Claims
- 1. In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated in said layer (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color developing agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent;
- the improvement wherein said naphtholic coupler has the structure: ##STR18## wherein R and R.sup.1 are independently selected and are alkyl groups containing 1 to 8 carbon atoms and n is an integer from 1 to 6; and said colored coupler compound has the structure ##STR19##wherein R.sup.2 is an alkyl group containing 1 to 6 carbon atoms, R.sup.3 and R.sup.4 are independently selected and are alkyl groups containing 2 to 6 carbon atoms, B is hydrogen or COOR.sup.6 wherein R.sup.6 is alkyl containing 1 to 8 carbon atoms and A is a sulfonated naphthylazo group selected from those having the structure: ##STR20##wherein R.sup.5 is an alkyl group containing 1 to 4 carbon atoms, M is a photographically inactive monovalent cation.
- 2. An improved photographic element as in claim 1 wherein said naphtholic coupler is 1-hydroxy-2-[.alpha.(2,4-di-t-pentylphenoxy)-n-butyl]-naphthamide, R.sup.2 is ethyl, R.sup.3 and R.sup.4 are pentyl, R.sup.5 is methyl, R.sup.6 is butyl, and A has the structure V.
- 3. An improved photographic element as in claim 2 wherein M is pyridine and A is a para or ortho substituent on the phenoxy group.
- 4. An improved photographic element as in claim 1, wherein said colored coupler compound has the structure: ##STR21##
- 5. In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated therein, (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color development agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent;
- the improvement wherein said naphtholic coupler has the structure: ##STR22##and said colored coupler compound has the structure: ##STR23##wherein M.sub.1 is tertiary amine.
- 6. An improved photographic element as in claim 5 wherein said M.sub.1 is pyridine.
- 7. In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent; said dye having unwanted absorption in the green and blue regions of the spectrum; and at least one green- and blue-absorbing color coupler compound capable of forming a cyan dye and simultaneously losing a part of its capability to absorb green and blue light upon reaction with said color-developing agent;
- the improvement wherein said green- and blue-absorbing color coupler is ##STR24##
- 8. In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent; said dye having unwanted absorption in the green and blue regions of the spectrum; and at least one green- and blue-absorbing color coupler compound capable of forming a cyan dye and simultaneously losing a large part of its capability to absorb green and blue light upon reaction with said color-developing agent; the improvement wherein said green- and blue-absorbing color coupler is
Parent Case Info
This application is a continuation-in-part of copending U.S. Application Ser. No. 447,809, filed Mar. 4, 1974, now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
447809 |
Mar 1974 |
|