WO1991017479A1 - Improvements relating to a photographic process - Google Patents
Improvements relating to a photographic process Download PDFInfo
- Publication number
- WO1991017479A1 WO1991017479A1 PCT/EP1991/000845 EP9100845W WO9117479A1 WO 1991017479 A1 WO1991017479 A1 WO 1991017479A1 EP 9100845 W EP9100845 W EP 9100845W WO 9117479 A1 WO9117479 A1 WO 9117479A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- developer
- bath
- exchange resin
- ion exchange
- amplification bath
- Prior art date
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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/395—Regeneration of photographic processing agents other than developers; Replenishers therefor
- G03C5/3956—Microseparation techniques using membranes, e.g. reverse osmosis, ion exchange, resins, active charcoal
-
- 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/3017—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials with intensification of the image by oxido-reduction
Definitions
- the invention relates to a photographic process of the kind in which silver halide materials carried on a photographic carrier material is treated with a developer to develop an image and is then passed to an amplification bath. Subsequent to the amplification bath, the material is passed to a fixing and washing stage.
- the amplification bath itself has developer carried over into it which is transported on the material being processed and the presence of this developer builds up and shortens the life of the amplifier bath. In order to keep the bath up to the right strength it has to be replenished periodically to compensate for this build-up of developer.
- the step is included of treating the amplification bath with an absorbing agent to remove or substantially reduce the amount of developer retained in the bath.
- the absorbing agent is preferably an ionic exchange resin, which may be either cationic, anionic or neutral. In certain circumstances, a mixture of anionic and cationic resins may operate successfully.
- the agent may comprise an activated carbon such as activated charcoal.
- None of the prior art shows the use of absorbing agents in the tail-end of a photographic process which includes an amplification bath.
- the following example illustrates the effect of different absorbing materials when used to remove the colour-developing agent when used in an amplification bath:
- a simulated seasoned amplification bath was made by adding lOOmls. of an 'RX' developer to 500mls of an amplifier suitable for use with low silver materials.
- the formulae are as follows :
- CD3 8.Og water to 1.0 litre pH adjusted to 10.3 with potassium hydroxide solution
- Amplifier hydrogen peroxide ( 100 vol) 30mls water to 1.0 litre
- Activated charcoal 0.0+0.2g/l It will be seen from the above example that the absorbing agents all had an effect to a greater or lesser degree in reducing the amount of agent in the amplification bath. Clearly a selection of suitable agent has to be made depending on the nature of the developer in each bath. For the ' X'developer selected for this example there are five absorbing agents including both active charcoal and ion exchange resins which are wholly successful in removing all the developing agent.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Endoscopes (AREA)
- Exposure Control For Cameras (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
In a photographic process which includes a developer and an amplification bath, a photographic material is passed from the developer to the amplification bath and an absorbing agent is used to treat the amplification bath to remove any carried over developing agent which may cause degradation of the amplification bath or the photographic material being treated.
Description
IMPROVEMENTS RELATING TO A PHOTOGRAPHIC PROCESS
The invention relates to a photographic process of the kind in which silver halide materials carried on a photographic carrier material is treated with a developer to develop an image and is then passed to an amplification bath. Subsequent to the amplification bath, the material is passed to a fixing and washing stage.
During a process of this kind the amplification bath itself has developer carried over into it which is transported on the material being processed and the presence of this developer builds up and shortens the life of the amplifier bath. In order to keep the bath up to the right strength it has to be replenished periodically to compensate for this build-up of developer.
If developer is retained on the material and is not removed completely by the end of the photographic process there is the risk that the final print material obtained will be liable to subsequent staining as the retained developer in the gelatine or
its carrier will, under certain conditions, such as exposure to heat and light, cause further action by the developer which reacts with the constituents of the material to give an effect known as staining or a deeper intensity of certain colours. This is clearly not desirable since any photographic print is needed to remain stable over a long period and over a reasonable range of temperature and light conditions.
It is an object of the present invention to provide an improvement in a photographic process of the above kind which uses an amplification bath in which the problems associated with the build-up of developing agent are substantially reduced.
According to the present invention in a photographic process in which photographic material is treated in a developer is subsequently passed to an in-line amplification bath, the step is included of treating the amplification bath with an absorbing agent to remove or substantially reduce the amount of developer retained in the bath.
The absorbing agent is preferably an ionic exchange resin, which may be either cationic, anionic or neutral. In certain circumstances, a mixture of anionic and cationic resins may operate successfully.
As an alternative, the agent may comprise an activated carbon such as activated charcoal.
It has been known to use these absorbing agents for the treatment of waste solutions and to remove the colour developing agent from these waste solutions.
