DE2062031B2 - DEVELOPMENT PROCESS FOR COLOR PHOTOGRAPHIC MATERIALS WITH MULTIPLE LIGHT SENSITIVE SILVER HALOGENIDE LAYERS AT A TEMPERATURE THAT LIES ABOVE 30 DEGREES C. - Google Patents

Description

CR ₁

ρ '^{; /} C. \ //
C. N R ₁ ρ _Λ N Rj N

The invention relates to a process for the development of multilayer color photographic materials at a temperature which is above 30 C ^c.

Multi-layer color photographic materials generally have at least three superimposed Silver halide emulsion layers with different spectral sensitivities on one Support, for example a red-sensitive emulsion layer, a green-sensitive emulsion layer, a yellow filter layer and a blue-sensitive emulsion layer applied to the support in that order are raised.

It is known to speed up the photographic Develop higher temperatures to apply.

This is commonly referred to as "high temperature rapid development". One of the glitches in the high-temperature rapid development of multi-layer color materials, the appearance that the top layer is excessively developed before the lower layers are fully developed are.

It is known that / ur overcomes this disadvantage a development inhibitor is added to the developing solution. However, if the previously added Development inhibitors, such as (v nitro-iso-

SH

wherein R ₁ and R ₂ , which are the same or different, each represent a hydrogen atom, an alkyl group. an aralkyl group, an aryl group or a haloaryl group and R _{3 represents} a hydrogen atom, a halogen atom or an alkyl group.

2. The method according to claim 1, characterized in that the mercapto compound in one Developer solution, pre-hardening solution or neutralizing solution is applied.

3. The method according to claim 1 or 2, characterized in that the development at a Temperature above 35 C takes place.

40 indazole compounds are added to the developing solution, not only the development of the uppermost layer but also that of the lower emulsion layers is inhibited.

To avoid this error, the addition of an Acylamir.ophenylmercaptotetrazolverbindungen to the Developer solution or the photographic emulsion layer known as the development of the topmost Layer is selectively inhibited by this compound and the balance of the overall development is improved U.S. Patent 32 95 976 ^.

However, the mercaptotetrazole compound described therein is difficult to prepare because it is the starting material for this compound consists of thiophosgene, which is difficult to access.

The object of the invention is for the development of color photographic recording materials with several light-sensitive silver halide emulsion layers at temperatures above 30 ° C to find an easy-to-establish connection, if used during the initial development an overdevelopment of the color photographic recording materials is prevented.

The task is solved with a development process Pure color photographic materials with several light-sensitive silver halide layers at a temperature above 30 C, in the presence of a heterocyclic, nitrogen-containing Mercapto compound. the mercapto compound being present during initial development must be, if the development process has several development stages, is characterized by that a mercapto compound of the general formula

R,

R, -C

C - R,

SH

wherein R ₁ and R ₂ , which may be the same or different, each represent a hydrogen atom, an alkyl group. an aralkyl group, an aryl group or a haloaryl group and R _{3 is} a hydrogen atom, a halogen atom or an alkyl group, but

50 is turned.

According to the invention, by adding such a mercaptotelraazainden compound to the Developer solution or to the bath preceding the development, for example the pre-hardening bath or neutralizing bath, possible, selectively developing the top layer of a multilayer color photographic Inhibit material and prevent the top layer from developing excessively so that the overall color balance and image quality are improved. According to the invention The mercaplotetraazaine compound used can be easily established.

Pre-hardening baths, i. E. H. aqueous Solutions containing an aldehyde to harden the gelatin of the photographic emulsion layer, such as formaldehyde, Glyoxal. Succinaldehyde and glutaraldehyde are used. The aqueous solution contains

also a salt, such as sodium sulfate, a buffering agent, such as borax, boric acid, acetic acid. Sodium acetate, sodium hydroxide and sulfuric acid and other antifoggants for development, such as alkali halides. The development inhibitor to be used in the present invention may result in such aqueous pre-hardening solution can be added.

If a neutralization bath to prevent the aldehyde from discharging from the pre-hardening ^ bad is used in the developer solution, the, o The development inhibitor to be used according to the invention can be added to the neutralization bath. The neutralization bath contains an aldehyde scavenger, for example hydroxylamine or L-ascorbic acid and can further use a salt and a buffering agent contain.

