Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1996-08-19
1997-09-16
Wright, Lee C.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430601, 430610, 430613, 430614, G03C 110, G03C 134
Patent
active
056679564
ABSTRACT:
The grain/sensitivity ratio of a photographic silver halide material may be improved by adding a compound of the formula I to one of its layers. The material moreover exhibits a low increase in fog on storage. ##STR1## in which: Y.sub.1, Y.sub.2, Y.sub.3 each mean one of the following residues ##STR2## R.sub.1 to R.sub.34 mean H, alkyl or aryl; two residues (R.sub.1 to R.sub.34) located on the same N atom may complete a 5-, 6- or greater-membered ring containing at least one N atom and optionally further heteroatoms; two residues (R.sub.1 to R.sub.34) located on adjacent N atoms may complete a ring involving both N atoms and at least one P atom;
REFERENCES:
patent: 3271175 (1966-09-01), Burness et al.
patent: 4668616 (1987-05-01), Okamura et al.
patent: 4988615 (1991-01-01), Davies et al.
patent: 5573900 (1996-11-01), Kawanishi et al.
Bell Peter
Borst Hans-Ulrich
Buscher Ralf
Missfeldt Michael
Willsau Johannes
Agfa
Wright Lee C.
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