US2892714A - Photographic color development with pyrazoline developers - Google Patents

Photographic color development with pyrazoline developers Download PDF

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Publication number
US2892714A
US2892714A US520608A US52060855A US2892714A US 2892714 A US2892714 A US 2892714A US 520608 A US520608 A US 520608A US 52060855 A US52060855 A US 52060855A US 2892714 A US2892714 A US 2892714A
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US
United States
Prior art keywords
amino
pyrazoline
color
developers
color development
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
US520608A
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English (en)
Inventor
Wahl Ottmar
Mersch Rudolf
Puschel Walter
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.)
Agfa Gevaert NV
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Agfa AG
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Publication date
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Publication of US2892714A publication Critical patent/US2892714A/en
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29Development processes or agents therefor
    • G03C5/30Developers
    • G03C5/3028Heterocyclic compounds
    • G03C5/3035Heterocyclic compounds containing a diazole ring

Definitions

  • the present invention relates to a process for the production of photographic color images by color development and more especially to such processes in which 1-(4'-aminophenyl)-3-amino-pyrazolines are used as color forming developing substances.
  • Examples of such compounds are: 1-(4'-amino- 3' methoxyphenyl) 3 aminopyrazoline dihydrochloride, 1 (4 amino 3 methylphenyl) 3 aminopyrazolinedihydrochloride, 1 -(4" aminophenyl 2- hydrochloride, 1-(4-amino- I V I inopyrazolinedihydrochloride, (4- amino- 3' ca'rboxyethylphenyl) 3 aminomthyld aminopyrazolin iiyrgfzolinediliydrochldride.
  • l-(p-aminophenyl)-3-aminopyrazoline may be obtained by 1-(p-acylaminophenyl)-3-aminopyrazolines, such as, for example, the acetyl derivative, being subjected to alkali saponification.
  • the derivatives of this compound may be prepared in analogous manner (see in this connection application relating to Process for the production of l-(p-a'rninophenyl)-3-aminopyrazoline Serial No. 515,558 filed June 14, 1955, by Rudolf Mersch and D'e'tlef Delfs, now U. S. Patent 2,840,567, granted June 24, 1958, and assigned to the assignee of the present application.
  • Example 7 of that application discloses that the above acetyl den'vative is made by introducing one mol of N-nitroso- N-'(p'-'acetaminophenyl)-beta amino propionitrile and 200 grams of zinc dust into 2 liters of 10% acetic acid, after the reductionis complete filtering OK the zinc slurry with suction, washing with hot acetic acid and supersaturating the filtrate with acetic acid.
  • the l-(p-acetyl amino phenyl)-3-aminopyrazoline precipitates out in good yield and hasa'i'rieltingpoint of 204 C.
  • Example 1 An exposed photographic silver halide emulsion, in which is incorporated l-(4-sulphophenyl)-3palmity1- pyrazolone(5) as color coupler, was developed in a developer solution of the following composition at 18 to a gamma equal to 0.7
  • Example 2 An exposed photographic silver halide emulsion having incorporated 1-(4-sulphophenyl)-3-palmityl-pyrazolone() as color coupler, was developed in a developer solution of the following composition to a gamma of 0.7:
  • Example 3 1-(4-amino-3'-chloro-phenyl)-3-amino pyrazoline dihydrochloride 3 1.5 Potassium carbonate g 70 Potassium bromide g 2 Sodium sulphite g 3 Water es..- 1
  • the desired gamma was obtained after a development time of 4 minutes; the relative sensitivity was 2.0.
  • Example 4 An exposed photographic silver halide emulsion having incorporated 5-(4'-stearoyl amino benzoyl aceton)- aminoisophthalic acid as color coupler, was developed in a developer solution of the following composition to a gamma of 0.7:
  • Example 5 1-(4'-amino-2-methyl phenyD-3-amino pyrazolinedihydrochloride g 1.2 Potassium carbonate g 70 Potassium bromide E 2 Sodium sulphite "g-.. 3 Water litres..- 1
  • the desired gamma was obtained after a development time of 3 minutes; the relative sensitivity was 2.0.
  • Example 6 An exposed photographic silver halide emulsion having incorporated 1-(4'-sulphophenyl)-3-palmityl-pyrazolone(5) as color coupler was developed in a developer solution of the following composition to a gamma of 0.7:
  • the desired gamma was obtained after a development time of 4 minutes; the relative sensitivity was 2.5.
  • Example 7 An exposed photographic silver halide emulsion having incorporated 1-hydroxy-4-sulfo-2-naphthoic acid stearyl anilide as color coupler was developed in a tie veloper solution of the following composition to a gamma of 0.7:
  • the 1-(4'-aminophenyl)-3-amino-pyrazoline is produced by refluxing 21.8 grams of l-(p-acetoarninophenyl)-3-aminopyrazoline (M.P. 204 C.) with 220 ml. of 5% aqueous sodium hydroxide solution for 6 hours and thereafter cooling the reaction mass. The crystals obtained melt at about C. with decomposition.
  • the l-(p-acetoaminophenyl)-3-aminopyrazoline is prepared in accordance with the disclosure contained in Example 14 of British Patent No. 679,678.
  • a process for the production of colored photo graphic images which comprises providing a photographic silver halide emulsion with a latent image and developing this image with an alkaline aqueous solution of a developer which is essentially a compound of the formula:
  • R stands for a member .of the group consisting of hydrogen, alkyl, alkoxy and halogen, this development being carried out in the presence of a color coupler capable of reacting with the oxidation product of said compound to form a dye.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Plural Heterocyclic Compounds (AREA)
US520608A 1954-07-08 1955-07-07 Photographic color development with pyrazoline developers Expired - Lifetime US2892714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA20693A DE955026C (de) 1954-07-08 1954-07-08 Verfahren zur Herstellung von farbigen Bildern durch Farbentwicklung

