Color modifying imaging method and article
US3951658A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | May 24, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reprographic imaging method based upon a color modifying reaction. In one embodiment of this method a leuco (colorless or weakly colored) form of a material is allowed to selectively react with an appropriate reagent across a divider in response to selective photochemical modification of said divider whereby the leuco form of this material is converted to a highly colored derivative. In a second embodiment of this invention, the reverse occurs; namely a highly colored material is converted to a colorless or weakly colored derivative. A third contemplated embodiment of this invention involves the conversion of a one colored material to another accompanied by a substituted shift in its absorption spectrum. Each of these systems are highly suitable in preparation of transparencies such as microfilm recordings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.