EP0596991B1 - Ameliorations relatives aux traitements photographiques - Google Patents

Ameliorations relatives aux traitements photographiques Download PDF

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Publication number
EP0596991B1
EP0596991B1 EP92916658A EP92916658A EP0596991B1 EP 0596991 B1 EP0596991 B1 EP 0596991B1 EP 92916658 A EP92916658 A EP 92916658A EP 92916658 A EP92916658 A EP 92916658A EP 0596991 B1 EP0596991 B1 EP 0596991B1
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EP
European Patent Office
Prior art keywords
image
film
signal
processing
transmittance
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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 - Lifetime
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EP92916658A
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German (de)
English (en)
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EP0596991A1 (fr
Inventor
Christopher Barrie C/O Kodak Limited Rider
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Kodak Ltd
Eastman Kodak Co
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Kodak Ltd
Eastman Kodak Co
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Publication of EP0596991A1 publication Critical patent/EP0596991A1/fr
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Anticipated expiration legal-status Critical
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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
    • G03C5/29—Development processes or agents therefor
    • G03C5/31—Regeneration; Replenishers
    • 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
    • G03C5/3958—Replenishment processes or compositions, i.e. addition of useful photographic processing agents
    • 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
    • G03C7/44—Regeneration; Replenishers
    • 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
    • G03C2200/00—Details
    • G03C2200/57—Replenishment rate or conditions

