JPH0728205A - Tablet-shaped processing agent for processing silver halide color photographic sensitive material - Google Patents

Abstract

PURPOSE:To provide tablets for bleach fixing excellent in preservability over a long period of time and easy to handle. CONSTITUTION:This tablet-shaped processing agent contains at least one kind of compd. selected among polyethylene glycols, polyvinylpyrrolidones and polyvinyl alcohols and at least one of a thiosulfate and a ferrous complex salt of aminopolycarboxylic acid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tablet for processing a silver halide color photographic light-sensitive material, more specifically, a process used for processing a silver halide color photographic light-sensitive material having excellent storage stability and sufficient strength. The present invention relates to a tablet processing agent for preparing a liquid.

[0002]

2. Description of the Related Art Silver halide photographic light-sensitive materials are
Processing is performed by steps such as development, desilvering, washing, and stabilization, and is usually performed using an automatic developing machine (hereinafter referred to as an automatic processor). In that case, the replenisher replenishment method is generally widely used and is controlled so as to keep the activity of the processing solution in the processing tank constant. The purpose is to dilute the eluate from
To replenish the liquid, a large amount of overflow liquid or empty plastic bottle is usually discharged.

In recent years, environmental problems related to photographic processing have been increasing worldwide, such as the movement of regulations on the dumping of photographic waste liquids into the ocean and the regulations on the disposal of plastic materials. For this reason, safety regulations for packaging materials have been tightened, leading to higher costs, so there is a need for the development of a new processing system that greatly reduces photographic waste liquid and does not use a processing agent bottle.

On the other hand, in a store which uses a small automatic developing machine, which is increasing rapidly in recent years, a so-called minilab store, the development of print exposure control technology is progressing, and a system allowing anyone to print is being introduced. However, it is still difficult to dissolve the replenisher and to manage the treatment solution, and it is easy to make a serious mistake of dissolving and replenishing the treatment agent by mistake. It's coming.

Therefore, in the photographic industry, there is a strong demand for the development of a solid chemical replenishment system that produces almost no photographic processing waste liquid, does not use a processing agent bottle, and does not require any dissolving operation. As a method for responding to this demand, Japanese Patent Laid-Open No. 5-119454 discloses a treatment method in which almost all treatment agent components are solidified into a tablet form and directly replenished in a treatment tank.

However, among the tablet-type treatment agents described in the above publications, particularly tablets for bleach-fixing treatment using aminopolycarboxylic acid ferric iron complex salt and thiosulfate salt absorb moisture of thiosulfate salt in a high humidity environment. Causes the surface of the tablet to become sticky. Even if moisture-proof packaging is applied, the above-mentioned phenomenon occurs during long-term storage due to humidity inside the package and moisture inside the tablets. As a result, there arises a problem that the tablets agglomerate with each other or adhere to the inner wall of the packaging material, which causes a problem that the tablet cannot be ejected or taken out from the packaging material or the cartridge when used by the user. Especially, when a ship is used to transport from Japan to areas such as Southeast Asia, the Middle East, and Africa for a long period of 2 to 4 weeks, the temperature difference between day and night is 15 to 20 ° C, and the humidity is also high. The above problem becomes more prominent with a change of about 20 to 30% RH.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bleach-fixing treatment tablet which has excellent long-term storability and is easy to use.

[0008]

The above object can be achieved by the following means. That is, (1) at least one compound selected from polyethylene glycols, polyvinylpyrrolidones and polyvinyl alcohols, and thiosulfate,
A tablet-like processing agent for processing a silver halide color photographic light-sensitive material, which comprises at least one ferric aminopolycarboxylic acid II complex. (2) Polyethylene glycols, polyvinylpyrrolidones, polyvinyl alcohols The tablet processing agent for silver halide color photographic light-sensitive material processing according to item (1), characterized in that at least one selected compound is contained in the tablet processing agent in an amount of 10 to 50 wt%. The above-mentioned tablet is obtained by mixing a granule containing at least an aminopolycarboxylic acid ferric iron complex salt and a granule containing a thiosulfate, followed by compression molding (1) Or (4) a tablet processing agent for silver halide color photographic light-sensitive material processing, (4) the length x in the longitudinal direction of the tablet processing agent
(Mm) to thickness h (mm) ratio: x / h is 1.0 to 6.0, Tablet for processing silver halide color photographic light-sensitive material according to any one of (1) to (3). It is a conditioner.