For example, in U.S. Patent Specification No. 4606827 the use of a cation exchange resin is disclosed with a solution which has a pH value not exceeding 8.0 for selective operation of a phenylenediamine colour developing agent to prevent the pollution of discharged waters into public sewers.
In British Patent Specification No. 2054182A the use of an ion exchange resin is disclosed to remove the degradation products of a developer in a fixer after
the fixer has been subject to electrolysis to remove the dissolved silver in it.
None of the prior art shows the use of absorbing agents in the tail-end of a photographic process which includes an amplification bath. The following example illustrates the effect of different absorbing materials when used to remove the colour-developing agent when used in an amplification bath:
EXAMPLE
A simulated seasoned amplification bath was made by adding lOOmls. of an 'RX' developer to 500mls of an amplifier suitable for use with low silver materials. The formulae are as follows :
Developer : potassium carbonate 30.Og sodium sulphite 2.Og disodium EDTA O.lg
CD3 8.Og water to 1.0 litre pH adjusted to 10.3 with potassium hydroxide solution
Amplifier : hydrogen peroxide ( 100 vol) 30mls water to 1.0 litre
50mls samples of the amplifier/developer mixture were stirred with 5g of different resins or charcoal for 10 minutes. The residual CD3 in the fixer mixture was determined by HPLC.
The results are tabulated below:
Addition Residual CD3 Resin Type
None 2.0+0.2g/l
Amberlite XAD-2 0.0+0.2g/l Neutral Amberlite XAD-7 0.0+0.2g/l Neutral
Amberlite IRA-400 1.0+0.2g/l Anionic
Duolite C225 1.2+0.2g/l Cationic
Duolite MB5113 0.0+0.2g/l Mixed bed
Zerolit NIP 1.0+0.2g/l Anionic Zerolit 236 0.0+0.2g/l Cationic
Activated charcoal 0.0+0.2g/l
It will be seen from the above example that the absorbing agents all had an effect to a greater or lesser degree in reducing the amount of agent in the amplification bath. Clearly a selection of suitable agent has to be made depending on the nature of the developer in each bath. For the ' X'developer selected for this example there are five absorbing agents including both active charcoal and ion exchange resins which are wholly successful in removing all the developing agent.
This enables the amplification bath to have a much longer life than would otherwise be the case and reduces the amount of replenishment which is necessary for it, thus increasing the economics of the process. Furthermore, there will be no staining caused by a build-up of any developing agent in the material.
Claims
1. A photographic process in which a photographic material is treated in a developer and subsequently 5 passed to an in-line amplification bath characterized by including the step of treating the amplification bath with an absorbing agent to reduce substantially the amount of developer agent retained in the bath.
10 2. A process as claimed in claim 1 characterized by the absorbing agent is an ion exchange resin.
