Gradation variable black- and -white paper

Details Gradation variable black- and -white paper Gradation variable black- and -white paper

1988-11-10

1991-01-22

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430571, 430588, G03C 119

Patent

active

049870637

ABSTRACT:
A gradation variable black-and-white paper containing only one light sensitive silver halide emulsion layer in which transfer of sensitization is prevented may be obtained by sensitization with at least one compound corresponding to the following formula ##STR1## in which at least one of the groups R.sub.1, R.sub.5 or R.sub.6 is halogen.

REFERENCES:
patent: 2384598 (1945-09-01), Carroll
patent: 4659654 (1987-04-01), Metoki et al.
patent: 4791053 (1988-12-01), Ogawa

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