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US 5,399,469 AGranted
Spatially fixed absorber dyes in less sensitive layers
AssigneeEastman Kodak Company
InventorRichard P. Szajewski
Life of this patent
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Abstract
This invention relates to color photographic elements and processes and especially to color photographic elements comprising two or more image forming layers sensitized to the same region of the electromagnetic spectrum where a more sensitive layer is positioned closer to an exposure source than a less sensitive layer and the less sensitive layer additionally comprises a spatially fixed absorber dye. The combination provides improved image sharpness without compromising photographic sensitivity.
Claims20
A photographic element comprising a support bearing at least two light sensitive silver halide emulsion layers wherein:
- said layers are sensitive to the same region of the electromagnetic spectrum;
- and
- a more light sensitive layer of said at least two light sensitive silver halide emulsion layers is closer to an exposure source than a less light sensitive layer of said at least two light sensitive silver halide layers, said more light sensitive layer and said less light sensitive layer are sensitive to the same region of the electromagnetic spectrum, and;
- said less light sensitive layer comprises a spatially fixed absorber dye that absorbs light in substantially the same region of the electromagnetic spectrum as said light sensitive silver halide;
- wherein
- said spatially fixed absorber dye does not substantially contribute to the spectral sensitivity of said less sensitive silver halide emulsion layer, and the thickness of said element above the support is between 5 and 30 microns.
3 more elements
Dependencies are inferred from the claim text.