US3839046A - Process for the production of a photographic print - Google Patents
Process for the production of a photographic print Download PDFInfo
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- US3839046A US3839046A US00297085A US29708572A US3839046A US 3839046 A US3839046 A US 3839046A US 00297085 A US00297085 A US 00297085A US 29708572 A US29708572 A US 29708572A US 3839046 A US3839046 A US 3839046A
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- 238000000034 method Methods 0.000 title claims description 25
- 238000004519 manufacturing process Methods 0.000 title description 6
- -1 3-pyrazolidone compound Chemical class 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 36
- 229910052709 silver Inorganic materials 0.000 claims description 16
- 239000004332 silver Substances 0.000 claims description 16
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 6
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 5
- 239000012964 benzotriazole Substances 0.000 claims description 5
- KRTDQDCPEZRVGC-UHFFFAOYSA-N 2-nitro-1h-benzimidazole Chemical compound C1=CC=C2NC([N+](=O)[O-])=NC2=C1 KRTDQDCPEZRVGC-UHFFFAOYSA-N 0.000 claims description 4
- OWIRCRREDNEXTA-UHFFFAOYSA-N 3-nitro-1h-indazole Chemical compound C1=CC=C2C([N+](=O)[O-])=NNC2=C1 OWIRCRREDNEXTA-UHFFFAOYSA-N 0.000 claims description 4
- NDGRWYRVNANFNB-UHFFFAOYSA-N pyrazolidin-3-one Chemical compound O=C1CCNN1 NDGRWYRVNANFNB-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- GGZHVNZHFYCSEV-UHFFFAOYSA-N 1-Phenyl-5-mercaptotetrazole Chemical compound SC1=NN=NN1C1=CC=CC=C1 GGZHVNZHFYCSEV-UHFFFAOYSA-N 0.000 claims description 2
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims description 2
- CMCWWLVWPDLCRM-UHFFFAOYSA-N phenidone Chemical group N1C(=O)CCN1C1=CC=CC=C1 CMCWWLVWPDLCRM-UHFFFAOYSA-N 0.000 claims description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 abstract description 16
- 239000000243 solution Substances 0.000 description 23
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 8
- 230000006698 induction Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- JAAIPIWKKXCNOC-UHFFFAOYSA-N 1h-tetrazol-1-ium-5-thiolate Chemical class SC1=NN=NN1 JAAIPIWKKXCNOC-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 4
- 235000010265 sodium sulphite Nutrition 0.000 description 4
- 150000005208 1,4-dihydroxybenzenes Chemical class 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- ITOXSIXYCZOWLP-UHFFFAOYSA-L dipotassium;benzene-1,4-diol;carbonate Chemical compound [K+].[K+].[O-]C([O-])=O.OC1=CC=C(O)C=C1 ITOXSIXYCZOWLP-UHFFFAOYSA-L 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- CNHDIAIOKMXOLK-UHFFFAOYSA-N toluquinol Chemical compound CC1=CC(O)=CC=C1O CNHDIAIOKMXOLK-UHFFFAOYSA-N 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- LRUDIIUSNGCQKF-UHFFFAOYSA-N 5-methyl-1H-benzotriazole Chemical compound C1=C(C)C=CC2=NNN=C21 LRUDIIUSNGCQKF-UHFFFAOYSA-N 0.000 description 1
- WSGURAYTCUVDQL-UHFFFAOYSA-N 5-nitro-1h-indazole Chemical compound [O-][N+](=O)C1=CC=C2NN=CC2=C1 WSGURAYTCUVDQL-UHFFFAOYSA-N 0.000 description 1
- XPAZGLFMMUODDK-UHFFFAOYSA-N 6-nitro-1h-benzimidazole Chemical compound [O-][N+](=O)C1=CC=C2N=CNC2=C1 XPAZGLFMMUODDK-UHFFFAOYSA-N 0.000 description 1
- ORZRMRUXSPNQQL-UHFFFAOYSA-N 6-nitro-1h-indazole Chemical compound [O-][N+](=O)C1=CC=C2C=NNC2=C1 ORZRMRUXSPNQQL-UHFFFAOYSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 150000001565 benzotriazoles Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- AJPXTSMULZANCB-UHFFFAOYSA-N chlorohydroquinone Chemical compound OC1=CC=C(O)C(Cl)=C1 AJPXTSMULZANCB-UHFFFAOYSA-N 0.000 description 1
