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
  • G03C1/00—Photosensitive materials
  • G03C1/52—Compositions containing diazo compounds as photosensitive substances
  • G03C1/58—Coupling substances therefor

Definitions

• This invention relates to a process for preparing diazotypes.
• the primary object of this invention is to provide a color coupler to be used in the preparation of diazotypes which is of great effectiveness.
• R represents aryl, alkyl or aralkyl
• X represents H, aryl, alkyl, aralkyl, acyl or a hydroaromatic residue
• Y represents H, aryl, alkyl, aralkyl, acyl or a hydroaromatic residue.
• I employ N- acetonyl-pyridinium chloride as a coupler.
• my new coupling component is its great solubility and its quality of rapidly coupling and giving very intense dyestuffs with the usual diazo compounds.
• the coupling element of my invention may be used singly or in any combination. Whenused in mixtures, diazotypes of very intense neutral color are obtained whereas, for instance, the use of phloroglucinol alone produces only a brown violet color.
• EwampZe.-To a suitable paper is applied a solution of 1.5 g. of diazonium compound from p-diethylamino aniline, 1 g. of tartaric acid, 0.8 g. of aluminum sulphate, 0.15 g. of phloroglucinol and 0.08 g. of N-acetonylpyridinium chloride in cm. of water.
• the paper is exposed through a diapositive and developed in an ammoniacal atmosphere.
• the paper is exposed through a diapositive and developed in an ammoniacal atmosphere. A dark magenta print is obtained.
• My new coupling component may be added either to the developer when the half-wet process is used, or to a solution which contains one or more diazo compounds and which is applied as light-sensitive layer to an adapted paper.
• the method which comprises selectively exposing a lightsensitive material containing a light-sensitive diazo compound, and coupling the diazo compound retained in the unexposed areas with N- acetonyl-pyridinium chloride.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=3866827

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (2)

Citations (6)

• 0
  • NL NL62542D patent/NL62542C/xx active
• 1945
  • 1945-08-03 BE BE459543D patent/BE459543A/xx unknown
• 1946
  • 1946-07-24 FR FR931187D patent/FR931187A/fr not_active Expired
  • 1946-07-29 US US686951A patent/US2531091A/en not_active Expired - Lifetime
  • 1946-08-01 GB GB22906/46A patent/GB617115A/en not_active Expired
  • 1946-08-02 CH CH266905D patent/CH266905A/fr unknown
• 1947
  • 1947-01-03 ES ES176413A patent/ES176413A1/es not_active Expired

Patent Citations (6)

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