Silver halide photographic material and process for the development thereof
US5229263A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | May 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer containing silver halide grains, wherein said silver halide grains have a silver chloride content of 30 mol% or more and contain (i) and iridium compound in an amount of 10.sup.-6 mol or less per mol of silver halide, (ii) at least one compound selected from the group consisting of iron, rhenium, ruthenium and osmium compounds in an amount of 10.sup.-3 mol or less per mol of silver halide, and (iii) (a) at least one compound selected from the group consisting of compounds represented by general formula (1-a), (1-b) and (1-c): ##STR1## wherein Z represents a C.sub.1-18 alkyl group, a C.sub.6-18 aryl group or a heterocyclic group; Y represents an atomic group required for the formation of a C.sub.6-18 aromatic ring or a heterocyclic group, said groups represented by Z or formed by Y may be substituted with at least one substituent; M represents a metallic atom or organic cation; and n represents an integer from 2 to 10, and/or (b) the silver halide grains have been chemically sensitized at a pH of 5.5 or less. A process for the development of the silver …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.