- 235000008504 concentrate Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- ZCVPZHDBQMQLRK-UHFFFAOYSA-L disodium boric acid dihydroxide Chemical compound [OH-].[Na+].[Na+].B(O)(O)O.[OH-] ZCVPZHDBQMQLRK-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N hydroquinone methyl ether Natural products COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 235000014666 liquid concentrate Nutrition 0.000 description 1
- 239000000837 restrainer Substances 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/30—Developers
Definitions
- ABSTRACT This invention relates to the rapid processing of photographic material. The development takes place in a solution which contains a 3-pyrazol1d0ne compound,
- Photographic developing solutions have an appreciable induction period, that is to say to seconds elapse before any image appears on the print material after it has been immersed in the developing solution. As soon as the image starts to appear it develops very rapidly so that within 1 or 2 seconds after its first appearance the operator would be able to tell ifthe exposure time were correct and thus if the print is able to be used. This has the advantages of reducing the time wasted if the print is incorrectly exposed and of reducing the overall development time when correctly exposed.
- a process for the production of a photographic print using polyethylene laminated photographic material of the silver halide emulsion type which comprises the sequential steps of imagewise exposing the material, developing the latent silver image, fixing out the unexposed silver halide, washing the fixed material and drying the material there is provided the step of developing the exposed photographic material in a silver halide developer solution which comprises from 0.5 to 2 g per litre of a 3-pyrazolidone compound of the general formula.
- the preferred 3-pyrazolidone is 1-phenyl-3- pyrazolidone.
- suitable substituted hydroquinones are chloro-hydroquinone and methyl hydroquinone.
- any of the usual development anti-foggants may be used. However they must be present at an appreciably higher concentration in the developer solution than the concentration present in most normal developing solutions.
- mercapto-tetrazole compounds which are well-known as development antifoggants may be used.
- concentration of these compounds in the developer solution is within the range of 0.01 to 0.1 g/litre.
- the preferred mercapto-tetrazole for use in the invention is phenyl mercapto-tetrazole 7
- Other w eTl-liiiown development antifoggant compounds which may be used are nitrobenzimidazoles, for example 5-nitrobenzimidazole, nitroindazoles, for example 6-nitroindazole and 5-nitroindazole, benzotriazole and derivatives of benzotriazole for example 5- methylbenzotriazole.
- concentration of these compounds in the developer solution is within the range of 0.05 to 0.5 g/litre.
- the pH of the developer solution of use in the present invention is preferably 10.6, but can be within the range 10.0 to 11.5.
- the developer solution of use in the present invention may contain in addition the normal constituents of developing solutions, e.g., sequestering agents, potassium bromide as a restrainer, antioxidants such as sodium sulphite.
- Water-miscible solvents e.g. ethylene glycol monomethyl ether, to help dissolve the l-phenyl- 3-pyrazolidone, may be present when the developer is compounded as liquid concentrate and is to be diluted 1 part plus 9 parts water for use. Concentrates for dilution in the range 5 fold to 20 fold may also be prepared.
- 3-Pyrazolidone compounds of the formula hereinbefore set forth and in particular l-phenyl-3-pyrazolidone have found great use as photographic developing agents. However they are normally used in small amounts, e.g. from 0.05 to 0.2 grams per litre, together with relatively greater amounts of hydroquinone, e.g.
- synergistic developing solutions of this type are used the induction period of print photographic material developed therein is about 20 seconds.
