Photosensitive image-forming element containing silver halide crystals internally modified with a metal-halogen-fluorine-complex
AssigneeAgfa-Gevaert
InventorsDirk Vandenbroucke, Matthias Höhling, Ingo Reese
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Abstract
A photosensitive image-forming element is provided comprising on a support at least one photosensitive layer containing silver halide crystals which are internally doped with a transition metal complex forming centers which are able to interact with photocharges, wherein said transition metal complex is represented by the general formula (1): [ML6−nFn]m− (1) as disclosed in the claims and in the description. A method for the preparation of a silver halide containing image-forming element, wherein the silver halide comprises said transition metal complex, has also been described.
Claims8
A photosensitive image-forming element comprising on a support at least one photosensitive layer containing silver halide crystals that are internally doped with a transition metal complex represented by the general formula (1):
- [ML6−nFn]m− (1)
- wherein:
- M represents a metal selected from the group consisting of the metals belonging both to Group 7, 8, 9 and 10 and to the Periods 4, 5 and 6 of the Periodic System of Elements,
- each L represents a chlorine atom,
- n equals a value satisfying following equation:
- 1≦n≦6,
- m equals a value of 1, 2, 3 or 4.
A method for obtaining a photosensitive image-forming element comprising the steps of:
- precipitating silver halide emulsion crystals in the presence of one or more transition metal complex(es) represented by the general formula ( 1):
- [ML6−nFn]m− (1)
- wherein:
- M represents a metal selected from the group consisting of the metals belonging both to Group 7, 8, 9 and 10 and to the Periods 4, 5 and 6 of the Periodic System of Elements,
- each L represents a chlorine atom,
- n equals a value satisfying following equation:
- 1≦n≦6,
- m equals a value of 1, 2, 3 or 4,
- chemically ripening and/or fogging said crystals while spectrally sensitizing or desensitizing said emulsion, and
- coating said emulsion on at least one side of a support.
Dependencies are inferred from the claim text.