Photoimaging systems with cyclic hydrazides
US4247618A · kind A · utility
12Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1979 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | May 11, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/732
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photosensitive system comprising in intimate admixture (1) a dye in its leuco form, (2) a photooxidant taken from the group of hexaarylbiimidazole compounds, benzophenone, para-aminophenyl ketones, polynuclear quinones and thioxanthenones, and mixtures thereof and in the presence of the admixture is a 5-member-heterocyclic phenylhydrazide compound. The cyclic phenylhydrazide can be present in the admixture, or a dry coating of the admixture, after imagewise exposure, is treated with a solution of the heterocyclic compound. The system is useful in formation of colored images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.