EP 1295717 B1 20070725 - Heat-sensitive positive-working lithographic printing plate precursor
Title (en)
Heat-sensitive positive-working lithographic printing plate precursor
Title (de)
Wärmeempfindlicher positiv arbeitender Flachdruckplattenvorläufer
Title (fr)
Précurseur de plaque lithographique positive sensible à la chaleur
Publication
Application
Priority
- EP 02102309 A 20020905
- EP 01000495 A 20010924
Abstract (en)
[origin: EP1295717A2] A lithographic printing plate precursor is disclosed which comprises (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer and (ii) a coating provided thereon, the coating comprising an oleophilic layer which, upon image-wise exposure to heat or infrared light and subsequent immersion in an aqueous alkaline developer, dissolves in the developer at a higher dissolution rate in exposed areas than in unexposed areas, wherein the oleophilic layer comprises a polymer that is soluble in the developer and an organic dye in a amount sufficient to provide a visible color to the coating, characterized in that said organic dye does not reduce the dissolution rate of the unexposed areas in the developer. By using non-inhibiting dyes, the sensitivity of the precursor upon image-wise exposure is increased.
IPC 8 full level
CPC (source: EP)
B41C 1/1008 (2013.01); B41C 1/1016 (2013.01); B41N 1/08 (2013.01); B41C 2210/02 (2013.01); B41C 2210/06 (2013.01); B41C 2210/22 (2013.01); B41C 2210/24 (2013.01); B41C 2210/262 (2013.01)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 1295717 A2 20030326; EP 1295717 A3 20030716; EP 1295717 B1 20070725
DOCDB simple family (application)
EP 02102309 A 20020905