Polaroid Corporation

Roberta R Luhowy

Howard G Rogers

Frank A Meneghini

Ronald F Cieciuch

This invention relates to color providing compounds useful as dye image-forming materials in color photographic processes. These compounds comprise a complete dye, i.e., a dye radical comprising the chromophoric system of a dye, such as, an azo, anthraquinone, azomethine or phthalocyanine dye and a cyclic moiety capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex containing the group ##STR1## wherein said C atom common to said S and N atoms is a tetrahedral carbon atom possessing 4 single covalent bonds. Preferred compounds comprise the radical of an organic dye substituted with [(L).sub.m-1 -Y] wherein L is a divalent organic linking group containing at least one carbon atom, m is a positive integer 1 or 2, and Y is a cyclic moiety selected from ##STR2## WHEREIN R.sup.1 is hydrogen or a monovalent organic radical; R.sup.2 is hydrogen or a monovalent hydrocarbon radical; and Z represents the carbon atoms necessary to complete a ring system having 4 to 20 atoms, said cyclic moiety (a) being attached to a carbon atom of said dye by a single covalent bond when m is 1 and attached to the carbon atom of said linking group L by a single covalent bond when m is 2 and ##STR3## WHEREIN R.sup.1 and Z have the same meaning given above, said cyclic moiety (b) being attached to a carbon atom of said dye by a spiro union when m is 1 and attached to the carbon atom of said linking group L by a spiro union when m is 2.

Dye substituted cyclic 1,3-sulfur-nitrogen compounds as dye

A silver ion scavenger layer is employed between adjacent silver halide strata to enhance color separation in multicolor photographic images prepared by processes which utilize the imagewise distribution of silver ions and/or soluble silver complex made available during development to liberate a corresponding imagewise distribution of dye or dye intermediate from a color-providing compound.

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Newton, MA, United States of America

Roberta R Luhowy