Reversal photographic elements comprising an additional layer containing an imaging emulsion and a non-imaging emulsion
US6162595A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/35
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic elements capable of forming a reversal image are disclosed comprising a support and, coated on said support, at least one image recording emulsion layer comprised of a dispensing medium and radiation sensitive silver halide grains and at least one substantially non-image forming layer. In one embodiment, the substantially non-image forming layer comprises: a) a light sensitive silver halide imaging emulsion which is less than 10 percent of the mass of the total imaging emulsion in the element; b) a first non-image forming silver salt emulsion having an average grain size less than 0.15 .mu.m; and c) a second non-image forming silver salt emulsion comprising iodide having an average grain size greater than that of the first non-image forming emulsion. In a second embodiment, the substantially non-image forming layer comprises: a) a light sensitive silver halide imaging emulsion which is less than 10 percent of the mass of the total imaging emulsion in the element; and b) a polydisperse non-image forming silver salt emulsion comprising iodide and having an average grain size less than 0.15 .mu.m and a coefficient of variation of at least 50%. In the substantially non-ima…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.