Silver bromoiodide core-shell grain emulsion
US6815154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2003 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Jul 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2007/3034
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a light-sensitive emulsion, and a light-sensitive photographic material containing the same, comprising silver bromoiodide grains of a core shell structure comprising: a) an inner core consisting essentially of silver bromide or silver bromoiodide and having a silver iodide content within the range of 0 to 10 mole %, and b) a plurality of shells consisting essentially of silver bromide or silver bromoiodide, wherein said silver bromoiodide grains exhibit an average grain size lower than 0.60 micrometer, an average grain thickness lower than 0.15 micrometer, and an average aspect ratio lower than 5:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.