Photographic material

Details Photographic material Photographic material

1982-06-22

1984-03-13

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430601, 430627, 430629, G03C 108, G03C 110

Patent

active

044368119

ABSTRACT:
Compounds of the formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another are hydrogen, alkyl or alkoxy and R.sub.2 additionally represents a radical of the formula ##STR2## in which R.sub.1 and R.sub.3 have the abovementioned meanings, R.sub.4 is unsubstituted or substituted phenoxy or unsubstituted or substituted amino and R.sub.5 is hydrogen or a radical of the formula ##STR3## in which R.sub.1, R.sub.3 and R.sub.4 have the abovementioned meanings and R.sub.2 ' has the same meanings as R.sub.1 and R.sub.3 are suitable development accelerators in the development of exposed, photographic materials containing silver halide.
They accelerate the reduction of the exposed silver salt to silver and increase the speed of photographic material.

REFERENCES:
patent: 3057721 (1962-10-01), Cowden et al.
patent: 3338712 (1967-08-01), Thurston
patent: 3598590 (1971-08-01), Huckstadt et al.
Research Disclosure, Dec. 1977, No. 164, #16445, pp. 23-25.

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