DE900298C - Contact process for the production of photographic positive images using highly sensitive negative layers - Google Patents

Contact process for the production of photographic positive images using highly sensitive negative layers

Info

Publication number
DE900298C
DE900298C DEF3081D DEF0003081D DE900298C DE 900298 C DE900298 C DE 900298C DE F3081 D DEF3081 D DE F3081D DE F0003081 D DEF0003081 D DE F0003081D DE 900298 C DE900298 C DE 900298C
Authority
DE
Germany
Prior art keywords
highly sensitive
production
silver
contact process
positive images
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
Application number
DEF3081D
Other languages
German (de)
Inventor
Dr Edith Weyde
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
Application filed by Agfa AG filed Critical Agfa AG
Application granted granted Critical
Publication of DE900298C publication Critical patent/DE900298C/en
Expired legal-status Critical Current

Links

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
    • G03D9/00—Diffusion development 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
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • 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
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G03C5/10—Reflex-printing; Photoprinting using fluorescent or phosphorescent means
    • 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

Landscapes

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

Description

Die im Patent 887 733 angegebene Arbeitsweise eignet sich dm wesentlichen für Chlorsilber- bzw. Chlorbromsilberemulsionen. Reine Bromsilberemulsionen sind hierfür weniger gut geeignet, da sich Bromsilber einerseits in Fixiernatron zu langsam löst und andererseits Bromionen die Reduktion des Silberthiosulfats aus der Lösung stark hemmen.The method of operation specified in patent 887 733 is essentially suitable for chlorosilver resp. Chlorobromide silver emulsions. Pure bromide silver emulsions are less suitable for this because On the one hand, silver bromide dissolves too slowly in fixing soda and, on the other hand, bromine ions cause the reduction strongly inhibit the silver thiosulfate from the solution.

Um hochempfindliche Schichten herzustellen, die nach diesem Verfahren Positivbilder ergeben, hat es sich als zweckmäßig erwiesen, eine Mischung aus einer hochempfindlichen Bromsilberemulsion mit einer wenig empfindlichen Chlorsilberemulsion zu verwenden. Bei der Belichtung wird lediglich die Bromsilberemulsion so weit beeinflußt, daß nur sie bei der nachfolgenden Entwicklung in einem fixiernatronhaltigen Entwickler reduziert wird. Die bei dem Entwicklungsprozeß frei werdenden Bromionen hemmen an dieser Stelle die Auflösung des gleichzeitig anwesenden Chlorsilbers. Nur an den unbelichteten oder wenig belichteten Stellen tritt die Diffusion des in Fixiernatron gelösten Chlorsilbers in eine mit der Negativschicht in engen Kontakt gebrachten Positivschicht ein. Die Positivschicht enthält, wie dies in der Patentschrift 887 733 näher ausgeführt wurde, kolloidales Silber oder ähnliche Stoffe, welche durch Keimwirkung die ReduktionIn order to produce highly sensitive layers which result in positive images by this process it has proven to be useful to use a mixture of a highly sensitive bromide silver emulsion a less sensitive chlorine silver emulsion. During the exposure, only the Silver bromide emulsion influenced so much that only it in the subsequent development in a fixing soda Developer is reduced. The bromine ions released during the development process at this point inhibit the dissolution of the silver chlorine present at the same time. Only on the unexposed or little exposed areas, the diffusion of the silver chlorine dissolved in fusing soda occurs into a positive layer brought into close contact with the negative layer. The positive layer contains, as was explained in more detail in the patent specification 887 733, colloidal silver or the like Substances which through germination effect the reduction

des gelösten Silberthiosulfats bewirken, und Stoffe, wie ζ. B. Merkaptobenzthiazol, welche in Fixiernatron schwerlösliche Silbersalze ergeben.of the dissolved silver thiosulphate, and substances like ζ. B. Mercaptobenzothiazole, which result in sparingly soluble silver salts in fixing soda.

Beispielexample

Zur Herstellung der Positivschicht eignet sich eine 5%ige Gelatinelösung, der auf ι 1 0,05 mg gelbes kolloidales Silber, 0,05 g Merkaptobenzthiazol und als Halogensilberlösungsmittel 40 g Fixiernatron zugesetzt werden. Zur Herstellung der Negativschicht wird eine Mischung von 30 Teilen einer hochempfindlichen Bromsilberemulsion mit 70 Teilen einer üblichen Chlorsilberemulsion verwendet. Nach Belichtung der Negativschicht durchfeuchtet man die beiden Schichten mit folgendem Entwickler: 1,5 g Metol, 6 g Hydrochinon, 80 g Natriumsulfit (wasserfrei), 15 g Ätznatron, 1000 ecm Wasser.A 5% gelatin solution containing 1 0.05 mg is suitable for producing the positive layer yellow colloidal silver, 0.05 g mercaptobenzothiazole and, as a halogen silver solvent, 40 g fixing soda can be added. A mixture of 30 parts is used to produce the negative layer a high sensitivity bromide silver emulsion with 70 parts of a common chlorosilver emulsion was used. After exposure of the negative layer, the two layers are moistened with the following Developer: 1.5 g Metol, 6 g hydroquinone, 80 g sodium sulfite (anhydrous), 15 g caustic soda, 1000 ecm Water.

