Iodochloride emulsions containing quinones having high sensitivity and low fog
US5547827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Dec 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a radiation sensitive emulsion comprised of a dispersing medium and silver iodochloride grains Wherein the silver iodochloride grains are partially bounded by {100} crystal faces satisfying the relative orientation and spacing of cubic grains and contain from 0.05 to 1 mole percent iodide, based on total silver, with maximum iodide concentrations located nearer the surface of the grains than their center and wherein said emulsion further comprises a quinone comprising ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 may be independently substituted or non-substituted alkyl, aryl, alkylaryl, or halogen, carboxy, amido, cyano, methoxy; together R.sub.1 and R.sub.2, R.sub.3 and R.sub.4 may form carbocyclic, heterocyclic, aromatic, or heteroaromatic rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.