Organotellurium (II) and (IV) compounds in heat-developable photographic materials and process
US4144062A · kind A · utility
9Cited by
13References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1977 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Nov 3, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A heat developable, photographic material comprising (a) a photographic metal compound with (b) an oxidation-reduction image-forming combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent and (ii) a reducing agent provides an improved amplified image. The photographic metal compound can be, for example, photograhic silver halide. A developed image can be provided in the material after imagewise exposure by heating the element to moderately elevated temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.