Definitions

  • This invention relates to improvements in or relating to photographic processing.
  • control strips are normally used at regular intervals. These strips are pieces of film exposed in a well-defined manner by the manufacturers. After processing, the optical density of the strips is measured using a densitometer and compared with the aim values. If the measured densities fall outside the control limits, appropriate action may be taken by the operator to bring the processor back to aim.
  • the scanner has the prime function of measuring the transmittance of the film image to be printed.
  • the scanner may have just one pixel in which case the average transmittance over the whole image is obtained, or it may have many pixels, yielding a more detailed profile of the transmittance of the image at many points.
  • the scan will normally be in three colours for colour materials. From the scan data and stored sensitometric data relating to the print material, the printer calculates the exposure needed to form a correctly balanced copy of the film image.
  • a scanner may be attached to the output end of black-and-white processors, especially for X-ray film, so that the density of developed silver may be measured and process control performed on the basis of a knowledge of the actual amount of silver produced after development.
  • Minilabs are small scale processing laboratories where the printer and paper processor are linked together in one unit with a separate film processor. More recently products have appeared where the film processor, printer and paper processor are integrated into one compact unit. As the machines become smaller, so solution volumes decrease and the possibility for errors in the assumption that all films are exposed to the average value increases. This leads to an increased likelihood that the process will diverge from aim values.
  • Development is a good example of the first type of chemical reaction, and can be referred to as being "image-dependent".
  • the amount of developer molecules used up in processing a piece of photographic material is related to the amount of latent image formed on it for given development conditions.
  • Another example of an "image-dependent" chemical reaction is the bleaching process.
  • Fixing is an example of an "image-independent" chemical reaction in colour photographic systems. All the silver in the photographic material is removed in a fixer bath and this amount is essentially the same regardless of the amount of exposure given to the material.
  • fixing is an image-dependent process in that the amount of undeveloped silver to be removed from the film by fixing is related to the amount of developed silver which remains. Unless otherwise stated, all subsequent discussion and examples will refer to the colour photographic process.
  • the replenishment of chemicals which are depleted in a reaction which is "image-independent" may be accomplished by a measure of the area of the photographic material being processed. This is the case with fixers where all the silver is removed from the material and reacts with a fixing agent, for example sodium thiosulphate. Replenishment of the fixing agent in the fixer solution, is easily achieved by knowing what area of film or paper has been processed and the amount of silver per unit area of the material being processed. This technique is well-known in the industry and has been used for a long time.
  • EP-A-0 381 502 describes a method of using scan data from a photofinishing printer to control the replenishment rate of the paper processor.
  • the actual exposure given to the paper is inferred from measurements and the amount of depletion of the chemicals in processing the exposed paper is calculated. Exact replenishment of the depleted chemicals may then be effected.
  • This technique does not require the use of sensors in the processor, except for currently measured variables such as temperature and time. It also overcomes the problems of small processing solution volumes as described above.
  • EP-A-0 596 994 An extension of this concept is described in our published copending patent application EP-A-0 596 994.
  • EP-A-0 596 994 a technique for controlling the subsystems employed for removing by-products from the processing reactions in photographic processors is disclosed.
  • An example is given in which halide ions, released in proportion to the amount of silver developed on the film by the developer solution, may be calculated from a knowledge of the actual exposure given to the paper. From this calculation exact control of the subsystem for removing halide ions from the developer may be effected, thus maintaining a constant level of halide ions in the developer and hence maintaining the solution activity.
  • a method of controlling the chemical activity of processing solutions used in photographic processing apparatus comprising a film processing stage in which an exposed photographic film is processed and a subsequent second stage including measuring means for measuring the optical transmittance of an image on the film, the method including the step of measuring the transmittance of the image, and using the measured transmittance information for converting the image into a desired format in that subsequent second stage, characterized in that the measured transmittance information is also used for controlling the removal of image-dependent by-products in the preceding film processing stage and its attached subsystems.
  • converting the image into a desired format refers to any process in which the image on the film is either reproduced on to a hard copy display medium, eg. photographic or thermal paper; or an electronic display means, such as, a cathode ray tube or a liquid crystal device; or sampled to enable the image to be stored in a storage device, eg. magnetic, electronic or optical storage media, or transmitted to a remote location.
  • a hard copy display medium eg. photographic or thermal paper
  • an electronic display means such as, a cathode ray tube or a liquid crystal device
  • sampled to enable the image to be stored in a storage device eg. magnetic, electronic or optical storage media, or transmitted to a remote location.
  • the present invention takes the data which is already available from the printer scanner for exposure determination purposes and uses it for another purpose, namely: the control of the replenishment of chemicals in the film processor.
  • a colour photographic material has three image forming layers: the cyan, magenta and yellow. These absorb light from the red, green and blue parts of the spectrum respectively.
  • the amounts of cyan, magenta and yellow dye present in a piece of colour film are linearly related to the logarithm of the transmittance (ie the optical density) of the film to red, green and blue light respectively.
