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Process for the production of photographic images

Assignee: Agfa Gevaert AG
•
Filing: 1981-09-03
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Granted: 1983-05-31
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Expires: 2001-09-03
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Abstract

Abstract Colored images consisting of metal-complexed azomethine dyes are prepared by chromogenic development of silver halide photographic recording materials in the presence of color couplers. The color developers contain a grouping capable of metal chelate formation adjacent to the primary amino group. The azomethine dyes are transferred into the corresponding azomethine dye/metal complexes. The complex formation is accompanied by shift of color hue and increase of light stability.

Inventors

  • 👤 Peter Bergthaller
  • 👤 Friedrich-Wilhelm Kunitz
  • 👤 Karl-Wilhelm Schranz
  • 👤 Erich Wolff

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 21:58
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 206 words
The process of producing color photographic images consisting of metal complexed azomethine dyes by the chromogenic development of an imagewise exposed color photographic recording material containing at least one silver halide emulsion layer, comprising the steps of (a) oxidizing a color developer compound containing a primary amino group and present in uniform distribution by development of silver halide which has been imagewise exposed; (b) coupling the oxidized color developer compound with a color coupler present in uniform distribution to produce a dye image consisting of an azomethine dye; and (c) reacting the azomethine dye with a metal salt to form an azomethine dye metal complex in which the color developer compound used corresponds to the general formula ##STR8## in which X 1 and X 2 each represents a nitrogen atom or a methine group; Z' represents a group capable of metal chelate formation; and R 1 and R 2 each represents alkyl or R 1 or R 2 together represent the radical required to complete a cyclic amino group; and the azomethine dye is reacted with a metal salt of a metal of the Ist to VIth Main Group or of the Ist, IInd or IVth to VIIIth Secondary Group of the Periodic System of Elements.
Claim 2
Dependent Claim 206 words
The process of producing color photographic images consisting of metal complexed azomethine dyes by the chromogenic development of an imagewise exposed color photographic recording material containing at least one silver halide emulsion layer, comprising the steps of (a) oxidizing a color developer compound containing a primary amino group and present in uniform distribution by development of silver halide which has been imagewise exposed; (b) coupling the oxidized color developer compound with a color coupler present in uniform distribution to produce a dye image consisting of an azomethine dye; and (c) reacting the azomethine dye with a metal salt to form an azomethine dye metal complex in which the color developer compound used corresponds to the general formula ##STR8## in which X 1 and X 2 each represents a nitrogen atom or a methine group; Z' represents a group capable of metal chelate formation; and R 1 and R 2 each represents alkyl or R 1 or R 2 together represent the radical required to complete a cyclic amino group; and the azomethine dye is reacted with a metal salt of a metal of the Ist to VIth Main Group or of the Ist, IInd or IVth to VIIIth Secondary Group of the Periodic System of Elements.
Claim 3
Dependent Claim 20 words
The process as claimed in claim 1, in which the color developer compound used corresponds to the following formula: ##STR9##
Claim 4
Dependent Claim 34 words
The process as claimed in claim 1, in which the color photographic recording material after the chromogenic development (steps (a) and (b)) is treated with an aqueous solution containing a salt of the metal.

References Cited (Backward Citations)

US3079255A Cited
US3342599A Cited
US3762922A Cited
US4271253A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-05-30 1986-11-29 1987-05-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-05-30 1990-11-29 1991-05-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-05-30 1994-11-29 1995-05-31 $7700.00 Window Closed / Lapsed

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