JPS62183458A - Ready mixed processing agent for color development - Google Patents

Abstract

PURPOSE:To stabilize a fluorescent bleaching agent and to maintain the effect to improving a white ground by using the triazinyl stilbene fluorescent bleaching agent, hydroxylamine and/or the salt thereof and water as essential constituting elements. CONSTITUTION:The triazinyl stilbene fluorescent bleaching agent is incorporated into an aq. soln. of the hydroxylamine and/or the salt thereof. The amt. at which the triazinyl stilbene fluorescent bleaching agent is incorporated into a ready mixed processing agent for color development is in a 1-300g range per l of the ready mixed processing agent for color development. The amt. at which the hydroxylamine and the salt thereof is incorporated is in a 20-60g range per l of the ready mixed processing agent for color development. The ready mixed processing agent for color development has <=7.0 pH value and contains substantially no solvents of >=0.4 log P which are generally used as an accelerator. The triazinyl stilbene fluorescent bleaching agent is thereby made stable and the decrease of the effect of improving the white ground is minimized even after long-period preservation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compounded processing agent for color development, and more particularly to a compound processing agent for color development containing a triazinylstilbene-based fluorescent whitening agent used in a color development solution for silver halide color photographic light-sensitive materials. This relates to a compounded treatment agent.

Generally, after color photographic paper is exposed to light, it undergoes processing steps that mainly include color development using a paraphenylenediamine developing agent, bleach-fixing, washing with water, or stabilization treatment as an alternative to washing with water, to produce color prints. In this case, it is extremely important that color prints have excellent color reproducibility and whiteness of unexposed areas, so-called whiteness. As a technique for improving this white background property, a technique of adding a triazinylstilbene-based fluorescent whitening agent to a color developing solution is known, such as in U.S. Pat. It is put into practical use.

Usually, color developing solutions used for processing silver halide color photographic materials contain, for example, p-phenylenediamine derivatives or salts thereof as color developing agents, carbonates, borates, or phosphates as alkaline agents, Contains developer components such as sulfites and hydroxylamine salts as preservatives, and also contains poorly soluble solvents (hereinafter!, solvents with an og P of 0.4 or more) as development accelerators depending on the polishing process. ), for example, benzyl alcohol, chelating agents such as amine carmenic acid, organic phosphonic acid, etc.

Such a color developing solution is used continuously, and when used for a long period of time, its main components are consumed or the added components are eluted from the photosensitive material being processed, so that the color developing tank solution is activity is lost, and the resulting image characteristics often deteriorate.

Therefore, generally, a color developer replenisher is prepared and used for the purpose of replenishing the developing components lost during the above continuous processing or diluting the additive components etc. eluted from the photosensitive material. A method of replenishing the color developing tank solution in small amounts is practiced.

In order to simplify the preparation of this color developing tank liquid or color developing replenisher, it is generally divided into 3 to 5 parts and concentrated and stored, and immediately before use, the divided preparation process is carried out on a certain amount of water. Prepared by mixing and dissolving the agent (concentrated stock). Here, the triazinylstilbene-based fluorescent brightener can be stored as an independent part of a powder or as a tog P of 0.
A method (described in JP-A-60-220344) in which a part mainly contains four or more solvents, such as benzyl alcohol, is known.

Among the above methods, even when a solvent with a Log P of 0.4 or more is contained in a part mainly composed of a solvent, the solubility of the fluorescent brightener is not sufficient, so a large amount of ethylene glycol,
Triethanolamine etc. were required. Moreover, when the fluorescent whitening agent is affixed to Nokuto whose main component is a solvent with a Log P of 0.4 or more, the fluorescent whitening agent decomposes during long-term storage and becomes unstable. However, there was a drawback that the effect of improving the white background was reduced.

It is also known to use the fluorescent brightener as a separate powder in order to prevent its decomposition.

However, in the case of a single powder, handling is complicated because the number of divided processing agents increases, and since it is a powder, it is difficult to work in the work environment and takes time to dissolve. Undesirable. Therefore, it is preferable to use the fluorescent brightener alone and not as a powder. for that,
It is also conceivable to use the fluorescent brighteners, for example as an aqueous solution.

