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
  • G03C5/30—Developers
  • G03C5/3028—Heterocyclic compounds
• • 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
  • G03C5/262—Processes using silver-salt-containing photosensitive materials or agents therefor using materials covered by groups G03C1/42 and G03C1/43
• • 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
  • G03C5/30—Developers
  • G03C5/3028—Heterocyclic compounds
  • G03C5/3035—Heterocyclic compounds containing a diazole ring
• • 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
  • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
  • G03C8/02—Photosensitive materials characterised by the image-forming section
  • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
  • G03C8/06—Silver salt diffusion transfer

Definitions

• This invention relates to a new process for the development of exposed silver halide emulsion layers, more especially to a rapid developing rocess, and to photographic light-sensitive material used therein.
• alkali however, has the disadvantage of rendering the photographic baths subject to aerial oxidation and, thus unstable. Another disadvantage is that an alkali residue builds up in the subsequent treating baths, e.g. the acid fixing bath and neutral stabilizing bath, whereby their chemical composition becomes a!- tered and their function impaired.
• an exposed silver halide emulsion layer can be satisfactorily developed using a S-pyrazolidone derivative as the developing substance at a pH which is less than 7, provided the temperature of the developing bath is sufi'lciently high.
• the 3-pyirazolid'one derivatives are themselves known developing agents, being commonly employed in conjunction with hydroquinone.
• the performance of the best known member of this group, 1-phenyl-3-pyrazolidone has been examined quite extensively under experimental conditions and the results published in an article by James and Vanselow, The Kinetics of Development by 1-Phenyl-3-Pyrazoliclone, Photographic Science and Technique, PSA Technical Quarterly, August 1954, pp. 77-80.
• the former showed development proceeded at an extremely slow rate in the region of neutrality and below, whereby the density obtained at prl 5 .5 with eight minutes development time being only about 20% of that obtained at about pH 9 with three minutes development time.
• the latter showed the temperature dependence of the rate of development followed a simple Arrhenius curve over the range of 540 C. at pl-Is varying from 6.5 to 13.5. This means that at increasing temperature the rate of development increases in a lessening rate approaching some limiting value. Consequently one would logically expect that further increases in temperature above the maximum temperature of C. of the above. James article, would produce no significant increase in the rate of development.
• 3-pyrazolidone derivatives useful as developing sub stances in the process according to the present invention correspond to the following general formula R represents an aryl radical, substituted or unsubstituted,
• R represents a hydrogen atom or an acyl radical, such as an acetyl radical
• each of R R R and R represents a hydrogen atom, an alkyl radical, substituted or unsubstituted, and an aryl radical, substituted or unsubstituted.
• the 3-pyrazolidone derivative employed in this invention can be dissolved in an aqueous solution, which may occasionally be buffered.
• the developing substance may also be incorporated directly in the silver halide emulsion layer, or in a pre-coat or an after-coat for that layer in which event the resultant developer-containing material can then be developed simply by means of water at 45 to 100 C.
• the quantity of developing substance that is used can amount to 10 to 300 g./mol of silver halide present in the light-sensitive material. Best results, however, have been obtained with 100 g./mol of silver halide.
• silver chloride emulsions As light-sensitive emulsions, silver chloride emulsions, silver bromide emulsions, silver iodide emulsions or emulsions of mixtures of these silver halides can be applied.
• the amount of silver halide provided in the light-sensitive material may vary from an amount equivalent to 0.3 g. of silver to an amount equivalent to 3 g. of silver/sq.m. but optimally amounts to the equivalent of 1 g. of silver/ sq.m.
• ingredients for obtaining a neutral image tone such as ingredients for obtaining a neutral image tone, hardening agents, stabilizing agents and development activators.
• l-phenyl-S-mercapto-1,2,3,4-tetrazole and the products described in British patent specifications 561,875 and 695,905 may be used.
• development activator Naloamine G13 (trade' name for 1(,B-hydroxyethyD-Z-(heptadec-S-enyl)-A -imidazoline, marketed by National Aluminate Corporation, Chicago, Illinois, U.S.A.), can successfully be used.
• Suitable fixing agents are, e.g. sodium thiosulfate, and its substitution products, such as ethyl sodium thiosulfate.
• Suitable stabilizing agents are e.g. 1,3-trimethylenethiourea, 2-thio-perhydro-s-triazine-2-one, 2-thio-5-methylperhydro-s-triazine-Z-one, 2-thio-4-hydroxy-4-methyl-perhydropyrimidine-2-one and 4-morpholinyl-thiocarbonarnide.
• the used concentrations of these compounds may vary between 0.5 and 5% dependent on the temperature of the liquid and the travelling rate of the material through the bath.
• a specially interesting embodiment of the new process consists in carrying out the development in a solution of the fixing agent or stabilizing agent instead of in warm water.
