CO(III) Complex containing radiation sensitive element with diazo recording layer
US4195998A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1977 |
| Grant date | Apr 1, 1980 |
| Priority date | — |
| Expiry date | Oct 27, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A radiation-sensitive element is disclosed including a radiation-sensitive layer comprised of a cobalt(III)complex and a photoreductant. A process is disclosed in which the photoreductant is converted to a reducing agent by exposure to electromagnetic radiation longer than 300 nanometers. The reducing agent is then reacted with a cobalt(III)complex. Images can be recorded directly within the radiation-sensitive layer or in a separate image-recording element or layer by use of the residual cobalt(III)complex not exposed or one or more of the reaction products produced by exposure. By using the ammonia liberated from ammine ligand-containing cobalt(III)complexes on exposure in combination with imagewise and uniform exposures, positive or negative images can be formed in diazo image-recording layers or elements associated with the radiation-sensitive layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.