Process for making a two layer thermal negative plate
US6800426B2 · kind B2 · utility
3Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Apr 7, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for forming a negative image useful as a printing plate is disclosed. A photosensitive assembly that comprises (a) a hydrophilic support, (b) a first layer that comprises a polymer that is soluble or dispersible in an aqueous alkaline solution, (c) a second layer that comprises at least one o-quinonediazide compound, and (d) an infrared absorbing compound is: (1) flood exposed with ultraviolet radiation; (2) imagewise exposed with infrared laser radiation; and (3) developed to produce the negative image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.