EP0559276A1 - Processing photographic colour negative films - Google Patents
Processing photographic colour negative films Download PDFInfo
- Publication number
- EP0559276A1 EP0559276A1 EP93200538A EP93200538A EP0559276A1 EP 0559276 A1 EP0559276 A1 EP 0559276A1 EP 93200538 A EP93200538 A EP 93200538A EP 93200538 A EP93200538 A EP 93200538A EP 0559276 A1 EP0559276 A1 EP 0559276A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dye
- bleach
- layer
- silver
- reduced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
- G03C1/83—Organic dyestuffs therefor
- G03C1/832—Methine or polymethine dyes
Definitions
- This invention relates to the processing of photographic colour negative films.
- Photographic colour materials which typically have emulsion layers sensitised to the red, green and blue regions of the spectrum need an antihalation layer which absorbs in all three regions.
- Colour films are able to use a grey metallic silver layer as an antihalation layer (type 1 above) because it will be removed during processing in the bleach and fix baths. This is convenient because silver absorbs fairly uniformly across the spectrum. All commercially available colour negative films use such a grey silver antihalation layer.
- US Patent 4 092 168 discloses the use of dyes of the type used in the present invention, for use in antihalation layers in black and white photographic materials. This is said to be an improvement over the previous practice of using a mixture of dyes to allow absorption across the whole visible spectrum.
- the specific disclosure is of an antihalation backing layer covered with an anticurl layer. The dye is removed from the film during processing. It is noted that a grey silver antihalation layer cannot be removed from black and white materials in the bleach because the bleach bath would not only bleach the antihalation layer but also the silver image.
- US Patent 4 855 221 describes the use of solid particle dispersions of certain oxonol dyes (preferred for use in the present invention) as filter layers in photographic materials. Multicolour photographic elements are mentioned but no photosensitive materials are actually exemplified.
- a method of processing an imagewise exposed photographic multilayer colour negative film comprising at least three silver halide differently sensitised emulsion layers having associated respectively therewith different dye image-forming couplers and having between the emulsion layers and the support a silver-containing antihalation layer, comprising at least the steps of colour development, bleaching and fixing characterised in that the chemical load on the bleach bath is reduced by using a dye-containing, silver-free layer which is destroyed or otherwise removed during photographic processing as the sole antihalation layer in the film.
- the present invention will usually also reduce the chemical load on the fix solution as well.
- the reduction in chemical load may be achieved in a number of ways. For example, the rate of replenishment of the bleach and fix baths may be reduced. Alternatively the concentration of the two baths may be reduced or the time of processing may be reduced.
- the present invention has the advantage of reducing the chemical load on the bleach and usually the fix bath as well.
- the advantage may be taken as lower replenishment rates, lower concentrations of active ingredients, faster processing times or combinations thereof.
- the quantity of effluent is also reduced.
- the presence in colour negative films of a grey silver layer (in its bleached form) can provide a catalyst for the formation of silver iodide (which is very difficult to fix out) at the latter part of the fix process thereby making the fix step take a longer time. This problem is also avoided.
- the bleach solution oxidises metallic silver to a silver salt.
- the oxidising (or bleaching) agent may comprise iron(III), for example in the form of an alkali metal ferricyanide, permanganate, dichromate, ferric ethylenediamine-tetraacetic acid, ferric propylenediamine-tetraacetic acid, or hydrogen peroxide.
- iron(III) for example in the form of an alkali metal ferricyanide, permanganate, dichromate, ferric ethylenediamine-tetraacetic acid, ferric propylenediamine-tetraacetic acid, or hydrogen peroxide.
- the fixer may comprise an alkali metal or ammonium thiosulphate or thiocyanate as fixing agent or, in the case of low silver coating weight materials comprising silver chloride, and alkali metal sulphite. Again fix baths are well known and are described in "Modern Photographic Processing" above.
- the bleach and the fix baths may be combined into a single bleach-fix bath and these are also described in "Modern Photographic Processing" above.
- processing solutions are replenished to replace active ingredients used up during processing or which are destroyed by chemical reaction either during processing or when standing idle, for example by aerial oxidation.
