Silver halide photographic emulsion and silver halide color photographic light-sensitive material incorporating it
US5273871A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Oct 1, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3022
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide emulsion comprising a dispersing medium and light-sensitive silver halide grains wherein said silver halide grains each comprise: PA1 (a) a high silver iodide-containing phase having a silver iodide content of not less than 15 mol % in the internal portion, PA1 (b) a low silver iodide-containing phase locating outside the phase (a) and having a silver iodide content lower than that of the phase (a), and PA1 (c) a surface phase having a silver iodide content higher than that of an inner phase adjacent thereto, and wherein a part or all of the phase (c) and a part or all of the phase (a) or the phase (b) are formed by supplying a fine silver halide grain emulsion prepared in the presence of protective colloid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.