Global Patent Index - EP 0986486 A1

EP 0986486 A1 2000-03-22 - METHOD OF MAKING LITHOGRAPHIC PRINTING PLATES

Title (en)

METHOD OF MAKING LITHOGRAPHIC PRINTING PLATES

Title (de)

VERFAHREN ZUR HERSTELLUNG VON FLACHDRUCKPLATTEN

Title (fr)

PROCEDE DE FABRICATION DE PLANCHES D'IMPRESSION LITHOGRAPHIQUES

Publication

EP 0986486 A1 (EN)

Application

EP 98937461 A

Priority

  • EP 9803483 W
  • GB 9711381 A

Abstract (en)

[origin: GB2325891A] A method for preparing a lithographic printing plate which involves providing a plate precursor comprising a grained and anodised aluminium substrate coated with a metallic layer, preferably a silver layer, deposited by means of an electroless deposition process, and imagewise exposing the precursor by means of a high intensity laser beam, to remove of the metallic layer in the exposed areas. The method provides press ready plates showing high image quality, good press properties and high durability on press, whilst eliminating the requirement for the use of intermediate film and developer chemistry. The silver layer may be deposited by applying colloidal silver to the substrate and then either (i) dipping the treated substrate into a stabilised solution containing a silver salt and a reducing agent or (ii) using the silver salt diffusion transfer process.

IPC 1-7 (main, further and additional classification)

B41N 1/08; B41C 1/10; B41N 1/10; B41N 3/03

IPC 8 full level (invention and additional information)

G03F 7/07 (2006.01); B41C 1/10 (2006.01); B41N 1/08 (2006.01); G03F 7/00 (2006.01)

CPC (invention and additional information)

B41N 1/086 (2013.01); B41C 1/1033 (2013.01)

Citation (search report)

See references of WO 9855332A1

Designated contracting state (EPC)

DE FR GB IT NL

EPO simple patent family

GB 2325891 A 19981209; GB 9811834 D0 19980729; EP 0986486 A1 20000322; GB 9711381 D0 19970730; JP 2002502509 A 20020122; WO 9855332 A1 19981210

INPADOC legal status


2001-11-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010502

2001-01-31 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20001219

2000-03-22 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000105

2000-03-22 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT NL