[0009]

The tablet of the present invention comprises polyethylene glycols along with thiosulfate and aminopolycarboxylic acid ferric iron complex salt,
It is characterized by containing at least one selected from polyvinylpyrrolidones and polyvinyl alcohols.
As a result of diligent studies, the present inventor has suppressed the stickiness of the tablet surface under long-term storage by containing the compound in a tablet, and can effectively prevent adhesion between tablets or between a tablet and a packaging material. I found it. The polyethylene glycols of the present invention preferably have an average molecular weight of 600 to 20,000, more preferably 1,000 to 20,000, and even more preferably 3,000 to 20,000. The polyvinyl alcohols of the present invention preferably have a weight average molecular weight of 2,000 to 200,000, more preferably 3,000 to 100,000.
The polyvinylpyrrolidones of the present invention have a viscosity average molecular weight of 10,0.
Those of 00 to 700,000 are preferable.

Among the polymer compounds of the present invention, polyethylene glycols exhibit the effects of the present invention more favorably. The polymer compound of the present invention contains 10 to 50 wt% in one tablet.
% Is preferable from the viewpoint of the effect of the present invention and the strength of the tablet.

Further, the solid processing composition of the present invention contains at least one compound selected from saccharides, so that not only the strength of the tablet is further enhanced, but also the effect of preventing internal reaction during long-term storage is further improved. It is further enhanced. Among the above sugars, sugar alcohols such as mannitol, sorbitol and erythritol, and dextrins such as maltodextrin and cyclodextrin are preferable.

The solid processing agent of the present invention is a tablet, powder,
Granular treatment agents are not included in the present invention. The tablet of the present invention is obtained by compression-molding powder and / or granules, and contains an aminopolycarboxylic acid ferric iron complex salt from the viewpoint of the effect of the present invention and the strength of the obtained tablet. It is preferable to mix the granulated product and the granulated product containing a thiosulfate and then perform compression molding.

The granulation method for tablet formation includes rolling granulation,
Known methods such as extrusion granulation, compression granulation and fluidized bed granulation can be used. The average particle size of the obtained granules is 100.
˜1500 μm is preferable from the viewpoint of the effect of the present invention, and more preferably 300 to 1000 μm.

The tablet of the present invention is a known compressor such as a hydraulic press, a single-shot tableting machine, a rotary tableting machine,
It can be manufactured using a briquetting machine.

In the tablet of the present invention, the ratio x / h of the length x and the thickness h in the longitudinal direction of the tablet is preferably in the range of 1.0 to 6.0 from the viewpoint of the effect of the present invention, more preferably 2.5 to
It is 5.0. When the above ratio is less than 1.0, not only the effect of the present invention obtained is weakened, but also the solubility is deteriorated and the productivity is deteriorated. If it exceeds 6.0, the desired strength cannot be obtained.

In the present invention, the length of the tablet in the longitudinal direction refers to the diameter of the circle when the tablet has a disk shape, and when the tablet has a polygonal shape, the surface in contact with the compression surface of the hardness tester in parallel. This is the distance to the point or surface that is farthest from the surface of the hardness meter for compression preservation. In the case of a deformed shape in which ellipses, circles, polygons, etc. are combined, the distance from the point of contact with the compression surface of the hardness tester to the longest point in the compression direction is indicated.

The above hardness tester is a known tablet hardness tester, and examples thereof include Speed Checker (Okada Seiko Co., Ltd.).

The tablet of the present invention can have any shape, but a disk-shaped tablet is preferable from the viewpoint of productivity and handleability. In the case of the disk-shaped tablet, the length in the longitudinal direction of the tablet refers to the diameter of the tablet, but the diameter at this time can be any value depending on the purpose of use. From the viewpoint of productivity, it is preferably 5 to 50 mm, more preferably 7 to
It is 30 mm.

