Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1993-08-25
1994-06-14
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, 430608, 430611, 430614, 430615, 430604, 430605, G03C 1005, G03C 1015, G03C 109, G03C 134
Patent
active
053209389
ABSTRACT:
Silver halide emulsions are disclosed in which at least 50 percent of total grain projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10, (2) each having an aspect ratio of at least 2, and (3) internally at their nucleation site containing iodide and at least 50 mole percent chloride. The emulsions are prepared by a process comprised of the steps of (a) introducing silver and halide salts into a dispersing medium so that nucleation of the tabular grains occurs in the presence of iodide with chloride accounting for at least 50 mole percent of the halide present in the dispersing medium and the pCl of the dispersing medium being maintained in the range of from 0.5 to 3.5 and (b) following nucleation completing grain growth under conditions that maintain the {100} major faces of the tabular grains.
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Antoniades Michael G.
Black Donald L.
Brust Thomas B.
Budz Jerzy A.
Chang Yun C.
Bowers Jr. Charles L.
Eastman Kodak Company
Huff Mark F.
Thomas Carl O.
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