Publications (1)

Publication Number Publication Date
US2892714A true US2892714A (en) 1959-06-30

Family

ID=6924750

Family Applications (1)

Application Number Title Priority Date Filing Date
US520608A Expired - Lifetime US2892714A (en) 1954-07-08 1955-07-07 Photographic color development with pyrazoline developers

Country Status (6)

Country Link
US (1) US2892714A (en, 2012)
BE (1) BE539271A (en, 2012)
CH (1) CH336259A (en, 2012)
DE (1) DE955026C (en, 2012)
FR (1) FR1126757A (en, 2012)
GB (1) GB795476A (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212894A (en) * 1960-12-24 1965-10-19 Agfa Ag Non-diffusing magenta color couplers
US3547646A (en) * 1966-12-16 1970-12-15 Keuffel & Esser Co Light-sensitive imaging material containing hydrazones

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533514A (en) * 1947-11-19 1950-12-12 Eastman Kodak Co Photographic emulsions containing color couplers and amide coupler solvents

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB542502A (en) * 1940-07-10 1942-01-13 John David Kendall Improvements in or relating to photographic development processes
DE875048C (de) * 1950-04-06 1953-04-30 Ilford Ltd Verfahren zur Herstellung von 3-Pyrazolidonen
DE870418C (de) * 1950-04-06 1953-03-12 Ilford Ltd Verfahren zur Herstellung von Pyrazolinverbindungen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533514A (en) * 1947-11-19 1950-12-12 Eastman Kodak Co Photographic emulsions containing color couplers and amide coupler solvents

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212894A (en) * 1960-12-24 1965-10-19 Agfa Ag Non-diffusing magenta color couplers
US3547646A (en) * 1966-12-16 1970-12-15 Keuffel & Esser Co Light-sensitive imaging material containing hydrazones

Also Published As

Publication number Publication date
CH336259A (de) 1959-02-15
BE539271A (en, 2012)
FR1126757A (fr) 1956-11-30
DE955026C (de) 1956-12-27
GB795476A (en) 1958-05-21

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