GB665984A - Improvements in and relating to the manufacture of photographic reversal images - Google Patents

Improvements in and relating to the manufacture of photographic reversal images

Info

Publication number
GB665984A
GB665984A GB26570/47A GB2657047A GB665984A GB 665984 A GB665984 A GB 665984A GB 26570/47 A GB26570/47 A GB 26570/47A GB 2657047 A GB2657047 A GB 2657047A GB 665984 A GB665984 A GB 665984A
Authority
GB
United Kingdom
Prior art keywords
emulsion layer
diffusion
bath
hardened
hypo
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
GB26570/47A
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Publication of GB665984A publication Critical patent/GB665984A/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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/02—Photosensitive materials characterised by the image-forming section
    • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
    • G03C8/06—Silver salt diffusion transfer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

665,984. Photographic processes. GEVAERT PHOTO-PRODUCTEN N.V. Oct. 2, 1947 [Oct. 7, 1946], No. 26570/47. Addition to 654,631. Class 98 (ii). In the process according to the parent Specification, the diffusion of the silver halide and removal of the emulsion layer is performed in a bath containing a gelation-inhibiting agent, e.g. a thiocyanate, an organic sulphonic acid, or ammonium carbonate and a silver halide solvent. Substances restraining diffusion as described in Specification 427,518, chemical toning substances (e.g. selenium compounds), and crystallization-preventing substances containing an ionizable OH-group may also be added to the bath. In example 1, exposed material consisting of a support carrying a hardened receiving layer and an unhardened emulsion layer is developed and then treated in a diffusion bath containing hypo and sodium α-naphthalenesulphonate. The image may be toned in a gold-thiocyanate bath. In example 2, exposed material consisting of a waterproof paper support coated with a hardened receiving layer and an unhardened contrasty emulsion layer is developed in a hydroquinone-KOH developer and is then treated in a diffusion and toning bath containing potassium thiocyanate, hypo, sodium sulphite, and selenium. In example 3, exposed material, according to Specification 654,931, consisting of a support carrying a hardened light-sensitive emulsion containing development nuclei and an unhardened light-sensitive emulsion layer is developed and treated in a bath containing potassium thiocyanate and hypo, The remaining hardened emulsion layer contains a deep-brown positive image separated from the first-formed negative image therein by a small transparent contour line. Specifications 319,077, [Class 98 (ii)], 614,155 and 654,630 also are referred to.
GB26570/47A 1946-10-07 1947-10-02 Improvements in and relating to the manufacture of photographic reversal images Expired GB665984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL128013 1946-10-07

Publications (1)

Publication Number Publication Date
GB665984A true GB665984A (en) 1952-02-06

Family

ID=19750404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26570/47A Expired GB665984A (en) 1946-10-07 1947-10-02 Improvements in and relating to the manufacture of photographic reversal images

Country Status (5)

Country Link
US (1) US2663641A (en)
BE (1) BE476512A (en)
FR (1) FR57717E (en)
GB (1) GB665984A (en)
NL (2) NL60845C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962377A (en) * 1954-10-15 1960-11-29 Polaroid Corp Photographic processes and compositions useful therein
US2834676A (en) * 1955-07-19 1958-05-13 Sperry Rand Corp Photographic diffusion transfer process for producing multiple direct positive copies
BE557693A (en) * 1956-05-23

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1303635A (en) * 1919-05-13 John o
US1285015A (en) * 1915-06-08 1918-11-19 Clarence P Browning Photo-engraving.
FR605883A (en) * 1925-02-09 1926-06-03 Film En Couleurs Keller Dorian Process for developing photographic and cinematographic views, in black and in color
GB317199A (en) * 1928-07-14 1929-08-15 Humphrey Desmond Murray Improvements in and relating to the production of photographic images
DE552434C (en) * 1930-01-14 1932-06-13 Ig Farbenindustrie Ag Process for avoiding air spots in the image layers of photographic materials during treatment in baths of all kinds
DE530337C (en) * 1930-06-05 1931-07-27 Schering Kahlbaum Ag Method of making direct positives using two layers
US1849245A (en) * 1930-07-21 1932-03-15 Eastman Kodak Co Toning bath for photocraphic prints
US1930140A (en) * 1932-01-23 1933-10-10 Eastman Kodak Co Acid hardening fixing bath
BE402030A (en) * 1933-03-22
BE441852A (en) * 1939-11-02
BE444702A (en) * 1941-01-24
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2397016A (en) * 1944-07-25 1946-03-19 Photo Technical Corp Combined developer and fixer
US2440106A (en) * 1946-04-26 1948-04-20 Polaroid Corp Light-polarizing image and methods for forming the same
US2543181A (en) * 1947-01-15 1951-02-27 Polaroid Corp Photographic product comprising a rupturable container carrying a photographic processing liquid

Also Published As

Publication number Publication date
FR57717E (en) 1953-05-04
NL60845C (en)
BE476512A (en)
NL128013B (en)
US2663641A (en) 1953-12-22

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