US2181941A - Photographic developer - Google Patents

Photographic developer Download PDF

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Publication number
US2181941A
US2181941A US178726A US17872637A US2181941A US 2181941 A US2181941 A US 2181941A US 178726 A US178726 A US 178726A US 17872637 A US17872637 A US 17872637A US 2181941 A US2181941 A US 2181941A
Authority
US
United States
Prior art keywords
developers
developer
photographic
photographic developer
agents
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 - Lifetime
Application number
US178726A
Other languages
English (en)
Inventor
Goldacker Paul
Maiser Georg
Schmitz-Hillebrecht Ernst
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.)
GAF Chemicals Corp
Original Assignee
Agfa Ansco Corp
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 Agfa Ansco Corp filed Critical Agfa Ansco Corp
Application granted granted Critical
Publication of US2181941A publication Critical patent/US2181941A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C5/305—Additives other than developers

Definitions

  • the present invention relates to photographic developers.
  • alkaline developers For the development of latent photographic images, especially in halide silver emulsions, alkaline developers have long been used.
  • the alkalinity of these developers consisting of a mixture of several substances normally is due to the presence of an alkali hydroxide or an alkali carbonate.
  • :n being at least 1) alsoh ave a strong alkalinity and a tendency to absorb carbon dioxide. Moreover, all of these agents which are preferable for the purpose are liquid and many have a disagreeable odor and therefore are not suitable for the production of developing commercial use.
  • R1 H or aralkyl or alkyl or hydroxyalkyl or p ly ydr va y
  • the hydroxyl groups may be free or etherifled or esterified; internal ethers are also useful. It is necessary that the compound should'be well soluble in water.
  • Such polyhydroxyalkylamines are especially amino-derivatives of the sugars and carbohydrates having 5 and 6 carbon atoms but also lower and higher homologues may be used.
  • the carbon atoms combined with the hydroxyl groups may also be separated by one or more C-atoms without a hydroxyl group.
  • glucamine methyl-, ethyl-, propyl-, dodecyl-glucamine, mannamine, galactamine, lactamine, fructamine, arabinamine, xylamine, 1- or v2-aminopropane diol.
  • These bodies may be used in all kinds of known developers, for example rapid developers, fine grain developers, blue and brown tint developers, negative developers, positive developers, paper developers, reversal developers, and color developers used in the color development processes.
  • Photographic developer comprising develop D sodium sm'fite 60 ing agents and an aliphatic hydroxyalkylamine mctamine d0 80 containing in its molecule at least one alkyl chain Potassium bromide do 2 having at least two hydroxyl groups combined "f with difierent carbon atoms.
  • Photographic-developer comprising developing agents and mannamine. I I l 7 Soft workmg 3. Photographic developer. comprising develop- Water cc 1000 ing agents and lactamine.
  • Photographic developer comprising developams" 15 lng agents and methylglucamine. Dry sodium sulfite do PAUE GOLDACKER. Xylamine dn GEORGMAISER. Potassium bromide do 2 ERNST SCHMITZ-HILLEBRECHT.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US178726A 1936-12-14 1937-12-08 Photographic developer Expired - Lifetime US2181941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0056606 1936-12-14

Publications (1)

Publication Number Publication Date
US2181941A true US2181941A (en) 1939-12-05

Family

ID=7194393

Family Applications (1)

Application Number Title Priority Date Filing Date
US178726A Expired - Lifetime US2181941A (en) 1936-12-14 1937-12-08 Photographic developer

Country Status (5)

Country Link
US (1) US2181941A (fr)
BE (1) BE425071A (fr)
CH (1) CH201308A (fr)
FR (1) FR830642A (fr)
GB (1) GB488374A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482546A (en) * 1948-07-09 1949-09-20 Gen Aniline & Film Corp Phenoxyalkylamines as accelerators for photographic developers
US5523478A (en) * 1992-05-11 1996-06-04 Albright & Wilson Limited Carbohydrate-derived surfactants and their precursors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482546A (en) * 1948-07-09 1949-09-20 Gen Aniline & Film Corp Phenoxyalkylamines as accelerators for photographic developers
US5523478A (en) * 1992-05-11 1996-06-04 Albright & Wilson Limited Carbohydrate-derived surfactants and their precursors
US5710332A (en) * 1992-05-11 1998-01-20 Albright & Wilson Limited Carbohydrate-derived surfactants and their precursors

Also Published As

Publication number Publication date
FR830642A (fr) 1938-08-04
BE425071A (fr)
GB488374A (en) 1938-07-06
CH201308A (de) 1938-11-30

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