US2108243A - Photographic developer - Google Patents

Photographic developer Download PDF

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Publication number
US2108243A
US2108243A US90919A US9091936A US2108243A US 2108243 A US2108243 A US 2108243A US 90919 A US90919 A US 90919A US 9091936 A US9091936 A US 9091936A US 2108243 A US2108243 A US 2108243A
Authority
US
United States
Prior art keywords
developer
photographic
photographic developer
phenylenediamine
water
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
US90919A
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English (en)
Inventor
Wendt Bruno
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 US2108243A publication Critical patent/US2108243A/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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/407—Development processes or agents therefor
    • G03C7/413—Developers
    • G03C7/4136—Developers p-Phenylenediamine or derivatives thereof

Definitions

  • My present invention relatesjo a photographic naphthalene-Z-carboxylic acid for the production developer and more particularly to a developer of a blue color.
  • One of its objects is to provide an improved Emmple 1 5 developer.
  • Another object is to provide an improved developer for development in colors.
  • Fur- A developer consisting of: ther objects will be seen from the detailed. specification following hereaften 10.9 grams of unsymmetrical N.N-d1-(hydroxy- Para-phenylenediamine is used as a fine-grain 60 gg gg 'gi zgggm ggfgg gfig developer and derivatives of para-phenylenediamine have been proposed as developers.
  • the lat- 1000 of water ter compounds however, have not beeen introyields a 'y-value of 0.6 after minutes in a given Jerusalem into photographic practice because their emulsion.
  • This invention relates to a process of photographic development in which N-hydroxyalkylg :22: g; gggi ggfi iffig figi ated para-phenylenediamines are used as developers.
  • suitable compounds are un- 1000 of water symmetrical dihydroxydiethylpara-phenylenediand containing the same number of molecules of amine, methyl-hydroxyethylethyl-hydroxythe developing substance, yields in the same given ethyl-, butyl hydroxyethyl para phenylenediemulsion a 'y-value of 0.6 only after 75 minutes.
  • the unsymmetrical dihydroxy-diethyl-para- 10 grams of 2-amino-5-(N-hydroxyethyl-N- butyl) -amino-toluene-dihydrochloride phenylenediamine may be made from dihydroxy- Example 3 diethyl-aniline by converting the latter into its 9,0 grams of N ethyl N hydroxyethy] p nitroso-derivative and reducing the nitrosophenylene-djamine roup.
  • the developers have particularly good solubility, which is to be attributed to the hydroxyalkyl- First solution; group. Furthermore, the developers are particularly useful for development in color, since they gram N'Ndi'mydmxyethm) have the advantage over the normal alkyl-derivaene'dmmme tives that they yield purer and brighter colors.
  • Example 4 For the purpose of development in color there second solution; may be added to the developer besides the devel- J oping substance, substances which have a tendgram of phenyl-methyl-pyrazolone ency to produce dyestuffs during the development grams of anhydrous Sodium b nate by oxidation of the developer, for instance, a de- 100 of Waterrivative of acylacetic acid ester for the produc- Example 5 tion of a yellow color, pyrazolones for the production of a red color, and a derivative of l-hydroxy- First solution:
  • a photographic developer comprising an N- hydroxyalkylated'p-phenylenediamine.
  • a photographic developer comprising an N- hydroxyalkylated p-phenylenediamine and a compound capable of forming a dye with the oxidation products or the developer.
  • a photographic developer comprising unsymmetrical N.N di-(hydroxyethyl) -p-phenylenediamine.
  • a photographic developer comprising N- ethyl-N-hydroxyethyl-p-phenylenediamine, anhydrous sodium sulfite, potassium bromide and water.

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)
US90919A 1935-07-24 1936-07-16 Photographic developer Expired - Lifetime US2108243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF3216D DE889549C (de) 1935-07-24 1935-07-24 Photographischer Entwickler

Publications (1)

Publication Number Publication Date
US2108243A true US2108243A (en) 1938-02-15

Family

ID=27815498

Family Applications (1)

Application Number Title Priority Date Filing Date
US90919A Expired - Lifetime US2108243A (en) 1935-07-24 1936-07-16 Photographic developer

Country Status (7)

Country Link
US (1) US2108243A (fr)
AT (1) AT151322B (fr)
BE (1) BE416619A (fr)
DE (1) DE889549C (fr)
FR (1) FR808377A (fr)
GB (1) GB460580A (fr)
NL (1) NL44835C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596978A (en) * 1947-09-17 1952-05-20 Searle & Co 8-hydroxy-1, 2, 3, 4-tetrahydroquinoline as a silver halide developer
US2611785A (en) * 1952-09-23 N-substituted x
US3884627A (en) * 1971-10-04 1975-05-20 Clairol Inc Oxidative hair dye compositions
US5380625A (en) * 1992-02-05 1995-01-10 Fuji Photo Film Co., Ltd. Method for processing silver halide color photographic materials comprising particular dye couplers using particular developers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611785A (en) * 1952-09-23 N-substituted x
US2596978A (en) * 1947-09-17 1952-05-20 Searle & Co 8-hydroxy-1, 2, 3, 4-tetrahydroquinoline as a silver halide developer
US3884627A (en) * 1971-10-04 1975-05-20 Clairol Inc Oxidative hair dye compositions
US5380625A (en) * 1992-02-05 1995-01-10 Fuji Photo Film Co., Ltd. Method for processing silver halide color photographic materials comprising particular dye couplers using particular developers

Also Published As

Publication number Publication date
GB460580A (en) 1937-01-29
AT151322B (de) 1937-11-10
NL44835C (fr)
DE889549C (de) 1953-09-10
FR808377A (fr) 1937-02-04
BE416619A (fr)

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