GB2205176A - >A method for developing a film - Google Patents

>A method for developing a film Download PDF

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Publication number
GB2205176A
GB2205176A GB08811556A GB8811556A GB2205176A GB 2205176 A GB2205176 A GB 2205176A GB 08811556 A GB08811556 A GB 08811556A GB 8811556 A GB8811556 A GB 8811556A GB 2205176 A GB2205176 A GB 2205176A
Authority
GB
United Kingdom
Prior art keywords
concentration
heavy metals
bath
rinsing liquid
measured
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.)
Granted
Application number
GB08811556A
Other versions
GB2205176B (en
GB8811556D0 (en
Inventor
Steen Juel Nielsen
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.)
Eskofot AS
Original Assignee
Eskofot AS
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 Eskofot AS filed Critical Eskofot AS
Publication of GB8811556D0 publication Critical patent/GB8811556D0/en
Publication of GB2205176A publication Critical patent/GB2205176A/en
Application granted granted Critical
Publication of GB2205176B publication Critical patent/GB2205176B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/02—Details of liquid circulation
    • G03D3/06—Liquid supply; Liquid circulation outside tanks
    • G03D3/065—Liquid supply; Liquid circulation outside tanks replenishment or recovery apparatus
    • 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
    • G03C5/268—Processing baths not provided for elsewhere, e.g. pre-treatment, stop, intermediate or rinse baths

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Description

1 - ll r'. ?1-.1 17 1 2 4 C U 1 13 A METHOD FOR DEVELOPING A FILM The
invention relates to a method for measuring the 10 concentration of heavy ffietals during the z-.evgl.opriert 3f a film passing through a developer bath, a fixer bath and a bath for the rinsing liquid.
DE OS 2.517.423 discloses a method for measuring the concentration of heavy metals in the developer bath to maintain a desired concentration of said heavy metals.
According to the present invention the concentration of heavy metals is measured in the bath for the rinsing liquid, and the bath containing said rinsing liquid is exchanged when the concentration of heavy metals exceeds a predetermined value. It is thus taken into account that heavy metals are possibly carried into the bath for the rinsing liquid.
The concentration of heavy metals is preferably measured by measuring the conductivity of the rinsing liquid. If the rinsing liquid comprises several different heavy metals, the current -voltage - characteristic can be measured.
Alternatively the concentration of heavy metals is measured by measuring the translucence of light in response to the frequency and by comparing the frequency charac- teristic with known reference characteristics. The invention is described An greater detail below and with reference to the drawing illustrating an assembly for developing a film. 35 The assembly of the drawing comprises a developer bath 1, a fixer bath 2, and a bath for the rinsing liquid 3. Furthermore it illustrates a strip of film 4 passing from the developer bath 1 to the fixer bath 2 and then to 2 the bath for the rinsing liquid 3. The rinsing liquid is fed through a passage in a closed circuit with a UV light source killing possibly present germs and chus preventing the formation of algae. It is, however, unavoidable that heavy metals (silver ions) are also carried into the rinsing liquid. It is therefore important to determine when the rinsing liquid is contaminated to such an extent that it can no longer be poured into the public sewerage. The heavy metal contamination of the rinsing liquid is m-.asxlr;-,d by msans cf the conductivity at electrodas 4 and 5 immersed in the bath, as there is a relation between the concentration of heavy metals and the conductivity. The bath for the rinsing liquid is subsequently exchanged when the concentration of heavy metals exceeds a predeter- mined value. The concentration of different heavy metals is measured by means of the current-voltage- characteristic. The ion concentration can alternatively be measured by means of the translucence of light in response to the frequency by obtaining a frequency characteristic and comparing it to known reference characteristics. Furthermore the reflexion in response to the frequency can be measured. A further possibility for measuring the con- 1 1 centiation of heavy metals is the measurement of the sound ref lexion/transmiss ion in response to the frequency. These measuring principles can also be used with liquids other than the rinsing liquid.
The invention thus provides a developer system to be used in locations without faucets and sewerage for the rinsing liquid.
The Figure illustrates the r6llers defining the path of the film through the baths.
The developer assembly may- be varied in many ways without thus deviating from the scope of the invention.
3 A

Claims (8)

