Claims
- 1. A photographic element comprising a support and at least two green-sensitive silver halide emulsion layers of different sensitivity which are not separated by an imaging silver halide emulsion layer sensitive to red or blue light,
- each green-sensitive emulsion layer comprising a two-equivalent pyrazoloazole magenta dye-forming coupler having a structure according to formula I ##STR10## wherein R.sup.1 is a substituent in the 6-position which does not adversely affect the desired properties of the coupler,
- Q.sup.2 is a coupling-off group,
- X, Y, Z are individually carbon or nitrogen atoms necessary to complete an azole ring, with unsaturated bonding being present in the ring as needed,
- R.sup.2 denotes the group ##STR11## R.sup.3, R.sup.4 are individually hydrogen or unsubstituted or substituted alkyl or aryl, at most one of R.sup.3 and R.sup.4 being hydrogen,
- n is 1 or 2,
- R.sup.5, R.sup.6 are individually hydrogen, unsubstituted or substituted alkyl or aryl, --C(O)--R.sup.7 or --SO.sub.2 R.sup.7, at most one of R.sup.5 and R.sup.6 being hydrogen,
- R.sup.7 is unsubstituted or substituted alkyl or aryl or --NH--R.sup.8, and
- R.sup.8 is unsubstituted or substituted alkyl or aryl,
- wherein the activity of said dye-forming coupler present in the layer of lower sensitivity is less than the activity of said dye-forming coupler present in the layer of higher sensitivity,
- and wherein the layer of lower sensitivity has the lowest sensitivity of any green-sensitive layer containing a magenta dye-forming coupler present in the element.
- 2. A photographic element as claimed in claim 1, wherein the activity of said dye-forming coupler present in said layer of lower sensitivity is less than about 85% of the activity of said dye-forming coupler present in said layer of higher sensitivity.
- 3. A photographic element as claimed in claim 1, wherein R.sup.1 is an unsubstituted or substituted alkyl, aryl, alkoxy or carbonamido group.
- 4. A photographic element as claimed in claim 1, wherein R.sup.l is an unsubstituted or substituted alkyl or aryl group.
- 5. A photographic element as claimed in claim 1, wherein X, Y and Z are individually carbon or nitrogen atoms necessary to complete a triazole ring.
- 6. A photographic element as claimed in claim 5, wherein said pyrazoloazole couplers are pyrazolotriazoles having a structure according to formula II ##STR12## or formula III ##STR13## wherein R.sup.9 is a substituent which does not adversely affect the desired properties of the pyrazolotriazole coupler,
- R.sup.10 is unsubstituted or substituted alkyl or aryl,
- R.sup.11 is unsubstituted or substituted alkyl, aryl, or --NH--R.sup.12,
- R.sup.12 is unsubstituted or substituted alkyl or aryl,
- Q.sup.1 is a coupling-off group,
- X is a carbon or sulfur, and
- m is 1 or 2.
- 7. A photographic element as claimed in claim 6, wherein R.sup.9 is an unsubstituted or substituted alkyl or aryl group.
- 8. A photographic element as claimed in claim 1, wherein said magenta dye-forming couplers are selected from the group consisting of: ##STR14##
- 9. A photographic element according to claim 1, wherein the coupler of higher activity has the structure: ##STR15## and the coupler of lower activity has the structure: ##STR16##
- 10. A photographic element as claimed in claim 1, wherein R.sup.1 is a tertiary carbon group having the structure ##STR17## wherein R.sup.13, R.sup.14 and R.sup.15 are individually substituents that do not adversely affect said coupler.
- 11. A photographic element as claimed in claim 10, wherein R.sup.13, R.sup.14 and R.sup.15 are individually halogen atoms or unsubstituted or substituted alkyl, aryl, carbonamido, ureido, carboxy, cyano, sulfamyl, sulfonamido, carboxamido, cycloalkyl, alkoxy, alkylthio, aryloxy, arylthio, amino, acylamino or heterocyclyl groups.
- 12. A photographic element as claimed in claim 10, wherein R.sup.13 form with one of R.sup.14 and R.sup.15 a heterocyclic ring.
- 13. A photographic element as claimed in claim 10, wherein R.sup.13 forms with at least one of R.sup.14 and R.sup.15 a carbocyclic ring.
- 14. A photographic element according to claim 1 comprising a third silver halide emulsion layer sensitized to green light having a sensitivity intermediate between that of the layer of higher sensitivity and that of lower sensitivity, wherein said third layer comprises the same magenta dye-forming coupler as the layer of lower sensitivity.
- 15. A multicolor photographic element comprising a support bearing (a) a cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler,
- (b) a magenta dye image-forming unit comprising at least first and second green-sensitive silver halide emulsions of different sensitivities, each having associated therewith at least one two-equivalent magenta dye-forming coupler, wherein the first and second green-sensitive emulsions are not separated by an imaging silver halide emulsion layer sensitive to red or blue light, and
- (c) a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein each of said magenta couplers has a structure according to formula I ##STR18## wherein R.sup.1 is a substituent in the 6-position which does not adversely affect the desired properties of the coupler,
- Q.sup.2 is a coupling-off group,
- X, Y, Z are individually carbon or nitrogen atoms necessary to complete an azole ring, with unsaturated bonding being present in the ring as needed,
- R.sup.2 denotes the group ##STR19## R.sup.3, R.sup.4 are individually hydrogen or unsubstituted or substituted alkyl or aryl at most one of R.sup.3 and R.sup.4 being hydrogen,
- n is 1 or 2,
- R.sup.5, R.sup.6 are individually hydrogen, unsubstituted or substituted alkyl or aryl, --C(O)--R.sup.7 or --SO.sub.2 R.sup.7, at most one of R.sup.5 and R.sup.6 being hydrogen,
- R.sup.7 is unsubstituted or substituted alkyl or aryl or --NH--R.sup.8, and
- R.sup.8 is unsubstituted or substituted alkyl or aryl,
- wherein the activity of said magenta dye-forming coupler present in the layer of lower sensitivity is less than the activity of said magenta dye-forming coupler present in the layer of higher sensitivity,
- and wherein the layer of lower sensitivity has the lowest sensitivity of any green-sensitive layer containing a magenta dye-forming coupler present in the element.
- 16. A process for developing an image in a photographic element as claimed in claim 1, comprising the step of developing said element with a silver halide color developing agent.
- 17. A photographic element according to claim 1, wherein said layer of lower sensitivity is adjacent to said layer of higher sensitivity.
- 18. A photographic element according to claim 1, wherein the activity of said magenta dye-forming coupler present in the layer of lower sensitivity, is lower than or equal to the activity of any of the magenta dye-forming couplers present in any green-sensitive layers of the element.
- 19. A photographic element according to claim 15, comprising a third silver halide emulsion layer sensitized to green light having a sensitivity intermediate between that of the layer of higher sensitivity and that of lower sensitivity, wherein said third layer comprises the same magenta dye-forming coupler as the layer of lower sensitivity.
- 20. A photographic element according to claim 1, wherein Q.sup.2 is not photographically active.
Parent Case Info
This application is a continuation of application Ser. No. 08/082,073, filed Jun. 24, 1993, abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0217353 |
Apr 1987 |
EPX |
0384487 |
Aug 1989 |
EPX |
62-206544 |
Sep 1987 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Toshibumi et al. Abstract JP 61-72238, "Silver Halide Color Photosensitive Material", (1986). |
Abstract JP 2-89053, Fuji Photo Film KK. (1988). |
Continuations (1)
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Number |
Date |
Country |
Parent |
82073 |
Jun 1993 |
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