GB349947A - Improved process for the direct production of photographic positives - Google Patents

Improved process for the direct production of photographic positives

Info

Publication number
GB349947A
GB349947A GB36382/29A GB3638229A GB349947A GB 349947 A GB349947 A GB 349947A GB 36382/29 A GB36382/29 A GB 36382/29A GB 3638229 A GB3638229 A GB 3638229A GB 349947 A GB349947 A GB 349947A
Authority
GB
United Kingdom
Prior art keywords
film
reversal
positives
photographic
reversing
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
GB36382/29A
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.)
Mimosa AG
Original Assignee
Mimosa 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 Mimosa AG filed Critical Mimosa AG
Publication of GB349947A publication Critical patent/GB349947A/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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/95—Photosensitive materials characterised by the base or auxiliary layers rendered opaque or writable, e.g. with inert particulate additives

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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

349,947. Photographic processes. MIMOSA AKT.-GES., 31, Barensteinerstrasse, Dresden, Germany. Nov. 27, 1929, No. 36382. Convention date, Nov. 30, 1928. Void [Published under Sect. 91 of the Acts]. [Class 98 (ii).] Films and papers; reversing.-Direct photographic positives are made by coating a translucent cellulose ester or celluloid film with a sensitive silver emulsion, exposing the film in a camera, developing the image, and reversing it by any of the known chemical reversal processes. Enlargements may be produced directly therefrom by projection on silver halide paper followed by development and reversal. The translucent film may be produced by mixing cellulose nit ate solution with a white, or slightly yellow or pink powder, such as barium sulphate, and casting a film therefrom in known manner. Reference is made in the Specification to a paper for producing direct positives by reversal, coated on both sides with an acid- and waterproof layer of celluloid.
GB36382/29A 1928-11-30 1929-11-27 Improved process for the direct production of photographic positives Expired GB349947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE349947X 1928-11-30

Publications (1)

Publication Number Publication Date
GB349947A true GB349947A (en) 1931-05-26

Family

ID=6259117

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36382/29A Expired GB349947A (en) 1928-11-30 1929-11-27 Improved process for the direct production of photographic positives

Country Status (3)

Country Link
BE (1) BE365762A (en)
FR (1) FR685795A (en)
GB (1) GB349947A (en)

Also Published As

Publication number Publication date
FR685795A (en) 1930-07-17
BE365762A (en) 1929-12-31

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