Process for increasing the effective speed of photographic films and improved film structures
US4345023A · kind A · utility
4Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1981 |
| Grant date | Aug 17, 1982 |
| Priority date | — |
| Expiry date | Jan 16, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process is disclosed for enhancing the speed of both certain black and white and color films, through initial black-and-white development, and redevelopment with color coupling developers and color coupling dye units, and replacement of silver units with multiple color dye units for each silver unit that provide a color image enhanced over that provided by the silver image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.