- replenishment techniques and solutions are well understood.
- the dye is preferably an oxonol dye. Such dyes are bleached by the sulphite ions in the developer solution.
- the dye has the general formula: wherein R1 to R4 are each individually hydrogen, halogen or an alkyl, aryl, heterocyclic, R5X-, R5X-NR6-, R5R6N-X- any of which may be further substituted, -COOH OR SO3H, wherein X is CO or SO2 and R5 and R6 are alkyl, aryl or heterocyclic groups which can be further substituted, and n is 0 to 3.
- the dyes of formula I and II may be coated as solutions or solid dye dispersions.
- the present colour films preferably comprise a yellow dye image-forming unit comprised of at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, at least one magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler at least one cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, said image-forming units being carried on a support.
- the couplers, emulsions, additives, supports, structure, etc of the present colour films may be any of those described in Research Disclosure Item 308119, December 1989 published by Kenneth Mason Publications, Emsworth, Hants, United Kingdom.
- the invention is illustrated by the following Example.
- a standard full colour photographic negative film was coated with modification to the anti-halation layer, which was coated on top of subbed base over which was coated the remainder of the film.
- the antihalation layer either contained the usual grey silver with silver levels varied, a dye of Formula II, as a replacement for the grey silver, also coated at different levels.
- a plain gelatin layer was also coated with each set as a control.
- the bleaching time was monitored by measuring the infra-red density of the film continuously while in the bleach. The time at which the density had ceased to change was taken as the bleach time.
- Table 1 shows the bleaching times and sharpnesses, measured as AMT numbers (the bigger, the sharper) of the coatings in both 35mm and Disc film formats.
- Table 1 AHU type Silver or Dye Laydown (g/m ⁇ 2) Bleach Time (secs) Fix Time (secs) AMT 35mm Disc Gel - 72 ⁇ 5 42 91.8 82.9 Gel+Ag 0.1 77 ⁇ 5 44 94.3 85.7 0.2 80 ⁇ 5 46 94.1 85.1 0.3 99 ⁇ 5 47 93.6 84.8 0.4 140 ⁇ 5 50 92.9 83.9 Gel - 61 ⁇ 5 38 91.1 82.6 Gel+Dye 0.02 62 ⁇ 5 37 93.3 84.8 0.04 50 ⁇ 5 39 93.2 84.6 0.08 58 ⁇ 5 40 93.9 85.4 0.10 56 ⁇ 5 39
- the tanks of the processor were filled with the solutions described in Example 1.
- Replenishers were made up as described below and the rate of replenishment of the bleach and fix adjusted so that the bleaching and fixing were just adequate to remove the silver from the film after three tank turnovers of seasoning.
- Developer Replenisher Diethylenetriaminepentacetic acid 2.0g Sodium sulphite anh.
- the resulting replenishment rates (expressed as mls per linear metre of film) can be reduced by having a dye AHU layer. This would result in a saving of over 75% iron and associated chelate in the effluent and 4% sulphur compound from the fixer.
- Example 2 was repeated but in this instance the replenishment rates of the bleach and fixer were held at 21.9 mls/m and 28.9 mls/m respectively and the concentrations of the active ingredients in the replenishers varied until the process just remove all the silver from the films after seasoning for three tank turnovers. The results are shown in the table below.
- Antihalation layer Replenisher concentrations Bleach Fixer Silver AHU 0.15 molar 146g/l Dye AHU 0.14 molar 140g/l
- the fixing time for the film with the silver AHU was 190s and that with the dye AHU 170s. This shows a benefit in fixing time of a dye AHU layer in an all sodium fixer.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
A method of reducing the chemical load on the bleach bath during the processing an imagewise exposed photographic multilayer colour negative film by using, instead of a grey silver antihalation layer, a dye-containing, silver-free layer which is destroyed or otherwise removed during photographic processing as the sole antihalation layer in the film.
Description
- This invention relates to the processing of photographic colour negative films.
