EP0598145A1 - Verfahren zur Verarbeitung von bildmässig belichtetem, photographischem Silberhalogenidmaterial - Google Patents

Verfahren zur Verarbeitung von bildmässig belichtetem, photographischem Silberhalogenidmaterial Download PDF

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Publication number
EP0598145A1
EP0598145A1 EP92203450A EP92203450A EP0598145A1 EP 0598145 A1 EP0598145 A1 EP 0598145A1 EP 92203450 A EP92203450 A EP 92203450A EP 92203450 A EP92203450 A EP 92203450A EP 0598145 A1 EP0598145 A1 EP 0598145A1
Authority
EP
European Patent Office
Prior art keywords
tank
fixer
silver
fixing
station
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Withdrawn
Application number
EP92203450A
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English (en)
French (fr)
Inventor
Karel Brems
Henri Olbrechts
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Priority to EP92203450A priority Critical patent/EP0598145A1/de
Publication of EP0598145A1 publication Critical patent/EP0598145A1/de
Withdrawn legal-status Critical Current

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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
    • G03C5/38—Fixing; Developing-fixing; Hardening-fixing

Definitions

  • the present invention relates to a method for processing an imagewise exposed photographic silver halide material.
  • the processing of conventional photographic silver halide material comprises among others the steps of developing, fixing and rinsing.
  • the purpose of fixing is to remove silver halide from the film.
  • This silver halide can be the non developed halide in a black-and-white material or all halide in a colour material when the image is built up by dyes.
  • Film processing can be done in a very small processing device like a minilab or a small microfilm processor but in a huge processing machine as well like a film processor for motion picture print film running at a film speed of 15,000 m/h and more.
  • the present invention relates in particular to the processing of motion picture print film but its scope extends to smaller scale photographic film or paper-processing devices as well.
  • a method for processing imagewise exposed photographic silver halide material by conveying it in succession through at least a developing, a fixing and a rinsing station, wherein :
  • the method according to the present invention does not remove all of the silver from the effluent water. This means that at those instances where environment considerations are less stringent, the rinsing water may directly flow to the sewer. However, when more stringent regulations control effluent water, it is required to remove silver from the rinsing water to a degree up to, e.g., 1 ppm by means of ion-exchange resins.
  • ion-exchange resins now have to remove much less silver from the rinsing than the usual devices, results in their operation to become easier, less costly, and their capacity to become smaller, which leads to important savings in installation costs.
  • Preferred embodiments of the method according to the invention are as follows.
  • the capacity of the first tank of the fixing station is such that the photographic material is fixed for 100 % in said first tank.
  • the liquid contents of the last tank of the fixing station is considerably smaller than that of the first tank, and suitably even less than one third of that of the first tank.
  • Silver is recovered from fixer overflowing said first tank.
  • the silver recovery of fixer overflowing said first tank is done in a buffer tank.
  • a replenishment arrangement is provided for replenishing fixer carried off by the photographic material from the fixing station.
  • the invention includes also a modified method for attaining the claimed object.
  • a method for processing imagewise exposed photographic silver halide material by conveying it in successsion through at least a developing, a fixing and a rinsing station is characterised in that
  • said concentrated fixer chemicals are added in solid form.
  • this system comprises the successive operations of conveying a film through a bath for removal of the back layer of the film, a (colour) development bath, a stop bath, a rinsing bath, a first fixing bath, a rinsing bath, a bleach bath, a rinsing bath, a sound-track development, a rinsing bath, a second fixing bath, a final rinsing bath, a stabilisation bath, and lastly a drier.
  • a bath for removal of the back layer of the film e.g. to the regular so-called ECP II process
  • this system comprises the successive operations of conveying a film through a bath for removal of the back layer of the film, a (colour) development bath, a stop bath, a rinsing bath, a first fixing bath, a rinsing bath, a bleach bath, a rinsing bath, a sound-track development, a rinsing bath, a second fixing bath,
  • the method according to the invention can be used for the two fixing operations of the described process.
  • a fixing station of an installation for processing an imagewise exposed photographic material This installation may in its simplest form comprise a developing, a fixing and a rinsing station, but may as well be a more complex arrangement as described hereinbefore.
  • the fixing station which is generally designated by numeral 10 comprises a first tank 12 and a second one 13.
  • the capacity of tank 13 can range between half and one third of that of tank 12.
  • Tank 13 has an overflow opening 14 determining the liquid level 15 in said tank in normal operation.
  • Fixer flows via overflow 14 in tank 12, as indicated generally by arrow 9.
  • the fixer level 16 of tank 12 is determined by an overflow opening 17 disposed lower than overflow 14.
  • Arrow 18 indicates the general transport direction of a film through the station.
  • a film is entering tank 12 via a driven pressure roller pair (not shown), is squeezed by another driven roller pair upon leaving tank 12 and entering tank 13, and is squeezed by still another roller pair upon leaving tank 13 and entering the rinsing station.
  • Silver from the fixer in tank 12 is continuously recovered by an installation 19, which also may also comprise pump means for maintaining a continuous circulation of fixer in tank 12.
  • Liquid overflowing opening 17 passes through a buffer tank 20 which is coupled with a recovery installation for recovery of silver from fixer overflowing tank 12.
  • Fixer from buffer tank 20 is pumped into tank 13 near the film outlet thereof and in that way functions to replenish said second tank.
  • the overflow of the second tank functions as replenisher for the first tank.
  • the silver concentration is mostly kept at 0.5 - 1.0 g of Ag+/l.
  • the silver content in the second tank can easily be kept at 0.05 g of Ag+/l so that carry-over losses of Ag+ to the rinsing station are reduced by a factor 10 to 20.
  • the amount of silver to be recovered in the second tank depends on three factors : silver content of the film, silver concentration in the first tank and carry-over volume.
  • Fig.2 shows a fixing installation 10 wherein each of two tanks 12 and 13 comprises its own silver recovery device. viz. 21 and 22.
  • the overflows 14 and 17 of both tanks are the same as those shown in Fig.1.
  • the overflow of the first tank is used as replenisher for the second tank.
  • both embodiments described hereinbefore will comprise metering systems 23 and 24 for adding fixer chemicals to the system in response to the amount of processed film in order to keep the fixer concentration at a reasonably constant level.
  • Fig.3 illustrates an embodiment of a fixing station with two tanks 12 and 13 in which no overflow system is used.
  • the embodiment is intended for use with a complex motion-picture film-processing system as described hereinbefore wherein the fixing station is preceeded by a rinsing station and in consequence fixer in the first tank 12 is constantly diluted via carry-over of water from the preceeding rinsing tank.
  • fixer is constantly removed from the first tank by carry-over to the second one.
  • the dilution of fixer in the first tank is compensated by replenishment of fixer chemicals from a supply 25 in response to the amount of processed film. Such replenishment preferably occurs with solid chemicals.
  • Silver-recovery devices 26 and 27 reduce the silver content of the fixer in both tanks to the desired level.
  • the number of tanks for the fixing station is not limited to two, but can comprise three or even more tanks. This does not change anything to the principle of countercurrent fixing as explained with reference to Figs. 1 and 2, or to the overflow-free arrangement shown in Fig.3.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
EP92203450A 1992-11-10 1992-11-10 Verfahren zur Verarbeitung von bildmässig belichtetem, photographischem Silberhalogenidmaterial Withdrawn EP0598145A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92203450A EP0598145A1 (de) 1992-11-10 1992-11-10 Verfahren zur Verarbeitung von bildmässig belichtetem, photographischem Silberhalogenidmaterial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92203450A EP0598145A1 (de) 1992-11-10 1992-11-10 Verfahren zur Verarbeitung von bildmässig belichtetem, photographischem Silberhalogenidmaterial

