Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1992-06-03
1994-03-08
Baxter, Janet C.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430611, 430614, 430615, 430966, G03C 1035, G03C 106
Patent
active
052926311
ABSTRACT:
Monocyclic and polycyclic azoles having the following formula enhance the covering power of a developed silver image formed from a radiographic element comprising a radiation sensitive tabular grain silver bromide, silver bromochloride or silver bromoiodide emulsion layer containing grains having a mean equivalent circular diameter of at least 0.3 .mu.m and a grain population wherein at least 50 percent of the total grain population projected area is accounted for by tabular grains having a tabularity of greater than 8, as determined by the relationship: ##EQU1## wherein T is tabularity; ECD is the mean effective circular diameter in .mu.m of the tabular grains; and t is the mean thickness in .mu.m of the tabular grains. The azoles have the formula: ##STR1## wherein Z is --N.dbd. or --C(R.sup.5).dbd. where R.sup.5 is hydrogen, --NH.sup.2, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;
REFERENCES:
patent: 4425425 (1984-01-01), Abbott et al.
patent: 4720447 (1988-01-01), De Keyzer et al.
patent: 4727017 (1988-02-01), Pollet et al.
patent: 4728601 (1988-03-01), Rowland et al.
patent: 4859565 (1989-08-01), De Keyzer et al.
Burns Paul A.
Hershey Stephen A.
Vargas J. Ramon
Baxter Janet C.
Eastman Kodak Company
Thomas Carl O.
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