Photohardenable vesicular image-forming elements
US4019909A · kind A · utility
5Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1972 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Jun 21, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/119
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photohardenable thermoplastic stratum containing a thermally activated blowing agent may be used to record images by imagewise exposing the stratum to actinic radiation adapted to polymerize and harden the stratum image-wise, and heating the exposed stratum to soften the unhardened areas and decompose the blowing agent, whereby a positive image of microscopic bubbles is formed in said stratum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.