Danach werden die Schichten in engen Kontakt gebracht und nach 30 Sekunden wieder auseinandergezogen. Die Positivschicht muß hiernach noch kurz gewässert werden.The layers are then brought into close contact and pulled apart again after 30 seconds. The positive layer must then be briefly watered.

Claims (1)

Patentanspruch:Claim: Kontaktverfahren zur Herstellung von photographischen Positivbildern bei Verwendung hochempfindlicher Negativschichten nach Patent 887 733, dadurch gekennzeichnet, daß man als Negativschicht eine Mischung von einer hochempfindlichen Bromsilberemulsion mit einer weniger empfindlichen Chlorsilberemulsion verwendet. Contact process for the production of photographic Positive images when using highly sensitive negative layers according to Patent 887 733, characterized in that as Negative layer a mixture of a highly sensitive bromide silver emulsion with a less sensitive silver chlorine emulsion used. I 5652 32.53I 5652 32.53
DEF3081D 1941-01-24 1941-02-07 Contact process for the production of photographic positive images using highly sensitive negative layers Expired DE900298C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEF0003080 1941-01-24
DEF0003081 1941-02-07

Publications (1)

Publication Number Publication Date
DE900298C true DE900298C (en) 1953-12-21

Family

ID=25973692

Family Applications (2)

Application Number Title Priority Date Filing Date
DEF3080D Expired DE887733C (en) 1941-01-24 1941-01-25 Process for the accelerated production of a photographic positive image from an original
DEF3081D Expired DE900298C (en) 1941-01-24 1941-02-07 Contact process for the production of photographic positive images using highly sensitive negative layers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DEF3080D Expired DE887733C (en) 1941-01-24 1941-01-25 Process for the accelerated production of a photographic positive image from an original

Country Status (4)

Country Link
BE (1) BE444702A (en)
CH (1) CH240472A (en)
DE (2) DE887733C (en)
FR (2) FR879995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187879A1 (en) * 1985-01-15 1986-07-23 Agfa-Gevaert N.V. Method and material for the production of continuous tone silver images by the silver complex diffusion transfer reversal process

