Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1993-11-02
1994-12-13
Neville, Thomas R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430502, 430568, 430606, 430264, 430 22, G03C 108
Patent
active
053729218
ABSTRACT:
A high-contrast room-light-handleable black-and-white silver halide photographic element that is especially useful in the field of graphic arts is comprised of a support, an imaging layer containing doped silver halide grains with a mean grain size of less than 0.12 micrometers, a print-out layer containing doped silver halide grains with a mean grain size in the range of from 0.14 to 0.4 micrometers, and a third set of doped silver halide grains with a mean grain size of less than 0.12 micrometers distributed within the print-out layer or within a separate safelight protection layer. Dopant levels are controlled so that the photographic speed of the imaging layer is higher than the photographic speed of the print-out layer and so that the photographic speed of the third set of silver halide grains is less than that of the imaging layer. The element utilizes very slow speed emulsions which render it capable of being handled in room light and is able to print-out a visible image on normal exposure and develop to full density upon being processed in conventional developing solutions.
REFERENCES:
patent: 4268620 (1981-05-01), Iytaka et al.
patent: 4547458 (1985-10-01), Iijima et al.
patent: 4639410 (1987-01-01), Mochizuki et al.
patent: 4659647 (1987-04-01), Vacca et al.
patent: 4746593 (1988-05-01), Kitchin et al.
patent: 4818659 (1989-04-01), Takahashi et al.
patent: 4912017 (1990-03-01), Takagi et al.
patent: 4939067 (1990-07-01), Takagi et al.
patent: 4975354 (1990-12-01), Machonkin et al.
patent: 5061595 (1991-10-01), Gingello et al.
patent: 5122434 (1992-06-01), Van Bockstaele et al.
patent: 5185232 (1993-02-01), Sasaoka
patent: 5279933 (1994-01-01), Gingello et al.
Gingello Anthony D.
Schmidt Ronald J.
Eastman Kodak Company
Lorenzo Alfred P.
Neville Thomas R.
LandOfFree
High-contrast photographic elements with enhanced safelight perf does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-contrast photographic elements with enhanced safelight perf, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-contrast photographic elements with enhanced safelight perf will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1192748