  • the photographic industry has used standardized equipment to measure the red, green and blue densities (status densitometry) of film for various applications including process control and exposure determination. Although there are small differences between the spectral transmittance of the dyes in different manufacturers' films, they are essentially the same, so that any manufacturer's film will print on any manufacturer's paper.
  • a measurement of the three primary colour densities of a patch of film will yield information relating to the image dye amounts on the patch of film.
  • negative films usually include masking dyes as well as image dyes.
  • the effect of non-image dyes may be easily corrected for by measuring, as well as the patch of film in question, the status densities of a patch of unexposed but processed film.
  • the densities so measured may be used to correct the measurements of the exposed processed film to yield information relating to the image dye amounts.
  • the primary colour densities of the unexposed processed film may vary slightly from manufacturer to manufacturer and may therefore need to be measured separately for all films to be processed. This is not a great problem, however, since it is current practice to print different manufacturer's films with slightly different settings, the relevant information being stored in the printer.
  • Developing agents such as the family of paraphenylenediamine molecules commonly used in colour photographic processing, are an example of image-dependent chemistry, and it is desirable to replenish the developer according to how much has been used up in forming the dye.
  • developer agents or simply "developers” as they are commonly known
  • the amount of developer which must have been used up can be calculated from a knowledge of the dye amounts formed on the film.
  • the film scanner in the printer measures transmittance, in three colours. These measurements depend on the spectral output of the light source as well as the spectral sensitivity of the photodetectors used to effect the measurements.
  • the measured transmittance in each of the three colours, red, green and blue are known as printing densities and are described fully in Chapter 18 of "The theory of the photographic process" published by Macmillan, 4th edition. As described in this reference, printing densities are related to analytical spectral densities by a matrix equation which requires the knowledge of several constants which may be determined by the method described in chapter 18. Analytical densities may then be linearly related to dye amounts in the developed film.
  • the procedure is exactly the same as that described in EP-A-0 381 502 for calculating the amount of developer used up to produce the dye amounts. In essence this involves calculating a correction to the manufacturer's recommended average replenishment rate per unit area of film processed, according to the difference from average of the dye amounts on the film.
  • a relationship between the measured printing densities and the replenishment of the developer More specifically and more usefully, a relationship between the difference in printing density from average and the correction to the average replenishment rate for the developer may be derived.
  • a variant on the technique described in the above example is to replenish once after a batch of prints have been made. For example, it may be appropriate to replenish the developer based on a calculation of the dye amounts present in twelve images on the film. Thus, for every 36-exposure film, three replenishment calculations would be performed and the correct replenishment effected. Equally, it may be appropriate to replenish after several films have been developed based on the sum of the dyes present in the films.
  • the determining factor in deciding how often to replenish is the volume of developer present in the film processor. For large volumes it would be appropriate to replenish less often and vice versa.
  • Another variant on the present invention is to use a combination of replenishment-by-area and replenishment by calculation.
  • the film processor would normally replenish by area of film processed until instructed to make a correction by the printer. For example, when the printer had, based on calculation of dye amounts present in the film, accumulated a correction to the normal replenishment rate greater than a threshold level, it would signal to the film processor using a data link, the amount of the correction which needed to be made. This would then be effected at the next replenishment time by adding the correction (either a positive or negative amount) to the usual amount of replenisher dispensed by the replenisher system.
  • a further small correction may need to be made in the example of replenishing the developer arising from the fact that image dyes are not only present on the image area of the film. Some dye may be produced in the non-image area due to chemical or optical fogging. This is normally so low that the amount would be completely negligible. It may, however, be brought into the calculation by assuming an average fog level and by calculating the amount of dye which would be produced on the non-image areas of the film on an area basis. This avoids the need to explicitly measure the fog level on each film but may lead to errors in cases where films have been severely fogged.
  • the film scanner may be configured to overscan the image area of the film such that a measure of the actual fog level is obtained.
  • This can be used together with a knowledge of the total area of film which has been processed to infer the actual amount of dye produced in the non-image areas.
  • the scanner would scan the whole of the film, not just the image areas. It can easily happen that the front or back ends of the film have complete optical fogging due the process of loading the film into the camera. Equally, cameras are occasionally opened by mistake, fogging a section of the film. These events can be fully corrected for if the whole film is scanned.
  • a variant on the above example, which does not require the scanner to overscan the image area, is to use the scanner to measure the unexposed region between images on the film while the film is being moved from one image to another. A good estimate of the fog level in that region on the film may then be determined. Similarly, it is possible to extend this technique to measure the leading and trailing ends of the film while in motion so that the area of totally fogged film due to camera loading or unloading operations may be estimated. This information, together with the image scan data, will provide all that is necessary for a good estimation of the total dye present on the film in both image and non-image areas, yet without the extra expense of configuring the scanner to overscan the images.
  • a further advantage is in the correct replenishment of films which have been exposed in a significantly different manner than usual, for example, totally fogged films where considerably more dye than usual is formed and unexposed films where considerably less is formed.
