Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1996-05-17
1998-04-07
Huff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, 430605, 430611, G03C 1005, G03C 1035, G03C 109
Patent
active
057363102
ABSTRACT:
Radiation sensitive emulsions are disclosed comprised of silver iodochloride grains having three pairs of equidistantly spaced parallel {100} crystal faces and containing from 0.05 to 3 mole percent iodide, based on total silver, in a controlled, non-uniform iodide distribution forming a core containing at least 50 percent of total silver, a surface shell, and a sub-surface shell that contains a maximum iodide concentration and provides, when the emulsion is exposed to 390 nm electromagnetic radiation at 10.degree. K., stimulated fluorescent emissions in the range of from 450 to 470 nm and at 500, the stimulated fluorescent emission in the range of from 450 to 470 nm having a peak intensity more than twice the stimulated fluorescent emission intensity at 500 nm.
The emulsion is prepared by a process wherein a) grains accounting for at least 50 percent of total silver forming the silver iodochloride grains are grown in the dispersing medium, (b) while employing the grains as substrates for further grain growth, locating crystal lattice variances in the grains by the incorporation of iodide to form a first shell having a higher local iodide concentration than any other grain portion, and (c) precipitating silver chloride onto the surface of the grains formed in step (b) to create a surface shell separating the first shell from the surface of the completed grains.
REFERENCES:
patent: 4269927 (1981-05-01), Atwell
patent: 4865962 (1989-09-01), Hasebe et al.
patent: 5252454 (1993-10-01), Suzumoto et al.
patent: 5252456 (1993-10-01), Ohshima et al.
patent: 5264337 (1993-11-01), Maskasky
patent: 5275930 (1994-01-01), Maskasky
patent: 5292632 (1994-03-01), Maskasky
patent: 5314798 (1994-05-01), Brust et al.
patent: 5320938 (1994-06-01), House et al.
patent: 5389508 (1995-02-01), Takada et al.
patent: 5413904 (1995-05-01), Chang et al.
patent: 5547827 (1996-08-01), Chen et al.
patent: 5550013 (1996-08-01), Chen et al.
patent: 5605789 (1997-02-01), Chen et al.
Research Disclosure, vol. 365, Sep. 1994, Item 36544.
Chen Benjamin Teh-Kung
Edwards James Lawrence
Ehrlich Sanford Howard
Lok Roger
Eastman Kodak Company
Huff Mark F.
Thomas Carl O.
LandOfFree
Cubical grain silver iodochloride emulsions and processes for th does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cubical grain silver iodochloride emulsions and processes for th, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cubical grain silver iodochloride emulsions and processes for th will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-11406