Photographic material containing a mixture of silver halide emulsions
US5362620A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Oct 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention discloses a photographic material comprising on a support a photosensitive layer containing a mixture of silver halide emulsions at least one of which is spectrally sensitized and at least one of which is not spectrally sensitized characterized in that the surface of the silver halide particles of the silver halide emulsion not being spectrally sensitized is loaded with a stabilizer having a mercapto group or the tautomeric thione group thereof such that the surface covered by one molecule of stabilizer is between 10 .ANG..sup.2 and 70 .ANG..sup.2. The loss of speed due to migration of the spectral sensitizer from the sensitized emulsion to the non sensitized emulsion is reduced and can even be inhibited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.