- In "The Theory of the Photographic Process", Ed. T. H. James, Macmillan 1977 at page 579 it states that reflections back from the support of a photographic material causes the appearance of halos around bright objects. This effect is known as halation and results generally in a loss of sharpness of the image. It further states therein that three methods can be used to reduce its effect:
- (1) Coating an antihalation undercoat which is either dyed gelatin or gelatin containing grey silver (used in colour films) between the emulsion and the support;
- (2) Coating the emulsion on a support that contains either dye or pigments (for example carbon); and
- (3) Coating the emulsion on a transparent support that has a dyed or pigmented layer coated on the back (or opposite side) of the support.
- It is clear that it is only necessary to reduce reflected light in the spectral regions to which the emulsion(s) are sensitive. Thus, for an infra-red sensitive film for example, it is only necessary to absorb infra-red radiation in the antihalation layer. It is for this reason that many black and white materials have antihalation layers formed of coloured dyes or pigments.
- Photographic colour materials which typically have emulsion layers sensitised to the red, green and blue regions of the spectrum need an antihalation layer which absorbs in all three regions. Colour films are able to use a grey metallic silver layer as an antihalation layer (type 1 above) because it will be removed during processing in the bleach and fix baths. This is convenient because silver absorbs fairly uniformly across the spectrum. All commercially available colour negative films use such a grey silver antihalation layer.
- US Patent 4 092 168 discloses the use of dyes of the type used in the present invention, for use in antihalation layers in black and white photographic materials. This is said to be an improvement over the previous practice of using a mixture of dyes to allow absorption across the whole visible spectrum. The specific disclosure is of an antihalation backing layer covered with an anticurl layer. The dye is removed from the film during processing. It is noted that a grey silver antihalation layer cannot be removed from black and white materials in the bleach because the bleach bath would not only bleach the antihalation layer but also the silver image.
- US Patent 4 855 221 describes the use of solid particle dispersions of certain oxonol dyes (preferred for use in the present invention) as filter layers in photographic materials. Multicolour photographic elements are mentioned but no photosensitive materials are actually exemplified.
- There is constant desire to reduce the chemical load on photographic processing solutions to reduce chemical consumption and to reduce the amount of effluent which has to be safely disposed of without compromising film performance.
- According to the present invention there is provided a method of processing an imagewise exposed photographic multilayer colour negative film comprising at least three silver halide differently sensitised emulsion layers having associated respectively therewith different dye image-forming couplers and having between the emulsion layers and the support a silver-containing antihalation layer, comprising at least the steps of colour development, bleaching and fixing characterised in that the chemical load on the bleach bath is reduced by using a dye-containing, silver-free layer which is destroyed or otherwise removed during photographic processing as the sole antihalation layer in the film.
- The present invention will usually also reduce the chemical load on the fix solution as well.
- The reduction in chemical load may be achieved in a number of ways. For example, the rate of replenishment of the bleach and fix baths may be reduced. Alternatively the concentration of the two baths may be reduced or the time of processing may be reduced.
- The present invention has the advantage of reducing the chemical load on the bleach and usually the fix bath as well. The advantage may be taken as lower replenishment rates, lower concentrations of active ingredients, faster processing times or combinations thereof. In addition the quantity of effluent is also reduced. The presence in colour negative films of a grey silver layer (in its bleached form) can provide a catalyst for the formation of silver iodide (which is very difficult to fix out) at the latter part of the fix process thereby making the fix step take a longer time. This problem is also avoided.
- The bleach solution oxidises metallic silver to a silver salt. The oxidising (or bleaching) agent may comprise iron(III), for example in the form of an alkali metal ferricyanide, permanganate, dichromate, ferric ethylenediamine-tetraacetic acid, ferric propylenediamine-tetraacetic acid, or hydrogen peroxide. Such baths are well known and are described, for example, in "Modern Photographic Processing", Grant Haist, John Wiley, New York, and "The Theory of the Photographic Process", fourth edition, Ed. James, MacMillan.
- The fixer may comprise an alkali metal or ammonium thiosulphate or thiocyanate as fixing agent or, in the case of low silver coating weight materials comprising silver chloride, and alkali metal sulphite. Again fix baths are well known and are described in "Modern Photographic Processing" above.
- The bleach and the fix baths may be combined into a single bleach-fix bath and these are also described in "Modern Photographic Processing" above.
