Thermally developable materials containing organic silver salts with rod-like morphology and method of making and using
US6977139B2 · kind B2 · utility
2Cited by
6References
39Claims
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Key dates
| Filing date | Apr 16, 2004 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Apr 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Thermally developable materials such as thermographic and photothermographic materials include a novel non-photosensitive source of reducible silver ions that are predominantly provided as rod-shaped particles of silver salt of a nitrogen-containing heterocyclic compound containing an imino group. The rod-shaped particles have an average aspect ratio of at least 3:1 and a width index for particle diameter of 1.25 or less, and provide improved imaging properties. These particles can be prepared using double jet precipitation procedures in which vAg is kept constant at a value of equal to or greater than −50 mV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.