The black and white developing solution for color reversal photographic films contains at least a developing agent such as hydroquinone, 1-phenyl-3-pyrazolidone and N-methyl-p-aminophenol. The development solution also contains a salt such as sodium sulfate, a buffering agent such as borax, boric acid, Sodium hydroxide and sodium carbonate and an alkali halide. The development inhibitor can also screened for this black and white developer solution will.

The color developing solution for color negative films or color papers is usually alkaline, aqueous Used solutions containing a p-phenylenediamine derivative as a color developing agent, for example N.N - diethyl - 3 - methyl - ρ - phenylenediamine hydrochloride. 4 - amino - 3 - methyl - N - ethyl - methanesulfoamidoethylaniline sulfate, 4-amino-3-methyl-N-ethyl-N - hydroxyethylaniline sulfate. N - ethyl -N- hydroxyethyl - ρ - phenylene - diamine sulfate and similar compounds. The solution also contains a salt, such as sodium sulfate, a buffering agent. such as sodium hydroxide, sodium carbonate and sodium phosphate and ordinary antifoggants such as alkali halides. The development inhibitor according to the Invention can also be added to the color developing solution.

The object of the invention is achieved by adding one of the treatment solutions listed above a mercaptotetraazaindene compound corresponding to the general formula Compound 1: 1.3.3a.7-tetraazainden-4-thiol

HC

HC

CH

SH

Compound 2: 4-thiol

6 - Ivlethvl -1.3,3 a.7 - tetraazainden-

H, C-C HC

CH

SH

Connection uni; 3: 6-tert-dutyl-4-thiol

, 3.3a, 7-telra; i / ainden-

t-CJl, - C HC

CH

SH

Compound 4: 4-thiol

ό- Ocntyl -1,3,3a, 7- tetraazainden-

R ₁ -C

N N ^

i
N

C-R,

55

SH

wherein R ₁ and R ₂ , which can be the same or different, each represent a hydrogen atom. an alkyl group. an aralkyl group, an aryl group or a haloaryl group and R _{3 is} a hydrogen atom. represents a halogen atom or an alkyl group.

Typical examples of compounds which can be used according to the invention and correspond to the above formula are given below, although the invention is not limited thereto.

HC ₅ H ₁ , - C C. C.
I. N HC SH N \ on \ l 3 a N N Connection 5
4-thiol : 6- - 1.3. n-CH ,, , - -C C. C. N HC SH N

CH

cn

Compound 6: 6-Undecyl- U ^ aJ-tetraazaindene- Compound 11: 5-Ethyl-6-methyl- 1.3.3a.7-tetra-

hiol azainden-4-thiol

CH

/ - « N / C. \ // N j \ N \ \
\ N CH 5 H, C - N I. N / N \ N j i C. N ^ \ N HC Sh j J H ₅ C ₂ - nC ,, H ₂ , N , / / \ <■ / N • neth C. IO C. .1 - tetraaza- vl-6-r N - 1.3.3 a Connection 12: SH 6 - Heptadecvl 15th azainden-4-thiol Connection 7: ·. J ien-4-thiol C. N HC - N i CH / ^x t
N / ^ 20th JSO-H ₄ C ₄ - i n-C, -H, s HC C. 25th j SH -C -C C. I.
C.

CH

SH

The compounds of the above general formulas can generally by reacting a Aminotriazole with an acyl acetic acid ester, at compound 8: 6 - phenyl -1.3,3 a.7 - tctraazainden- 30 closing reaction of the product with phosphorothiol oxychloride and after extraction of the extract

be made with thiourea.

H, C,

HC

N '

CH

SH

35

40

Compound 9: S-bromo-O-methyl-U 3a.7-tctraazaiden-4-thiol

H., C - C

Br - C

CH

SH

Connection K):
iiden-4-thiol

H, C - C

HC

2.6-dimethyl -1.3.3 a.7 - tetraaza-

60

C --CH.,

SH

Example of manufacture
(Connection 3)

Aminotriazole and an equimolar amount of 4,4-dimethyl-3-oxovaleriacidäthylester were heated for 7 hours in glacial acetic acid and after recrystallization of the crystals obtained from methanol, the 4 - hydroxy - 6 - tert. - butyl -1,3,3a, 7 - tetraazamden with a melting point of 269 ^r C obtained. After the tetraazaindene had reacted with phosphorus oxychloride for one hour at 120 ° C., the product was poured into ice water and then extracted with methyl chloride. The crystals of the 4-chloro compound obtained were reacted with thiourea in ethanol and the crystals formed were recrystallized from alcohol, whereby pointed, needle-like crystals of 6-tert-butyl-1,3,3a.7-tetraazaiden with a melting point of 286 ° C. were obtained became.