However, there is always a strong desire to reduce the number of processing agents for preparation (divided) because this improves dissolution workability and reduces dissolution errors.

[Purpose of the invention]

Therefore, it is an object of the present invention to provide a liquid and stable color developing treatment agent for triazinylstilbene-based fluorescent brighteners used in color developing solutions, which is easy to handle.
The object of the present invention is to provide a mixed processing agent for color development which can reduce the number of divided processing agents for color development by one part.

[Structure of the invention]

The above-mentioned object of the present invention can be achieved by a compound processing agent for color development which contains a triazinylstilbene fluorescent brightener, hydroxylamine and/or its salt, and water as main components.

The present invention will be explained in detail below.

Generally, the hydroxylamine is susceptible to catalytic decomposition by other components and is therefore very unstable, and is stored in the form of a single powder or an aqueous solution. However, as a result of intensive research by the present inventors, when the triazonylstilbene-based fluorescent brightener was incorporated into an aqueous solution of the hydroxylamine and/or its salt, no problems were found with respect to the stability of the hydroxylamine itself. Moreover, the above-mentioned triazinylstilbene-based fluorescent brightener also has tag P.
It was found that the decomposition was extremely small and the white background improvement effect was not reduced compared to the case where the main component contained a solvent having a particle diameter of 0.4 or more.

The triazinylstilbene type fluorescent brightener used in the present invention is preferably one represented by the following general formula.

1Y2 In the formula, x , x , y and Y2 are each a hydroxyl group,
Halogen atoms such as chlorine and bromine, alkyl groups (e.g. methyl, ethyl, etc.), aryl groups (e.g. FeR20 each has a hydrogen atom, an alkyl group that may have a tt substituent, or an aryl group that may have a substituent) groups, R2, and R2□
each represents an alkylene group which may have a substituent, 8□
3 represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and M represents a cation (eg, sodium, potassium, ammonium, etc.).

The alkyl group represented by the above R191R20 and R23 preferably has 1 to 6 carbon atoms, and the above R21 and R2□
The alkylene group represented by preferably has 1 to 2 carbon atoms.

R1 above? l Preferred substituents for the alkyl group and aryl group represented by R20 and R25 and the alkylene group represented by R and R2□ are a hydroxy group, a sulfo group, a sulfoamino group, and a carboxyamino group.

mino groups (e.g. methylamine, ethylamine, propylamine, dimethylamino, cyclohexylamino, β-
Hydroxyethylamino, di(β-hydroxyethyl)
amino, β-sulfoethylamino, N-(β-sulfoethyl)-N'-methylamino, N-(β-hydroxyethyl)-somethylamino, etc.) or arylamino groups (e.g. anilino, o-, m-, p-sulfoanilino,
o-.

m-, p-chloroanilino, O-+ m-e p-
) luidino, o-, m”', p-calgexyamino, o-, m-, p-hydroxyanilino, sulfonaphthylamino, o-, m-, p-aminoanilino, 0-, m
Specific examples of -0R5 include alkoxy groups (e.g., methoxy, ethoxy, methoxyethoxy, etc.) and aryloxy groups (e.g., phenoxy, p-sulfophenoxy, etc.). Can be mentioned.

Among the fluorescent brighteners represented by the above general formula, preferred compounds are x, x4. y and Y2 are all objects,
The most preferable compound is one in which X3 and Yl are 1υ, and one of X4 and Y2 is 10R23, and the other is specific examples, but are not limited to, the following compounds.

The triazinylstilbene type fluorescent whitening agent used in the present invention can be synthesized, for example, by the usual method described in “Fluorescent Brightener J” (published in August 1976) edited by Japan Chemical Industry Association, page 8. - The above-mentioned triazinylstilbene-based fluorescent brightener used in the present invention can more effectively achieve the purpose of the present invention when the ki major fluorescent wavelength λmax of the fluorescent spectrum is 433 to 440 nm. achieved.

