Photographic material for the silver dye bleach process
US4576885A · kind A · utility
0Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Jan 16, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic silver dye bleach material which contains a compound of the formula ##STR1## in which R is a substituted alkyl, R.sub.1 is substituted or unsubstituted alkyl, p is 1 or 2, q is 0 or 1, p+q having to be 1 or 2, and n is 1 to 20, or a salt of this compound. The benzoquinones used deactivate bleach catalysts which diffuse beyond the silver image area produced by development of the exposed material. The silver dye bleach material containing these compounds is therefore distinguished by high contrast, high sharpness and good color reproduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.