US2699393A - Photographic process for the direct production of positive images - Google Patents

Photographic process for the direct production of positive images Download PDF

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Publication number
US2699393A
US2699393A US156230A US15623050A US2699393A US 2699393 A US2699393 A US 2699393A US 156230 A US156230 A US 156230A US 15623050 A US15623050 A US 15623050A US 2699393 A US2699393 A US 2699393A
Authority
US
United States
Prior art keywords
silver halide
layer
reception
positive
silver
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.)
Expired - Lifetime
Application number
US156230A
Other languages
English (en)
Inventor
Weyde Edith
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 AG
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
Priority to BE502525D priority Critical patent/BE502525A/fr
Application filed by Agfa AG filed Critical Agfa AG
Priority to US156230A priority patent/US2699393A/en
Priority to CH282754D priority patent/CH282754A/de
Priority to DE1951890755D priority patent/DE890755C/de
Priority to FR1055844D priority patent/FR1055844A/fr
Priority to GB8855/51A priority patent/GB695905A/en
Application granted granted Critical
Publication of US2699393A publication Critical patent/US2699393A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/24—Photosensitive materials characterised by the image-receiving section
    • G03C8/243—Toners for the silver image
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/166—Toner containing

Definitions

  • This disssolved silver halide diffuses to the reception layer, where it is reduced to a positive image by the developer under the catalytic action of the nuclei for development present in said layer.
  • nuclei for developrnent there may be used for instance colloidal silver, colloidal gold, colloidal silver sulfide or other known substances which either are nuclei for development by themselves or which produce such nuclei for development during the developing process.
  • the silver halide emulsion layer will normally be removed from the reception layer after development.
  • the silver halide emulsions used for the production of the light sensitive layer may be silver chloride emulsions, silver chlorobromide emulsions or silver bromide emulsions containing silver chloride.
  • the light sensitive layer and the reception layer may be arranged on separate supports, for instance on sheets of paper or on films of cellulose acetate, nitrocellulose, polyamide etc, or they may be poured one over the other on the same support. in the latter case the reception layer may be strongly hardened and poured on the support as the undermost layer, while the light sensitive layer is not hardened at all or or only Weakly hardened and poured over the reception layer, so that after development it may be removed by treating it with hot water by which the hardened reception layer is not attacked.
  • the above process is particularly useful for the production of positive images on both sides of a sheet-like support. This may be achieved by using a material carrying reception layers on both sides of the support.
  • a material carrying reception layers on both sides of the support For the direct production of positive images on transparent supports by a reflectographic process there may be used materials coated on one or both sides with a reception layer and a silver halide emulsion layer, the reception layer of which may contain a dispersion of colloidal opaque particles, such as for instance colloidal ZnO, which may be removed by the developing bath or by a separate bath after the development of the material.
  • the developing substance and the silver halide solvent may be used in the alkaline developing solution, however it is also possible to incorporate at least one of them in either the silver halide layer or in the reception layer.
  • the binding agent for the emulsion layer and/ or the reception layer may be a gelatinous or a non-gelatinous substance or a mixture of both.
  • a reception layer is produced by coating a sheet of paper with an aqueous 5 per cent gelatine solution containing 0.05 gr. of colloid silver and 0.05 gr. of 1-phenyl- S-mercapto-1,2,3,4-tetrazoles per liter.
  • a dry silver chlorobromide emulsion layer coated on a paper support is exposed to an object.
  • Both layers are impregnated with a developer containing per liter 20 gr. NazSzOz, 12 gr. hydroquinone, 12 gr. NaOH, 60 gr. NazSOg, 0.5 gr. KBr and pressed together by means of a pressing roll. After about one minute both layers are separated from each other. There is received a positive image in the reception layer equally well toned in the high lights and dark shadows and of agreeable gradation.
  • a photographic light insensitive printing material comprising a light insensitive layer of a water permeable organic colloid containing development nuclei of the group consisting of colloidal noble metals and colloidal water insoluble compounds of noble metals for the reduction of silver halide to metallic silver, and S-mercapto- 1,2,3,4-tetrazo1e.
  • a photographic light insensitive printing material comprising a light insensitive layer of a water permeable organic colloid containing development nuclei of the group consisting of colloidal noble metals and colloidal water insoluble compounds of noble metals for the reduction of silver halide to metallic silver, and 5-mercapto-1,2,3,4-tetrazole, and a silver halide solvent.
  • a photographic light insensitive printing material comprising a light insensitive layer of a water permeableorganic colloid containing development nuclei of the group consisting of colloidal noble metals and colloidal water insoluble compounds of noble metals for the reduction of silver halide to metallic silver, and S-mercaptol,2,3,4-tetrazole, and a silver halide solvent, and a silver halide developing substance.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
US156230A 1950-04-15 1950-04-15 Photographic process for the direct production of positive images Expired - Lifetime US2699393A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE502525D BE502525A (is") 1950-04-15
US156230A US2699393A (en) 1950-04-15 1950-04-15 Photographic process for the direct production of positive images
CH282754D CH282754A (de) 1950-04-15 1950-04-15 Verfahren zur direkten Herstellung von Positiven.
DE1951890755D DE890755C (de) 1950-04-15 1951-03-11 Verfahren zur direkten Herstellung von Positiven
FR1055844D FR1055844A (fr) 1950-04-15 1951-04-12 Procédé pour la production directe d'images positives
GB8855/51A GB695905A (en) 1950-04-15 1951-04-16 Direct production of positive photographic images

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE502525T
US156230A US2699393A (en) 1950-04-15 1950-04-15 Photographic process for the direct production of positive images

Publications (1)

Publication Number Publication Date
US2699393A true US2699393A (en) 1955-01-11

Family

ID=78668846

Family Applications (1)