The amount of the triazinylstilbene type fluorescent whitening agent added to the color developing solution is preferably in the range of 0.05 iP to 100 iP, more preferably 0.19 to 2.
0g, most preferably 0.2g to 10g. is within the range of

Hydroxylamine and/or its salts used in the present invention are generally used as preservatives for color developing salts, and include human trokylamine and/or its hydrochloride, sulfate,
Nitrate, sulfanilate, etc. can be represented by the following general formula.

NH2OH-X X represents an inorganic acid such as sulfuric acid or hydrochloric acid, or an organic acid such as acetic acid or conolic acid.

The amount added to the color development fake night is 0.1 to 100 per 11? It is preferably in the range of 0.2 to 20? within the range of
The most preferred range is from 0.5 to 10 degrees.

It is preferable that the mixed processing agent for color development of the present invention is concentrated for transportation.
It is preferable to concentrate to a range of 00 m/m, more preferably to a range of 15 to 50 m/m. The amount of the triazinylstilbene-based fluorescent whitening agent contained in the mixed processing agent for color development is preferably in the range of 1 to 300j', more preferably 20 to 300j'. 200? is within the range of The amount of hydroxylamine and its salts contained is 20 to 600% per 1 of the above-mentioned color development processing agent. It is preferably in the range of 50 to 500/-, and more preferably in the range of 50 to 500/-.

It is preferable that the mixed processing agent for color development of the present invention has a single value of 7.0 or less, more preferably PHO, s to -6,
0, most preferably pH 1.0 to pH 5,
It is in the range of 0.

Further, it is preferable that the color development compound processing agent of the present invention does not substantially contain a solvent having a Log P of 0.4 or more, which is generally used as an accelerator. Here, "substantially no content" means that the content of the color development processing agent 11 is 20 d or less, preferably zero.

Although the compound processing agent for color development of the present invention uses water as a solvent, there is no problem in containing a highly water-soluble solvent having a Log P of 0.4 or less.

The poorly soluble solvent according to the present invention is a solvent with a Log P of 014 or more, and the Log P is a value determined from the partition coefficient P of n-octatool/water. The P value is calculated using the following formula: % The logarithm of the P value obtained in this way is the Log P value, and this value has traditionally been widely used in the field of concentrated pharmaceuticals as a measure of fat solubility. . The LogP value is ``Chemical Review, -(Chemical Review
) It can also be known from LOKPor-t in the table described in J Magazine, Vol. 71, No. 6, 1971, pp. 555-613. For example, "Ecochemistry" Vol. 6, pp. 3-1
Although it can also be determined by the calculation method described on page 1, it is preferable to use an actual measured value, and particularly preferably n
- It is preferable to use values measured using ophthal.

The above-mentioned poorly soluble solvent is generally used as an accelerator for color developing solutions, but when added to the color developing compound processing agent of the present invention, it separates into two layers, which is not preferable.

In the present invention, the solvent with M, LogPo, which is not preferable to be added to the color development processing agent, and 4 or more solvents are aliphatic alcohols, aliphatic glycol ethers, alicyclic alcohols, or aromatic alcohols. Of which, carbon number is 5 to 20
A specific example is benzyl alcohol LogP 1.10
0-Hydroxynebenzyl alcohol Log
P 0.73 cyclohexano-h L
ogP 1.232-pencyloxyethanol
LogP O,41 anisyl alcohol
Log 0.701-Pentanol
togPo, 4 or more phenylethyl alcohol togP 1.36 p-tolylcarbinol tOgP 1.36 n-butanol Log 0.4 or more phenol p-hydroxybenzyl alcohol pen zolamine l diethylene glycol motuptyl ether LogPo, 41, and the like.

In addition, togPo, solvents with less than 4 carbon atoms are mainly those with 0 to 4 carbon atoms, such as aliphatic alcohols and organic acids.
Although the ogPo may be less than 4 and is not particularly limited, specific examples include the following solvents. More than L
For the og P value, the value measured using the octatool described in the above-mentioned Chemical Revier magazine is mainly used, and if the value measured using the octatool is not available, the value measured using other solvents is used as a substitute. It can also be measured using

Acetic acid ethanol Acetone Zoropionic acid Propatur Ethylene glycol Diethylene glycol Triethylene glycol Triethanolamine Polyethylene glycol The compound processing agent for color development of the present invention may contain any compound other than those mentioned above as long as it does not cause any problems. A chelating agent is a compound other than the above that is preferably contained in the color development processing agent.