The other compounds can also be prepared by the method of the British patent 8 93 428.

In British patent 8 93 428 it is described that by adding a compound accordingly of the general formula for silver halide, the storage stability of the silver halide is improved during storage and the thermal stability of the silver image obtained is increased. However, the application of the compounds according to the invention is fundamentally different from the Teachings of British Patent Specification. In the case of exposure of a color photographic, photosensitive Material of high temperature development often occurs. that the top layer of the same is excessively developed and a change in color balance occurs. In

this case may occur in the high temperature development obtained an image with improved color balance in the presence of the compounds according to the invention without the errors occurring. The high temperature development Thus, color photographic photosensitive materials cannot be effectively carried out in practice unless that of the present invention Procedure is applied. By each of the above-listed compounds of the general formula can be the excessive development of the surface layer or the top emulsion layer can be prevented and an effective development treatment with good color balance can be obtained. However, of these compounds, compound 3 gives the best results.

The amount of the compounds to be used according to the invention varies according to the type of compound, the kind of color photographic material and the kind of composition of the processing solution. In general, however, the amount is of the compound 1 mg to 1 g per liter of the treatment solution.

example 1

A multi-layer color reversal film made up of three Silver halide emulsion layers with different couplers and different spectral Sensitivities were measured using a sensitometer exposed and then the solvent treatments subject to:

treatment

lcmpcra- / cn
lur

Black and white development 37 C

First fixation 37 C

Soak at 37 C

Color development 37 C

Second fixation

Watering

Pale tan

Fixation
Watering «

37 · -C
37 C

37'-C

37 C
37 C

3 minutes

30 seconds

1 minute

3 minutes

and

30 seconds

30 seconds

1 minute

1 minute

and

30 seconds

1 minute

1 minute

The compositions of the above. Treatments used were treatment solutions the following:

First and second solution

Acetic acid. . .
Sodium acetate
Water too. . .

Color development solution

Sodium hexametaphosphate

Benzyl alcohol

Sodium sulfate

Sodium phosphate

Potassium bromide

Potassium iodide (0.1% aqueous solution)

Sodium hydroxide

4-Amino-3-methyl-N-ethyl-N-methanesulfonamidoethylanilinesulfal

Ethylenediamine

Water too

25 ecm

liter

Lie

6.0 ecm

5.0 g 40.0 g

0.2 g 10.0 ecm

6.5 g

10.0 g 8.0 ecm I liter

Bleach solution

Ferricyanide. . .
Potassium bromide
Water to ...

100 g 30.0 u 1 liter

Fixing solution

Sodium thiosulfate 150 g

Sodium sulfite 10 g

Water too

1 liter

In the above reversal development treatment, the compound of the invention became added to the black and white developer solution. For comparison purposes, the same procedure was used below Application of the black and white developer solution. which is a well known common anti-fogging agent. 6-nitro-isoindazole instead of the compounds according to the invention, used.

Trial addition / / ur black and white number Eniwicklcrlosun ^

without

Connection 1

Connection 3
6-nitroisoindazole
6-nitroisoindazole

Amount of addition

2.0-10 2.0 · 10 " ⁵ MoI 1 2.0 · 10" ⁵ MoI 1 5.0 · ΙΟ " ⁴ Mol 1

The results obtained are summarized in the following table, in which the blue sensitivity (D _B _ _max ) and the red sensitivity (D _R _ " _ÜI | of the unexposed parts of test strips (parts with maximum density) and the sensitivities for the red and blue Exposures are listed to show the photographic effect.

Black and white developing solution . .. LOg number 6o I. • I The Maximum Tue Sensitivity * l Sodium hexa-metaphosphate. . 0.3 o -ι l · m pt ι mi lic Bl.iudichtc blue Rni 1 - Phfn vl-3-nvrnzolidon 3 50.0 a 2.4 175 Nntriiimsulfii ... . . . 6.0! 2 6S ⁴ 3.4 100 115 Hvdroquinone . . . 35.0 c 3.5 99 100 Sodium carbonate (monohydrate) . . 2.0 c 9S Potassium bromide . . . ! .Og 2.5 150 Potassium thiocyanate 3.7 70 105 Potassium iodide (Ο.Γ'-nige aqueous . .. 10 ecm f- mpliniiln.hki.Mi 72 Solution) I liter hkcu ti er \ ltmi .. i \ heslimml. by di Water too right HKi anueriMTimen « Red density .Ii nii 3.4 3.5 3.6 3.4 3.7 uurdc rcI.il h ^ pn'hc 2, ti ¹ -

