GB335930A - Improvements in or relating to the mordanting of photographic silver images - Google Patents

Improvements in or relating to the mordanting of photographic silver images

Info

Publication number
GB335930A
GB335930A GB2025429A GB2025429A GB335930A GB 335930 A GB335930 A GB 335930A GB 2025429 A GB2025429 A GB 2025429A GB 2025429 A GB2025429 A GB 2025429A GB 335930 A GB335930 A GB 335930A
Authority
GB
United Kingdom
Prior art keywords
silver
mordanting
iodide
complex
compounds
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
GB2025429A
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
Priority to GB2025429A priority Critical patent/GB335930A/en
Publication of GB335930A publication Critical patent/GB335930A/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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/48—Mordanting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

335,930. Lierg, F. July 2, 1929. Toning; reversing.-In a process of mordanting photographic silver images, the existing opaque compounds e.g. silver, silver bromide, are converted into transparent complex compounds having powerful mordanting properties by bathing in a complex-forming solvent, e.g. a metallic iodide, urea, a thiocyanate or a thiocarbamide. In one example, the black silver image is treated with a bleaching solution containing potassium ferricyanide and calcium iodide, the double compound, silver iodide-calcium iodide, being formed immediately. Agents which are transformed into new compounds with the complex former, e.g. bisulphites, may be added to the bleaching solution. In another example, in carrying out the reversal process, the silver bromide present is converted into a dye mordant and dyed black, the silver image being afterwards removed. Specifications 100,098, 113,617; 160,137, 245,163, 279,381, and 333,697 are referred to.
GB2025429A 1929-07-02 1929-07-02 Improvements in or relating to the mordanting of photographic silver images Expired GB335930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2025429A GB335930A (en) 1929-07-02 1929-07-02 Improvements in or relating to the mordanting of photographic silver images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2025429A GB335930A (en) 1929-07-02 1929-07-02 Improvements in or relating to the mordanting of photographic silver images

Publications (1)

Publication Number Publication Date
GB335930A true GB335930A (en) 1930-10-02

Family

ID=10142929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2025429A Expired GB335930A (en) 1929-07-02 1929-07-02 Improvements in or relating to the mordanting of photographic silver images

Country Status (1)

Country Link
GB (1) GB335930A (en)

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