  • a yet further advantage is that no extra hardware, save for a link between the printer and the film processor for data transmission, need be provided in that the printer is already equipped with a film scanner which is able to produce the required measurements.
  • the present invention would be particularly advantageous in an integrated photofinishing machine where film processor, printer and paper processor are built into the same casing. There is no reason, however, why the invention should not be used in a conventional minilab by providing a link between the film processor and the printer through which the scan data could be transmitted.
  • the above example demonstrates that the present invention can be used to control the removal of image-dependent by-products of the processing reactions or the replenishment of the subsystems which remove image-dependent by-products from the solutions.
  • halide ions are produced in the developer as a by-product of the development reaction.
  • the quantity of halide ions produced is equal to the amount of silver ions reduced to atomic silver in the developer which is, in turn, related to the amount of dye formed (in colour materials). Since halide ions act as a restrainer for the development reaction, it is desired to keep their concentration at a predetermined level so as to maintain constant processing solution activity.
  • the processing apparatus incorporates a subsystem which has the ability of removing halide ions from the processing solution, the ions being removed by passing the processing solution over a coated substrate to which the halide ions bind very strongly.
  • the reaction kinetics are sufficiently fast so that the halide ions are bound to the substrate much faster than they are produced in the developer.
  • the volume of liquid, v can be calculated for which h moles of halide ions are present and where the total solution volume before development is V.
  • halide concentration in the developer may be kept constant.
  • H, V and c are known constants and h may be calculated from a knowledge of the dye amounts formed on the film, and hence v may be calculated.
  • a flow controller may be operated to dispense v litres of liquid into the halide removal system. This example demonstrates how printer scan information can be used to control the operation of a removal system in the film processor.
  • h is a function of the exposure given to the material, and may be determined form the sensitometric data relating to the film which is stored in the processing apparatus. Specifically, the relation between exposure and developed silver would be used, since the number of halide ions released into the developer solution is identical to the number of silver ions developed to form metallic silver.
  • the operator may be automatically alerted when action needs to be taken to change or replenish a removal system cartridge.
  • the method according to the present invention is applicable to any removal system used in photographic processing apparatus whether it be based on chemical binding, as above, or ionic replacement as in ion-exchange columns and silver recovery cartridges or any other method where an element of the system is either exhausted or needs replenishing with reagent.
  • This method has the advantage that an indication can be given to an operator when a removal system is nearly exhausted. This enables maintenance to be carried out at the right time and without the need for routine measurements by the operator. Sometimes it is very difficult for an unskilled operator to make these measurements especially where they are concerned with effluent discharge limits which may be very low.
  • Another advantage of this method is that automatic replenishment of the consumable components of the removal systems may be achieved such that the removal efficiency of the systems is maintained at a constant level.
  • a liquid reagent which reacts strongly with the halide ions may have been chosen to cause the ions to precipitate out of the solution as an alternative to using a solid substrate to which the halide ions bind.
  • the removal system may comprise a separate reaction vessel in which known amounts of developer solution are added to the liquid reagent. It is clear that the liquid reagent would need replenishing from time to time in order to keep its activity high. This replenishment could be controlled by knowing the amount of reagent used up in removing the halide ions. This amount is related to the amount of halide ions to be removed which, in turn, may be calculated from the amount of exposure given to the photographic material which released the halide ions.
  • the liquid reagent is the consumable component of the removal system.
  • the present invention may also be used to control the replenishment of the removal system itself.
  • the present invention can be used to predict exhaustion of the removal system and provide a signal to alert an operator or an automatic system to take the necessary maintenance actions.
  • the signal may cause an actuator to switch the liquid flow from a nearly-exhausted removal system to a fully replenished system connected in parallel.
  • control of the concentration of components of the process produced as by-products of chemical reactions which are image-related can be provided without the need for chemical sensors being present in the processing solution.
  • the method of the present invention makes process and environmental control possible for the first time.
  • replenishment control will usually be implemented as making a correction to the average amount of replenisher dispensed per unit area of film processed, the average being determined by manufacturer's recommendations.
  • the average will normally be such as to correct on average for the errors introduced by low-resolution scanning and in any case such errors represent a small second order correction.
  • Another possible application of the present invention concerns the use of scanners for different display media other than photographic prints. For example, some customers of photofinishing laboratories may prefer not to have a set of photographic copies of their film images on paper but stored on an optical or magnetic storage device for subsequent electronic display on a television monitor. Journalists also may not require hard copy of their film images but may prefer to scan their images and transmit them electronically to another location. In these two examples, the image would still need to be scanned just as in a photographic printer. Thus the present invention would still apply, in that the measured transmittance data from the images could be used to calculate the amount of image producing substances on the image for the purpose of controlling the replenishment of chemical species in the film processor.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)