The thiosulfate salt used in the solid treating agent of the present invention is preferably ammonium thiosulfate or an alkali metal thiosulfate, and the alkali metal salt is preferably a sodium salt or a potassium salt from the viewpoint of processability. From the viewpoint of strength, it is preferable that the tablet contains 20 to 70 wt% of thiosulfate, and more preferably 30 to 60 wt%.

As the aminopolycarboxylic acid ferric iron complex salt used in the solid processing agent of the present invention, the following general formulas A-A to A-A are used.
Examples include compounds represented by -IV.

[0021]

[Chemical 1]

[In the formula, A _{1 to} A ₄ may be the same or different and each represents a hydrogen atom, a hydroxy group, —COOM or —PO
₃ (M ₁ ) ₂ , —CH ₂ COOM ₂ , —CH ₂ OH or a lower alkyl group. However, at least one of A _{1 to} A ₄ is -COOM, -PO
₃ (M ₁ ) ₂ and —CH ₂ COOM ₂ . M, M ₁ and M ₂ each represent a hydrogen atom, an ammonium group, an alkali metal or an organic ammonium group. ]

[0023]

[Chemical 2]

[In the formula, A _{11 to} A ₁₄ may be the same or different and each represents —CH ₂ OH, —COOM ₃ or —PO ₃ (M ₄ ) ₂ . M
₃ , M ₄ each represents a hydrogen atom, an ammonium group, an alkali metal or an organic ammonium group. X has 2 to 6 carbon atoms
Represents an alkylene group or — (B ₁ O) n—B ₂ —. n is 1 to 8
And B ₁ and B ₂ may be the same or different and each represents an alkylene group having 1 to 5 carbon atoms. In the general formula [A-II], examples of the alkylene group represented by X include groups such as ethylene, propylene and butylene. In-(B ₁ O) n-B ₂ represented by X, examples of the alkylene group represented by B ₁ and B ₂ include methylene, ethylene and trimethylene. These alkylene groups have a lower alkyl group such as a methyl group or an ethyl group as a substituent,
It may have a hydroxy group or the like.

[0025]

[Chemical 3]

[In the formula, R _{1 to} R ₃ each represent a hydrogen atom, an optionally substituted alkyl group or an aryl group. W
Represents a divalent linking group. L is

[0027]

[Chemical 4]

Y _{1 to} Y ₃ each represent an alkylene group or an arylene group, X ₂ and X ₃ each represent an oxygen atom or a sulfur atom, R _{3 to} R ₇ each represent a hydrogen atom, It represents an alkyl group or an aryl group. ] R ₁
The alkyl group represented by R ₃ has 1 to 1 carbon atoms.
Examples thereof include linear, branched and cyclic groups of 0, and a methyl group and an ethyl group are particularly preferable. The aryl group represented by R _{1 to} R ₃ is preferably a phenyl group. When R ₁ and R ₂ are alkyl groups or aryl groups, they may have a substituent. Examples of the substituent of R _{1 to} R ₃ include an alkyl group, aralkyl group, alkenyl group, alkynyl group, alkoxy group, aryl group, substituted amino group, acylamino group, sulfonylamino group, ureido group, urethane group, aryloxy group. , Sulfamoyl group, carbamoyl group,
Alkylthio group, arylthio group, sulfonyl group, sulfinyl group, hydroxy group, halogen atom, cyano group,
Sulfo group, carboxy group, phosphono group, alkoxycarbonyl group, aryloxycarbonyl group, acyl group, acyloxy group, carbonamido group, sulfonamide group,
A nitro group and the like can be mentioned, but preferably,

[0029]

[Chemical 5]

It is a substituent represented by: Where Ra and R
b, Rc, Rd and Re represent a hydrogen atom, an alkyl group or an aryl group.