- polyethylene laminated photographic material is developed in the developing solution of the present invention the induction period is reduced virtually to nothing. This is both unexpected and very useful since it reduces very considerably the pe riod required for the operator to have to wait in order to visually examine the photographic material in the developing solution while the image is developing. Further the process of the present invention enables the development time required in the processing of each polyethylene laminated photographic print to be reduced by between 20 seconds and 1 minute.
- a process for the production of a photographic print using polyethylene laminated photographic material having coated thereon at least one silver halide emulsion layer which process comprises the sequential steps of imagewise exposing the material, developing the latent silver image, fixing out the unexposed silver halide, washing the fixed material and drying the material
- the improvement which comprises developing the exposed photographic material in a silver halide developer solution which comprises from 0.5 to 2 g per litre of a 3-pyrazolidone compound of the formula wherein R is a hydrogen atom or a methyl group and R is a hydrogen atom or an alkyl or alkoxy group containing from one to four carbon atoms, together with a hydroquinone developing agent, the ratio by weight of the hydroquinone developing agent to the 3- pyrazolidinone compound being from 3 l to 5 1 and there being present in the silver halide developing solution sufficient development antifoggant to prevent a properly exposed print from being fogged, the development anti-foggant being selected from the group consisting of a mer
- a process according to claim 1 wherein the development anti-foggant compound is a mercaptotetrazole compound.
- a process according to claim 3 wherein the mercaptotetrazole compound is pheny'l mercaptotetrazole.
- a process according to claim 3 wherein the concentration of the mercaptotetrazole compound in the developer is from 0.01 to 0.1 g/litre.
- a process according to claim 1 wherein the development anti-foggant compound is a nitrobenzimidazole, a nitroindazole, a benzotriazole or a methylbenzotriazole.
- concentration of the development anti-foggant compound in the developer is from 0.05 to 0.5 g/litre.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
This invention relates to the rapid processing of photographic material. The development takes place in a solution which contains a 3-pyrazolidone compound, a hydroquinone and a development anti-foggant.
Description
[ Oct. 1, 1974 1 PROCESS FOR THE PRODUCTION OF A PHOTOGRAPHIC PRINT [75] Inventors: Monica Hilary Gent; Brian George Sanderson, both of llford, England [73] Assignee: Ilford Limited, Ilford, Essex,
England [22] Filed: Oct. 12, 1972 [21] Appl. No.: 297,085
[52] US. Cl. 96/665, 96/66 HD [51] Int. Cl G03c 5/30 [58] Field of Search.. 96/50 PT, 66 R, 66.3, 66 HD,
[56] References Cited UNITED STATES PATENTS 3,397,987 8/1968 Luckey et al. 96/66.5
3,576,633 4/1971 Henn et al. 96/66.5 3,647,459 3/1972 Taber et al. 3,718,469 2/1973 Hatano et al. 96/50 R OTHER PUBLICATIONS Mason, Photographic Processing Chemistry, 1966, pp. 3941, 153-154.
[5 7] ABSTRACT This invention relates to the rapid processing of photographic material. The development takes place in a solution which contains a 3-pyrazol1d0ne compound,
a hydroquinone and a development anti-foggant.
7 Claims, No Drawings PROCESS FOR THE PRODUCTION OF A PHOTOGRAPHIC PRINT 1n the processing of most photographic print material of the silver halide emulsion type, the material after an imagewise exposure, is developed by immersion in a sil-,
I A substantial number of photographic prints are now i made from photographic material which comprises a silver halide emulsion coated on a base which consists of a paper sheet laminated on both sides to a polyethylene layer. lt is possible to process exposed photographic material of this type which is hereinafter referred to a polyethylene laminated photographic material relatively rapidly because processing solutions cannot be absorbed by the paper base since they never come into contact with it. Thus the washing stage in the normal processing sequence may be shortened very greatly since it is required to remove the excess processing chemicals and processing reaction products only from the emulsion and not from paper base as well. Interest, therefore, has arisen in trying to reduce the time required for the remainder of the processing sequence when processing polyethylene laminated photographic material.
