GB1313796A - Photographic processing - Google Patents

Photographic processing

Info

Publication number
GB1313796A
GB1313796A GB1313796DA GB1313796A GB 1313796 A GB1313796 A GB 1313796A GB 1313796D A GB1313796D A GB 1313796DA GB 1313796 A GB1313796 A GB 1313796A
Authority
GB
United Kingdom
Prior art keywords
developer
halide
replenisher
halide ion
ion concentration
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.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IPC SERVICES Ltd
Original Assignee
IPC SERVICES Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IPC SERVICES Ltd filed Critical IPC SERVICES Ltd
Publication of GB1313796A publication Critical patent/GB1313796A/en
Expired legal-status Critical Current

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
    • G03C5/29—Development processes or agents therefor
    • G03C5/31—Regeneration; Replenishers

Abstract

1313796 Replenishing photographic silver halide developers. Automatic control of proportion I P C SERVICES Ltd 19 April 1971 [20 April 1970] 18830/70 Headings G2A G2C and G3R A photographic silver halide developer solution is replenished to correct (i) decrease in unoxidized developing agent concentration and an increase in halide ion concentration due to the development of silver halide materials, and (ii) decrease in unoxidized developing agent concentration due to aerial oxidation, by using two developer replenisher solutions having different halide ion concentrations. In the Fig., a developer sample drawn from the development tank 1 by a sampling pump 6 is sensed for the state of oxidation of the developing agent by the redox electrode 5 and for halide ion concentration by the halide sensor electrode 11. The halide electrode 11 controls addition by pump 17 of the first replenisher solution which preferably contains fresh (unoxidized) developer solution and has zero halide ion concentration. The redox electrode 5 controls addition by pump 16 of the second replenisher solution which preferably contains fresh developer and has a halide ion concentration equal to the desired concentration in the developer. A time switch 19 allows the system to be operated at selected time intervals and an electronic or mechanical logic device may prevent addition of the second replenisher when the addition of the first replenisher is required.
GB1313796D 1970-04-20 1970-04-20 Photographic processing Expired GB1313796A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1883070 1970-04-20

Publications (1)

Publication Number Publication Date
GB1313796A true GB1313796A (en) 1973-04-18

Family

ID=10119149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1313796D Expired GB1313796A (en) 1970-04-20 1970-04-20 Photographic processing

Country Status (4)

Country Link
BE (1) BE765994A (en)
DE (1) DE2119069A1 (en)
FR (1) FR2089924A5 (en)
GB (1) GB1313796A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081280A (en) * 1975-02-27 1978-03-28 Agfa-Gevaert N.V. Processing of photographic silver halide materials
US4228234A (en) * 1977-01-28 1980-10-14 Fuji Photo Film Co., Ltd. Method for maintaining the development activity of a photographic lithographic developer constant
US4245034A (en) * 1978-01-17 1981-01-13 Ciba-Geigy Ag Method and apparatus for regenerating photographic processing solution
WO1992009009A1 (en) * 1990-11-14 1992-05-29 Kodak Limited Method of processing a photographic silver halide colour material
EP0660175A2 (en) * 1993-12-22 1995-06-28 E.I. Du Pont De Nemours And Company Control of replanishment during photographic development
US5541027A (en) * 1993-02-24 1996-07-30 E. I. Du Pont De Nemours And Comapny Method for determining the proper replenishment for a developing solution
US5670303A (en) * 1994-10-21 1997-09-23 Eastman Kodak Company Method and apparatus for altering the pH of a photographic developing solution
FR2798467A1 (en) * 1999-09-13 2001-03-16 Eastman Kodak Co DEVICE FOR AUTOMATICALLY MEASURING THE CONCENTRATION OF A DEVELOPING AGENT

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343242C2 (en) * 1972-08-31 1982-06-16 E.I. du Pont de Nemours and Co., 19898 Wilmington, Del. Process for developing exposed lithographic recording material
EP0552511A1 (en) * 1992-01-20 1993-07-28 Agfa-Gevaert N.V. Method for controlling the PH of an ascorbic acid type developer
EP0752618A3 (en) * 1995-06-12 1997-01-22 E.I. Du Pont De Nemours And Company Hydroquinone developer, method for recycling spent hydroquinone developer and a recycled hydroquinone developer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081280A (en) * 1975-02-27 1978-03-28 Agfa-Gevaert N.V. Processing of photographic silver halide materials
US4228234A (en) * 1977-01-28 1980-10-14 Fuji Photo Film Co., Ltd. Method for maintaining the development activity of a photographic lithographic developer constant
US4245034A (en) * 1978-01-17 1981-01-13 Ciba-Geigy Ag Method and apparatus for regenerating photographic processing solution
WO1992009009A1 (en) * 1990-11-14 1992-05-29 Kodak Limited Method of processing a photographic silver halide colour material
US5380627A (en) * 1990-11-14 1995-01-10 Eastman Kodak Company Method of processing a photographic silver halide color material utilizing a processing tank having a barrier
US5541027A (en) * 1993-02-24 1996-07-30 E. I. Du Pont De Nemours And Comapny Method for determining the proper replenishment for a developing solution
EP0660175A2 (en) * 1993-12-22 1995-06-28 E.I. Du Pont De Nemours And Company Control of replanishment during photographic development
EP0660175A3 (en) * 1993-12-22 1995-12-06 Du Pont Control of replanishment during photographic development.
US5670303A (en) * 1994-10-21 1997-09-23 Eastman Kodak Company Method and apparatus for altering the pH of a photographic developing solution
FR2798467A1 (en) * 1999-09-13 2001-03-16 Eastman Kodak Co DEVICE FOR AUTOMATICALLY MEASURING THE CONCENTRATION OF A DEVELOPING AGENT
EP1085321A1 (en) * 1999-09-13 2001-03-21 Eastman Kodak Company Device for the automatic measurement of developing agent concentration

Also Published As

Publication number Publication date
BE765994A (en) 1971-09-16
DE2119069A1 (en) 1971-11-04
FR2089924A5 (en) 1972-01-07

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees