Silver halide photographic material containing selenium or tellu

Details Silver halide photographic material containing selenium or tellu Silver halide photographic material containing selenium or tellu

1993-12-03

1995-02-28

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430600, 430601, 430610, 430611, 430613, 430614, G03C 109

Patent

active

053936558

ABSTRACT:
A silver halide photographic material comprises a silver halide emulsion layer provided on a support. The silver halide emulsion layer contains a heterocyclic selenium or tellurium compound represented by the formula (Ia), (Ib), (Ic) or (Id): ##STR1## in which each of Ch.sup.1, Ch.sup.3, Ch.sup.6 and Ch.sup.12 is Se or Te; and each of Ch.sup.2, Ch.sup.4, Ch.sup.5, Ch.sup.7, Ch.sup.8, Ch.sup.9, Ch.sup.10, Ch.sup.11, Ch.sup.13, Ch.sup.14 and Ch.sup.15 is O, S, Se or Te. Other selenium or tellurium compounds are also disclosed.

REFERENCES:
patent: 3297447 (1967-01-01), McVeigh
patent: 4111697 (1975-09-01), Pollet et al.
patent: 4782013 (1988-11-01), Herz et al.

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