Global Patent Index - EP 1057623 A1

EP 1057623 A1 2000-12-06 - A method for preparing a lithographic printing plate by laser ablation of a heat-sensitive imaging element

Title (en)

A method for preparing a lithographic printing plate by laser ablation of a heat-sensitive imaging element

Title (de)

Verfahren zur Herstellung einer Flachdruckplatte durch Laserablation eines wärmempfindlichen Elements

Title (fr)

Procédé pour la préparation d'une plaque d'impression lithographique par gravure ablative au laser d'un élément sensible à la chaleur

Publication

EP 1057623 A1 (EN)

Application

EP 99201791 A

Priority

EP 99201791 A

Abstract (en)

According to the present invention there is provided a method for preparing a lithographic printing plate, said method comprising the steps of (1) providing an imaging element comprising on a lithographic hydrophilic support as contiguous top layer a heat-sensitive coating comprising a compound capable of converting light to heat and a compound, which becomes more hydrophilic under the action of heat; (2) imagewise exposing said imaging heat-sensitive composition with a high intensity laser emitting a laser beam with an intensity at the surface of said heat-sensitive composition of at least 0.2 mW/ mu m<2> thereby at least partially removing said heat-sensitive composition to expose at least partially the lithographic support.

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

B41C 1/10

IPC 8 full level (invention and additional information)

B41C 1/055 (2006.01); B41C 1/10 (2006.01); B41N 1/14 (2006.01); C08F 220/26 (2006.01); C08F 230/08 (2006.01); C08K 5/00 (2006.01); C08L 33/14 (2006.01); G03F 7/00 (2006.01); G03F 7/20 (2006.01); G03F 7/36 (2006.01)

CPC (invention and additional information)

B41C 1/1033 (2013.01); B41C 1/105 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1057623 A1 20001206; EP 1057623 B1 20040506; DE 69917004 D1 20040609; DE 69917004 T2 20041028; JP 2001047593 A 20010220

INPADOC legal status


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2011-03-18 [REG FR ST] NOTIFICATION OF LAPSE

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2008-12-12 [REG FR TP] TRANSMISSION OF PROPERTY

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- Effective date: 20050208

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2004-06-09 [REF] CORRESPONDS TO:

- Document: DE 69917004 P 20040609

2004-05-12 [REG GB FG4D] EUROPEAN PATENT GRANTED

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2003-03-12 [17Q] FIRST EXAMINATION REPORT

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2000-12-06 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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