GB306026A - Process for the production of multi-coloured transparencies or diapositives, especially applicable to cinematograph films - Google Patents

Process for the production of multi-coloured transparencies or diapositives, especially applicable to cinematograph films

Info

Publication number
GB306026A
GB306026A GB1805/29A GB180529A GB306026A GB 306026 A GB306026 A GB 306026A GB 1805/29 A GB1805/29 A GB 1805/29A GB 180529 A GB180529 A GB 180529A GB 306026 A GB306026 A GB 306026A
Authority
GB
United Kingdom
Prior art keywords
negative
colour
printing
positive
positives
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
GB1805/29A
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 GB306026A publication Critical patent/GB306026A/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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/46—Subtractive processes not covered by the group G03C7/26; Materials therefor; Preparing or processing such materials

Abstract

306,026. Wahl, K. Feb. 14, 1928, [Convention date]. Colour photographh. - Transparent colour positives are produced from a single negative on a support coated on both sides with a non-silver sensitizing material capable of being differentially hardened, for example, bichromated colloid. According to one method, the film is exposed on one side to a negative and the other side to a positive made from said negative, printing being in register and a light absorbing intermediate layer being provided to prevent penetration of the copying light. Each side is then coloured separately. With a black and white negative, a two colour positive is obtained. With a halftone negative blends of colours are obtainable where the half-tones overlap. In a modified process, the negative and or positive for printing may be differentially hardened colloid images independently obtained from a single original negative. In the Specification as open to inspection under Sect. 91 (3) (a) colour negatives or positives therefrom or selections of these may be used for printing on opposite sides. This subject-matter does not appear in the Specification as accepted.
GB1805/29A 1928-02-14 1929-01-18 Process for the production of multi-coloured transparencies or diapositives, especially applicable to cinematograph films Expired GB306026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE306026X 1928-02-14

Publications (1)

Publication Number Publication Date
GB306026A true GB306026A (en) 1930-05-19

Family

ID=6120992

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1805/29A Expired GB306026A (en) 1928-02-14 1929-01-18 Process for the production of multi-coloured transparencies or diapositives, especially applicable to cinematograph films

Country Status (1)

Country Link
GB (1) GB306026A (en)

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