Process for the preparation of high chloride tabular grain emuls

Details Process for the preparation of high chloride tabular grain emuls Process for the preparation of high chloride tabular grain emuls

1990-12-07

1991-10-29

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, G03C 1035

Patent

active

050616170

ABSTRACT:
An improved process is disclosed of preparing a high chloride tabular grain emulsion. The concentration of thiocyanate ion in the dispersing medium at nucleation and during grain growth is relied upon a favor the formation of {111} crystal faces. The concentration of chloride ion in the thiocyanate ion containing dispersing medium is relied upon to produce the grain twinning necessary for tabular grain formation.

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Endo & Okaji J. Photographic Science, vol. 36, pp. 182-189, "An Empirical Rule to Modify the Crystal Habit of Silver Chloride to Form Tabular Grains in an Emulsion".

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