The greatest period of time spent by an operator in the processing of polyethylene laminated photographic material is the time spent waiting to visually examine the exposed material after immersion in the developing solution. Photographic developing solutions have an appreciable induction period, that is to say to seconds elapse before any image appears on the print material after it has been immersed in the developing solution. As soon as the image starts to appear it develops very rapidly so that within 1 or 2 seconds after its first appearance the operator would be able to tell ifthe exposure time were correct and thus if the print is able to be used. This has the advantages of reducing the time wasted if the print is incorrectly exposed and of reducing the overall development time when correctly exposed.
It is the object of the present invention to provide a process for the production of a photographic print using polyethylene laminated photographic material wherein the induction period in the developer solution is considerably reduced.
Therefore according to the present invention in a process for the production of a photographic print using polyethylene laminated photographic material of the silver halide emulsion type which comprises the sequential steps of imagewise exposing the material, developing the latent silver image, fixing out the unexposed silver halide, washing the fixed material and drying the material there is provided the step of developing the exposed photographic material in a silver halide developer solution which comprises from 0.5 to 2 g per litre of a 3-pyrazolidone compound of the general formula. RIHC C=O wherein R is a hydrogen atom or a methyl group and R is a hydrogen atom or an alkyl or alkoxy group containing fromone to four carbon atoms, together with hydroquinone or a substituted hydroquinone developing agent, the ratio by weight of the hydroquinone or substituted hydroquinone to the 3-pyrazolidinone compound being from 3 1 to 5 l and there being present in the silver halide developing solution sufficient development anti-foggant to prevent-a properly exposed print from being fogged, the pH of the developer being 10.0 to 11.5.
The preferred 3-pyrazolidone is 1-phenyl-3- pyrazolidone. Examples of suitable substituted hydroquinones are chloro-hydroquinone and methyl hydroquinone.
Any of the usual development anti-foggants may be used. However they must be present at an appreciably higher concentration in the developer solution than the concentration present in most normal developing solutions.
For example mercapto-tetrazole compounds which are well-known as development antifoggants may be used. Preferably the concentration of these compounds in the developer solution is within the range of 0.01 to 0.1 g/litre. The preferred mercapto-tetrazole for use in the invention is phenyl mercapto-tetrazole 7 Other w eTl-liiiown development antifoggant compounds which may be used are nitrobenzimidazoles, for example 5-nitrobenzimidazole, nitroindazoles, for example 6-nitroindazole and 5-nitroindazole, benzotriazole and derivatives of benzotriazole for example 5- methylbenzotriazole. Preferably the concentration of these compounds in the developer solution is within the range of 0.05 to 0.5 g/litre. i I V The pH of the developer solution of use in the present invention is preferably 10.6, but can be within the range 10.0 to 11.5.
The developer solution of use in the present invention may contain in addition the normal constituents of developing solutions, e.g., sequestering agents, potassium bromide as a restrainer, antioxidants such as sodium sulphite. Water-miscible solvents e.g. ethylene glycol monomethyl ether, to help dissolve the l-phenyl- 3-pyrazolidone, may be present when the developer is compounded as liquid concentrate and is to be diluted 1 part plus 9 parts water for use. Concentrates for dilution in the range 5 fold to 20 fold may also be prepared.
3-Pyrazolidone compounds of the formula hereinbefore set forth and in particular l-phenyl-3-pyrazolidone have found great use as photographic developing agents. However they are normally used in small amounts, e.g. from 0.05 to 0.2 grams per litre, together with relatively greater amounts of hydroquinone, e.g.
from 5 to 15 g/litre to form a synergistic developing solution. When synergistic developing solutions of this type are used the induction period of print photographic material developed therein is about 20 seconds. However when polyethylene laminated photographic material is developed in the developing solution of the present invention the induction period is reduced virtually to nothing. This is both unexpected and very useful since it reduces very considerably the pe riod required for the operator to have to wait in order to visually examine the photographic material in the developing solution while the image is developing. Further the process of the present invention enables the development time required in the processing of each polyethylene laminated photographic print to be reduced by between 20 seconds and 1 minute.
