so as not to cause the plastic film to become white.

At least one silver halide emulsion layer is coated onto a photographic reflective support consisting of an opaque, whitened plastic film shaped as described above. In this case, if necessary, a surface activation treatment such as corona discharge and/or a subbing layer can be applied prior to coating the photosensitive photographic emulsion layer.

As the silver halide emulsion layer, for example, silver chloride, silver bromide, silver chlorobromide, silver iodobromide, silver chloroiodobromide emulsion, etc. can be preferably used. Additionally, this layer can contain a coupler for creating a color image, and it is also possible to contain a hydrophilic polymeric substance other than gelatin as a binder, such as polyvinyl alcohol, polyvinylpyrrolidone, etc. It is. Furthermore, the silver halide emulsion layer can be sensitized in the photosensitive wavelength range with cyanine dyes, merocyanine dyes, etc., and may also contain various other photographic additives, such as antifoggants,
A chemical sensitizer using gold, sulfur, etc., a hardening agent, etc. can be preferably added.

Further, the steps for processing the silver halide photographic material having the above structure include a printing step in which the silver halide photographic material is exposed to light from a film, and a development of the silver halide photographic material after the printing step is completed. a developing step to be carried out, an image quality check step of checking the image quality of the photographic image formed on the above-mentioned silver halide photographic light-sensitive material after the completion of the development step, and a cutting of the above-mentioned silver halide photographic light-sensitive material on which the photographic image has been formed into a predetermined size. The above-mentioned development process includes post-development bleaching, fixing, washing, and/or stabilization treatment, drying, etc., and also includes not only black and white development but also color development. .

The present invention is applicable to any of the above processing steps.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

First, a case will be described in which a static eliminating means is provided in the printing process. FIG. 1 is a front view of a printer used in the printing process, and FIG. 2 is a partially enlarged sectional view of FIG. 1.

The printer 1 is composed of magazines 2 and 3, a cabinet 4, an electrical equipment main body 5, a lens deck 6, an electromagnetic pressure carrier 7, a lamp house 8, a static eliminator 18, and the like.

A photosensitive material 9 is loaded in the magazine 2 in the form of a roll. The photosensitive material 9 is a silver halide photographic light-sensitive material in which at least one silver halide emulsion layer is provided on a photographic reflective support made of a whitened plastic film. Sensitive material 9
The detailed configuration is as described above.

The photosensitive material 9 in the magazine 2 passes through the cabinet 4 along a path from A to B, as shown in FIG. 2, and is wound up into the magazine 3. That is, the photosensitive material 9 enters the cabinet 4 from A, is conveyed by a feed roller 10 and a pressure roller 11, passes through a swing arm roller 12, and is sent by a feed roller 13 to an exposure position. At the exposure position, the photosensitive material 9 is pressed against a holder (not shown) by a press plate 14. The film 20 set on the electromagnetic pressure carrier 7 is irradiated by the lamp 19 in the lamp house 8.
The light image is captured by the lens 2 fixed on the lens deck 6.
The photosensitive surface of the photosensitive material 9 is exposed to light through the photosensitive material 1 . After exposure, the photosensitive material 9 is sent by a pressure roller 15, passed through a swing arm roller 16, and sent by a feed roller 17, and enters the magazine 3 from the cabinet 4.

In this way, the photosensitive material 9 moves inside the cabinet 4.
The photosensitive material 9 is conveyed along the route B. On this conveyance path, the photosensitive material 9 comes into contact with several stages of rollers, so charges are accumulated in the photosensitive material 9 due to contact charging with the rollers. The charges accumulated on the sensitive material 9 are erased when the sensitive material 9 comes into contact with the static eliminating means 18.
As the static eliminating means 18, for example, as shown in FIG. 3a, a thin conducting wire formed in the shape of a blind or a brush in the longitudinal direction, or a thin conducting wire formed in the shape of a cloth as shown in FIG. Alternatively, as shown in Figure c, thin conductive wires formed into threads or strings can be used, and these can be constructed by connecting these to a grounded point on the main body of the machine. The static eliminating means 18 is not limited to the forms shown in FIGS. 3a, b, and c. What type of static eliminating means 18 can be preferably used depends on the location of the static eliminating means 18 and the amount of charge on the photosensitive material 19. In the printer 1 of this embodiment, the form shown in FIG. 3c is particularly preferable. Further, the material of the static eliminating means 18 is typically a metal such as copper, but is not particularly limited to metal as long as it is conductive. In addition, static eliminating means 18
In this embodiment, as shown in FIG.
Most preferably, it is located near the outlet of the Further, if necessary, they can be placed at other appropriate locations on the conveyance path from A to B.

Next, a case will be described in which a static eliminating means is provided in the developing process.

FIG. 4 is a schematic sectional view of an automatic developing machine used in the developing process, and FIG. 5 is a perspective view of the automatic developing machine as seen from the direction of the drying section.

The automatic developing machine 22 includes a developing section 23, a drying section 24, and a static eliminating means 27, which are composed of a plurality of tanks that continuously perform development, bleaching, fixing, washing, and/or stabilization processing, etc.
Consists of etc. A plurality of conveyance rollers are arranged in each of the developing section 23 and the drying section 24, and one endless belt 2 is inserted between these conveyance rollers.
5 is being bridged.

