Diazotype materials
US4131468A · kind A · utility
3Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1975 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Jan 17, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Modifying the surface of a diazotype material by incorporating an acrylic or methacrylic polymer into the diazotype sensitizing coating composition or coating the assembly with it so as to roughen the surface of the material thereby enabling nitrogen, which is liberated when the material is exposed to light, to escape from between the master and the diazotype material to prevent nitrogen accumulating between the two and hence avoiding slippage of one relative to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.