Next, examples of the alkylene group represented by Y _{1 to} Y ₃ include methylene group, ethylene group and propylene group, and examples of the arylene group include phenylene group. The alkylene group and arylene group represented by Y _{1 to} Y ₃ may have a substituent. As the substituent, for example, those enumerated above as the substituents of R _{1 to} R ₃ can be applied, but preferably —OH —COOH —CH ₂ COOM —CH ₂ OH —CONH ₂ —CH ₂ CONH ₂ —CONHCH ₃ (M represents a hydrogen atom, an alkali metal or an ammonium group).

In the above general formula [A-III], the divalent linking group represented by W is preferably an alkylene group having a prime number of 2 to 8 (including a cyclohexylene group) and a carbon number of 6 to 6. 10 arylene groups,

[0033]

[Chemical 6]

(B ₁ and B ₂ represent an alkylene group or an arylene group, and n represents 1 to 3),

[0035]

[Chemical 7]

(Z is a hydrogen atom, unsubstituted or -COOM,-
SO ₃ M, an —OH-substituted alkyl group, or an aryl group, and M represents a hydrogen atom, an alkali metal, or an ammonium group), and a combination thereof may be used.

[0037]

[Chemical 8]

[In the formula, R _{1 to} R ₃ and R _{6 to} R ₉ each represent a hydrogen atom, an optionally substituted alkyl group or an aryl group, and R ₄ and R ₅ each represent a hydrogen atom, a halogen atom,
A cyano group, a nitro group, an acyl group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl group, an allyloxycarbonyl group, a sulfonyl group, a sulfinyl group, an optionally substituted alkyl group or an aryl group, and R ₄ and R ₅
May together form a 5-membered ring or a 6-membered ring.
A represents a carboxy group, a phosphono group, a sulfo group, a hydroxy group, or an alkyl metal salt or ammonium salt thereof. Y represents an alkylene group or an arylene group and may have a substituent. t and u each independently represent 0 or 1. Among the compounds represented by the general formula [A-IV], preferred are the compounds represented by the following general formula [BI] or [B-II].

[0039]

[Chemical 9]

[Wherein R ₁ and R ₂ are each a hydrogen atom,
It represents an alkyl group or an aryl group, L _{1 to} L ₄ each represent an alkylene group or an arylene group, and M ₁ and M ₂ each represent a hydrogen atom, an alkali metal, an ammonium group or an organic ammonium group. ]

[0041]

[Chemical 10]

[In the formula, R _{1 to} R ₄ are each represented by the general formula [B-
I] and R ₁ and R ₂ have the same meanings, and L _{1 to} L ₄ and M ₁ and M ₂ also have the same meanings as those of the general formula [BI]. ]

[0043]

[Chemical 11]

[0044]

[Chemical 12]

[0045]

[Chemical 13]

[0046]

[Chemical 14]

[0047]

[Chemical 15]

[0048]

[Chemical 16]

[0049]

[Chemical 17]

[0050]

[Chemical 18]

[0051]

[Chemical 19]

[0052]

[Chemical 20]

[0053]

[Chemical 21]

[0054]

[Chemical formula 22]

In the present invention, as the bleaching agent, in addition to the iron complex salts of the compounds represented by the above general formulas [AI] to [A-IV], the ferric iron complex salts of the following compounds can be used.

[A'-1] ethylenediaminetetraacetic acid [A'-2] trans-1,2-cyclohexanediaminetetraacetic acid [A'-3] dihydroxyethylglycine [A'-4] ethylenediaminetetrakismethylenephosphonic acid [A '-5] Nitrilotrismethylenephosphonic acid [A'-6] diethylenetriaminepentakismethylenephosphonic acid [A'-7] diethylenetriaminepentaacetic acid [A'-8] ethylenediaminedioltohydroxyphenylacetic acid [A'-9] hydroxyethyl Ethylenediaminetriacetic acid [A'-10] Ethylenediaminepropionic acid [A'-11] Ethylenediaminediacetic acid [A'-12] Hydroxyethyliminodiacetic acid [A'-13] Nitrilotriacetic acid [A'-14] Nitrilotripropionic acid [A'-15] triethylenetetramine hexaacetic acid [ '-16] Ethylenediaminetetrapropionic acid [A'-17] 1,3-Propylenediaminetetraacetic acid [A'-18] Glycol etherdiaminetetraacetic acid Examples further described in JP-A-4-174432, pages 7 to 11 Compounds 1 to 71, ferric iron complex salts of Exemplified Compounds 1 to 36 described in No. 4-204533, pages 25 to 30, and the like can also be used.