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US2732778A (en) * 1956-01-31 Limberger
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US2692830A (en) * 1944-11-03 1954-10-26 Polaroid Corp Photographic silver halide transfer process
US2500421A (en) * 1944-11-03 1950-03-14 Polaroid Corp Photographic silver halide transfer process
US2609296A (en) * 1945-05-21 1952-09-02 Polaroid Corp Composite photographic product comprising a photosensitive element and a container carrying a liquid for processing said element
GB595582A (en) * 1945-07-10 1947-12-09 Cecil Waller Improvements in or relating to coloured colloid layers
DE945608C (en) * 1945-10-06 1956-07-12 Polaroid Corp Apparatus for processing exposed photographic film strips
US2544268A (en) * 1948-10-07 1951-03-06 Polaroid Corp Photographic product
US2612450A (en) * 1946-01-17 1952-09-30 Polaroid Corp Self-framing photographic film unit containing a liquid, and process for producing framed positive images
US2616805A (en) * 1946-02-21 1952-11-04 Polaroid Corp Photographic film assembly comprising a photosensitive layer and another layer hingedly connected together
US2698245A (en) * 1946-04-13 1954-12-28 Polaroid Corp Photographic product and process for making a positive transfer image
BE471336A (en) * 1946-04-13
US2500422A (en) * 1946-05-08 1950-03-14 Polaroid Corp Photographic product
US2607685A (en) * 1946-10-03 1952-08-19 Polaroid Corp Photographic product comprising a plurality of rupturable containers, each carrying a liquid for processing said product
BE476512A (en) * 1946-10-07
US2661293A (en) * 1946-10-08 1953-12-01 Polaroid Corp Process of producing a colored photographic image by means of exhaustion of developer
US2647055A (en) * 1946-11-06 1953-07-28 Polaroid Corp Photographic product and process for forming a white image viewable against a dark background
US2616807A (en) * 1946-11-29 1952-11-04 Polaroid Corp Silver halide developer containing a film-forming plastic and a water insoluble finely comminuted solid substance
US2612451A (en) * 1946-11-29 1952-09-30 Polaroid Corp Photographic product, including a container and means for rupturing said container
US2603565A (en) * 1947-01-15 1952-07-15 Polaroid Corp Photographic film forming image transfer composition
US2543181A (en) * 1947-01-15 1951-02-27 Polaroid Corp Photographic product comprising a rupturable container carrying a photographic processing liquid
US2563342A (en) * 1947-01-28 1951-08-07 Polaroid Corp Photographic product and process
FR960188A (en) * 1947-01-28 1950-04-14
US2584030A (en) * 1947-02-07 1952-01-29 Polaroid Corp Light sensitive silver halide photographic product for image transfer and process utilizing the same
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US2698238A (en) * 1947-02-08 1954-12-28 Polaroid Corp Photographic product and process
US2644756A (en) * 1947-02-08 1953-07-07 Polaroid Corp Photographic process for forming a positive transfer image
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US2661292A (en) * 1947-02-19 1953-12-01 Polaroid Corp Product for dispensing a liquidcoated sheet
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US2516398A (en) * 1947-02-20 1950-07-25 Polaroid Corp Photographic apparatus for exposing and processing photographic film
US2647049A (en) * 1947-02-25 1953-07-28 Polaroid Corp Photographic element for color photography and a process of producing multicolor pictures
US2622025A (en) * 1947-04-03 1952-12-16 Ilford Ltd Light-sensitive photographic element and process using it
US2579587A (en) * 1947-10-25 1951-12-25 Polaroid Corp Photographic product containing a rupturable container
US2644755A (en) * 1947-12-09 1953-07-07 Polaroid Corp Photographic product for carrying out a one-step photographic process
US2659673A (en) * 1948-02-03 1953-11-17 Polaroid Corp Photographic product containing a strippable mask
US2759825A (en) * 1948-02-12 1956-08-21 Polaroid Corp Photographic image transfer process
US2647056A (en) * 1948-02-12 1953-07-28 Polaroid Corp One step photographic transfer process
US2559643A (en) * 1948-02-19 1951-07-10 Polaroid Corp Photographic product and process
US2635048A (en) * 1948-07-06 1953-04-14 Polaroid Corp Photographic transfer product and process
US2662822A (en) * 1949-04-21 1953-12-15 Polaroid Corp Photographic transfer processes and compositions for the practice of said processes
US2657618A (en) * 1949-05-13 1953-11-03 Eisbein Walter Developing apparatus
BE502525A (en) * 1950-04-15
DE969482C (en) * 1950-05-03 1958-06-04 Dr Marius Boeger Apparatus for generating photographic images
US2572358A (en) * 1950-07-15 1951-10-23 Polaroid Corp Multilayer photographic film unit containing a liquid and having one layer movable with respect to another layer
US2565378A (en) * 1950-09-19 1951-08-21 Polaroid Corp Photographic product
US2666384A (en) * 1951-12-21 1954-01-19 Eastman Kodak Co Photographic copying apparatus
US2751814A (en) * 1951-12-31 1956-06-26 Messrs Lumoprint Zindler K G Photographic print making machine
US2742838A (en) * 1952-02-16 1956-04-24 Gen Photo Mfg Co Inc Apparatus for producing photocopy prints
NL87015C (en) * 1952-07-16
US2765240A (en) * 1953-01-15 1956-10-02 Polaroid Corp Process for forming print-receiving elements
DE959614C (en) * 1953-02-04 1957-03-07 Zindler Lumoprint Kg Apparatus for making photographic copies
US2810331A (en) * 1953-05-08 1957-10-22 Grinten Chem L V D Apparatus for carrying out a transfer process
DE1034025B (en) * 1953-10-28 1958-07-10 Dr Marius Boeger Device for developing photographic layers using the diffusion process
DE1029232B (en) * 1954-01-22 1958-04-30 Agfa Ag Device for the production of direct positives using the silver salt diffusion process
DE1024802B (en) * 1954-04-30 1958-02-20 Kennedy Instr Ltd Apparatus for transmitting a photographic image
DE1025718B (en) * 1954-09-08 1958-03-06 Dr Marius Boeger Device for producing reproductions by the diffusion process
DE1051637B (en) * 1954-09-15 1959-02-26 Hans Von Fraunhofer Process for the production of negatives from a negative color photographic material
DE976310C (en) * 1954-12-23 1963-06-20 Agfa Ag Process for making direct positives using the silver salt diffusion process
US3003871A (en) * 1955-09-29 1961-10-10 Polaroid Corp Photographic apparatus and process for treating light-sensitive material
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US3048486A (en) * 1960-02-01 1962-08-07 Peerless Photo Products Inc Photographic positive printing system
US3532497A (en) * 1963-08-05 1970-10-06 Eastman Kodak Co Nuclei for use in solvent transfer systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187879A1 (en) * 1985-01-15 1986-07-23 Agfa-Gevaert N.V. Method and material for the production of continuous tone silver images by the silver complex diffusion transfer reversal process

Also Published As

Publication number Publication date
DE887733C (en) 1953-08-27
CH240472A (en) 1945-12-31
BE444702A (en)
FR879995A (en) 1943-03-10
FR53311E (en) 1945-10-16

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