- When used commercially, as is well known, processing solutions are replenished to replace active ingredients used up during processing or which are destroyed by chemical reaction either during processing or when standing idle, for example by aerial oxidation. The nature of such replenishment techniques and solutions are well understood.
- The dye is preferably an oxonol dye. Such dyes are bleached by the sulphite ions in the developer solution. Preferably the dye has the general formula:
wherein R¹ to R⁴ are each individually hydrogen, halogen or an alkyl, aryl, heterocyclic, R⁵X-, R⁵X-NR⁶-, R⁵R⁶N-X- any of which may be further substituted, -COOH OR SO₃H, wherein X is CO or SO₂ and R⁵ and R⁶ are alkyl, aryl or heterocyclic groups which can be further substituted, and
n is 0 to 3. -
- In addition to the above dyes it is also possible to use a dye which is soluble in one or more of the processing solutions used so that it is leached out of the film during processing.
- The present colour films preferably comprise a yellow dye image-forming unit comprised of at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, at least one magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler at least one cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, said image-forming units being carried on a support.
- The couplers, emulsions, additives, supports, structure, etc of the present colour films may be any of those described in Research Disclosure Item 308119, December 1989 published by Kenneth Mason Publications, Emsworth, Hants, United Kingdom.
- The invention is illustrated by the following Example.
- A standard full colour photographic negative film was coated with modification to the anti-halation layer, which was coated on top of subbed base over which was coated the remainder of the film. The antihalation layer either contained the usual grey silver with silver levels varied, a dye of Formula II, as a replacement for the grey silver, also coated at different levels. A plain gelatin layer was also coated with each set as a control.
- Strips of the coated materials were processed in the following process:
Film Development Process at 38 °C 1. Colour developer 3.25 mins 2. Bleach see below 3. Wash 1.5 mins 4. Fix 4.3 mins 5. Stabilise 1.0 mins Colour developer Diethylenetriaminepentacetic acid 2.0 g Sodium sulphite (anhy) 4.25 g Potassium bromide 1.5 g Hydroxylamine sulphate 2.0 g Potassium carbonate 25.0 g 4-(N-ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine 4.75 g Water to 1.0 litre pH = 10.1 Bleach Potassium iron(III) 1,3-propylenediamine-tetra-acetic acid 0.11 molar Potassium bromide 0.4 molar Acetic acid 1.0 molar pH adjusted to 4.75 at 25°C Fixer Ammonium thiosulphate 120.0 g Sodium sulphite (anhy) 20.0 g Potassium metabisulphite 20.0 g Water to 1.0 litre Stabiliser Formaldehyde (36% soln) 6.0 ml Water to 1.0 litre - The bleaching time was monitored by measuring the infra-red density of the film continuously while in the bleach. The time at which the density had ceased to change was taken as the bleach time.
- Table 1 shows the bleaching times and sharpnesses, measured as AMT numbers (the bigger, the sharper) of the coatings in both 35mm and Disc film formats.
Table 1 AHU type Silver or Dye Laydown (g/m⁻²) Bleach Time (secs) Fix Time (secs) AMT 35mm Disc Gel - 72±5 42 91.8 82.9 Gel+Ag 0.1 77±5 44 94.3 85.7 0.2 80±5 46 94.1 85.1 0.3 99±5 47 93.6 84.8 0.4 140±5 50 92.9 83.9 Gel - 61±5 38 91.1 82.6 Gel+Dye 0.02 62±5 37 93.3 84.8 0.04 50±5 39 93.2 84.6 0.08 58±5 40 93.9 85.4 0.10 56±5 39 - These results indicate that both the silver and dye antihalation layers give sharper images as measured using the AMT metric compared to the pure gelatin control layers. However the use of silver increases both the bleaching and fixing times, whereas the use of dye makes very little or no impact on the bleaching time, in most cases reducing it. Using the dye can therefore give sharp images without increased process time. The consumption of less bleaching and fixing agent per film will also reduce effluent levels.
