JPH02298945A - Processing device for silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To remove the respective processing liquids sticking to the surface of the silver halide photographic sensitive material by installing at least one of 1 air slit and 2 thin film-like soft resin plates to various outlets of the developing tank, fixing tank and rinsing tank of an automatic developing machine for the silver halide photographic sensitive material. CONSTITUTION:The photosensitive material S is guided via a guide G from the outlet side driving roller R1 of the processing tank of the automatic developing machine for the silver halide photographic sensitive material having the total processing time (dry to dry) within 60 seconds and >=1,500mm/min line speed to a transition roller R2. Dry wind is blown reverse in this guiding direction by a nozzle N to remove the moisture. The guide G is used commonly as the nozzle N and the wind is blown from the tip of the guide G in the direction opposite to the photosensitive material S. The resin plates P are so disposed as to squeeze the photosensitive material S to remove the carried over moisture in the same manner as the case of an air nozzle system.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a processing apparatus for silver halide photographic materials,
More specifically, the present invention relates to an automatic processor suitable for printing and plate-making photosensitive materials.

[Background of the invention]

In recent years, in the printing and plate making industry, there has been an extremely high demand for shortening the processing time of photosensitive materials and improving the working environment such as odor.

Although it is possible to shorten the development processing time to some extent by increasing the processing temperature, several problems arise.

For example, drying C: It is well known that an increase in temperature above a certain level has an adverse effect on the dimensional stability before and after processing, which is an important characteristic of photosensitive materials for printing plate making. Increasing the drying air volume is also effective in shortening drying time, but
Other problems arise, such as an increase in electric power for blowing air and an increase in noise.

[Purpose of the invention]

In order to solve the above problems, an object of the present invention is to provide an ultra-rapid processing method that takes into consideration the performance of photosensitive materials, working environment, cost, etc.

[Structure of the invention]

The above object of the present invention is to reduce the total processing time (dry to dr.
y) is within 60 seconds and the line speed is 150
In an automatic processor for silver halide photographic light-sensitive materials with a haze level of 0 or more, each processing solution adhering to the surface of the light-sensitive material is removed at the outlet of each of the developing tank, fixing tank, and washing tank. This is achieved by a method for processing silver halide photographic materials, which is characterized by using an automatic developing machine equipped with at least one of the following: (1) air slits (2) and (2) thin film-like soft resin plates.

The present invention will be explained in more detail below.

The air slit nozzle used in the present invention preferably has a slit width of 1 Cff1 or less, a distance from the surface of the photosensitive material to the nozzle of 1 Cff1 or less, and an average wind speed of 2 m/sec or more. Further, it is preferable that the drying air be applied in a direction opposite to the direction in which the photosensitive material is transported in order to remove the processing liquid on the surface of the photosensitive material. In addition, it is preferable to install nozzles on both sides to maintain balance in consideration of the transportability of the photosensitive material, and to install the nozzles near the exit roller.

Corrosion-resistant materials such as hard vinyl chloride resin and stainless steel are suitable for the nozzle.

In addition, when using a thin film-like soft resin plate, it is desirable that it be in contact with the surface of the photosensitive material at an angle of 90" or less, preferably 45° or less. Materials for the resin include polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, Cellulose triacetate, Teflon, isobutyne rubber, butadiene rubber, etc. are used, but are not limited to these.

In order to shorten processing time, and particularly to reduce moisture brought into the drying device, it is effective to install the nozzle or resin plate of the present invention on the outlet side of the washing tank. In order to shorten the processing time, it is easiest and most effective to speed up the drying process. Shortening the time for development, fixing, etc. has a large impact on performance. For example, problems such as fogging, color retention, and residual color are likely to occur. On the other hand, since the purpose of the drying process is to remove moisture, it is extremely effective to prevent excess moisture from being introduced.

Both the nozzle and the resin plate of the present invention are provided at the transition portion on the outlet side of each processing tank.

FIG. 1 is an explanatory diagram of the air nozzle method according to the present invention. In the same figure (a), the photosensitive material S is transferred from the exit side drive roll R8 of the processing tank to the roll R.

In this method, the water is guided through a guide G, but drying air is blown from a nozzle N in the opposite direction of the guide to remove the moisture brought in. Further, in FIG. 2B, this guide G is also used as a nozzle N, and air is blown in the opposite direction to the photosensitive material S from the tip of the guide.

