Process for stabilizing photographic material containing magenta coupler
US4661440A · kind A · utility
6Cited by
0References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1985 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Nov 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/132
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Photographic material containing magenta coupler is stabilized by incorporating a dibenzoxaphosphorin of the formula ##STR1## into the emulsion layer containing the coupler or into an adjoining colloid layer. The yellowing on dark storage of such material is substantially reduced as a result. The symbols A and n are defined in claim 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.