- Two coatings of a ISO400 speed film were made containing 2.5g/m² imaging silver in the each of the blue, green and red sensitive layers. Each film had a yellow silver filter layer with a coated laydown of 0.2g/m². One of the films was coated with a grey silver AHU(comparison) and the other a dye layer coated at 0.04g/m² dye as described in Example 1. These films were processed in a processing machine with the following process times and temperatures:
Time Temperature Develop 3.25 mins 37.8°C Bleach 3.33 mins 38.0°C Fixer 1.50 mins 38.0°C Wash 3.00 mins 38.0°C Stabiliser 1.00 mins 38.0°C Dry 2.00 mins 40.0°C - The tanks of the processor were filled with the solutions described in Example 1. Replenishers were made up as described below and the rate of replenishment of the bleach and fix adjusted so that the bleaching and fixing were just adequate to remove the silver from the film after three tank turnovers of seasoning.
Developer Replenisher Diethylenetriaminepentacetic acid 2.0g Sodium sulphite anh. 5.0g Potassium bromide 1.0g Hydroxylamine sulphate 2.5g N-1-ethyl-N-2-hydroxyethyl-2-Methyl-p-phenylenediamine 5.2g Potassium carbonate 25.0 Water to 1 litre pH adjusted to 10.13
Replenishment rate fixed at 39mls/mBleach Replenisher Potassium iron(III)-1,3-propylenediamine-tetracetic acid 0.15molar Potassium bromide 0.6molar Acetic acid 1.5molar pH adjusted to 4.25 Fixer Replenisher Ammonium thiosulphate 146g Sodium sulphite 15g Potassium metabisulphite 15g Water to 1litre Stabiliser Replenisher Formaldehyde (36% solution) 7.0 ml Water to 1 litre 1.0mls Replenisher fixed at 65ml/m Antihalation layer Replenishment rates (mls/m) Bleach Fixer Silver AHU 21.9 28.9 Dye AHU 4.9 27.6 - As can be seen the resulting replenishment rates (expressed as mls per linear metre of film) can be reduced by having a dye AHU layer. This would result in a saving of over 75% iron and associated chelate in the effluent and 4% sulphur compound from the fixer.
- Example 2 was repeated but in this instance the replenishment rates of the bleach and fixer were held at 21.9 mls/m and 28.9 mls/m respectively and the concentrations of the active ingredients in the replenishers varied until the process just remove all the silver from the films after seasoning for three tank turnovers. The results are shown in the table below.
Antihalation layer Replenisher concentrations Bleach Fixer Silver AHU 0.15 molar 146g/l Dye AHU 0.14 molar 140g/l - Again a saving of materials can be gained and less chemistry goes to waste.
- The fixing rates of the two films after they had been processed through the developer and bleach as described in Example 2 were measured in an all sodium fixer of the following constitution:
Sodium thiosulphate pentahydrate 200g Sodium sulphite 20g Sodium metabisulphite 20g Water to 1litre - The fixing time for the film with the silver AHU was 190s and that with the dye AHU 170s. This shows a benefit in fixing time of a dye AHU layer in an all sodium fixer.
Claims (11)
- A method of processing an imagewise exposed photographic multilayer colour negative film comprising at least three silver halide differently sensitised emulsion layers having associated respectively therewith different dye image-forming couplers and having between the emulsion layers and the support a silver-containing antihalation layer, comprising at least the steps of colour development, bleaching and fixing characterised in that the chemical load on the bleach bath is reduced by using a dye-containing, silver-free layer which is destroyed or otherwise removed during photographic processing as the sole antihalation layer in the film.
- A method as claimed in claim 1 wherein the dye is an oxonol dye.
- A method as claimed in claim 1 or 2 wherein the dye has the general formula:
R⁵ and R⁶ are alkyl, aryl or heterocyclic groups which can be further substituted and
n is 0 to 3. - A method as claimed in any of claims 1 to 3 wherein the dye is present as a solid particle dispersion.
- A method as claimed in any of claims 1 to 5 wherein the hydrophilic colloid comprises gelatin or a derivative thereof.
- A method as claimed in any of claims 1 to 6 in which the film comprises a yellow dye image-forming unit comprised of at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, at least one magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler at least one cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, said image-forming units being carried on a support.
