Method for preparation of printing plate by electrophotographic process using liquid developer
US5882828A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Mar 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for preparation of a printing plate by an electrophotographic process comprising, in order, a) forming a toner image on an electrophotographic light-sensitive element having a release surface by an electrophotographic process using a liquid developer comprising a dispersion medium having dispersed therein toner grains each containing at least one resin (A) having a glass transition point of from 20.degree. C. to 80.degree. C. or a softening point of from 35.degree. C. to 100.degree. C. and at least one resin (B) having a glass transition point or a softening point at least 2.degree. C. lower than that of the resin (A), b) drying the toner image to remove the dispersion medium thereby causing at least partial adhesion between the toner grains, c) bringing the toner image into contact with an intermediate transfer medium having a surface adhesion force of not less than 3 gram.multidot.force at temperature (T.sub.1) and not more than 40 gram.multidot.force at temperature (T.sub.2), at the temperature (T.sub.1) to transfer the toner image onto the intermediate transfer medium, and d) bringing the toner image into contact with a final receiving material having a surface capable…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.