Preferred chelating agents for the present invention are compounds represented by any of the following general formulas (1) to [Kari].

General formula (1) MmPm03m General formula CII: l Mn + 2Pn03n +
1 General formula (I[l) A, -R, -Z-R2-CO
In the OH formula, E is a substituted or unsubstituted fullkylene group, cycloalkylene group, phenylene group, -R, -OR, -.

-R, -OR, OR, -1-R7ZR7-, 2 represents >N-a, -h6゜', N-h6, R1-R7 represents a substituted or unsubstituted fullkylene group, A1 to A6 is hydrogen, -OH, -COOM.

-PO5M2, M represents hydrogen or an alkali metal atom, m represents an integer of 3 to 6, and n represents an integer of 2 to 20.

In the general formula (V) R8N(CH2PO3M2)2, R8 is a lower alkyl group, an aryl group, an aralkyl group,
Nitrogen-containing 6-membered group [-OH as a substituent.

-OR, -COOM), and M represents a hydrogen atom or an alkali metal atom.

General formula [■] In the formula, R7-R11 is a hydrogen atom, -0H1 lower alkyl (unsubstituted or as a substituent -OH, -COOM).

-PO3M2), B, ~B3 are hydrogen atoms, -O
H.

-COOM, -PO, M2. -Nj2, J is a hydrogen atom, lower alkyl t C2I (40H, -PO3M
2, M represents a hydrogen atom or an alkali metal, n, m
represents 0 or 1.

General formula [■] 0M R-0-P-OR4゜In the formula, R and R are hydrogen atoms, alkali metals, C4 to C42
represents an alkyl group, alkenyl group, or cyclic alkyl group.

General formula [■] In the formula, R14 is an alkyl group of 01 to 2, an alkoxy group of C4 to 1□, a monoalkylamino group of 01 to 1□, C
2-, 2 dialkylamino group, amine group, 01-24
represents an aryloxy group, a C6-24 arylamino group, and an amyloxy group, and Q and ~Q3 are -OH, C, ~24
shows an alkoxy group, an acylkyloxy group, an amyloxy group, -0M3 (M is a cation), an amine group, a -morpholino group, a cyclic amino group, an alkylamine group, a dialkylamino group, an arylamino group, and an alkyloxy group.

General formula CD0 OH General formula (X) In the formula, R151R461R17 and R18 each represent a hydrogen atom, a halodane atom, a sulfonic acid group, a substituted or unsubstituted alkyl group having 1 to 7 carbon atoms, and represent an unsubstituted phenyl group . R311R5□, R35 and R54 each represent a hydrogen atom or an alkyl group having 1 to 18 carbon atoms.

General Formula (XI) In the formula, R24 and R25 represent a hydrogen atom, a halogen atom, or a sulfonic acid group.

General formula [Kari] In the formula, R29 and R5. are hydrogen atom, phosphoric acid group, calgenic acid group, -CH2COOH, -CH2PO3, respectively
H2 or a salt thereof, X represents a hydroxyl group or a salt thereof, and Wl, Z, and Y each represent a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a carboxylic acid group, a phosphoric acid group, and a sulfonic acid group. represents a group or a salt thereof, an alkoxy group or an alkyl group. Also, m is O or 1, n is 1
~4 integer, ■1 is 1 or 2, pl is an integer from 0 to 3, q
l represents an integer of 0 to 2.

Specific examples of the chelating agents represented by the general formulas [1] to [Kari] are as follows.

