Photothermographic element with core-shell-type silver halide grains
US5382504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1994 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Feb 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/03535
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A negative-acting photothermographic element comprising a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising: PA1 (a) core-shell-type, photosensitive silver halide grains containing a total silver iodide content of less than 4 mole %, the core having a tint silver iodide content of from about 4-14 mole %, the shell having a second silver iodide content lower than the silver iodide content of the core; PA1 (b) a non-photosensitive, reducible source of silver; PA1 (c) a reducing agent for the non-photosensitive, reducible source of silver; PA1 (d) a binder; and PA1 (e) at least one compound selected from the group consisting of: a halogen molecule; an organic haloamide; and hydrobromide acid salts of nitrogen-containing heterocyclic compounds which are further associated with a pair of bromine atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.