GB289411A - A process for producing coloured pictures from photographic prints - Google Patents

A process for producing coloured pictures from photographic prints

Info

Publication number
GB289411A
GB289411A GB12247/28A GB1224728A GB289411A GB 289411 A GB289411 A GB 289411A GB 12247/28 A GB12247/28 A GB 12247/28A GB 1224728 A GB1224728 A GB 1224728A GB 289411 A GB289411 A GB 289411A
Authority
GB
United Kingdom
Prior art keywords
print
vehicle
gelatin
silver
under
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
GB12247/28A
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
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB289411A publication Critical patent/GB289411A/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
    • G03C11/00—Auxiliary processes in photography
    • G03C11/18—Colouring
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24909—Free metal or mineral containing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coloring (AREA)
  • Paints Or Removers (AREA)
  • Printing Methods (AREA)

Abstract

289,411. Farmer, E. H. April 26, 1927, [Convention date]. Drawings to Specification. Colouring; catalype, osotype, and contact processes.-A process of producing coloured prints consists in preparing a photographic silver print containing a minimum of colloid vehicle on a support adapted to give a water-colour drawing effect, painting different parts of this print with an excess of different coloured pigments combined with a vehicle containing galatinous material, such as gelatin or glue but excluding gum and casein, subjecting the pigmented vehicle to the action of a tanning agent which reacts on the vehicle in the presence of the photographic image and hardens the vehicle so that the pigments are fixed on the print in proportion to the density of the image, and dissolving away the surplus unhardened vehicle and the pigment carried thereby as with warm water. The under-print may be made as a weak print on plain paper, celluloid &c. sensitized with a thin coating of gelatin and bromide or chloride of silver, and may be developed as with metol-hydroquinone. Ground pigments or water-colours, mixed for example with an aqueous solution of glue, or of gelatin which has been partially hardened with chrome alum, are painted on while the under-print is still damp and preferably warm. The tanning bath may contain bromide, bichromate and ferricyanide of potash, acetic acid, alcohol and water; this bath, in a concentrated form, may be added to the paints before they are applied to the silver print, but it is preferably employed in dilute form after colouring. The surplus unhardened gelatin and its pigment content are removed with warm water, and the print is finally fixed in hypo. The silver under-print may remain, or may be bleached, or entirely removed. The Specification as open to inspection under Sect. 91 (3) (a) states also that if a finished and dried under-print is used, it is bleached with a solution of ferricyanide and bromide of potash, and redeveloped before colouring. This subjectmatter does not appear in the Specification as accepted.
GB12247/28A 1927-04-26 1928-04-26 A process for producing coloured pictures from photographic prints Expired GB289411A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US289411XA 1927-04-26 1927-04-26
US186648A US1669869A (en) 1927-04-26 1927-04-26 Process of producing colored-photographic prints

Publications (1)

Publication Number Publication Date
GB289411A true GB289411A (en) 1928-11-22

Family

ID=78668986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12247/28A Expired GB289411A (en) 1927-04-26 1928-04-26 A process for producing coloured pictures from photographic prints

Country Status (2)

Country Link
US (1) US1669869A (en)
GB (1) GB289411A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543623A (en) * 1948-06-22 1951-02-27 Fischer Frank Method of making multicolor printing plates
US2728158A (en) * 1951-05-02 1955-12-27 Bach Johan Martin Michel Method of producing colored china clay images

Also Published As

Publication number Publication date
US1669869A (en) 1928-05-15

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