The following Example will serve to illustrate the invcntion.
EXAMPLE The following developing solution was compounded:
Sodium sulphite, anhydr. Hydroquinone Potassium carbonate l -phenyl-3-pyrazolidone Sodium hydroxide Potassium bromide Phenyl mercapto tetrazole Ethylene diamine tetraacetic acid (disodium) Ethylencglycol monomethyl ether Water 0.15 g. l ml. to l litre Ammonium thiosulphate (60% w/w solution) Boric acid Sodium hydroxide Sodium metahisulphite Sodium sulphite. anhydrous Acetic acid. glacial Water Then the material was washed for 1 minute in running cold water. Finally the print was dried for 30 seconds in a hot air cabinet. A fully developed dry print was obtained by this process after 3 minutes.
in another test using the same photographic material but wherein the formula of the developer used was:
Sodium sulphite. anhydrous Hydroquinone Potassium carbonate l-Phenyl-B-pyrazolidone Sodium hydroxide 0.55 Potassium bromide 0.5 Benzotriazole 0.06
Water to l The induction period of the material in the developer before any image appeared was seconds and 120 seconds were required for full development. Thereafter the material was fixed, washed and dried as before. A fully developed dried print was obtained after 4 /2 minutes. Thus by the process of the present invention an overall saving ofa little more than 1 minute in the processing of a print was obtained. However 20 seconds of this is time which would have been spent by the operator doing nothing but waiting to inspect the photographic material in the developer.' The overall reduction in time is due to the greater activity of the developer. Nevertheless, the total time of the material in the developer is sufficiently long to enable the operator to obtain an acceptable print, e.g., removing it from the developer before the 1 minute, if it has been overexposed.
We claim:
1. In a process for the production of a photographic print using polyethylene laminated photographic material having coated thereon at least one silver halide emulsion layer which process comprises the sequential steps of imagewise exposing the material, developing the latent silver image, fixing out the unexposed silver halide, washing the fixed material and drying the material the improvement which comprises developing the exposed photographic material in a silver halide developer solution which comprises from 0.5 to 2 g per litre of a 3-pyrazolidone compound of the formula wherein R is a hydrogen atom or a methyl group and R is a hydrogen atom or an alkyl or alkoxy group containing from one to four carbon atoms, together with a hydroquinone developing agent, the ratio by weight of the hydroquinone developing agent to the 3- pyrazolidinone compound being from 3 l to 5 1 and there being present in the silver halide developing solution sufficient development antifoggant to prevent a properly exposed print from being fogged, the development anti-foggant being selected from the group consisting of a mercapto-tetrazole, a nitrobenzimidazole, a nitroindazole and a benzotriazole, the pH of the developer being 11.0 to ll.5.
2. A process according to claim 1 wherein the 3- pyrazolidinone is l-phenyl 3-pyrazolidinone.
3. A process according to claim 1 wherein the development anti-foggant compound is a mercaptotetrazole compound.
4. A process according to claim 3 wherein the mercaptotetrazole compound is pheny'l mercaptotetrazole.
5. A process according to claim 3 wherein the concentration of the mercaptotetrazole compound in the developer is from 0.01 to 0.1 g/litre.
6. A process according to claim 1 wherein the development anti-foggant compound is a nitrobenzimidazole, a nitroindazole, a benzotriazole or a methylbenzotriazole.
7. A process according to claim6 wherein the concentration of the development anti-foggant compound in the developer is from 0.05 to 0.5 g/litre.
