DE681330C - Process for the rapid development of photographic films with hot treatment baths to eliminate veil blackening - Google Patents

Process for the rapid development of photographic films with hot treatment baths to eliminate veil blackening

Info

Publication number
DE681330C
DE681330C DEI50089D DEI0050089D DE681330C DE 681330 C DE681330 C DE 681330C DE I50089 D DEI50089 D DE I50089D DE I0050089 D DEI0050089 D DE I0050089D DE 681330 C DE681330 C DE 681330C
Authority
DE
Germany
Prior art keywords
blackening
veil
rapid development
eliminate
photographic films
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
DEI50089D
Other languages
German (de)
Inventor
Dr John Eggert
Dr Richard Schmidt
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI50089D priority Critical patent/DE681330C/en
Priority claimed from GB24540/34A external-priority patent/GB443295A/en
Application granted granted Critical
Publication of DE681330C publication Critical patent/DE681330C/en
Expired 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/261—Non-bath processes, e.g. using pastes, webs, viscous compositions

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Description

Verfahren zum Schnellentwickeln photographischer Filme mit heißen Behandlungsbädern zur Ausschaltung der Schleierschwärzung Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Schnellentwicklung von Filmen, das durch Anwendung der an sich bekannten Umkehrentwicklung die Schleierschwärzung der abzutastenden Filme vermeidet und insbesondere für die Zwecke des Fernsehens und für die Schnellentwicklung von Tonfilmen geeignet ist.Process for the rapid development of photographic films with hot Treatment baths to eliminate the veil blackening the subject of the present Invention is a method for the rapid development of films by application the inverse development, known per se, is the blackening of the veil to be scanned Avoids films and especially for the purposes of television and for rapid development of sound films is suitable.

Es ist bekannt, für das Zwischenfilmverfahren beim Fernsehen die Filme durch Heißentwicklung innerhalb weniger Sekunden gebrauchsfertig herzustellen. Bei der direkten Entwicklung in den heißen Bädern entsteht jedoch immer ein Schleier von etwa 0,2 bis 0,3, der für eine Abtastung mit der Photozelle wegen der damit verbundenen Lichtverluste sehr schädlich ist.It is known for the intermediate film process in television to produce the films ready for use within a few seconds by hot development. During direct development in the hot baths, however, a haze of around 0.2 to 0.3 always arises, which is very harmful for scanning with the photocell because of the associated loss of light.

Es ist nun ohne weiteres möglich, diese Schleierschwärzung zu vermeiden, wenn der Film nach dem Umkehrverfahren entwickelt wird. Dabei werden alle oder fast alle Bäder, insbesondere das erste Entwicklungsbad, auf höhere Temperaturen gebracht, so daß die Behandlung nur einen Bruchteil der sonst üblichen Zeit in Anspruch nimmt. Die Umkehrentwicklung kann an sich nach jeder der bekannten Methoden durchgeführt werden, also entweder mit Bromsilber Iösendem erstem Entwickler oder mit normalem Entwickler, unter Anwendung einer zweiten Belichtung oder unter Benutzung eines Schwärzungsbades. Es gelingt, bei dieser Art von Entwicklung nach Abzug des durch die Unterlage bedingten Schleiers auf eine Schleierschwärzung von o zu kommen. Dabei genügt es, als maximale Schwärzung einen Wert von S = i,o bis 1,3 einzuhalten.It is now easily possible to avoid this fogging if the film is developed according to the reversal process. All or almost all of the baths, in particular the first developing bath, are brought to higher temperatures so that the treatment takes only a fraction of the time normally required. The reverse development can be carried out according to any of the known methods, either with a first developer dissolving bromide or with a normal developer, using a second exposure or using a blackening bath. With this type of development, after the haze caused by the substrate has been subtracted, it is possible to achieve a haze blackening of o. It is sufficient to maintain a value of S = i, o to 1.3 as the maximum blackening.

