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
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials
  • G03C7/24—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials combined with sound-recording

Definitions

• a photosensitive silver halide film material suited for the production of colour images by a known reversal processing method is exposed to a pattern of imagewise modulated electromagnetic radiation. Simultaneously with or subseqeuntly to the image-wise exposure the film is exposed in its area intended for carrying the sound track through a negative sound track original.
• the sound track and picture areas are developed in the usual way in a normal black-and-white developer to produce negative silver images in the picture areas and a positive sound track record in the sound track areas of the film.
• the film is then treated with a stop bath and rinsed.
• the film After having been dried the film is overall exposed to white light and thereupon only its sound track areas are treated with a fixing composition. This may be accomplished e.g. by dipping the edge of the film containing the developed sound track area into a fixing solution or by applying to said area a viscous fixing liquid, e.g. in the form of a paste that is only deposited at the sound track area.
• a fixing composition e.g. in the form of a paste that is only deposited at the sound track area.
• the film then continues through its regular processing for the production of reversed colour images in the picture area of the film by colour development of the re-exposed picture areas.
• the re-exposure of the film may proceed before or after the fixing of the sound track picture.
• the colour developed film is then rinsed, fixed and rinsed again.
• the colour developed and fixed film is treated with a solution containing a substance or substances that re-oxidize(s) the developed silver, which results in the bleaching of the silver in the picture as well as in the sound track areas.
• a solution containing a substance or substances that re-oxidize(s) the developed silver which results in the bleaching of the silver in the picture as well as in the sound track areas.
• a solution containing a substance or substances that re-oxidize(s) the developed silver which results in the bleaching of the silver in the picture as well as in the sound track areas.
• a solution containing a substance or substances that re-oxidize(s) the developed silver which results in the bleaching of the silver in the picture as well as in the sound track areas.
• an aqueous alkaline bleaching solution containing cyanoferrateflll) ions e.g. originating from an alkaline metal cyanoferrate(lll) compound and containing halide ions e.g. originating from an
• the film is rinsed and dried.
• the sound track areas are subjected to a redevelopment with a reducing agent producing a positive silver metal sound track print.
• the film is then rinsed and subjected to a fixing treatment, whereby the silver compounds obtained in the bleaching step are removed from the picture areas, and the surplus of redeveloper in the sound track is removed therefrom by washing.
• the film is rinsed and optionally treated with a hardening substance for the colloid binder and optionally with a stabilizing substance for the dyes of the recording layer(s).
• the fog in the highlights which is produced when said process is carried out, is built up by randomly distributed silver metal agglomerates of different size so that a varying granularity of fog gives rise to a background noise, which itself is more or less modulated.
• the transparency of the highlights can be improved by carrying out the redevelopment in the presence of an organic fog-inhibiting compound.
• Particularly suitable fog-inhibiting compounds for use in the redeveloper composition to improve the signa] to noise ratio are organic heterocyclic compounds containing in. a 5- or 6-membered heterocyclic ring a structural part corresponding with one of the following tautomeric structural groups:
• Preferred heterocyclic compounds for use as foginhibiting compounds containing a 5- or 6-membered heterocyclic ring are:
• HzN 7 s LN'H 5-amino-A4- l ,3,4-oxadiazoline-2-thione,
• the concentration of the fog-inhibiting compound used according to the present invention preferably varies between 0.1 and 5 g per litre of developer solution.
• a suitable concentration ranges from about 2 to 3 g per litre of developer solution if no silver halide complexing agent is present in the developer solution, and from about 0.2 to 0.5 g per litre of developer solution, if a silver halide complexing agent is present.
• a developing agent known for use in a black-andwhite developer is used.
• the development of sound recordings has been described e.g. by P. Glafkides in Photographic Chemistry Fountain Press London (1958) 261-262 and 264-265.
• an energetic developer is used for variable area recordings e.g. a developer containing hydroquinone as the sole developing agent.
• the developer composition may contain other ingredients common to black-and-white silver halide developers e.g. an anti-oxidizing agent, a wetting agent, development accelerating compounds, alkaline substances, a pH-controlling agent, a silver complexing agent, a toning agent, and a viscosity-controlling agent.
• More particularly substances such as sulphites, an alkaline metal carbonate, potassium bromide, borates, ethylene diamine, an alkali-soluble polyoxyalkylene compound e.g. a polyoxyethylene glycol, a polyol such as e.g. a hexylene glycol and a thickening agent such as a water-soluble cellulose derivative,. e.g. hydroxyethylcellulose.
• an alkali-soluble polyoxyalkylene compound e.g. a polyoxyethylene glycol
• a polyol such as e.g. a hexylene glycol
• a thickening agent such as a water-soluble cellulose derivative,. e.g. hydroxyethylcellulose.