It is preferable that the above iron complex salt is contained in a tablet in an amount of 10 to 70 wt% from the viewpoint of storage stability, and more preferably 20 to 60 wt%.

[0058]

EXAMPLES The present invention will be specifically described below in Examples 1 to 5.

Example 1 A tablet sample was prepared according to the following procedure.

1. Preparation of bleach-fixing tablet sample for color paper (1) Diethylenetriamine pentaacetate ferric ammonium bisulfate monohydrate
3600 g and 36 g of diethylenetriamine pentaacetic acid are ground in a commercially available hammer mill until the average particle size becomes 30 μm or less.
Next, the obtained fine powder was mixed for 10 minutes in a commercially available stirring granulator, and then 200 ml of water was added to granulate. The obtained granulated product was dried at 65 ° C. for 2 hours in a fluidized bed dryer to remove almost completely the water content in the granulated product to obtain a granular sample A.

Operation (2) Ammonium thiosulfate 2800 g, sodium sulfite 700
Operate 175g of Pine Flow (Matsuya Chemical Co., Ltd.) (1)
After crushing and mixing in the same manner as in (1), 130 ml of water was added for granulation. Next, the obtained granulated product was dried at 60 ° C. for 2 hours to almost completely remove the water content in the granulated product to obtain granule sample B.

Operation (3) The additives shown in Table 1 were added to the granules A obtained in the operation (1) so that the content was 12% by weight, and 3259 g of this mixture was the granules obtained in the operation (2). B: 3675 g, 35 g of N-lauroyl sarcosine sodium were added and mixed for 10 minutes, and the obtained mixture was adjusted to a tablet weight of 12.0 g using a tableting machine modified from Tough Press Collect 18HU manufactured by Kikusui Seisakusho KK At 12
Tablet sample No. 1 with a diameter of 30 mm was obtained by compression tableting at a pressure of t.
580 pieces of 1 to sample No. 1-25 were obtained.

2. Preparation of Comparative Tablet Sample A Operation (4) Granule sample A was obtained by crushing, mixing, granulating and drying 3600 g of diethylenetriamine pentaacetic acid ferric ammonium II monohydrate and 36 g of diethylenetriamine pentaacetic acid in the same manner as in operation (1). It was

Operation (5) The same operation as the operation (2) was performed to obtain a granular sample B.

Operation (6) N-lauroyl sarcosine sodium was added to the granule sample A: 3259 g and the granule sample B: 3675 g obtained in the operations (4) and (5).
After adding 35 g, mixing and tableting were performed in the same manner as in the operation (3) to obtain 580 tablet samples A.

2. Experiment The following experiment was performed using the tablet sample obtained by the above operation.

Experiment 1: Evaluation of Adhesion Five tablet samples were placed in a bag of high density polyethylene (HDPE), hermetically sealed, and stored at 40 ° C. and 80% RH for 4 weeks. After storage, the seal was opened and the appearance of each tablet sample and the degree of adhesion of each sample to the packaging material were observed.

⊚: The surface of the tablet sample is smooth,
No adhesion of sample to packaging material or adhesion of sample to each other ○: Adhesion of sample to packaging material and adhesion of sample to each other is slightly observed, but there is no problem △: Tablet sample is localized to packaging material Adhesion to the sample is observed. X: The sample is heavily adhered to the packaging material and it is difficult to take out all the solid processing agent in the packaging material. Experiment 2: Evaluation of wear resistance Five tablet samples were tested for tablet friability. Vessel (Kayagaki Medical Science Co., Ltd.)
The tester was rotated for 5 minutes at 20 rpm using a modified product), and the generation rate of fine powder after rotation was determined as 0% before rotation. The larger this value is, the larger the generation of fine powder is, which means that the tablet is easily worn. The results are shown in Table 1.

