Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1987-06-26
1989-06-13
Shah, Mukund J.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430581, 430597, 430940, G03C 100, G03C 102
Patent
active
048392715
ABSTRACT:
A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e.g., cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful in sensitizing the silver halide emulsion useful for fogged direct-positive films.
REFERENCES:
patent: 3501312 (1970-03-01), Mee et al.
patent: 3505070 (1970-04-01), Litzerman et al.
patent: 3580911 (1971-05-01), Mee et al.
patent: 3592653 (1971-07-01), Fumia et al.
patent: 3598596 (1971-08-01), Chapman
E. I. Du Pont de Nemours and Company
Shah Mukund J.
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