G - Physics – 03 – C
Patent
G - Physics
03
C
96/105
G03C 7/26 (2006.01) G03C 7/30 (2006.01) G03C 7/305 (2006.01) G03C 7/333 (2006.01)
Patent
CA 1248394
-0- PHOTOGRAPHIC ELEMENT AND PROCESS UTILIZING METAL COMPLEX COLOR MASKING DYES Abstract of the Disclosure A process of obtaining highly stable color masking dyes comprises use of an element which has a support having thereon at least one silver halide emulsion layer having associated therewith an essentially colorless, immobile, ligand-releasing compound of the structure LIG-X. In this structure, X is a group which, as a function of silver halide development, is cleaved from LIG, and LIG is a ligand capable of complexing with metal ions while joined to X to form a color masking dye. A color masking dye is formed by developing the imagewise exposed areas of the described element with a developing agent to cleave LIG from X and washing substantially all of the cleaved LIG moieties in those areas out of the element, and treating the element with metal ions to form a masking dye complex with LIG-X in unexposed areas.
480989
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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