- A method as claimed in any of claims 1-7 in which the chemical load on the fixer solution is also reduced.
- A method as claimed in any of claims 1-8 in which the chemical load is reduced by reducing the rate of replenishment of the bleach and optionally the fix solution.
- A method as claimed in any of claims 1-8 in which the chemical load is reduced by reducing the concentration of the bleach and optionally the fix solution.
- A method as claimed in any of claims 1-8 in which the chemical load is reduced by reducing the processing time in the bleach and optionally fix solutions.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929204406A GB9204406D0 (en) | 1992-02-29 | 1992-02-29 | Photographic antihalation layers |
GB9204406 | 1992-02-29 | ||
GB929216330A GB9216330D0 (en) | 1992-07-31 | 1992-07-31 | Processing photographic colour negative films |
GB9216330 | 1992-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0559276A1 true EP0559276A1 (en) | 1993-09-08 |
Family
ID=26300395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93200538A Withdrawn EP0559276A1 (en) | 1992-02-29 | 1993-02-25 | Processing photographic colour negative films |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0559276A1 (en) |
JP (1) | JPH063789A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0299435A2 (en) * | 1987-07-13 | 1989-01-18 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Photographic oxonol colour filter dyes |
EP0316013A2 (en) * | 1987-11-11 | 1989-05-17 | Fuji Photo Film Co., Ltd. | Silver halide photographic material having at least one dyed hydrophilic colloid layer |
-
1993
- 1993-02-25 EP EP93200538A patent/EP0559276A1/en not_active Withdrawn
- 1993-02-26 JP JP3832693A patent/JPH063789A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0299435A2 (en) * | 1987-07-13 | 1989-01-18 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Photographic oxonol colour filter dyes |
EP0316013A2 (en) * | 1987-11-11 | 1989-05-17 | Fuji Photo Film Co., Ltd. | Silver halide photographic material having at least one dyed hydrophilic colloid layer |
Also Published As
Publication number | Publication date |
---|---|
JPH063789A (en) | 1994-01-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0470083B1 (en) | Method of photographic processing | |
JPS5836332B2 (en) | Processing method for silver halide photographic materials | |
US5670300A (en) | Method of processing photographic silver halide materials | |
US5445925A (en) | Method of forming a photographic color image | |
US4863837A (en) | Method of processing light-sensitive silver halide color photographic material comprising combinations of two different sequestering agents and a sensitizing dye | |
JPS589940B2 (en) | Gazokeiseihouhou | |
EP0559276A1 (en) | Processing photographic colour negative films | |
US5246822A (en) | Method of photographic processing | |
US6063553A (en) | Photographic recording materials and their use in redox amplification | |
US5298369A (en) | Use of colloidal silver to improve push processing of a reversal photographic element | |
EP0727702A2 (en) | Photographic element with color enhancing layer adjacent to an emulsion layer and an oxidized developer scavenger layer | |
US5756270A (en) | Method of processing a photographic silver halide color material | |
US5389501A (en) | Method of fixing a photographic material | |
US5876906A (en) | Method of processing photographic silver halide materials | |
US5945266A (en) | Dye image forming photographic element and processing to produce a viewable image | |
US5652087A (en) | Bleach regenerator composition and its use to process reversal color photographic elements | |
US2553498A (en) | First developer for multilayer color film of the reversal type | |
US5965334A (en) | Process for the development of photographic materials | |
US6174653B1 (en) | Method for rapid photographic processing | |
US5441853A (en) | Method of making stable color photographic prints | |
EP0617324B1 (en) | Use of pyrazolidinone compounds to reduce granularity of photographic silver halide materials | |
US5914225A (en) | Color photographic element with enhanced properties at reduced development times | |
US5925504A (en) | Method of forming a photographic color image | |
JPS63139348A (en) | Method for processing silver halide color photographic sensitive material having excellent rapid processing | |
GB2305737A (en) | Processing photographic colour materials |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE FR GB IT LI NL |
|
17P | Request for examination filed |
Effective date: 19940222 |
|
17Q | First examination report despatched |
Effective date: 19940812 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19941215 |