1. A method for measuring the concentration of heavy metals during the development of a film passing through a developnr bath, a fixf;r bath and a batl for the rinsing liquid, wherein the concentration of heavy metals is measured in the bath for the rinsing liquid, and the bath containing the rinsing liquid is exchanged when the con- centration of heavy metals exceeds a predetermined value.
2. A method as claimed in claim 1, wherein the concentration of heavy metals is measured by means of the conductivity of the rinsing liquid.
3. A method as claimed in claim 1, wherein the concentration of several heavy metals is measured by means of the current- voltage-characteristic.
4. A method as claimed in claim 1, wherein the concentration of heavy metals is measured by means of the translucence of light in response to the frequency.
5. A method as claimed in claim 1, wherein the concentration of heavy. metals is measured by means of the ultrasound transmission/reflexion in response to the frequency.
6. A method as claimed in claims 3-5, wherein the frequency characteristic is compared to known characteristics.
7. A method substantially as described above-and with reference to the accompanying drawing.
8. An assembly substantially as describ-ed above and with reference to the accompanying drawing.
Published 1988 at The Patent Office, State House, 65/71 High Holborn, London WC111 4TP. Further copies may be obtainedfroln The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent. Con. 1/87.
GB8811556A 1987-05-26 1988-05-16 A method of measuring heavy metal concentration in rinse baths. Expired - Fee Related GB2205176B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK268787A DK268787A (en) 1987-05-26 1987-05-26 PROCEDURE FOR THE DEVELOPMENT OF A MOVIE

Publications (3)

Publication Number Publication Date
GB8811556D0 GB8811556D0 (en) 1988-06-22
GB2205176A true GB2205176A (en) 1988-11-30
GB2205176B GB2205176B (en) 1990-11-14

Family

ID=8114626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8811556A Expired - Fee Related GB2205176B (en) 1987-05-26 1988-05-16 A method of measuring heavy metal concentration in rinse baths.

Country Status (5)

Country Link
JP (1) JPS63303347A (en)
DE (1) DE3816964A1 (en)
DK (1) DK268787A (en)
GB (1) GB2205176B (en)
NL (1) NL8801301A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418757A2 (en) * 1989-09-20 1991-03-27 Fuji Photo Film Co., Ltd. Light-sensitive material processing apparatus
EP0701168A1 (en) * 1994-09-10 1996-03-13 Kodak Limited Photographic processing method and apparatus
EP0742482A1 (en) * 1995-05-04 1996-11-13 Kodak Limited Method of processing black-and-white photographic silver halide materials
EP0933676A1 (en) * 1998-02-03 1999-08-04 Agfa-Gevaert N.V. Processing method of black-and-white photographic materials
US6102589A (en) * 1998-02-03 2000-08-15 Agfa-Gevaert, N.V. Processing method of black-and-white photographic materials

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488193A (en) * 1974-04-22 1977-10-05 Mead Corp Automatic replenishment method and apparatus for photographic processes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56140248A (en) * 1980-04-04 1981-11-02 Hitachi Ltd Concentration measuring equipment using supersonic wave
JPH0685071B2 (en) * 1985-05-13 1994-10-26 コニカ株式会社 Performance of alternative cleaning solution for photographic light-sensitive material Checking method and method for controlling replenishing solution replacement solution for cleaning alternative

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488193A (en) * 1974-04-22 1977-10-05 Mead Corp Automatic replenishment method and apparatus for photographic processes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418757A2 (en) * 1989-09-20 1991-03-27 Fuji Photo Film Co., Ltd. Light-sensitive material processing apparatus
EP0418757A3 (en) * 1989-09-20 1991-12-11 Fuji Photo Film Co., Ltd. Light-sensitive material processing apparatus
EP0701168A1 (en) * 1994-09-10 1996-03-13 Kodak Limited Photographic processing method and apparatus
US5561488A (en) * 1994-09-10 1996-10-01 Eastman Kodak Company Photographic processing method and apparatus
EP0742482A1 (en) * 1995-05-04 1996-11-13 Kodak Limited Method of processing black-and-white photographic silver halide materials
EP0933676A1 (en) * 1998-02-03 1999-08-04 Agfa-Gevaert N.V. Processing method of black-and-white photographic materials
US6102589A (en) * 1998-02-03 2000-08-15 Agfa-Gevaert, N.V. Processing method of black-and-white photographic materials

Also Published As

Publication number Publication date
DE3816964A1 (en) 1988-12-08
DK268787A (en) 1988-11-27
JPS63303347A (en) 1988-12-09
DK268787D0 (en) 1987-05-26
NL8801301A (en) 1988-12-16
GB2205176B (en) 1990-11-14
GB8811556D0 (en) 1988-06-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970516