Silver halide photographic material comprising hole-injection-type sensitizing dye(s) and supersensitizing compound(s)
US5851752A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1995 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Jul 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/59
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer comprising a substantially surface-latent-image-type silver halide emulsion which comprises hole-injection-type sensitizing dye(s) in an amount of 4.times.10.sup.-4 mol or more per mol of silver in the emulsion and further comprises supersensitizing compound(s), wherein the hole-injection-type sensitizing dye and the supersensitizing compound satisfy the requirements defined herein. The photographic material, thus comprising at least one silver halide emulsion that has been spectrally sensitized with a large amount of sensitizing dyes in a wavelength range longer than 545 nm and has been further sensitized by reduction sensitization, has a much increased sensitivity, while being fogged poorly, and has excellent storage stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.