Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1995-05-15
1996-11-19
Huff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430604, 430605, G03C 1035, G03C 109
Patent
active
055761712
ABSTRACT:
A chemically and spectrally sensitized tabular grain emulsion is disclosed including tabular grains (a) having {111} major faces, (b) containing greater than 70 mole percent bromide and at least 0.25 mole percent iodide, based on silver, (c) accounting for greater than 90 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (f) exhibiting an average thickness in the range of from less than 0.3 .mu.m to at least 0.07 .mu.m.
It has been observed that photographic performance is enhanced when surface chemical sensitization sites include epitaxially deposited silver halide protrusions forming epitaxial junctions with the tabular grains, the protrusions (a) being located on up to 50 percent of the surface area of the tabular grains, (b) having a higher overall solubility than at least that portion of the tabular grains forming epitaxial junction with the protrusions, (c) forming a face centered cubic crystal lattice, and (d) containing a speed enhancing dopant selected to provide shallow electron trapping sites.
REFERENCES:
patent: 4435501 (1984-03-01), Maskasky
patent: 4439520 (1984-03-01), Kofron et al.
patent: 4471050 (1984-09-01), Maskasky
patent: 4814264 (1989-03-01), Kishida et al.
patent: 5462849 (1995-10-01), Kuromoto et al.
patent: 5494789 (1996-02-01), Daubendiek et al.
patent: 5503970 (1996-04-01), Olm et al.
patent: 5503971 (1996-04-01), Daubendiek et al.
patent: 5518872 (1996-05-01), King et al.
Research Disclosure vol. 367, Nov. 1994, Item 36736.
Black Donald L.
Daubendiek Richard L.
Deaton Joseph C.
Gersey Timothy R.
Lighthouse Joseph G.
Eastman Kodak Company
Huff Mark F.
Thomas Carl O.
LandOfFree
Tabular grain emulsions with sensitization enhancements does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tabular grain emulsions with sensitization enhancements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tabular grain emulsions with sensitization enhancements will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-540087