Light-sensitive silver halide photographic emulsion, silver halide photographic light sensitive material and method for processing silver halide photographic light-sensitive material
US5591570A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1995 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Oct 20, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/03535
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light-sensitive silver halide photographic emulsion is disclosed, wherein at least 70% of the total projected area of silver halide grains are tabular grains having an average aspect ratio of a diameter to a thickness of 2 or more, an average value of the longest distances between two or more parallel twin planes contained in the respective tabular grains is 0.008 .mu.m or more, and a variation coefficient of the longest distances between parallel twin planes is 35% or less, and wherein the silver halide emulsion is spectrally sensitized with a substantially slightly water-soluble sensitizing dye by adding the dye to the emulsion in the form of a dispersion of solid particles dispersed in an aqueous solution substantially free from an organic solvent or surfactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.