US2146040A - Development of silver halide emulsions in color - Google Patents

Development of silver halide emulsions in color Download PDF

Info

Publication number
US2146040A
US2146040A US74816A US7481636A US2146040A US 2146040 A US2146040 A US 2146040A US 74816 A US74816 A US 74816A US 7481636 A US7481636 A US 7481636A US 2146040 A US2146040 A US 2146040A
Authority
US
United States
Prior art keywords
silver halide
color
development
halide emulsions
methylaminophenol
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
US74816A
Other languages
English (en)
Inventor
Wilmanns Gustav
Bitterfeld Wolfen Kreis
Schneider Wilhelm
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 US2146040A publication Critical patent/US2146040A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/26—Silver halide emulsions for subtractive colour processes
    • 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
    • G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring

Definitions

  • Our present invention relates to development of silver halide emulsions in color.
  • One of its objects is to provide a process of developing silver halide emulsions in color.
  • silver halide layers can be developed in colors.
  • para-aminophenol or dialkyll0 amino-aniline in admixture with phenol, aniline or such substances as contain a methylene-group capable of reaction.
  • the picture obtained contains silver and the dyestuff, the latter being a quinone-imine dyestufi or an azomethine, accordla ing to the nature of the selected components.
  • Another process consists in using certain polyhydric phenols, such as pyrocatechol or pyrogallol, in an alkaline solution without a sulphite. Both processes suffer from the disadvantage that the solutions have little stability; moreover, the last-named developers give tints which are not very pleasing.
  • the present invention depends on the observation that very beautiful pictures in colors are obtained when an ortho-methyl-aminophenol or a. substitution product thereof acts on the silver halide layer in a solution alkaline with alkali carbonate or caustic alkali. After separating the silver, for example with farmers reducer.
  • the substituents may be alkyl, such as methyl or ethyl, halogen, alkoxy, such as methoxy or ethoxy, or an aminogroup, or a. dialkyl amino-group, such as a dimethylamino-group or a diethylamlnogroup.
  • the compounds containing halogen as a substituent have proved to give the best effect.
  • Suitable ortho-methylaminophenols are, for instance, ortho-methylaminophenol giving a yellow color, 4-chlor-ortho-methylaminophenol giving a brown color, 5-chlor-ortho-methylaminophenol and 4,5-dimethyl-ortho-methylaminophenol giving a yellow color, 4-chlor-6-aminoortho-methylaminophenol giving a brown color,
  • a process of developing an exposed silver halide emulsion in color which comprises depositing a dyestuif on the exposed silver halide by treating the exposed silver halide emulsion with a developing solution consisting of an orthomethylaminophenol, water and an alkali selected from the class consisting of alkali carbonates and caustic alkalies.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US74816A 1935-04-17 1936-04-16 Development of silver halide emulsions in color Expired - Lifetime US2146040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0052145 1935-04-17

Publications (1)

Publication Number Publication Date
US2146040A true US2146040A (en) 1939-02-07

Family

ID=7193266

Family Applications (1)

Application Number Title Priority Date Filing Date
US74816A Expired - Lifetime US2146040A (en) 1935-04-17 1936-04-16 Development of silver halide emulsions in color

Country Status (4)

Country Link
US (1) US2146040A (xx)
BE (1) BE414966A (xx)
ES (1) ES142001A1 (xx)
FR (1) FR804649A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506622A (en) * 1944-03-11 1950-05-09 Technicolor Motion Picture Elimination of preservative sulfite from photographic developers prior to use in color development
US3077402A (en) * 1954-12-06 1963-02-12 Polaroid Corp Photographic color processes, products, and compositions
US4342818A (en) * 1979-12-25 1982-08-03 Fuji Photo Film Co., Ltd. Process for forming color filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506622A (en) * 1944-03-11 1950-05-09 Technicolor Motion Picture Elimination of preservative sulfite from photographic developers prior to use in color development
US3077402A (en) * 1954-12-06 1963-02-12 Polaroid Corp Photographic color processes, products, and compositions
US4342818A (en) * 1979-12-25 1982-08-03 Fuji Photo Film Co., Ltd. Process for forming color filter

Also Published As

Publication number Publication date
FR804649A (fr) 1936-10-28
ES142001A1 (es) 1936-08-01
BE414966A (xx)

Similar Documents

Publication Publication Date Title
US2367531A (en) Acylaminophenol photographic couplers
US2279406A (en) Color process using cellulose ester emulsions
US2336327A (en) Preventing color stain in photographic emulsions
US3146102A (en) Photographic multicolor diffusion transfer process using dye developers
US2323503A (en) Methylene bis-azoles
GB507841A (en) Process of producing coloured images in multilayer photographic elements
US2146040A (en) Development of silver halide emulsions in color
US2373821A (en) Production of color photographic images
US2357395A (en) Photographic emulsion
GB662360A (en) Improvements in photographic processes and materials therefor
US2536010A (en) Preparation of azine dyestuff images
US2640776A (en) Sensitized photographic emulsion containing color couplers
US2320418A (en) Color photographs
US2186733A (en) Color photography
US2694636A (en) Light-sensitive element for color photography
US2271230A (en) Sulphonamides of dyes
US2313138A (en) Production of color photographic images
US2805158A (en) Process for colour photography
US2688538A (en) Photographic elements and process of color correction utilizing styryl dyes as couplers
US2396396A (en) Production of colored photographic images
US2163820A (en) Photographic developer
GB511770A (en) Improvements in colour photography
US2186730A (en) Multicolor photography
US2186719A (en) Photographic silver halide emulsions
GB475191A (en) Production of multi-colour photographic pictures