Photographic image-forming method
US4332878A · kind A · utility
22Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1981 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Apr 30, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic image-forming method comprising imagewise exposing a silver halide photographic light-sensitive element containing a specific hydroquinone derivative in the silver halide emulsion layer of substantially the surface latent image type or at least one hydrophilic colloid layer thereof and then developing the exposed light-sensitive element in the presence of a specific hydrazine compound. The method forms a photographic image having markedly high negative gradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.