[Exemplary chelating agent]

(1) Na4P4012 (2) Na
, P, 0° (3) H4P2O7 (4) H3P3o
10(s) Nmbp4o15 0■ αJα0 (HOC2H4)2NCH2COOH + (Ha) (Ha)
翰PO3Na 2 CH2-PO3H
2 (3]) (To) (To) (B) 0S
(to) 0″I)
(To) PO, H2C1-12COOH 翰 顛PO, H2PO, H, 2 0υ (6) CH2P
O3H2PO3H2 (c) (c) @'I
) to) 151+
52631
OH0H 1551511G H PO,H2 6η Trowel I OH H2O,P-C-PO,H2'' 2H5H HOCH2CH(OH)-CH20-P-(ONm)2
Muυ HOCH2CH20-P -(OH) 2ll0CH2
CH-0-P-(ONa)2OH20H OH OH2 6η Delivery H2N-CH2
CH2-0-P-(OH)2IG σD σ3H2N-C00
-P-(OK)2H3C-Coo-P-(OH)2HO
H σ滲CH.

0K 0H C2H50-P-QC2H5 I8 σ sickle 〇　　〇 OHOH HO-P-C-P-OH HOHOH sister I(0-P-C-P-OH HOHOH (c) O0 HO-P-CH-P-OH 0HOHOH (Foundation) O0 0CI (30CH.

■ Role) (c) Axis 803HC0
0CR3 (g) 0υ □□
□CH2COOHCH2C00H (Foundation) CH2C0OHC) (2C00HCH2C00HCH2
PO3H2CH2PO3H2 (9Iil CH2COOHCH2C0OH) CH2C00HCI (2COOH C0OHC00H OH2COOHC1 (2COOH) CH2PO3Na2 CH2COONa CH2COONaCCH2C00
N CH2C00HCH2C0C) NIL CH
2C00Na In the present invention, the general formula (■), (V
], (Vl).

It is effective to use chelating agents represented by (IX) and [Kari], especially (52), (ss), (
89), (93).

(97) and (101) are particularly effective. The above CD~
The chelating agent indicated by [Kari] is a compound processing agent 1 for color development.
Noto, D 0.1~300? It is preferable to use it in the range of 1 to 100F, more preferably in the range of 1 to 100F.

The present invention relates to a compound processing agent for color development that is subdivided into a color developer to prepare a color developer (tank solution, replenisher, regenerating solution, etc.). In addition to compound processing agents for color development, color developing agents,
An alkaline agent such as sulfite is required, and in order to make the present invention effective, it consists of a color developing agent and a small amount of sulfite. p4
It is preferable to use a three-liquid solution including part 1, part consisting of a buffer agent, sulfite, and chelating agent, and part 1 of the present invention. However, in addition to this, it is also possible to prepare a part whose main component is LogPo, 4 or more solvents.

As the color developing agent, a p-phenylene color developing agent is generally used, and as the color developing agent, a compound represented by the following general formula (D) is preferable.

General formula (D) In the formula, R41 represents a hydrogen atom, a heron atom, or an alkyl group, and this alkyl group is a linear or branched carbon atom having 1 carbon number.
represents an alkyl group of ˜5 and may have an I substituent.

R4□ and R45 represent a hydrogen atom, an alkyl group, or an aryl group, but these groups may carry a substituent, and in the case of an alkyl group, an alkyl group substituted with an aryl group is preferable.

And at least one of R and R45 is a hydroxyl group, car?
an alkyl group or +cH2-i substituted with a water-based group such as a phosphoric acid group, a sulfonic acid group, an amine group, a sulfonamide group, etc.
0% R4s. This alkyl group may further have a substituent.

Note that R45 represents a hydrogen atom or an alkyl group, the alkyl group represents a linear or branched alkyl group having 1 to 5 carbon atoms, and p and q represent integers of 1 to 5.

Next, typical examples of the compound represented by the general formula (D) will be listed, but the invention is not limited thereto.

(Exemplary compounds) (D-2) H2 (D-3) N) I2 (D-4) (D-5) NI(2 (D-6) H2 (D-7) H2 (D-8) NI( 2 (D-9) H2 (D-10) H2 (D-11) (D-12) H2 (D-13) (D-14) NH2 (D-15) p represented by these general formulas (D) -7 Unilene diamine derivatives can be used as salts of organic acids and inorganic acids, such as hydrochloride, sulfate, phosphate, p-toluenesulfonate, sulfite, sheraate, benzenedisulfonate, etc. Can be used.

Among the above color developing agents, (D-1) is preferably used.

