Process for producing lithographic printing plate
US6207332A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for producing a lithographic printing plate which is inexpensive, is not elongated, can be readily handled and can provide a uniform image, is disclosed. The process comprises the steps of: PA1 using an original plate for lithographic printing comprising a support having a volume electric resistance of more than 1.times.10.sup.10 .OMEGA..multidot.cm, a conductive layer having a volume electric resistance of 1.times.10.sup.5 .OMEGA..multidot.cm or less, provided on one surface of the support, and a photoconductive layer containing zinc oxide and a binder, provided on the conductive layer, PA1 conducting negative corona discharge from the side of the photoconductive layer of the original plate for lithographic printing, and PA1 during this corona discharge, contacting a conductor having earth potential with at least the support of the original plate, thereby charging the photoconductive layer of the original plate for lithographic printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.