Process of preparing for photographic use high chloride tabular

Details Process of preparing for photographic use high chloride tabular Process of preparing for photographic use high chloride tabular

1992-01-27

1993-01-05

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, 430614, 430615, G03C 107, G03C 1035

Patent

active

051769913

ABSTRACT:
A process is disclosed of preparing a high chloride tabular grain emulsion for photographic use. An emulsion comprised of silver halide grains and a gelatino-peptizer dispersing medium in which morphologically unstable tabular grains having {111} major faces account for greater than 50 percent of total grain projected area and contain at least 50 mole percent chloride, based on silver, is formed in the presence of at least one 2-hydroaminoazine or xanthinoid morphological stabilizer adsorbed to surfaces of the tabular grains. Chemical sensitization of the emulsion and protonation of the morphological stabilizer are performed at least in part concurrently. Termination of protonation of the morphological stabilizer retains a portion of the morphological stabilizer on the surfaces of the chemically sensitized tabular grains.

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patent: 4952491 (1990-08-01), Nishikawa et al.
patent: 4983508 (1991-01-01), Ishiguro et al.
patent: 5035992 (1991-07-01), Houle et al.

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