Puffer-based powders usually contain carbonate (
For example, potassium carbonate, sodium carbonate, etc.), borates (
For example, boric acid, sodium borate, potassium borate, etc.)
, phosphates (e.g. sodium phosphate, potassium phosphate, etc.), sulfites (e.g. sodium sulfite, potassium sulfite, etc.), chelating agents (preferably general formulas (1) to (X
A chelating agent represented by I), sodium hydroxide, potassium hydroxide, etc. can be contained.

Both values of the color developing solution prepared using the mixed processing agent for color development of the present invention are usually in the range of 8 to 14.

The mixed processing agent for color development of the present invention is color negative paper 74'
+-, color positive peno? - It is preferable to apply it to a processing agent for photographic paper such as color reversal paper. and/or its salt and water as its main components, compared to conventional color development formulation processing agents that contain a triazinylstilbene-based fluorescent brightener in a part whose main component is a poorly soluble solvent. Therefore, triazinylstilbene-based fluorescent brighteners are stable, and therefore their white background improvement effect is extremely unlikely to decrease even after long-term storage ().

Further, when both values of the color developing compound processing agent of the present invention are 7.0 or less, the white background improving effect is maintained even during long-term storage.

Furthermore, since the color developing processing agent of the present invention does not substantially contain a poorly soluble solvent, it is possible to treat the same phase uniformly as a liquid.
can be handled. Moreover, it is easy to handle, and the number of mixed processing agents for color development can be reduced by 17 or one point.

Example-1 The agent (A) of the present invention and the proportionate amount (B) of the present invention were used as a color development compounding treatment agent used in the preparation of a color developer for color paint.
The agent was adjusted.

1-, Compound processing agent for color development (A) Compound processing agent for color development of the present invention (B) Mixture processing agent for color development of the present invention (A) and (B) in 100 ml
Put 100 m of each into a polypin and place in a 60°C constant temperature bath for 30 m.
Stored for days. The residual amount of hydroxylamine after storage was determined by the hydroxamic acid method. The results (A) and (B)
The residual amount of hydroxylamine in both cases is 93q6, and agent (A), which combines hydroxylamine and triazinylstilbene-based fluorescent brightener, has a lower decomposition rate than agent (B), which does not contain hydroxylamine alone. Gender did not change at all.

Example-2 20 agents (A) of the present invention after storage in Example-1 and the following (
Add 40d of agent D) and 17mJ of agent (E) to 920'IfL of water.
Dissolve (A), (D), and (E) in this order in 1.0 i of potassium bromide! - and p)I with H2So4 and KOH 11. This was designated as color developing agent 1.

Mixed processing agent for color development (D) [Illustrative compound (D-1) sulfate 400IIP Mixed processing agent for color development (E) In addition, as a comparative example, Comparative Example (B) agent 20m/ml after storage of Example-1 The above (D) agent 4Qtrtl and (E) agent 17m
1 and 0.8 powder of Exemplified Compound (E-35), P and water 9
The solution was dissolved in 2-0 liters, 1.0 IP of potassium bromide was added, and the pH was adjusted to 11.0 with H2SO4 and KOH, and this was used as color developer I62.

Using Jal.2 color developer, KS was applied to Sakura Power Paper (manufactured by Konishiroku Photo Industry Co., Ltd.) as a photosensitive material.
After white stepwise exposure was applied using a Type-7 sensitometer (manufactured by Konishiroku Photo Industry Co., Ltd.), a color development process was performed according to the following steps.

Processing process Temperature ('C) Time (minutes) Color development 38 1 minute 30 seconds white fixation
38 Wash with water for 1 minute and 30 seconds 30
Dry for 1 minute 50-80°0 The bleach-fix solution used for 1 minute is Sakura Color Paper Processing Agent/Tie f-18A
(CPK-18A) (manufactured by Konishiroku Photo Industry Co., Ltd.) was used.

The concentration of the sample obtained using the color developer of 41 and &2,
The sensitivity and gamma values were all almost the same), and the unexposed white background was also the same.

