AT104145B - - Google Patents

Info

Publication number
AT104145B
AT104145B AT104145DA AT104145B AT 104145 B AT104145 B AT 104145B AT 104145D A AT104145D A AT 104145DA AT 104145 B AT104145 B AT 104145B
Authority
AT
Austria
Prior art keywords
sensitizing
solution
desc
potassium
potassium bromide
Prior art date
Application number
Other languages
German (de)
Original Assignee
Westland - Film G. M. B. H.
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 Westland - Film G. M. B. H. filed Critical Westland - Film G. M. B. H.
Application granted granted Critical
Publication of AT104145B publication Critical patent/AT104145B/de

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
    • G03C1/00—Photosensitive materials
    • G03C1/66—Compositions containing chromates as photosensitive substances
    • 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
    • Y10S430/135—Cine film
    • 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
    • Y10S430/141—Direct positive material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Description

       

   <Desc/Clms Page number 1> 
 



  VerfahrenzumSensibilisierenvonFilmen. 



   Die Erfindung betrifft ein Verfahren zur Sensibilisierung von Filmen und hat gegenüber dem Stande der Technik den Vorteil, dass nach dem neuen Verfahren die Belichtungsdauer erheblich herabgesetzt wird. 



   Das Verfahren besteht im wesentlichen darin, dass man die in bekannter Weise mit einer Gelatine- 
 EMI1.1 
 wird eine Lösung von   Kaliumbichromat,     Fenizyanid   und Bromkalium zugesetzt (z. B. auf 1 Liter Lösung 30 Teile Bichromat, 5 Teile Ferrizyanid und 5 Teile Bromkali). Das kann schon geschehen, bevor die Schicht auf das   Zelluloidband aufgebracht   wird, oder nachdem diese Schicht auf der Unterlage angeordnet ist. Die Unterlage mit der Emulsion wird dann belichtet, in warmem Wasser ausgewaschen, gegebenenfalls gefärbt, und das   Filmband   ist feltig. Man kann die Entwicklung auch in bekannter Weise ohne warmes Wasser, also kalt, vornehmen ; dann quillt die unbelichtet Gelatine so stark an, so dass das Bild schon in nassem Zustande sichtbar ist. 



   Der Zusatz von Bromsalzen bei Herstellung einer Emulsion für lichtempfindliche Platten ist bekannt (österr. Patentschrift 12429), ebenso der Zusatz von   Halogensalzen und Fenisalzen zu   Chrom- 
 EMI1.2 
 schrift 33377). 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for sensitizing films.



   The invention relates to a method for sensitizing films and has the advantage over the prior art that the exposure time is considerably reduced according to the new method.



   The process consists essentially in the fact that the in a known manner with a gelatin
 EMI1.1
 a solution of potassium bichromate, fenizyanide and potassium bromide is added (e.g. 30 parts of bichromate, 5 parts of ferricyanide and 5 parts of potassium bromide to 1 liter of solution). This can be done before the layer is applied to the celluloid tape or after this layer has been arranged on the base. The substrate with the emulsion is then exposed, washed out in warm water, colored if necessary, and the film tape is felt-like. The development can also be carried out in a known manner without warm water, i.e. cold; then the unexposed gelatine swells so much that the image is visible even when it is wet.



   The addition of bromine salts in the production of an emulsion for photosensitive plates is known (Austrian patent specification 12429), as is the addition of halogen salts and fenis salts to chromium
 EMI1.2
 scripture 33377).

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Verfahren zum Sensibilisieren von Kinofilmen für Positivkopien, welche aus einem Zelluloidband mit einer Gummi-oder Gelatineschicht bestehen, dadurch gekennzeichnet, dass das Kolloid mit einer Lösung von Kaliumbichromat, Ferrizyanid und Bromkalium lichtempfindlich gemacht wird. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for sensitizing cinema films for positive copies, which consist of a celluloid tape with a rubber or gelatin layer, characterized in that the colloid is made photosensitive with a solution of potassium dichromate, ferricyanide and potassium bromide. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT104145D 1924-01-05 1924-12-31 AT104145B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEW65197D DE427082C (en) 1924-01-05 1924-01-05 Process for sensitizing cinema films for positive copies with chromate solutions
US1989A US1564161A (en) 1924-01-05 1925-01-12 Method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate

Publications (1)

Publication Number Publication Date
AT104145B true AT104145B (en) 1926-09-10

Family

ID=27789677

Family Applications (1)

Application Number Title Priority Date Filing Date
AT104145D AT104145B (en) 1924-01-05 1924-12-31

Country Status (5)

Country Link
US (1) US1564161A (en)
AT (1) AT104145B (en)
DE (1) DE427082C (en)
FR (1) FR591243A (en)
GB (1) GB227130A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE838688C (en) * 1949-10-24 1952-05-12 Kalle & Co Ag Light sensitive silver halide colloid layers for tanning development

Also Published As

Publication number Publication date
DE427082C (en) 1926-03-23
FR591243A (en) 1925-06-30
GB227130A (en) 1925-08-13
US1564161A (en) 1925-12-01

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