Abstract

Dans un appareil de traitement photographique, il est nécessaire de régénérer les solutions de traitement au fur et à mesure de leur épuisement. La technique connue consiste à régénérer les produits chimiques dans un processeur de papier en déterminant la quantité d'exposition que subit le papier pendant l'étape d'impression de l'appareil, lors de la copie sur papier photographique d'une image sur une bande de pellicule, et en utilisant cette valeur pour calculer la quantité d'agent de régénération requis pour compenser exactement les produits chimiques épuisés lors du traitement de ladite image. On décrit un procédé d'utilisation des données relatives au facteur de transmission optique mesuré d'une image sur une bande de pellicule pendant l'étape d'impression pour réguler aussi bien la régénération des solutions de traitement pendant l'étape de traitement de la pellicule dans l'appareil, que l'élimination de produits dérivés dépendants de l'image formés pendant le traitement de ladite bande de pellicule.

Claims (21)

  1. Procédé de régulation de l'activité chimique de solutions de traitement utilisées dans un appareil de traitement photographique, l'appareil comprenant une étape de traitement du film dans laquelle un film photographique exposé est traité et une seconde étape subséquente comprenant des moyens de mesure pour mesurer la transmittance optique d'une image sur le film, le procédé comprenant l'étape de mesure de la transmittance de l'image, et l'utilisation de l'information de transmittance mesurée pour transformer l'image en un format désiré dans cette seconde étape subséquente, caractérisé en ce que l'information de transmittance mesurée est également utilisée pour réguler la séparation de sous-produits dépendant de l'image dans l'étape précédente de traitement du film et les sous-systèmes qui y sont liés.
  2. Procédé selon la revendication 1, dans lequel un signal directement lié à la quantité de substances formant l'image sur l'image à transformer est dérivé de la transmittance mesurée et utilisé pour calculer la quantité de sous-produits formés pendant le traitement de l'image à transformer.
  3. Procédé selon la revendication 1 ou 2, dans lequel les sous-produits sont des ions.
  4. Procédé selon la revendication 3, dans lequel les ions sont des ions halogénures.
  5. Procédé selon la revendication 1 ou 2, dans lequel les sous-produits sont des molécules.
  6. Procédé selon la revendication 5, dans lequel les molécules sont des molécules de développateur oxydé.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel la séparation des sous-produits est effectuée en utilisant un système de séparation dans lequel le signal est utilisé pour réguler la régénération des composants consommables du système.
  8. Procédé selon la revendication 7, dans lequel le signal est utilisé pour calculer le degré d'épuisement des composants consommables.
  9. Procédé selon la revendication 8, dans lequel le degré calculé est utilisé pour émettre un signal pour indiquer que les composants consommables sont presque épuisés.
  10. Procédé selon la revendication 9, dans lequel le signal indiquant que l'épuisement est presque atteint est utilisé pour dévier la circulation de liquide du système presque épuisé à un autre système de séparation totalement régénéré disposé en parallèle.
  11. Procédé selon l'une quelconque des revendications 2 à 10, dans lequel le signal est dérivé de mesures de la transmittance moyenne de l'image à transformer.
  12. Procédé selon l'une quelconque des revendications 2 à 10, dans lequel le signal est dérivé de mesures de la transmittance moyenne de plusieurs petites surfaces différentes de l'image à transformer.
  13. Procédé selon la revendication 11 ou 12, dans lequel le signal est dérivé de la somme de mesures d'un lot d'images à transformer.
  14. Procédé selon l'une quelconque des revendications 2 à 10, dans lequel le signal est en outre dérivé de données concernant les caractéristiques sensitométriques du film.
  15. Procédé selon la revendication 2, dans lequel le signal est relié par une fonction empirique à la quantité de sous-produits à séparer.
  16. Procédé selon la revendication 2, dans lequel le signal est encore dérivé en utilisant une fonction empirique.
  17. Appareil de traitement photographique comprenant une étape de traitement du film dans laquelle un film photographique exposé est traité, une seconde étape subséquente contenant des moyens de mesure pour mesurer la transmittance optique d'une image sur le film et des moyens de conversion pour transformer l'image en un format désiré, caractérisé en ce que l'appareil comprend en outre des moyens de séparation par lesquels on fait passer la solution de traitement provenant de l'étape de traitement du film et ensuite on la renvoie à celle-ci, afin de séparer les sous-produits dépendant de l'image qui sont produits pendant le traitement du film, un signal relié à la transmittance mesurée de l'image à transformer étant utilisé pour commander les moyens de séparation.
  18. Appareil selon la revendication 17, dans lequel le signal est utilisé pour commander la régénération des composants consommables des moyens de séparation.
  19. Appareil selon la revendication 17, dans lequel le signal est utilisé pour prévoir l'épuisement des moyens de séparation.
  20. Appareil selon la revendication 18 ou 19, dans lequel le signal est utilisé pour dévier la circulation de liquide d'une unité presque épuisée à une unité totalement régénérée dans les moyens de séparation.
  21. Appareil selon l'une quelconque des revendications 17 à 20, dans lequel le signal est transmis à l'étape de traitement du film par une liaison directe de transmission de données depuis la seconde étape.
EP92916658A 1991-08-01 1992-07-29 Ameliorations relatives aux traitements photographiques Expired - Lifetime EP0596991B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB919116625A GB9116625D0 (en) 1991-08-01 1991-08-01 Improvements in or relating to photographic processing
GB91166256 1991-08-01
PCT/EP1992/001715 WO1993003416A1 (fr) 1991-08-01 1992-07-29 Ameliorations relatives aux traitements photographiques

Publications (2)

Publication Number Publication Date
EP0596991A1 EP0596991A1 (fr) 1994-05-18
EP0596991B1 true EP0596991B1 (fr) 1996-07-03

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EP92916658A Expired - Lifetime EP0596991B1 (fr) 1991-08-01 1992-07-29 Ameliorations relatives aux traitements photographiques

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EP (1) EP0596991B1 (fr)
JP (1) JP3258322B2 (fr)
DE (1) DE69211993T2 (fr)
GB (1) GB9116625D0 (fr)
HK (1) HK187396A (fr)
WO (1) WO1993003416A1 (fr)

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GB9509039D0 (en) * 1995-05-04 1995-06-28 Kodak Ltd Photographic processing
US5669031A (en) * 1995-06-13 1997-09-16 Fuji Photo Film Co., Ltd. Apparatus for processing photographic sensitive material

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Also Published As

Publication number Publication date
JPH06509661A (ja) 1994-10-27
WO1993003416A1 (fr) 1993-02-18
GB9116625D0 (en) 1991-09-18
DE69211993T2 (de) 1997-01-30
HK187396A (en) 1996-10-18
EP0596991A1 (fr) 1994-05-18
DE69211993D1 (de) 1996-08-08
JP3258322B2 (ja) 2002-02-18

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