3. A process as claimed in claim 2 characterized in that the ion exchange resin is cationic.
15
4. A process as claimed in claim 2 characterized in that the ion exchange resin is anionic.
5. A process as claimed in claim 2 characterized in 20 that the ion exchange resin is neutral.
6. A process as claimed in claim 2 characterized in that the ion exchange resin is a mixture of cationic
# and anionic resins.
7. A process as claimed in claim 1 characterized in that absorbing agent is an activated carbon.
8. A process as claimed in claim 7 characterized in that the absorbing agent is activated charcoal.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3-508457A JP3042709B2 (en) | 1991-05-01 | Improvements to the photo process | |
EP91920968A EP0529009B1 (en) | 1990-04-30 | 1991-05-01 | Improvements relating to a photographic process |
DE69101637T DE69101637T2 (en) | 1990-04-30 | 1991-05-01 | IMPROVEMENTS RELATING TO A PHOTOGRAPHIC PROCEDURE. |
AT91920968T ATE104068T1 (en) | 1990-04-30 | 1991-05-01 | IMPROVEMENTS REGARDING A PHOTOGRAPHIC PROCESS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9009678.5 | 1990-04-30 | ||
GB909009678A GB9009678D0 (en) | 1990-04-30 | 1990-04-30 | Improvements relating to a photographic process |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991017479A1 true WO1991017479A1 (en) | 1991-11-14 |
Family
ID=10675227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1991/000845 WO1991017479A1 (en) | 1990-04-30 | 1991-05-01 | Improvements relating to a photographic process |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0529009B1 (en) |
AT (1) | ATE104068T1 (en) |
DE (1) | DE69101637T2 (en) |
GB (1) | GB9009678D0 (en) |
WO (1) | WO1991017479A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0566181A1 (en) * | 1992-04-11 | 1993-10-20 | Kodak Limited | Method of processing photographic material |
GB2305738A (en) * | 1995-09-29 | 1997-04-16 | Kodak Ltd | Processing photographic colour material |
US5702874A (en) * | 1995-09-29 | 1997-12-30 | Eastman Kodak Company | Method of processing photographic silver halide materials |
WO2000038010A1 (en) * | 1998-12-19 | 2000-06-29 | Eastman Kodak Company | Method of producing a photographic image |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1514517A (en) * | 1974-06-20 | 1978-06-14 | Konishiroku Photo Ind | Processing coupler-containing silver halide photographic materials |
US4147546A (en) * | 1976-04-19 | 1979-04-03 | Fuji Photo Film Co., Ltd. | Prevention of fog formation in color photographic process |
EP0128720A2 (en) * | 1983-06-03 | 1984-12-19 | Linkopia Ek För | Method and apparatus for separating and recovering color developing agent |
US4529687A (en) * | 1982-10-07 | 1985-07-16 | Fuji Photo Film Co., Ltd. | Method to form color image |
-
1990
- 1990-04-30 GB GB909009678A patent/GB9009678D0/en active Pending
-
1991
- 1991-05-01 EP EP91920968A patent/EP0529009B1/en not_active Expired - Lifetime
- 1991-05-01 WO PCT/EP1991/000845 patent/WO1991017479A1/en active IP Right Grant
- 1991-05-01 DE DE69101637T patent/DE69101637T2/en not_active Expired - Fee Related
- 1991-05-01 AT AT91920968T patent/ATE104068T1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1514517A (en) * | 1974-06-20 | 1978-06-14 | Konishiroku Photo Ind | Processing coupler-containing silver halide photographic materials |
US4147546A (en) * | 1976-04-19 | 1979-04-03 | Fuji Photo Film Co., Ltd. | Prevention of fog formation in color photographic process |
US4529687A (en) * | 1982-10-07 | 1985-07-16 | Fuji Photo Film Co., Ltd. | Method to form color image |
EP0128720A2 (en) * | 1983-06-03 | 1984-12-19 | Linkopia Ek För | Method and apparatus for separating and recovering color developing agent |
Non-Patent Citations (5)
Title |
---|
DERWENT JAPANESE PATENTS REPORT Vol.80,No.3,15 February 1980 Derwent Publications,Section Chemical,London GB &JP-B-80001571(FUJI PHOTO FILM KK)16-01-1980 * |
JOURNAL OF IMAGING TECHNOLOGY. vol. 10, no. 6, December 1984, SPRINGFIELD US pages 217 - 221; K.L.WAHL ET AL: "RSMP-A modular system for recycling and treatment of photographic effluents" see page 219, column 2 * |
PATENT ABSTRACTS OF JAPAN vol. 1, no. 44 () 27 April 1977, & JP-A-51 140732 (FUJI PHOTO FILM CO.LTD.) 03 December 1976, see the whole document * |
PATENT ABSTRACTS OF JAPAN vol. 2, no. 42 () 20 March 1978, & JP-A-53 008135 (FUJI SHASHIN FILM KK) 25 January 1978, see the whole document * |
SMPTE JOURNAL. vol. 94, no. 6, June 1985, US pages 648 - 653; J.L.BURGER ET AL: "Recovery of Kodak color developing agent CD-2 from process ECP-2A colordeveloper and stop bath." see figures 1, 2 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0566181A1 (en) * | 1992-04-11 | 1993-10-20 | Kodak Limited | Method of processing photographic material |
GB2305738A (en) * | 1995-09-29 | 1997-04-16 | Kodak Ltd | Processing photographic colour material |
US5702874A (en) * | 1995-09-29 | 1997-12-30 | Eastman Kodak Company | Method of processing photographic silver halide materials |
US5756270A (en) * | 1995-09-29 | 1998-05-26 | Eastman Kodak Company | Method of processing a photographic silver halide color material |
GB2305738B (en) * | 1995-09-29 | 1999-05-12 | Kodak Ltd | Method of processing a photographic silver halide colour material |
WO2000038010A1 (en) * | 1998-12-19 | 2000-06-29 | Eastman Kodak Company | Method of producing a photographic image |
Also Published As
Publication number | Publication date |
---|---|
GB9009678D0 (en) | 1990-06-20 |
JPH06507250A (en) | 1994-08-11 |
EP0529009B1 (en) | 1994-04-06 |
EP0529009A1 (en) | 1993-03-03 |
ATE104068T1 (en) | 1994-04-15 |
DE69101637T2 (en) | 1994-09-22 |
DE69101637D1 (en) | 1994-05-11 |
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