Application Number Title Priority Date Filing Date
US156230A Expired - Lifetime US2699393A (en) 1950-04-15 1950-04-15 Photographic process for the direct production of positive images

Country Status (6)

Country Link
US (1) US2699393A (is")
BE (1) BE502525A (is")
CH (1) CH282754A (is")
DE (1) DE890755C (is")
FR (1) FR1055844A (is")
GB (1) GB695905A (is")

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774667A (en) * 1951-07-02 1956-12-18 Polaroid Corp Photographic silver halide transfer process
US2882151A (en) * 1955-10-31 1959-04-14 Eastman Kodak Co Photographic roll film transfer process
US3004850A (en) * 1958-11-28 1961-10-17 Ilford Ltd Production of positive photographic records
US3017270A (en) * 1958-03-31 1962-01-16 Eastman Kodak Co Photographic silver halide diffusion transfer process
US3020155A (en) * 1956-05-23 1962-02-06 Eastman Kodak Co Photographic diffusion transfer process
US3060022A (en) * 1959-07-13 1962-10-23 Gen Aniline & Film Corp Image transfer process
US3068098A (en) * 1960-03-23 1962-12-11 Eastman Kodak Co Photographic diffusion transfer process
US3080254A (en) * 1959-10-26 1963-03-05 Minnesota Mining & Mfg Heat-sensitive copying-paper
US3173789A (en) * 1962-01-29 1965-03-16 Eastman Kodak Co Method and composition for inhibiting silver sludge in thiosulfate monobaths
US3177792A (en) * 1960-04-06 1965-04-13 Itek Corp Photographic print processing apparatus
US3232758A (en) * 1959-10-16 1966-02-01 Eastman Kodak Co Photographic diffusion transfer process
US3655380A (en) * 1970-01-14 1972-04-11 Eastman Kodak Co Diffusion transfer product and process containing 5-seleno-1,2,3,4-tetrazole

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE590106A (is") * 1959-04-28
BE593815A (is") * 1959-08-06
BE597026A (is") * 1959-11-14
FR83752E (is") * 1960-11-23 1965-01-15
BE629344A (is") * 1962-03-10
GB1066215A (en) * 1962-11-12 1967-04-26 Fuji Photo Film Co Ltd Improvement in or relating to silver salt diffusion transfer photographic materials

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR879995A (fr) * 1941-01-24 1943-03-10 Ig Farbenindustrie Ag Procédé pour la constitution d'images photographiques positives
GB561875A (en) * 1942-12-03 1944-06-08 John David Kendall Improvements in or relating to photographic materials
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
GB573745A (en) * 1944-02-03 1945-12-04 Wilfrid Hampden Dimsdale Improvements in or relating to photographic light-sensitive elements
US2432506A (en) * 1943-11-26 1947-12-16 Ilford Ltd Treatment of developed silver images with mercapto-tetrazole and triazole compounds
US2432864A (en) * 1944-02-03 1947-12-16 Ilford Ltd Photographic elements bearing silver halide emulsion layer and adjacent light-insensitive colloid layer containing silver derivatives of azoles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR879995A (fr) * 1941-01-24 1943-03-10 Ig Farbenindustrie Ag Procédé pour la constitution d'images photographiques positives
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
GB561875A (en) * 1942-12-03 1944-06-08 John David Kendall Improvements in or relating to photographic materials
US2403927A (en) * 1942-12-03 1946-07-16 Ilford Ltd Improvers for photographic emulsions
US2432506A (en) * 1943-11-26 1947-12-16 Ilford Ltd Treatment of developed silver images with mercapto-tetrazole and triazole compounds
GB573745A (en) * 1944-02-03 1945-12-04 Wilfrid Hampden Dimsdale Improvements in or relating to photographic light-sensitive elements
US2432864A (en) * 1944-02-03 1947-12-16 Ilford Ltd Photographic elements bearing silver halide emulsion layer and adjacent light-insensitive colloid layer containing silver derivatives of azoles

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774667A (en) * 1951-07-02 1956-12-18 Polaroid Corp Photographic silver halide transfer process
US2882151A (en) * 1955-10-31 1959-04-14 Eastman Kodak Co Photographic roll film transfer process
US3020155A (en) * 1956-05-23 1962-02-06 Eastman Kodak Co Photographic diffusion transfer process
US3017270A (en) * 1958-03-31 1962-01-16 Eastman Kodak Co Photographic silver halide diffusion transfer process
US3004850A (en) * 1958-11-28 1961-10-17 Ilford Ltd Production of positive photographic records
US3060022A (en) * 1959-07-13 1962-10-23 Gen Aniline & Film Corp Image transfer process
US3232758A (en) * 1959-10-16 1966-02-01 Eastman Kodak Co Photographic diffusion transfer process
US3080254A (en) * 1959-10-26 1963-03-05 Minnesota Mining & Mfg Heat-sensitive copying-paper
US3068098A (en) * 1960-03-23 1962-12-11 Eastman Kodak Co Photographic diffusion transfer process
US3177792A (en) * 1960-04-06 1965-04-13 Itek Corp Photographic print processing apparatus
US3173789A (en) * 1962-01-29 1965-03-16 Eastman Kodak Co Method and composition for inhibiting silver sludge in thiosulfate monobaths
US3655380A (en) * 1970-01-14 1972-04-11 Eastman Kodak Co Diffusion transfer product and process containing 5-seleno-1,2,3,4-tetrazole

Also Published As

Publication number Publication date
CH282754A (de) 1952-05-15
GB695905A (en) 1953-08-19
FR1055844A (fr) 1954-02-22
DE890755C (de) 1953-09-21
BE502525A (is")

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