9 10

As can be seen from the table above, potassium bromide becomes 2.0 μ

with addition / the compound to be used according to the invention sodium hydroxide 0.1 g

a good image quality with a sufficient- Formalin (37%) 15.1) ecu

correspondingly high blue density and a good balance of water to 1 liter

the blue density and the reddich ··. · received without 5 .. ,,, ,,, · ,, ■,,,

the sensitivity has been reduced. On the other hand ^{l: rstc} Schwarz-WciU-l-.nlwicklerlosunj:

was 5.0 g in the experiment using N-methyl-p-aminophenol

6-nitro-iso-indazole instead of the sodium sulfate according to the invention 70.0 g

applicable compounds found that by hydroquinone 2.0 g

the well-known development inhibitor the development 10 sodium carbonate (monohydrate) .. 4! .Og

treatment of the top layer as well as the lower splint- potassium bromide 4.0 g

ten were inhibited. On the other hand, in the case of potassium thiocyanate, 1.6 g

Application of the potassium iodide to be used according to the invention (0.1 "aqueous

Compounds an excessive development of the upper solution i 0.0 car

During the high temperature development, the first layer produces 1 liter of water

prevents development with a good balance

carried out and no reduction in sensitivity; cyan color developer dissolves;

chance occurred, as can be seen from the above Ta- potassium bromide M) "

^{bellc er} - ^ibt · _2o 6-nitrobenzimidazole ". '.'. '.'. '.'. '.'. '. Υ. (Υο.ίμ

B is ρ ie 1 2 ² ° Potassium iodide

A fcrbphmo ^ phi ^, Mohrschich ,,,, ™. do, _N ffiÄ ?. "? ^1. """ Τ. .- Z Γ

by coating a cellulose triacetate film with _M , ■ _lr ,, «,>"

c Ji- L / ~ 1. · C-1L ■ ju j Sodium Sulphate 60.0 n

a roll-sensitive gelatin silver iodobromide ,,, ■ ■■ ' ,,. -

, -. . i_- u. ■ ·· c AV u r- 1 ■ Potassium thiocvanate. 1.0 ü

Emulsion layer, a green sensitive gelatin 25 . . . , -,. .. ..,,

Silver iodobromide emulsion layer. a colloidal 4-ammo 3-methyl-N-ethyl-N-hy-

Syllable / containing gelatin yellow filter layer with Natriu ^ 'hd -Γ T ^

Blue absorption and a blue sensitive gela-, t n-il ⁷¹ ^^ ^X ° ^ c j-'ü ^ "^

line-silver iodobromide emulsion layer on top of one another-!, i-dihydroxy-zo-dibromo-

was made in foil. was made by means of a 30 .. ^dp , ^{a In} . , ''', Γ. -

Sensitometers exposed and then the folcendcn Be Monobcnzyl-p-aminophcnoi 0.4 u

subject to handluneen. 'p-aminophenol hydrochloride 0.1 g

1 liter of water

Method Tem- / en yellow color development

pera'.ur ^3S sodium sulfite 10.0 g

Potassium bromide 0.5 g

Pre-hardening «! 40 C 30 sec. ^K ^ r ° ^d ' ^d "

..... - . _nn -jnci (0.1% aqueous solution) 25.0 cm

^VVasserun ^ ^{40 C 30 sec} · 6-nitrobenzimidazole ... Λ 0.1 a

First black and white development 40 C 7 :? Sec. ⁴ ° sodium sulfate 60On

Soaking 40 C 30 sec. N, N-diethy] -p-phenylenediamine-

^{Reverse exposure} (red light) 200 CMS sulfite 2.5 g

from the back of the film sodium hydroxide 2.5 g

Cvan color Entwicklunc 40 C 180 sec 45 '' -. ^Be nzyl-4- (p-toluolsulfoamido) -

W-eru " _g * 40 C» S *. "Ξΐί". ÜL

Reverse exposure (blue light) 200 CMS.

from the front of the film Second black and white developer solution

Yellow color wrap 40 C 90 sec. _Q ^N -Methyl-p ~ aminophenol sulfate ... 1.0 g

Soaking at 40 C for 30 seconds "Sodium sulfite 50.0 g

Second black and white de- 40 C 15 sec. Hydroquinone 1.0 g

wicklun "sodium carbonate (monohydrate).. 41.0g

.. ^ i-u 11 -in / - nnc 1 Potassium bromide "2 5 si

Magenta color development 40 C 120 sec. Water to MV

Soaking 40 C 60 sec. ⁵⁵

Bleach 40 C 60 sec. Magenta color developing solution

Fixation ⁴⁰ C 60 sec. Sodium sulfite 5.0 g

Soaking at 40 C for 60 sec. Potassium bromide 1.0 e.