Publications (1)

Publication Number Publication Date
EP0598145A1 true EP0598145A1 (de) 1994-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92203450A Withdrawn EP0598145A1 (de) 1992-11-10 1992-11-10 Verfahren zur Verarbeitung von bildmässig belichtetem, photographischem Silberhalogenidmaterial

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EP (1) EP0598145A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844524A1 (de) * 1996-11-25 1998-05-27 Agfa-Gevaert N.V. Verfahren zur Verarbeitung von photographischem Material
US9394584B2 (en) 2013-12-03 2016-07-19 Tetra Recycling, Inc. Method of recovering silver and paper from silver-coated paper film

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219841A2 (de) * 1985-10-18 1987-04-29 Fuji Photo Film Co., Ltd. Verfahren zur Behandlung farbphotographischer Silberhalogenidmaterialien
JPS62123463A (ja) * 1985-11-22 1987-06-04 Konishiroku Photo Ind Co Ltd ハロゲン化銀カラ−写真感光材料の処理方法
WO1991015806A1 (en) * 1990-04-02 1991-10-17 Eastman Kodak Company Processing process for photographic materials
JPH046291A (ja) * 1990-04-20 1992-01-10 Konica Corp 銀回収方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219841A2 (de) * 1985-10-18 1987-04-29 Fuji Photo Film Co., Ltd. Verfahren zur Behandlung farbphotographischer Silberhalogenidmaterialien
JPS62123463A (ja) * 1985-11-22 1987-06-04 Konishiroku Photo Ind Co Ltd ハロゲン化銀カラ−写真感光材料の処理方法
WO1991015806A1 (en) * 1990-04-02 1991-10-17 Eastman Kodak Company Processing process for photographic materials
JPH046291A (ja) * 1990-04-20 1992-01-10 Konica Corp 銀回収方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 47, no. 7, 10 April 1953, Columbus, Ohio, US; CRABTREE ET AL. 'Two-bath fixation of prints' column 3158 ; *
DATABASE WPIL Section Ch, Week 9208, February 1992 Derwent Publications Ltd., London, GB; Class G06, AN 92-061114 & JP-A-4 006 291 (KONICA CORP) 10 January 1992 *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 340 (P-634)7 November 1987 & JP-A-62 123 463 ( KONISHIROKU PHOTO IND CO LTD ) 4 June 1987 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844524A1 (de) * 1996-11-25 1998-05-27 Agfa-Gevaert N.V. Verfahren zur Verarbeitung von photographischem Material
US9394584B2 (en) 2013-12-03 2016-07-19 Tetra Recycling, Inc. Method of recovering silver and paper from silver-coated paper film

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