The photosensitive material 9 that has been exposed in the printing process described above is wound up and stored in the magazine 3. When the magazine 3 containing the photosensitive material 9 is set in an automatic developing machine, the image shown by the arrow in FIG. As shown by C, the undeveloped photosensitive material 9 enters the developing section 23, and the undeveloped photosensitive material 9 enters the developing section 23.
During the process of being conveyed through the storage compartment 3, development, bleaching, fixing, washing, and/or stabilization treatments are sequentially performed. After passing through the developing section 23, the photosensitive material 9 subsequently enters a drying section 24, where it is dried. After drying, the photosensitive material 9 is discharged from the machine as shown by arrow D in FIG. 4, and is wound into the winding magazine 26. In this way, the photosensitive material 9 passes through the automatic developing machine 22 along the conveyance path from C to D, but the photosensitive material 9 is easily charged by the conveyance rollers that come into contact with it, especially in the drying section 24. Here, the charges accumulated on the photosensitive material 9 are erased by the photosensitive material 9 coming into contact with the charging means 27. It is most preferable that the charging means 27 is disposed on a path that passes through the final roller of the drying section 24 and reaches the winding magazine 26. Further, if necessary, they can be placed in duplicate at other appropriate locations on the conveyance path from C to D. Further, in the automatic developing machine 22 of this embodiment,
The static eliminating means 27 may take any form, but the form shown in FIG. 3a is particularly preferable.

After the above development process is completed, an image quality check is performed. Although not shown, this is carried out while sequentially conveying the photosensitive material 9 after development (that is, the one wound up on the winding magazine 26) on the conveyance roll. Since the charged photosensitive material 9 is charged by contact with the photosensitive material 9, the charged photosensitive material 9 can be neutralized by disposing a static eliminator similar to the above at an appropriate location on the conveyance path of the photosensitive material 9.

Next, the cutting process begins. A case will be described in which a static eliminating means is provided in the cutting process.

Figure 6 is a perspective view showing the overall structure of the cutter used in the cutting process, and Figure 7 is a perspective view of the cutter used in the cutting process.
It is a view seen from the direction of arrow E in the figure.

The cutter 28 is the electrical equipment main body 29, the core guide 3
0, tension roller 31, feed roller 3
2, a side guide 33, an edge detection section 34, a pressure roller section 35, a cutter blade 36, a receiving section 37, a static eliminating means 38, and the like.

After the above-mentioned development process and image quality check process, the photosensitive material 9 has been processed in roll form.
is cut to a predetermined size for each print.
The roll-shaped photosensitive material 9 set on the core guide 30 of the cutter 28 is further conveyed along the side guides 33 via a tension roller 31 and a feed roller 32. The edge of the print is detected by an edge detection section 34. Immediately before the cutter blade 36, the photosensitive material 9 is conveyed while being pressed by the pressure roller section 35, and then cut by the cutter blade 36 for each print. After this cut photosensitive material 9 comes into contact with the static eliminating means 38, it
Fall inwards.

Although the photosensitive material 9 is conveyed along the above-described conveyance path, the charges accumulated in the photosensitive material 9 due to contact with rollers or the like are erased when the photosensitive material 9 comes into contact with the static eliminating means 38 . The static eliminating means 38 is the cutter blade 3
Although it is most preferable to arrange it immediately after the cutter blade 36 and the pressure roller part 35, it is also possible to arrange it between the cutter blade 36 and the pressure roller part 35. Further, if necessary, they can be placed overlappingly at other appropriate locations on the conveyance path. Further, in the cutter 28 of this embodiment, the static eliminating means 38 may have any form, but the form shown in FIG. 3c is particularly preferable.

[Effects of the Invention] As explained in detail above, according to the present invention, the static eliminating means is disposed on the processing and conveying path of the silver halide photographic light-sensitive material, thereby eliminating the adverse effects on photographic images and the human body caused by static charging. You can.

[Brief explanation of the drawing]

FIG. 1 is a front view of the printer, FIG. 2 is a partial enlarged sectional view of FIG. 1, FIG.
Fig. 5 is a perspective view of the automatic developing machine as seen from the direction of the drying section, Fig. 6 is a perspective view showing the overall structure of the cutter,
FIG. 7 is a view in the direction of arrow E in FIG. 6. 1...Printer, 2, 3...Magazine, 4...
...Cabinet, 9...Sensitive material, 10, 13, 17
...Feed roller, 11, 15...Pressure roller, 1
2, 16... Swing arm roller, 14... Push plate, 18, 27, 38... Static elimination means, 19... Lamp, 20... Negative film, 21... Lens,
22... automatic developing machine, 23... developing section, 24...
Drying section, 28... cutter, 30... core guide, 31... tension roller, 32... feed roller, 35... pressure roller section, 36... cutter blade.

Claims (1)

[Claims] 1. At least one silver halide emulsion layer is provided on a photographic reflective support made of whitened plastic film, and a silver halide photographic light-sensitive material for printing, which is wound into a roll, is sequentially conveyed. In the step of processing the silver halide photographic light-sensitive material for printing while the silver halide photosensitive material is wound in a roll, a static eliminating means is disposed on a conveyance path along which the silver halide photographic light-sensitive material for printing is conveyed after being sequentially sent out from a rolled state. Processing method for silver chemical photographic materials.