Claims
- 1. A silver halide photographic light-sensitive material comprising at least one light-sensitive silver halide emulsion layer on a support,
- wherein a silver halide emulsion contained in said at least one emulsion layer contains grains having an average grain diameter of not less than 0.3 .mu.m, an average grain thickness of less than 0.5 .mu.m, and an average grain diameter/average grain thickness ratio of not less than 2 in a percentage of at least 50% of a total projected area of emulsion grains, and a compound represented by the following formula (I) is added in an amount of 5.times.10.sup.-5 to 5.times.10.sup.-3 tool per tool of the silver halide during emulsion grain formation, the addition of said compound of formula (I) is performed after the addition of 85% of the total silver nitrate amount is finished, ##STR155## wherein X represents hydrogen or an alkaline metal, and R represents hydrogen, halogen or an alkyl group having 1 to 5 carbons.
- 2. The silver halide photographic light-sensitive material according to claim 1, wherein said emulsion is chemically sensitized further in the presence of a sensitizing dye in an amount of not less than 0.1 milli mol per mol of said silver halide emulsion.
- 3. The silver halide photographic light-sensitive material according to claim 2, wherein an addition amount of said sensitizing dye is not less than 0.1 milli mol and less than 4 milli mol per mol of the silver halide.
- 4. The silver halide photographic light-sensitive material according to claim 3, wherein an addition amount of said sensitizing dye is not less than 0.2 milli mol and less than 1.5 milli mol per mol of the silver halide.
- 5. The silver halide photographic light-sensitive material according to claim 2, wherein said sensitizing dye is selected from the group consisting of a cyanine dye, a merocyanine dye, a complex cyanine dye, a complex merocyanine dye, a holopolar cyanine dye, a styryl dye, a hemicyanine dye, an oxonol dye and a hemioxonol dye.
- 6. The silver halide photographic light-sensitive material according to claim 5, wherein said cyanine dye is a compound represented by the following formula (II): ##STR156## wherein Z.sub.1 and Z.sub.2 independently represent an atom group required to form a thiazole nucleus, a thiazoline nucleus, a benzthiazole nucleus, a naphthothiazole nucleus, an oxazole nucleus, a benzoxazole nucleus, an oxazoline nucleus, a naphthooxazole nucleus, an imidazole nucleus, a benzoimidazole nucleus, an imidazoline nucleus, a selenazole nucleus, a selenazoline nucleus, a benzoselenazole nucleus or a naphthoselenazole nucleus, R.sub.1 and R.sub.2 independently represent an alkyl group or a substituted alkyl group, at least one of R.sub.1 and R.sub.2 having a sulfo group or a carboxy group, each of L.sub.1 and L.sub.2 independently represents a substituted or nonsubstituted methine group, and n represents an integer from 0 to 2.
- 7. The silver halide photographic light-sensitive according to claim 1, wherein a ratio of an average grain diameter of grains of said emulsion to an average grain thickness thereof is 3 to 12.
- 8. The silver halide photographic light-sensitive material according to claim 7, wherein said average grain diameter/average grain thickness ratio is 5 to 10.
- 9. The silver halide photographic light-sensitive material according to claim 1, wherein an emulsion containing grains having said average grain diameter/average grain thickness of not less than 2 is an emulsion containing monodisperse hexagonal tabular silver halide grains.
- 10. The silver halide photographic light-sensitive material according to claim 9, wherein said emulsion comprises a dispersion medium and silver halide grains in which not less than 70% of a total projected area of said silver halide grains is occupied by hexagonal tabular silver halide grains having a ratio of a length of an edge having a maximum length to a length of an edge having a minimum length of not less than 2 and two parallel surfaces as outer surfaces, said hexagonal tabular silver grains being monodisperse with a variation coefficient of a grain size distribution of not more than 20% and having an aspect ratio of not less than 2.5 and a grain size of not less than 0.2 .mu.m.
- 11. The silver halide photographic light-sensitive material according to claim 9, wherein said hexagonal tabular grains comprises silver bromide, silver iodobromide, silver chlorobroimde or silver chloroiodobromide.
- 12. The silver halide photographic light-sensitive material according to claim 9, wherein the content of iodide ions in said hexagonal tabular grains is 0 to 30 mol %.
- 13. The silver halide photographic light-sensitive material according to claim 1, wherein said emulsion is chemically sensitized in the presence of a compound of formula (I) during grain formation.
- 14. The silver halide photographic light-sensitive material according to claim 1, wherein X represents an alkaline metal selected from the group consisting of lithium, sodium and potassium.
- 15. A method of chemically sensitizing a silver halide emulsion, which comprises adding a compound represented by formula (I) to a silver halide emulsion during grain formation, said emulsion contains grains having an average grain diameter of not less than 0.3 .mu.m, an average grain thickness of less than 0.5 .mu.m and an average grain diameter/average grain thickness ratio of not less than 2 in a percentage of at least 50% of a total projected area of emulsion grains, wherein said compound represented by formula (I) has the following formula: ##STR157## wherein X represents hydrogen or an alkaline metal, and R represents hydrogen, halogen or an alkyl group having 1 to 5 carbons, said compound represented by formula (I) is added in an amount of 5.times.10.sup.-5 to 5.times.10.sup.-3 mol per mol of the silver halide in said emulsion during emulsion grain formation, the addition of said compound of formula (I) is performed after the addition of 85% of the total silver nitrate amount is finished during grain formation.
- 16. A silver halide photographic light-sensitive material comprising at least one light-sensitive silver halide emulsion layer on a support,
- wherein a silver halide emulsion contained in said at least one emulsion layer contains grains having an average grain diameter of not less than 0.3 .mu.m, an average grain thickness of less than 0.5 .mu.m, and an average grain diameter/average grain thickness ratio of not less than 2 in a percentage of at least 50% of a total projected area of emulsion grains, and said emulsion is chemically sensitized in the presence of a compound represented by the following formula (I): ##STR158## wherein X represents hydrogen or an alkaline metal, and R represents hydrogen, halogen or an alkyl group having 1 to 5 carbons, said compound represented by formula (I) is added in an amount of 1.times.10.sup.-5 to 1.times.10.sup.-3 mol per mol of the silver halide in said emulsion after said emulsion is desalted.
Priority Claims (2)
Number |
Date |
Country |
Kind |
1-99226 |
Apr 1989 |
JPX |
|
1-156325 |
Jun 1989 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/860,237 filed on Mar. 27, 1992, now abandoned which is a continuation application of Ser. No. 07/508,357 filed on Apr. 9, 1990, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4433048 |
Solberg et al. |
Feb 1984 |
|
4806461 |
Ikeda et al. |
Feb 1989 |
|
4839263 |
Miyoshi et al. |
Jun 1984 |
|
Continuations (2)
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Number |
Date |
Country |
Parent |
860237 |
Mar 1992 |
|
Parent |
508357 |
Apr 1990 |
|