EP 0908304 B1 20030402 - A method for making positive working printing plates from a heat mode sensitive imaging element
Title (en)
A method for making positive working printing plates from a heat mode sensitive imaging element
Title (de)
Verfahren zur Herstellung einer positiv arbeitenden Druckplatte aus wärmempflindlichem Bildaufzeichungsmaterial
Title (fr)
Procédé pour la fabrication d'une plaque d'impression positive à partir d'un élément pour l'enregistrement de l'image thermosensible
Publication
Application
Priority
- EP 98203119 A 19980916
- EP 97203132 A 19971008
Abstract (en)
[origin: EP0908304A1] According to the present invention there is provided a method for making lithographic printing plates including the following steps a) preparing a heat mode imaging element consisting of a lithographic base with a hydrophilic surface and a top layer which top layer is sensitive to IR-radiation, comprises a polymer, soluble in an aqueous alkaline solution and is unpenetrable for an alkaline developer containing SiO2 as silicates; b) exposing imagewise said heat mode imaging element to IR-radiation; c) developing said imagewise exposed heat mode imaging element with said alkaline developer so that the exposed areas of the top layer are dissolved and the unexposed areas of the top layer remain undissolved characterized in that said top layer includes an IR-absorbing pigment and 3,4,5-trimethoxybenzoic acid or a benzofenone.
IPC 1-7
IPC 8 full level
CPC (source: EP)
B41C 1/1016 (2013.01); B41C 2201/04 (2013.01); B41C 2210/02 (2013.01); B41C 2210/06 (2013.01); B41C 2210/14 (2013.01); B41C 2210/22 (2013.01); B41C 2210/24 (2013.01); B41C 2210/262 (2013.01)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98203119 A 19980916