60 potassium thiocyanate i .0 «

The composition of the above hand- sodium sulfate 60.0 "ii

Solution solutions were as follows: N.N-diethyl-3-methyl-p-phenylene-

Hänun ^ slösun, diamine hydrochloride 2.5 g

Sodium hydroxide 2.0 si

Sodium hexameiaphosphate 1.0g 65 l-Phcnyl-3- (m-nitrobenzoylamino) -

Natnumpyrosulfite 5.0 g 5-pyrazolone! 4 g

Sodium pyro phosphate 15.0g ethylenediamine 8 0 ecm

Sodium sulphate 150.0 g water to 11 it.-r

9 20

Bleach solution

Ferric yanide 100 g

Potassium bromide 30.0 g

Water to 1 liter

Fixing solution

Sodium thiosulfate 150 g

Sodium sulfite 10 g

1 liter of water

In the above reverse development, the following compounds of the present invention were shown in FIG Pre-hardening solution added.

031

Trial number

Addition to the Vorharlungsliisinig

without

Connection 2
Connection 4
Connection 5
Connection 6

Amount added

5.0-10 " ⁵ MoI 1 5.0 · 10 ⁵ MoI 1 5.0 · 10" ⁵ MoI 1 5.0-10 " ⁵ MoI 1

The photographic properties obtained on processing are shown in the following table. The blue density (D _B _ _im J and the red density W _K “ _max ) of the unexposed parts of the strip (parts with maximum density) are given as photographic properties. The blue density is the density of the uppermost blue-sensitive emulsion layer of the film which gives the yellow color upon color development, and the red density is the density of the lowermost red-sensitive emulsion layer which gives the cyan color. If the values are large and do not differ greatly from one another, this means a good color balance and an image with good color rendering.

Attempt number

Blue density
2.3

3.6 3.6 3.3

3.2

Red density

3.5

3.5 3.6 3.6

3.5

As can be seen from the table, the blue density increases when the compounds according to the invention are added to. without reducing the red density.

Example 3

In the development treatment according to Example 2, the compounds to be used according to the invention were the first black and white developer solution added, but not added to the pre-hardening solution.

* crsuch · .- Addition to the first Schuarz Added H) ^ ⁵ lot nummcr White developing solution 10 " 1 without 10 ' ■ ϊ Connection 7 20- 10 ' ⁵ Mole I. 3 Connection 8 20 · Mole 1 4th Connection 10 20 · Mole 1 S. Connection 11 20 · Mole 1

The photographic properties obtained in the experiments after development are as follows Table given. Blue density and Roidichie are listed as photographic properties.

Search number

Blue density
2.3

3.5 3.6 3.7 3.6

Red density c

3.5 3.7 3.6 3.6 3.6

As can be seen from the table, when the compounds according to the invention are added, the blue dichia becomes increased without reducing the red density.

Example 4

A multilayer type color photographic film composed of three layers of silver halide emulsion with different couplers (cyan, yellow and magenta) and different spectral sensitivities against each other were exposed with a sensitometer and then the following treatment subject to:

procedure

temperature

Time

Color development 35 C 3 minutes

Stop 35 C 30 seconds

Soaking at 35 C for 30 seconds

Blcichung 35 C 1 minute

Fixation 35 C 90 seconds

Soaking at 35 C for 1 minute

The compositions of the treatment solutions were as follows:

Color developing solution

Sodium hexametaphosphate 1.0 g

Benzyl alcohol 5.0 g

Sodium sulfite 3.0 g

Sodium carbonate 41.0 g

Sodium hydroxide 1.0 g

4-amino-3-methyl-N-ethyl-N-me-

thanesulfonamidethylaniline sulfate. 5.0 g

Potassium bromide 0.5 g

1 liter of water

Stop bath

Acetic acid 25 ecm

Sodium acetate 3 g

Potassium alum 10 g

1 liter of water

Bleach solution

Ferric yanide 100 g

Potassium bromide 20.0 g

1 liter of water

Fixing solution

Sodium thiosulfate 150 g

Sodium sulfite 10 g

1 liter of water

In the case of the negative color development, the compound 3 according to the invention was added to the color developing solution in an amount of 5 × 10 ^s mol-1. When the results obtained were compared with those in the case of no addition of the compound, it was found that when the compound to be used in the present invention was added, the uppermost blue-sensitive emulsion layer was not excessively developed and good color balance between the red, green and blue densities was obtained during development .