• the application of the redeveloper composition to the sound track area may be accomplished in any convenient manner such as by passing the edge of the film bearing the redevelopable sound track image through a bath containing the developing agent and the foginhibiting agent or by applying a viscous liquid or paste to such area e.g. by means of a roller wetted with a said developer composition.
• the period of time and the temperature that the sound track portion of the film is in contact with the redeveloper composition depends on the activity of the developing agent, the pH of the developing medium and the concentration of ingredients that speed up or retard the development.
• the contact time, the temperature, and the concentration should be adjusted to obtain the desired optical density in the photoexposed portions and an almost complete transparency in the highlights of the sound track.
• Composition 1 gvtnmuntm AZ-l.2,4-triazoline-5-thione has been prepared as described in Organic Synthesis 40. )9.
• Composition 2 hydroquinone sodium sul hite sodium h roxide S-aminol ,2,4-triazoline-5-thione ethylene diamine co ilymer of methyl vinyl ether and a h f amide of maleic acid/molar ratio 50:50 average molecular weight 30.000
• variable area sound tracks water to make 1000 ml 3-amino-A2-l.2.4-triuzoline-5-thiune has been prepared according to example 6 of the United Kingdom Patent Specification 737,568 filed June ll, I952 by llford Limited
• the present invention is suited for the reproduction of all types of variable area sound tracks, preference 6 being given, however, to the printing of a sound track from a negative sound track.
• Different types of variable area sound track negatives and their production are described e.g. by P. Glafkids, in Photographic Chemistry Vol. I Fountain Press London (1958) 258-262.
• the process of the present invention is especially advantageous for producing a sound track on a multilayer photographic colour film of the reversal type having superposed emulsion layers sensitive to different regions of the visible spectrum and of which one area is reserved for photographic sound track recording and another area is reserved for picture recording e.g. in the form of the picture frames of a colour motion picture film.
• Reversal type multicolour photographic films and their processing have been described e.g. by P. Glafkids in his above mentioned book, vol. I], on pages 615-626 and in the United States Patent Specification 2,252,718 of Leopold D. Mannes, Leopold Godowsky and Lot S. Wilder, issued Aug. 19, 1941.
• a reversal-type multilayer colour print film permitting the printing of a sound track from a negative sound track as well as from a positive is e.g. the Gevachrome Print Film Type 9.02 of A'GFA-GEVAERT N.V., which film is suited for printing release copies from colour reversal originals as described in the Journal of the S.M.P.T.E. December l967 and the technical bulletin of Agfa-Gevaert N.V., Belgium, relating to such film and published January 1968.
• the rear side of the resin support was coated with an antihalation layer containing carbon black.
• the resulting film was contact-exposed through a colour film containing positive multicolour picture frames and synchronically exposed through a variable area negative sound track of a master film.
• the exposed print film was then developed for 2 minutes in a black-and-white developer of the following composition:
• one part of the film was taken to redevelop the sound track in a redeveloper A without a fog-inhibiting agent, whereas another part of the film was taken to redevelop the sound track in a developer B containing a foginhibiting agent.
• composition of redeveloper A hydroquinone sodium sulphite sodium hydroxide ethylene diamine a copolymer of methyl vinyl ether and a half amide of maleic acid (molar ratio 50/50 average molecular weight 30,000)
• the whole processing was carried out a temperature of 25C.
• the sensitometric values of the sound track records obtained when using the redevelopers A and B are given hereinafter.
• the Fog represents the optical density in the clear areas of the sound track.
• the Maximum Density is the optical density of the opaque areas of the sound track.
• the Average Gradient is the slope of the straight line connecting the point of the characteristic curve having the absolute density 1.4 with the point of the curve being situated 0.6 log it away towards the lower densities.
• Example I was repeated with the difference, how ever, that the redeveloper A was replaced by a redevel- Example 5 was repeated with the difference, however, that the redeveloper A was replaced by a redeveloper L and the redeveloper B was replaced by a redeveloper M having the following compositions respectively:
• Redeveloper L hydroquinone sodium sul hite sodium hy roxide ethylenle diamitne m l th acopoymero me y vin le er and a half amide of maleic acid (molar ratio 50:50 average molecular weight 30,000)
• X is -NH-, -O, or S
• organic heterocyclic compound is at least one of the following compounds:

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Optical Record Carriers And Manufacture Thereof (AREA)

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Family Applications (1)

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Citations (3)

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• 0
  • BE BE791844D patent/BE791844A/nl unknown
• 1971
  • 1971-11-26 GB GB5509371A patent/GB1403722A/en not_active Expired
• 1972
  • 1972-11-22 DE DE2257346A patent/DE2257346C2/de not_active Expired
  • 1972-11-24 US US00309120A patent/US3854944A/en not_active Expired - Lifetime
  • 1972-11-24 CA CA157,458A patent/CA1000550A/en not_active Expired
  • 1972-11-24 FR FR7242156A patent/FR2161120B1/fr not_active Expired
  • 1972-11-27 JP JP11880772A patent/JPS5531459B2/ja not_active Expired

Patent Citations (3)

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