EP 1057623 A1 20001206 - 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
Application
Priority
EP 99201791 A 19990604
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
IPC 8 full level
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 (source: EP)
B41C 1/1033 (2013.01); B41C 1/105 (2013.01)
Citation (search report)
- [X] EP 0819986 A1 19980121 - AGFA GEVAERT NV [BE]
- [A] EP 0890879 A2 19990113 - AGFA GEVAERT AG [DE]
- [A] EP 0911153 A1 19990428 - KONISHIROKU PHOTO IND [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1057623 A1 20001206; EP 1057623 B1 20040506; DE 69917004 D1 20040609; DE 69917004 T2 20041028; JP 2001047593 A 20010220
DOCDB simple family (application)
EP 99201791 A 19990604; DE 69917004 T 19990604; JP 2000164491 A 20000601