Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1987-05-19
1989-04-04
Shah, Mukund J.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, 430570, 430576, 430581, 430591, G03C 102
Patent
active
048186740
ABSTRACT:
The present invention provides a novel silver chlorobromide emulsion which is substantially free from silver iodide and which contains silver halide crystal particles comprising cubic, rectangular parallelepiped or tetradecanedral first silver halide crystals having six (100) surfaces which may further comprise additional (110) surfaces, at least one of the six (100) surfaces being conjugated with second silver halide crystals having a halogen composition different from that of the (100) surfaces of the first silver halide crystals and mainly comprising (110) surfaces, the second silver halide crystals being conjugated over the one or more surfaces of the first silver halide crystals in the form of one or more projections.
The present invention further provides a method for the preparation of this conjugated silver chlorobromide particle-containing emulsion which is substantially free from silver iodide which comprises forming cubic, rectangular parallelepiped or tetradecahedral first silver halide crystals having six (100) surfaces which may further comprise additional (110) surfaces and then adding thereto an aqueous halide solution and an aqueous silver salt solution in the presence of a crystal habit regulator wherein at least one of the six (100) surfaces of the first silver halide crystals is conjugated with second silver halide crystals mainly comprising (110) crystal surfaces and having a halogen composition different from that of the (100) surfaces of the first silver halide crystals, the second silver halide crystals being conjugated over one or more surfaces of the first silver halide crystals in the form of one or more projections.
REFERENCES:
patent: 4094684 (1978-06-01), Maskasky
patent: 4463087 (1984-07-01), Maskasky
patent: 4471050 (1984-09-01), Maskasky
patent: 4495277 (1985-01-01), Becker et al.
patent: 4496652 (1985-01-01), Haugh et al.
patent: 4683192 (1987-07-01), Nishiyama
patent: 4735894 (1988-04-01), Ogawa
Berry and Skillman, "Surface Structures and Epitaxial Growths on ASB2 Microcrystals" Journal of Applied Physics, 35, 7, 2165 (1964).
Berry, Photographic Science and Engineering, 19, 3, 29 (1975).
Fuji Photo Film Co. , Ltd.
Shah Mukund J.
LandOfFree
Silver halide emulsions comprising grains with (100) surfaces ha does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silver halide emulsions comprising grains with (100) surfaces ha, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silver halide emulsions comprising grains with (100) surfaces ha will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-180107