GB261201A - Improved method of and means for reducing photographic negatives, positives, films, bromide and gaslight prints - Google Patents

Improved method of and means for reducing photographic negatives, positives, films, bromide and gaslight prints

Info

Publication number
GB261201A
GB261201A GB3085825A GB3085825A GB261201A GB 261201 A GB261201 A GB 261201A GB 3085825 A GB3085825 A GB 3085825A GB 3085825 A GB3085825 A GB 3085825A GB 261201 A GB261201 A GB 261201A
Authority
GB
United Kingdom
Prior art keywords
prints
gaslight
positives
bromide
films
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
GB3085825A
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.)
KARL EMIL TAESCHNER
Original Assignee
KARL EMIL TAESCHNER
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 KARL EMIL TAESCHNER filed Critical KARL EMIL TAESCHNER
Publication of GB261201A publication Critical patent/GB261201A/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
    • G03C5/42—Reducing; Intensifying

Abstract

261,201. Taeschner, K. E. Dec. 7, 1925. Reducing intensity.-To effect reduction without destroying delicate half tones, negatives or prints are treated in a reducing bath containing iodine and potassium iodide, and either simultaneously or previously with a hardening agent of bichromate of potash or a bichromate or chromate of any other alkali, Sugar may also be added and the substances may be brought into solution in the form of an intimately triturated powdermixture. An acid fixing bath is used. Specific examples of baths are given.
GB3085825A 1924-08-15 1925-12-07 Improved method of and means for reducing photographic negatives, positives, films, bromide and gaslight prints Expired GB261201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0048599 1924-08-15

Publications (1)

Publication Number Publication Date
GB261201A true GB261201A (en) 1926-11-18

Family

ID=7383184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3085825A Expired GB261201A (en) 1924-08-15 1925-12-07 Improved method of and means for reducing photographic negatives, positives, films, bromide and gaslight prints

Country Status (1)

Country Link
GB (1) GB261201A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467359A (en) * 1946-01-23 1949-04-12 Rubinstein Leon Photographic oxidizers and resists
US2476544A (en) * 1944-11-17 1949-07-19 Gen Aniline & Film Corp Antistain agents for silver bleach solutions
US2668763A (en) * 1949-04-11 1954-02-09 Nonacid photogeaphic oxidizers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476544A (en) * 1944-11-17 1949-07-19 Gen Aniline & Film Corp Antistain agents for silver bleach solutions
US2467359A (en) * 1946-01-23 1949-04-12 Rubinstein Leon Photographic oxidizers and resists
US2668763A (en) * 1949-04-11 1954-02-09 Nonacid photogeaphic oxidizers

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