Der Film kann beispielsweise hintereinander in Entwicklungs- und Umkehrbädern von 6o bis 70' C entwickelt und umgekehrt werden, wobei folgende Zeiten für die einzelnen Bäder innegehalten werden: Erste Entwicklung .... ¢ Sekunden, Abspülen . . . . . . . . . . . . . . . i Sekunde, Bleichbad . . . . . . . . . . . . . . 6 Sekunden, Abspülen ...: . . . .. . .. .. i Sekunde, Klärbad ....... ....... 5 Sekunden, Abspülen , . . . . . . . . . . . . . i Sekunde, Zweite Entwicklung ... 5 Sekunden, Abspülen .. . . . . . . . . . . . . i Sekunde. Die gesamte Zeit für die Umkehrentwicklung beträgt demnach a4. Sekunden. Außer für Fernsehzwecke kann das beschriebene Verfahren auch für die Schnellentwicklung von Tonfilmen, bei denen, insbesondere bei der Aufzeichnung in Zadkenschrift (Einfach- oder Vielfachzacken), eine möglichst geringe Schleierschwärzung von Vorteil ist, angewendet werden.The film can, for example, be developed and reversed one after the other in developing and reversing baths from 6o to 70.degree . C., the following times being observed for the individual baths: first development .... ¢ seconds, rinsing. . . . . . . . . . . . . . . Second, bleach bath. . . . . . . . . . . . . . 6 seconds, rinse ...:. . . ... .. .. i second, clarifying bath ....... ....... 5 seconds, rinsing,. . . . . . . . . . . . . i second, second development ... 5 seconds, rinse ... . . . . . . . . . . . i second. The total time for the reversal development is therefore a4. Seconds. In addition to being used for television purposes, the described method can also be used for the rapid development of sound films in which, especially when recording in Zadkenschrift (single or multiple points), the lowest possible veil blackening is advantageous.

Claims (1)

PATENTANSPRUCH: Verfahren zum Schnellentwickeln photographischer Filme mit heißen Behandlungsbädern zur Ausschaltung der Schleierschwärzung, dadurch gekennzeichnet, daß die Filme nach dem Umkehrverfahren entwickelt werden.PATENT CLAIM: Process for the rapid development of photographic films with hot treatment baths to eliminate the veil blackening, characterized in that, that the films are developed by the reversal process.
DEI50089D 1934-07-06 1934-07-07 Process for the rapid development of photographic films with hot treatment baths to eliminate veil blackening Expired DE681330C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI50089D DE681330C (en) 1934-07-06 1934-07-07 Process for the rapid development of photographic films with hot treatment baths to eliminate veil blackening

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEI0050089 1934-07-06
DEI50089D DE681330C (en) 1934-07-06 1934-07-07 Process for the rapid development of photographic films with hot treatment baths to eliminate veil blackening
GB24540/34A GB443295A (en) 1934-07-06 1934-08-25 Improvements relating to the rapid development of photographic films

Publications (1)

Publication Number Publication Date
DE681330C true DE681330C (en) 1939-09-19

Family

ID=27211011

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI50089D Expired DE681330C (en) 1934-07-06 1934-07-07 Process for the rapid development of photographic films with hot treatment baths to eliminate veil blackening

Country Status (1)

Country Link
DE (1) DE681330C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150871B (en) * 1958-05-14 1963-06-27 Gen Aniline & Film Corp Process for developing exposed gelatin-silver halide emulsion layers without fixing the remaining silver halide
US3536486A (en) * 1969-02-03 1970-10-27 Eastman Kodak Co High temperature processing of exposed photographic elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150871B (en) * 1958-05-14 1963-06-27 Gen Aniline & Film Corp Process for developing exposed gelatin-silver halide emulsion layers without fixing the remaining silver halide
US3536486A (en) * 1969-02-03 1970-10-27 Eastman Kodak Co High temperature processing of exposed photographic elements

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