GB255925A - Improvements in and relating to the preparation of photographic developers - Google Patents

Improvements in and relating to the preparation of photographic developers

Info

Publication number
GB255925A
GB255925A GB10756/25A GB1075625A GB255925A GB 255925 A GB255925 A GB 255925A GB 10756/25 A GB10756/25 A GB 10756/25A GB 1075625 A GB1075625 A GB 1075625A GB 255925 A GB255925 A GB 255925A
Authority
GB
United Kingdom
Prior art keywords
soda
relating
preparation
added
photographic developers
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
GB10756/25A
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.)
BORIS MEREJKOVSKY
Original Assignee
BORIS MEREJKOVSKY
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
Priority to CA258966A priority Critical patent/CA258966A/en
Priority to FR600532D priority patent/FR600532A/en
Application filed by BORIS MEREJKOVSKY filed Critical BORIS MEREJKOVSKY
Priority to GB10756/25A priority patent/GB255925A/en
Priority to US26804A priority patent/US1663959A/en
Publication of GB255925A publication Critical patent/GB255925A/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
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • G03C5/3014—Hydrazine; Hydroxylamine; Urea; Derivatives thereof

Landscapes

  • 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

255.925. Schestakoff, P., and Merejkovsky, B. April 24, 1925. No Patent granted (Sealing fee not paid). Developing. - To rectify errors in exposure, ordinary developing compositions have added thereto hydroxylamine sulphonic acids or nitrilosulphonic acid, or salts thereof. As an example hydroxylamine isodisulphonate of soda is added to a developer comprising hydroquinone, sulphite of soda, carbonate of soda, bromide of potassium, and water.
GB10756/25A 1924-05-12 1925-04-24 Improvements in and relating to the preparation of photographic developers Expired GB255925A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA258966A CA258966A (en) 1924-05-12 Photographic developer
FR600532D FR600532A (en) 1924-05-12 1925-04-21 Improvement in the preparation of photographic developers
GB10756/25A GB255925A (en) 1924-05-12 1925-04-24 Improvements in and relating to the preparation of photographic developers
US26804A US1663959A (en) 1924-05-12 1925-04-29 Preparation of photographic developers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA258966T
DE1663959X 1924-05-12
GB10756/25A GB255925A (en) 1924-05-12 1925-04-24 Improvements in and relating to the preparation of photographic developers

Publications (1)

Publication Number Publication Date
GB255925A true GB255925A (en) 1926-07-26

Family

ID=50069349

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10756/25A Expired GB255925A (en) 1924-05-12 1925-04-24 Improvements in and relating to the preparation of photographic developers

Country Status (4)

Country Link
US (1) US1663959A (en)
CA (1) CA258966A (en)
FR (1) FR600532A (en)
GB (1) GB255925A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706157A (en) * 1951-07-21 1955-04-12 Grant Photo Products Inc Processing photographic paper and film
US2938793A (en) * 1957-12-23 1960-05-31 Technical Operations Inc Nitrosodisulfonate latensifier
US3751252A (en) * 1972-03-24 1973-08-07 Eastman Kodak Co Photothermographic element and process
JPS5227638A (en) * 1975-08-27 1977-03-02 Fuji Photo Film Co Ltd Method for stabilization of color developer
DE2744356A1 (en) * 1977-10-01 1979-04-05 Agfa Gevaert Ag PHOTOGRAPHIC REVERSAL WITHOUT A SECOND EXPOSURE
JPS61501343A (en) * 1984-03-02 1986-07-03 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニ− Photographic tanning developer formulations
GB9422109D0 (en) 1994-11-02 1994-12-21 Minnesota Mining & Mfg Black and white photographic elements
US5508155A (en) * 1994-12-22 1996-04-16 Eastman Kodak Company Photographic color developers containing odorless antioxidants formed in situ from reaction of hydroxylamine and epoxide and use of same

Also Published As

Publication number Publication date
FR600532A (en) 1926-02-09
US1663959A (en) 1928-03-27
CA258966A (en) 1926-03-16

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