That is, when the mixed color developing agent (A) of the present invention is used, there is no change in performance compared to the comparative color developing solution A2, and when the coloring agent is used as the conventional color developing agent (B), (C), (D), From the four analogies of photobrightener powder (A), (B), (
C) can be made into three parts, and there is no need to handle the fluorescent brightener as a powder, which is very preferable.

Example 3 A case is shown in which benzyl alcohol, which is an example of a poorly soluble solvent, is used as a development accelerator.

For comparison, the following mixed processing agent for color development (F) was prepared.

Mixed processing agent for color development (F) Next, the fluorescent whitening agent (E-22) was removed from the above (F) (
G) was created, and the following (H) was created.

Preparation for color development (H) Preparation processing agent for color development (F), (G) and (H) at 100%
100 m6 of each was placed in an AT polybottle and stored in a constant temperature bath at 60°C for 30 days. (F), (G) and (H) above
Using (A), (B), and (C) of Example-1, color developing solutions &3 and A4 were prepared as shown below.

Color development processing 3 Color development processing 4 Development processing was performed in the same manner as in Example-1 using color development processing 3 and 4. When the 440 nm reflection density of the unexposed white background was measured using a Hitachi spectrophotometer (manufactured by Hitachi, Ltd.), it was 0.105 using Flat 3, while it was 0 when using Flat 4. The reflection density of No. 4 of the present invention was 0.099, which was low, and it appeared white even when visually observed, which was a favorable result. Furthermore, after saving and newly created (F) and (
H) was diluted to the same fluorescent brightener concentration and its ultraviolet absorption (340 nm) was measured.

The results are shown in the table above, and the decomposition of the fluorescent whitening agent (H) of the present invention was small and extremely favorable.

Example-4 Fluorescent brightener (E-35) in Example-1 was replaced with K (E-1
6), (E-23), (E-24), (E
-32) and (E-36), similar results were obtained.

Example-5 Each of the chelating agents (5), (52), (88), and (93) was added to the mixed processing agent (E) for color development of Example-1 in an amount of 11 parts and 20 parts. The same experiment as in Example-1 was conducted.

As a result, the remaining amount of hydroxylamine is reduced by the chelating agent (
5) is 95ch, (52) is 96%, (88) and (9
3) was 97%. It turns out that the addition of a chelating agent is preferred in the present invention.

Example-6 5 grams of chelating agent (88) was added to the color development preparation processing agent (H) of Example-2, and the voice values were 4.0 and 5.5.

The same experiment as in Example 2 was carried out using color developing solution A4, with the developer being changed to 7.0, 8.5.12. As a result, it was found that a white background is preferable when the pH is -7.0 or less, compared to pH 8.5 and -12, and the decomposition of the fluorescent whitening agent is also small.

Example-7 In Example-2, (G) and (H) were mixed at a ratio of 3:20. As a result, two layers were separated, and when the mixture was moved, it became one layer of cloudy particles, but this was undesirable because it was difficult to dispense. or,
After being stored in a constant temperature bath at 60° C. for 30 days, it was developed in the same manner as in Example 2, and the white background was inferior to that obtained when (G) and (H) were packaged separately.

Patent applicant: Konishiroku Photo Industry Co., Ltd. TEKb”L +
+Ir, TJ'-', :,! =j' (Gani 0 Showa 6
1st May 16 rl 111'-Person 1

Claims (4)

[Claims] (1) A compound processing agent for color development characterized by containing a triazinylstilbene type fluorescent whitening agent, hydroxylamine and/or its salt, and water as main constituents. (2) The mixed processing agent for color development according to claim 1, wherein the pH value of the mixed processing agent for color development is 7.0 or less. (3) The compound processing agent for color development is a poorly soluble solvent (log
3. The compound processing agent for color development according to claim 1 or 2, characterized in that it does not substantially contain a solvent having P of 0.4 or more. (4) The content of triazinylstilbene-based fluorescent whitening agent is in the range of 1 g to 300 g per 1 liter of the mixed processing agent for color development, and the content of hydroxylamine and its salts is in the range of 20 g to 300 g.
4. A compounded processing agent for color development according to claims 1 to 3, characterized in that the amount is in the range of 600 g to 600 g.