Variable contrast black and white photographic system

Details Variable contrast black and white photographic system Variable contrast black and white photographic system

1994-02-18

1995-08-29

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430508, 430507, 430509, 430510, 430517, 430571, 430606, G03C 1815

Patent

active

054459290

ABSTRACT:
There is described a photographic system comprising a variable contrast black and white photographic element and at least one filter. The element and the filter are so chosen that they cooperate to provide an extension of log exposure range of the element.

REFERENCES:
patent: 2202026 (1938-03-01), Renwick
patent: 2280300 (1942-04-01), Potter et al.
patent: 4232116 (1980-11-01), Jamieson

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