• the concentration and the temperature can then be chosen in such a way that the development has a sufficient lead on the fixation or stabilization, so that the complete formation of the image can be realized by one single treatment in a single bath.
• Example I Onto a paper support is coated a silver chlorobromoiodide emulsion layer from the following composition: Silver chlorobromoiodide emulsion containing an amount of silver halide equivalent to 50 g. of silver per liter g 1000 Water cm. 1240 40% aqueous formaldehyde cm. 5 Nalcamine G13 (trade name) g 20% aqueous saponine cm. 5
• This emulsion is coated in such a way that 1 liter of this composition covers 13 sq. m. of paper. After drying, the obtained light-sensitive material is exposed and subsequently developed for 2 sec. in 1% aqueous solu- 4 tion of 1-phenyl-3-pyrazolidone heated to C. and having a pH of 4.4.
• Example 11 Onto a paper support is coated a silver chloride emulsion layer from the following composition:
• Silver chloride emulsion containing per liter an amount of silver chloride equivalent to 29 g. of silver g 1000 Water cm. 500 5% solution of l phenyl 3 pyrazolidone in ethanol cm. 500 40% aqueous formaldehyde cm. 5 20% aqueous saponine cm. 5
• the emulsion is applied in such a way that 1 liter of this composition covers 20 sq. m. of paper. After drying, the obtained light-sensitive material is exposed and then developed for 2 sec. in water of 80 and pH of 5.7. Thereupon, the developed material is stabilized as in Example I.
• Example II On a paper support is coated a silver chloride emulsion layer from the following composition:
• This emulsion is coated in such a way that 1 liter of this composition covers 20 sq. m. of paper. Then an after-coat is applied on top thereof from a 5% solution of l-phenyl-3-pyrazolidone in ethanol. The material is then further treated as in Example II.
• Example IV Onto a paper support a pre-coat is applied from the following solution at 35 C.:
• This pre-coat is applied in such a way that 1 liter of this composition covers 10 sq. m. of paper.
• a silver chloride emulsion layer is applied from the following composition:
• Example V A light-sensitive photographic material is manufactured by applying onto a paper support a silver chloride emusion layer from the following composition:
• An image-receiving material is manufactured by applying onto a paper support a nuclei-containing layer from a suspension of the following composition:
• the light-sensitive material together with the image-receiving material are carried through a diffusion transfer developing apparatus containing an 80 C. warm treating liquid of the following composition, having a pH of 5.3:
• Example VI A photographic material is prepared by applying onto a paper support a nuclei-containing layer from a suspension of the following compositon:
• a light-sensitive emulsion layer is applied thereon from the following composition:
• this light-sensitive material is image-wise exposed and developed for 30 sec. in the following developing composition at 50 C.:
• Example VII-XI Five tests strips of a light-sensitive negative-forming material prepared as described in Example I above are similarly exposed and then dipped one :by one for 1 second into a 1% aqueous solution of l-phenyl-3-pyrazolidone which is maintained at a pH of 5.9 by means of a buffering agent, the temperature of the bath being adjusted to 20 C. for the first strip and then raised 20 C. for each succeeding strip, reaching 100 C. for the last. After dipping, the strips are immediately stablized as in Example I.
• Examples XII-XVI Another set of tests strips is processed as described in Examples VII-XI except that the bath is maintained at a pH of 4.5 and the dipping time is extended to 15 seconds. The maximum density and fog levels are determined as before with the following results:
• a process of photographic reproduction comprising subjecting a photographic material comprising a support and an exposed photographic silver halide emulsion layer on one side of said support to development with a 3 pyrazolidone developing agent, said development being carried out by treating said exposed photographic silver halide emulsion layer with an aqueous solution in the presence of said 3-pyrazoliclone developing agent at a pH of less than 7 and at a temperature from 45 C. to 100 C.
• R is an aryl radical
• R is a member selected from the group consisting of a hydrogen atom and an acyl radical
• each of R R R and R is a member selected from the group consisting of a hydrogen atom, an alkyl radical, and an aryl radical.
• tion contains a stabilizing agent for silver halide.
• said emulsion layer contains sutficient silver halide to provide about 0.3-3 grams of silver per square meter of surface area and said developing agent is present in an amount of about 10-300 grams per mol of said silver.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=19752823

Family Applications (1)

Country Status (6)

Cited By (5)

Families Citing this family (1)

• 0
  • NL NL110302D patent/NL110302C/xx active
  • NL NL260300D patent/NL260300A/xx unknown
• 1962
  • 1962-01-18 DE DE19621422892 patent/DE1422892A1/de active Pending
  • 1962-01-19 CH CH67762A patent/CH418127A/de unknown
  • 1962-01-20 FR FR885398A patent/FR1311068A/fr not_active Expired
  • 1962-01-22 GB GB2285/62A patent/GB1002647A/en not_active Expired
• 1965
  • 1965-09-21 US US489080A patent/US3261685A/en not_active Expired - Lifetime

Non-Patent Citations (1)

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