[0069]

[Table 1]

As is apparent from Table 1 above, the tablet of the present invention is smooth without long-term storage, the surface condition is not changed, and the generation of fine powder is small, the strength is excellent, and the handleability is extremely excellent. I understand.

Example 2 1. Preparation of tablet sample A Operation (1) Ethylenediaminetetraacetic acid sodium ferric iron trihydrate; 600
0.00.0 g, ethylenediamine tetraacetic acid; 300.0 g, and sodium carbonate monohydrate; 400.0 g are ground using a commercially available hammer mill until the average particle size becomes 80 μm or less. Next, the obtained fine powder is mixed in a stirring granulator for 10 minutes, and then polyethylene glycol # 4000 (manufactured by NOF CORPORATION, the addition amount is shown in Table 2) is added and mixed to granulate. The amount of water added was 200 ml, and after granulation, the granulated product was dried for 3 hours at 60 ° C. to almost completely remove water.

Procedure (2) 8000.0 g of ammonium thiosulfate; 8000.0 g of sodium metabisulfite; 3000.0 g were crushed in the same manner as in the procedure (1), and then pine flow maltodextrin of Matsutani Chemical Co., Ltd .; 40
Add 0.0 g, mix and granulate. The amount of water sprayed is 170 ml, and after granulation, it is dried at 60 ° C. for 120 minutes to almost completely remove the water content of the granulated product.

Operation (3) The granule samples prepared in the above operations (1) and (2) were mixed at room temperature with a commercially available cross rotary mixer for 10 minutes, and then N-lauroylsarcosine sodium; 90.0 g
And mix for 3 minutes. The mixed granules thus obtained were continuously tableted with a rotary tableting machine to give a diameter of 30 m.
Tablet samples A-1 to A-10 having m and a weight of 11.0 g were respectively obtained in 1700 pieces.

2. Preparation operation of sample tablet B (4) Ethylenediaminetetraacetic acid sodium ferric iron trihydrate 6000.0
g, ethylenediaminetetraacetic acid; 300.0 g, sodium carbonate monohydrate; 400.0 g, ammonium thiosulfate; 8000.0
300 g of sodium metabisulfite (3000.0 g) is pulverized using a commercially available hammer mill until the average particle size becomes 80 μm or less. Next, pine flow; 1000.0 g, and polyethylene glycol # 4000 (addition amount is shown in Table 2) were added and mixed at room temperature for 10 minutes using a commercially available cross rotary mixer, and further N-lauroyl sarcosine sodium; 90.0 g And mix for 3 minutes. The mixed granules thus obtained were continuously tableted with a rotary tableting machine to give tablet samples B-1 to B-10 each having a diameter of 30 mm, a thickness of 10 mm and a weight of 12.5 g.
I got 00.

2. Experiment The following experiment was performed using the tablet sample obtained by the above operation.

Experiment 1: Evaluation of Adhesion Five tablet samples each were placed in a bag of high density polyethylene (HDPE), hermetically sealed, and stored at 25 ° C. and 80% RH for 4 weeks. After storage, the seal was opened and the appearance of each tablet sample and the degree of adhesion of each sample to the packaging material were observed.

⊚: The surface of the tablet sample is smooth,
No adhesion of sample to packaging material or adhesion of sample to each other ○: Adhesion of sample to packaging material and adhesion of sample to each other is slightly observed, but there is no problem △: Tablet sample is localized to packaging material Adhesion to the sample is observed. ×: The sample is heavily adhered to the packaging material, and it is difficult to take out all of the solid processing agent in the packaging material. Experiment 2: Evaluation of abrasion resistance Ten tablets each packed in HDPE were sampled. After storing at 50 ° C for 1 month, first open the seal, measure the weight, return to the packaging material and seal again. Vibration tester BF-U made by IDEX Co.
A vibration test (test condition: 5 to 67 Hz cycle, 5 minutes for 24 sets, 120 minutes) is performed using A. Next, the friability of each tablet-type treating agent after storage was determined from the formula shown below to evaluate friability.