Claims (7)
1. IN A PROCESS FOR THE PRODUCTIION OF A PHOTOGRAPHIC PRINT USING POLYETHYLENE LAMINATED PHOTOGRAPHIC MATERIAL HAVING COATED THEREON AT LEAST ONE SILVER HALIDE EMULSION LAYER WHICH PROCESS COMPRISES THE SEQUENTIAL STEPS OF IMAGEWISE EXPOSING THE MATERIAL, DEVELOPING THE LATENT SILVER IMAGE, FIXING OUT THE UNEXPOSED SILVER HALIDE, WASHING THE FIXED MATERIAL AND DRYING THE MATERIAL THE IMPROVEMENT WHICH COMPRISES DEVELOPING THE EXPOSED PHOTOGRAPHIC MATERIAL IN A SILVER HALIDE DEVELOPER SOLUTION WHICH COMPRISES FROM 0.5 TO 2 G PER LITRE OF A 3PYRAZOLIDONE COMPOUND OF THE FORMULA
2. A process according to claim 1 wherein the 3-pyrazolidinone is 1-phenyl - 3-pyrazolidinone.
3. A process accordIng to claim 1 wherein the development anti-foggant compound is a mercaptotetrazole compound.
4. A process according to claim 3 wherein the mercaptotetrazole compound is phenyl mercaptotetrazole.
5. A process according to claim 3 wherein the concentration of the mercaptotetrazole compound in the developer is from 0.01 to 0.1 g/litre.
6. A process according to claim 1 wherein the development anti-foggant compound is a nitrobenzimidazole, a nitroindazole, a benzotriazole or a methylbenzotriazole.
7. A process according to claim 6 wherein the concentration of the development anti-foggant compound in the developer is from 0.05 to 0.5 g/litre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00297085A US3839046A (en) | 1972-10-12 | 1972-10-12 | Process for the production of a photographic print |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00297085A US3839046A (en) | 1972-10-12 | 1972-10-12 | Process for the production of a photographic print |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3839046A true US3839046A (en) | 1974-10-01 |
Family
ID=23144797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00297085A Expired - Lifetime US3839046A (en) | 1972-10-12 | 1972-10-12 | Process for the production of a photographic print |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3839046A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083722A (en) * | 1976-03-15 | 1978-04-11 | William Alexander Anneman | Developer composition and process for developing photographic film |
| US4205124A (en) * | 1978-02-09 | 1980-05-27 | The United States Of America As Represented By The Secretary Of The Air Force | Low gamma photographic developer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3397987A (en) * | 1965-05-24 | 1968-08-20 | Eastman Kodak Co | Photographic emulsion containing mercapto development anti-foggants |
| US3576633A (en) * | 1967-06-27 | 1971-04-27 | Eastman Kodak Co | Photographic process and compositions |
| US3647459A (en) * | 1967-06-28 | 1972-03-07 | Eastman Kodak Co | Novel photographic elements and means for rapid processing of photographic elements |
| US3718469A (en) * | 1969-10-17 | 1973-02-27 | Fuji Photo Film Co Ltd | Making of a photographic image |
-
1972
- 1972-10-12 US US00297085A patent/US3839046A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3397987A (en) * | 1965-05-24 | 1968-08-20 | Eastman Kodak Co | Photographic emulsion containing mercapto development anti-foggants |
| US3576633A (en) * | 1967-06-27 | 1971-04-27 | Eastman Kodak Co | Photographic process and compositions |
| US3647459A (en) * | 1967-06-28 | 1972-03-07 | Eastman Kodak Co | Novel photographic elements and means for rapid processing of photographic elements |
| US3718469A (en) * | 1969-10-17 | 1973-02-27 | Fuji Photo Film Co Ltd | Making of a photographic image |
Non-Patent Citations (1)
| Title |
|---|
| Mason, Photographic Processing Chemistry, 1966, pp. 39 41, 153 154. * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083722A (en) * | 1976-03-15 | 1978-04-11 | William Alexander Anneman | Developer composition and process for developing photographic film |
| US4205124A (en) * | 1978-02-09 | 1980-05-27 | The United States Of America As Represented By The Secretary Of The Air Force | Low gamma photographic developer |
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