Process for the preparation of high chloride tabular grain emulsions (III)
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United States of America Patent
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Jan 12, 1993
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app pub date -
Sep 20, 1991
filing date -
Sep 20, 1991
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Abstract
A process of preparing a radiation sensitive high chloride high aspect ratio tabular grain emulsion is disclosed wherein silver ion is introduced into a gelatino-peptizer dispersing medium containing a stoichiometric excess of chloride ions with respect to the silver ions further characterized by a chloride ion concentration of less than 0.5 molar and a grain growth modifier of the formula: ##STR1## where Z.sup.8 is --C(R.sup.8).dbd. or --N.dbd.; R.sup.8 is H, NH.sub.2 or CH.sub.3 ; and R.sup.1 is hydrogen or a hydrocarbon of from 1 to 7 carbon atoms.
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