Friability (wt%) = (tablet 10 before vibration test
Tablet weight-weight of 10 tablets after vibration test) ÷ weight of 10 tablets before vibration test x 100 ◎: Friability: less than 0.01% Almost no adhesion of fine powder to packaging material ○: Friability : 0.03 to 0.1% There is a slight adhesion of fine powder to the packaging material, but there is no problem when opening. △: Friability: 0.1 to 0.4% Adhesion of fine powder to the packaging material is observed ×: Significant generation of fine powder Yes, fine powder flies when opened.

Experiment 3: Evaluation of tableting property The state of weight loss adhesion to the mold (upper and lower punches) during tableting was observed.

⊚: All the tablets were free from adhesion of raw materials to the pestle after tableting, and no problem was observed. ◯: Although the surface of the pestle was slightly clouded, normal tablets were obtained and there was no practical problem. (Triangle | delta): Adhesion (sticking) is seen on the surface of the punch, and the resulting tablet surface has fine irregularities. X: Sticking is severe and tableting is difficult.

[0081]

[Table 2]

As is clear from Table 2 above, the inclusion of the polymer compound of the present invention in an amount of 10 to 50 wt% improves not only the adhesion and strength during long-term storage but also the tableting property (productivity). I understand that In addition, the above-mentioned effect is further improved by separately preparing a granulated product containing an aminopolycarboxylic acid ferric iron complex salt and a granulated product containing a thiosulfate, mixing these and then tableting. It turns out that

Example 3 Instead of the ethylenediamine tetraacetic acid iron II sodium trihydrate used in Sample A-5 of Example 2, the same amounts of the exemplified compounds AI-2, A-II-1, and A were used. −
Tablets were prepared by following the same procedure and operation as Sample A-5, except that the ferric iron complex salts of III-3 and A-IV-1 (ammonium salt and sodium salt) were used. The same experiment as in Example 1 was conducted using the sample. As a result, the same result as in Example 1 was obtained.

Example 4 The same formulation and operation as in Sample A-5 except that the same amounts of sodium thiosulfate and potassium thiosulfate were used in place of the ammonium thiosulfate used in Sample A-5 of Example 2. A tablet sample was prepared. Next, the same experiment as in Example 1 was conducted using the obtained tablet sample. As a result, the same result as in Example 1 was obtained.

Example 5 The tablet diameter and thickness were changed by adjusting the weight of the die or tablet of the tabletting machine using the formulation used for sample A-5 of Example 2 (see Table 3). ) Tablet samples 4-1 to 11 were prepared and the same experiment as in Example 2 was performed. The results are shown in Table 3.

[0086]

[Table 3]

From Table 3 above, the ratio (x / h) of length (diameter in this embodiment): x and thickness: h of the tablet in the longitudinal direction was 1.0 to
It can be seen that the effect of the present invention is better exhibited when it is in the range of 6.0.

[0088]

Since the present invention is constructed as described above, it has the following effects.

Excellent storage stability for a long time, easy to transport and handle, and easy to use. It has sufficient strength and does not easily generate fine powder, and is excellent in dissolution.

Claims (4)

[Claims] 1. A silver halide containing at least one compound selected from polyethylene glycols, polyvinylpyrrolidones and polyvinyl alcohols, and at least one thiosulfate salt and an aminopolycarboxylic acid ferric iron complex salt. Tablet processing agent for processing color photographic light-sensitive materials. 2. At least one compound selected from polyethylene glycols, polyvinylpyrrolidones and polyvinyl alcohols is contained in the tableting agent in an amount of 10 to 50 wt.
%, The tablet-like processing agent for processing a silver halide color photographic light-sensitive material according to claim 1. 3. The tablet is obtained by mixing a granulated product containing at least an aminopolycarboxylic acid ferric iron complex salt and a granulated product containing a thiosulfate, followed by compression molding. The tablet-form processing agent for processing silver halide color photographic light-sensitive material according to claim 1 or 2. 4. The length x of the tablet treatment agent in the long direction.
The tablet form for processing a silver halide color photographic light-sensitive material according to any one of claims 1 to 3, wherein the ratio of (mm) to thickness h (mm): x / h is 1.0 to 6.0. Processing agent.