Silver halide emulsion and a photographic material

Details Silver halide emulsion and a photographic material Silver halide emulsion and a photographic material

1990-09-07

1992-06-09

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, G03C 1035

Patent

active

051206382

ABSTRACT:
A photographic silver halide emulsion, of which at least 50% by weight of the silver halide crystals are triply twinned crystals with a crystal structure consisting of a basic tetrehedron with [111]-faces and three identical twinned regions, each of which has a [111]-twin face in common with the basic tetrahedron and is outwardly bounded by three [100]-faces and one [111]-face or by four [100]-faces, and of which any two respective regions are connected to each other by a common [411]-twin face, and whose grain size distribution has a coefficient of variation of at most 20%, is suitable for the production of photographic materials having high sensitivity, high contrast and very high developability.

REFERENCES:
Klein, E., Metz. H. J.; Moisar, E. Zwillinsbildung bei AgBr-und AgCl-Kristallen in photographischen Emulsionen, Teil I, Photographic Korrespondenz, vol. 99, pp. 99-102, No. 7 (1963).
Klein, E.; Metz, H. J.; Moisar, E. Zwillingsbildung bei AgBr-und AgCl-Kristallen in Photographischen Emulsionen, Teil II, Photographic Korrespondenz, vol. 100, Pp. 55-69, No. 4 (1964).

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