EP 0908305 A1 19990414 - 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 wärmeempflindlichem Bildaufzeichnungsmaterial

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

EP 0908305 A1 19990414 (EN)

Application

EP 98203120 A 19980916

Priority

EP 98203120 A 19980916
EP 97203133 A 19971008

Abstract (en)

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 having on a lithographic base with a hydrophilic surface a first layer including a polymer, soluble in an aqueous alkaline solution and a top layer on the same side of the lithographic base as the first layer which top layer is sensitive to IR-radiation and is unpenetrable for an alkaline developer containing SiO2 as silicate; 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 and the underlying areas of the first layer are dissolved and the unexposed areas of the first layer remain undissolved characterized in that said top layer includes an IR-dye.

IPC 1-7

B41C 1/10; B41M 5/36

IPC 8 full level

B41C 1/10 (2006.01); B41M 5/36 (2006.01)

CPC (source: EP)

B41C 1/1016 (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)

Citation (search report)

[XY] GB 1155035 A 19690611 - AGFA GEVAERT NV [BE]
[X] GB 1245924 A 19710915 - AGFA GEVAERT [BE]
[Y] US 5466557 A 19951114 - HALEY NEIL F [US], et al
[X] GB 1154568 A 19690611 - AGFA GEVAERT NV [BE]
[A] EP 0732628 A1 19960918 - MINNESOTA MINING & MFG [US]
[A] EP 0347245 A2 19891220 - FUJI PHOTO FILM CO LTD [JP]
[A] GB 1160221 A 19690806 - AGFA GEVAERT NV [BE]

Designated contracting state (EPC)

BE DE FR GB

DOCDB simple family (publication)

EP 0908305 A1 19990414; EP 0908305 B1 20011128; EP 0908305 B2 20060719

DOCDB simple family (application)

EP 98203120 A 19980916