Example 5

In the resizing treatment according to Example 1, there were a pre-hardening stage and a neutralizing stage executed before the first black and white development. The pre-hardening treatment was carried out during 2 minutes and 30 seconds at 37 ° C, and the neutralization procedure was carried out at 37 ° C. for 30 seconds. The compositions of the Treatment solutions were as follows:

Pre-hardening solution

Formalin (37% aqueous solution) 20 ecm

2.5-dimethoxytetrahydrofuran .... 4 ecm

Sulfuric acid 2 ecm

Sodium sulfate 100 g

Potassium bromide 2 g

Borax 5 g

Water 1 to 1 liter

Neutralizing solution

Hydroxylamine sulfate 20 g

Potassium bromide 20 g

Glacial acetic acid 10 ecm

Sodium sulfate 50 g

Sodium hydroxide 6 g

1 liter of water

In the above reverse color development, the compounds of the present invention became the Neutralization solution added, as shown in the following table:

Trial / use / for neutralization: «- / ugcscl / te amount ! Heaven Insunu

1 without 20- 10 ⁵ MoI T Connection 1 20 · 10 ' ⁵ MoI 3 Connection 2 20th 10 'Mol 4th Connection 5

The results obtained are shown in the following table, taking as photographic properties the blue density and the red density are given as maximum density and also the reversal sensitivity.

Yersuehs- • l The I Maximum density Roidensity Umkchrdiihii Ί Roldi ' nummcr 3.4 115 Blue density Xb Blue density 100 1 2.4 3.7 175 99 T 3.5 ^ 6 100 105 3 3.7 'Reversibility is al 99 Is relative emptindlu 4th 3.5 102 .here : hkeil

indicated, whereby the LmpiuiJlichkui del Vcisuchnummer 2 / u HX) was accepted.

As can be seen from the above 1 table he; jibt. wire by adding the compound according to the invention is used, the blue density is greatly increased without any influence on the sensitivity del remaining silver halide emulsion layers takes place and an image with better color balance of blue and red is obtained.

Example 6

A red-sensitive gelatin-silver iodobromide emulsion with a phenolic cyan coupler and further applied an intermediate gelatin layer. Then became a green-sensitive gelatine-silver bromide emulsion with a pyrazolone magenta coupler on the intermediate layer applied and further formed a yellow filter layer on this layer. Then became a blue-sensitive gelatin silver iodobromide emulsion with a ketomethylene yellow coupler on the filter layer applied and finally a protective layer of gclatin on the blue-sensitive emulsion layer educated.

Two kinds of the above color photographic film were produced. One served as a control sample. and no compound of the invention was contained in any emulsion layer of the film, while in the samples according to the invention 0.5 g Ag-mol of the compound 3 according to the invention in the blue-sensitive emulsion layer of the photographic film.

The produced color photographic film was exposed to light by means of a scanner and subjected to color reversal development subjected to the procedure of test 1 according to example 1. The results are contained in the following table:

cn Maximum density Reversal sensation
opportunity * I Red
density Blue-
density Red
density blue
density 106
100 Comparison sample
55 In accordance with the invention 2.3
3.5 3.3
3.5 145
100

The reverse sensitivity is as a relative sensitivity indicated, with those obtained with the sample according to the invention Sensitivity to KK) has been set.

As can be seen from the table above, i should be used in the case of adding the according to the invention When the connection is made, the blue density is sufficient, even in the case of high-temperature development, and it becomes a picture with better color balance of the blue and red densities.

Claims (1)

Paienian requirement: 1. Development method for color photographic materials having multiple light-sensitive materials Silver halide layers at a temperature above 30 C, in the presence of a heterocyclic, nitrogen-containing mercapto compound, the mercapto compound during initial development must be present if the development process has several development stages, characterized in that a mercapto compound of the general formula