Claims
- 1. A radiation-sensitive emulsion comprised of a dispersing medium and silver halide grains in which greater than 50 percent of total grain projected area is accounted for by tabular silver halide grains exhibiting an average aspect ratio of greater than 5, WHEREIN
- the tabular grains have an average equivalent circular diameter of at least 0.7 .mu.m and an average thickness of less than 0.07 .mu.m and
- the tabular silver halide grains contain from 0.4 to 20 mole percent chloride and 0 to 10 mole percent iodide, based on silver, the balance of the halide being bromide.
- 2. A radiation-sensitive emulsion according to claim 1 wherein the tabular grains contain at least 1 mole percent chloride, based on silver.
- 3. A radiation-sensitive emulsion according to claim 2 wherein the tabular grains contain up to 15 mole percent chloride, based on silver.
- 4. A radiation-sensitive emulsion according to claim 3 wherein the tabular grains additionally contain from 0.05 to 10 mole percent iodide, based on silver.
- 5. A radiation-sensitive emulsion according to claim 4 wherein the tabular grains contain from 0.5 to 5 mole percent iodide.
- 6. A radiation-sensitive emulsion according to claim 1 wherein the tabular grains account for greater than 70 percent of total grain projected area.
- 7. A radiation-sensitive emulsion according to claim 6 wherein the tabular grains account for greater than 97 percent of total grain projected area.
- 8. A radiation-sensitive emulsion according to claim 1 wherein the tabular grains exhibit an average equivalent circular diameter of at least 1.0 .mu.m and an average aspect ratio of greater than 14.
- 9. A radiation-sensitive emulsion according to claim 1 wherein a green or red spectral sensitizing dye is adsorbed to the tabular grains.
- 10. A radiation-sensitive emulsion comprised of a dispersing medium and silver halide grains in which greater than 70 percent of total grain projected area is accounted for by tabular silver halide grains exhibiting an average aspect ratio of greater than 8, WHEREIN
- the tabular grains have an average equivalent circular diameter of at least 0.7 .mu.m and an average thickness of from less than 0.07 .mu.m to 0.04 .mu.m and
- the tabular silver halide grains contain from 1 to 15 mole percent chloride and from 0.5 to 5 mole percent iodide, based on silver, the balance of the halide forming the grains being bromide.
- 11. A radiation-sensitive emulsion according to claim 10 wherein the tabular grains account for greater than 97 percent of total grain projected area and exhibit an average equivalent circular diameter of at least 1.0 .mu.m.
Parent Case Info
This is a continuation-in-part of U.S. Ser. No. 139,971, filed Oct. 21, 1993, now U.S. Pat. No. 5,372,427, and U.S. Ser. No. 238,119, filed May 4, 1994, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
362699A3 |
Apr 1990 |
EPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
139971 |
Oct 1993 |
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