Lippmann-emulsions and reversal processing thereof

Details Lippmann-emulsions and reversal processing thereof Lippmann-emulsions and reversal processing thereof

1976-12-03

1978-08-22

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

96107, 96 94R, 96 95, G03C 550, G03C 128

Patent

active

041086619

ABSTRACT:
A photographic material is described for making positive images by reversal processing, the material comprising a support and a silver halide Lippmann-emulsion layer the average silver halide grain-size of which is less than 100 nm wherein the grains have been chemically sensitized to fog so that a test portion of the emulsion when coated on a support at a coverage of silver halide corresponding to from about 3 g to about 7 g of silver nitrate per sq.m. gives a density between about 0.20 and about 0.70 upon development without exposure for 6 min at 20.degree. C in a developer of the composition:

REFERENCES:
patent: 3178282 (1965-04-01), Luckey et al.
patent: 3501305 (1970-03-01), Illingsworth
patent: 3501307 (1970-03-01), Illingsworth
patent: 3537858 (1970-11-01), Wise
patent: 3652280 (1972-03-01), De Belder et al.
patent: 3841877 (1974-10-01), Willems et al.
patent: 3892574 (1975-07-01), Claes
patent: 3942986 (1976-03-01), Florens
patent: 3963493 (1976-06-01), Vanassche

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