US1564161A - Method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate - Google Patents

Method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate Download PDF

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Publication number
US1564161A
US1564161A US1989A US198925A US1564161A US 1564161 A US1564161 A US 1564161A US 1989 A US1989 A US 1989A US 198925 A US198925 A US 198925A US 1564161 A US1564161 A US 1564161A
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US
United States
Prior art keywords
sensitizing
bichromate
kinofilms
procedure
solutions
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
US1989A
Inventor
Weingarten Alfred
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.)
Individual
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Individual
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Filing date
Publication date
Priority to DEW65197D priority Critical patent/DE427082C/en
Priority to FR591243D priority patent/FR591243A/en
Priority to AT104145D priority patent/AT104145B/de
Priority to GB313/25A priority patent/GB227130A/en
Application filed by Individual filed Critical Individual
Priority to US1989A priority patent/US1564161A/en
Application granted granted Critical
Publication of US1564161A publication Critical patent/US1564161A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates to a method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate.
  • This invention has the advantage, that accor ing to the new mode of procedure the duration of exposing to the light can be considerably reduced, and the durability ofjthe sensitized film d'f gelatine is raised in comparison with the known methods of sensitizing by means of bichromates, as applicant has observed.
  • the-procedure consists in sensitizing by ans of a solution of bichromate the first celluloidlayer coated with a layer of elatine.
  • th1s layer is bathed in a solution of potassium bichromate, potassium ferro Application filed January 15 1925. serial No. 1,959.
  • cyanide and potassium bromide for in.- stancef0r 1 liter of solution parts of potassium bichromate, 5 parts potassium ferro-cyanide and 5 .parts potassium bro- 80 mide.
  • solutlon may be added to the colloid, before the latter is brought up to the celluloid band.
  • the sensitized layer is exposed tothe light, washed by means of cold water and, then, developed in warm water, eventually upon previous colouring.
  • the development can be obtained in a known manner without warm water; i. e. in a cold way.
  • the not exposed gelatine swells, then, in such a measure, that the image becomes visible in the wet state.
  • What I claim is A method of sensitizing kinofilms for positive copies, consisting in bathing the colloid in a solution of potassium bichr'omate, potassium ferro-cyanide and potassium bromide.

Description

F atented Dec. 1,1925.
UNITED .ST-ATES PATENT OFFICE;
ALFRED WEINGARTEN, OF BERLIN, GERMANY.
METHOD OF PROCEDURE FOR SENSITIZING KINOFILMS FOR POSITIVE COPIES BY MEANS OF SOLUTIONS OF BIGHROMATE.
No Drawing.
To all whom it may concern: Be it known that I, ALFRED WEINGARTEN, a citizen of Poland, residing at Berlin, Germany, have invented new. and useful im -provements in methods of procedurefor sensitizing kinofilms for positive copies by means of solutions of bichromate, of which the following is a specification.
This invention relates to a method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate. In comparison with the present state of technics th1sv rocedure has the advantage, that accor ing to the new mode of procedure the duration of exposing to the light can be considerably reduced, and the durability ofjthe sensitized film d'f gelatine is raised in comparison with the known methods of sensitizing by means of bichromates, as applicant has observed.
Essentially the-procedure consists in sensitizing by ans of a solution of bichromate the first celluloidlayer coated with a layer of elatine. Accordi to the invention th1s layer is bathed in a solution of potassium bichromate, potassium ferro Application filed January 15 1925. serial No. 1,959.
cyanide and potassium bromide (for in.- stancef0r 1 liter of solution parts of potassium bichromate, 5 parts potassium ferro-cyanide and 5 .parts potassium bro- 80 mide). But the solutlon may be added to the colloid, before the latter is brought up to the celluloid band. Thereupon the sensitized layer is exposed tothe light, washed by means of cold water and, then, developed in warm water, eventually upon previous colouring. With certain colloids the development can be obtained in a known manner without warm water; i. e. in a cold way. The not exposed gelatine swells, then, in such a measure, that the image becomes visible in the wet state.
What I claim is A method of sensitizing kinofilms for positive copies, consisting in bathing the colloid in a solution of potassium bichr'omate, potassium ferro-cyanide and potassium bromide.
Intestimony -whereof I have signed my name to this-specification.
ALFRED WEINGARTEN.
US1989A 1924-01-05 1925-01-12 Method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate Expired - Lifetime US1564161A (en)

Priority Applications (5)

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
FR591243D FR591243A (en) 1924-01-05 1924-12-30 Film manufacturing process
AT104145D AT104145B (en) 1924-01-05 1924-12-31
GB313/25A GB227130A (en) 1924-01-05 1925-01-05 Improved process for the manufacture of photographic films
US1989A US1564161A (en) 1924-01-05 1925-01-12 Method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate

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
US1564161A true US1564161A (en) 1925-12-01

Family

ID=27789677

Family Applications (1)

Application Number Title Priority Date Filing Date
US1989A Expired - Lifetime US1564161A (en) 1924-01-05 1925-01-12 Method of procedure for sensitizing kinofilms for positive copies by means of solutions of bichromate

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663640A (en) * 1949-10-24 1953-12-22 Keuffel & Esser Comp Photographically light-sensitive silver halide-diazide colloid layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663640A (en) * 1949-10-24 1953-12-22 Keuffel & Esser Comp Photographically light-sensitive silver halide-diazide colloid layers

Also Published As

Publication number Publication date
AT104145B (en) 1926-09-10
GB227130A (en) 1925-08-13
DE427082C (en) 1926-03-23
FR591243A (en) 1925-06-30

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