FIG. 2 is an explanatory diagram when a resin plate P is used, and is an example in which the resin plate P is placed on a guide G similar to that in FIG. 1 so as to squeeze the photosensitive material S. ) shows the case of one pair, and the same figure (d) shows an example in which a plurality of resin plates are installed.

〔Example〕

Hereinafter, the effects of the present invention will be illustrated by examples.

Example 1 A water removal device of the present invention shown in FIGS. 1 and 2 was attached to a 28-inch wide automatic developing machine for printing photosensitive materials at the exit side of the washing tank, and the following photosensitive materials for printing were processed. The complete size (508cm x 8610cm) was processed.

The processing is done using the following developer and fixer.
y for 45 seconds to 60 seconds, line speed 1000 to 250
Evaluate within the range of 0au+/sin. The environmental conditions at that time were set to a room temperature of 30' and humidity of 80%, and the weight of the photographic material in the wet state after processing the entire size was measured, and the weight after drying was also measured. This carryover (
wet-dry) amount was measured. The results are shown in Table 1.

For comparison, the moisture removal device of the present invention was used. In the above table, 5.5/
5. G Daizen or above in 53 seconds. l〃 In the 45 second system, 4,7// caused poor drying.

Table 1 shows that the amount of carryover can be significantly reduced when the method of the present invention is applied.

Prescription of photosensitive material The photosensitive material has a thickness of 100 μm with latex undercoating.
on a support of polyethylene terephthalate with an amount of silver of 4.
Gelatin 3.0 g/l12 (including a protective layer with a gelatin amount of 1.0 g/aF) so as to have a gelatin content of 1.0 g/m2, a known dye as a backing layer on the opposite side of the support, and gelatin 1.0 g/l12 as a protective layer. A well-known hardening agent was added to each side of the film so that the gelatin amount was 3.0 g/m'' including a layer of 0 g/+'', and the coating was dried. The emulsion layer contains the following compounds (a) and (b), and the protective layers on the emulsion surface and the backing surface each contain a matting agent of amorphous silica.

(a) (b) Developer formulation (composition A) Pure water (ion-exchanged water) 150 mQ ethylenediaminetetraacetic acid disodium salt g Diethylene glycol 50 g Potassium sulfite (55% w/v aqueous solution) 100 m12 Potassium carbonate 509 Hydroquinone
1595-Methylbenzotriazole 200mg 1-phenyl-5-mercaptotetrazole 30 shoulders 9 Potassium hydroxide Amount to adjust the pH of the working solution to 10.4 Potassium bromide 4.5g (composition) Pure water (ion exchange water) 3taa diethylene glycol 505F Ethylenediaminetetraacetic acid disodium salt Acetic acid (90% aqueous solution)
0.3m45-nitroindazole
110+nl-phenyl-3-pyrazolidone
When using a 500mp developer, the above compositions were dissolved in 500ml of water in the order of composition and finished to 1Q before use.

Fixer formulation (composition A) Ammonium thiosulfate (72.5% V/V aqueous solution) 22
3m+2 Sodium sulfite 9.59 Sodium acetate trihydrate 34.39 Boric acid
6.7.

Sodium citrate dihydrate 2. o9 acetic acid (
90% w/v aqueous solution) 12.4 mff
i (composition) Pure water (ion-exchanged water) 6 m (1 sulfuric acid (50% w/w aqueous solution) 6.8 g aluminum sulfate Cha, aqueous solution with an Os equivalent content of 8.1% w/w) 20
．． 0 mff When using the fixer, the above composition A1 was dissolved in 500 m of water (2) in the order of composition, finished to 1 Q, and used.

The pH of this fixer was about 4.2.

〔Effect of the invention〕

According to the present invention, it has been possible to provide an ultra-rapid processing method that takes into account the performance, working environment, and cost of silver halide photographic materials.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram when the air nozzle of the present invention is used, and FIG. 2 is an explanatory diagram when a resin plate is used. R8: Processing tank outlet side drive roll R1 two-way roll S: Photosensitive material

Claims (1)

[Claims] The total processing time (drytodry) is within 60 seconds,
In an automatic developing machine for silver halide photographic light-sensitive materials with a line speed of 1500 mm/min or more, each processing solution adhering to the surface of the light-sensitive material is removed at the outlet of each tank of the developing tank, fixing tank, and washing tank. A processing apparatus for silver halide photographic materials, characterized in that an automatic developing machine equipped with at least one of (1) an air slit and (2) a thin film-like soft resin plate is used.