EP 1380417 A1 20040114 - Positive-working lithographic printing plate precursor
Title (en)
Positive-working lithographic printing plate precursor
Title (de)
Positivarbeitende lithographische Druckplattenvorläufer
Title (fr)
Précurseur de plaque d'impression lithographique de type positif
Publication
Application
Priority
- EP 03101850 A 20030624
- EP 02100778 A 20020703
Abstract (en)
A positive-working lithographic printing plate precursor is disclosed which comprises (i) a grained and anodized aluminum support having a hydrophilic surface and (ii) a heat-sensitive oleophilic coating provided on the hydrophilic surface, wherein said coating is capable of dissolving in an aqueous alkaline developer at a higher dissolution rate in areas of said coating which are exposed to heat or infrared light than in unexposed areas, characterized in that the hydrophilic surface has a surface roughness, expressed as arithmetical mean center-line roughness Ra, which is less than 0.40 mu m and comprises more than 3.0 g/m<2> of aluminium oxide. The use of a low surface roughness as defined above provides an improved shelf life of the coating.
IPC 1-7
IPC 8 full level
B41C 1/10 (2006.01); B41N 1/08 (2006.01); B41N 3/03 (2006.01)
CPC (source: EP)
B41C 1/1008 (2013.01); B41N 1/083 (2013.01); B41N 3/034 (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)
Citation (search report)
- [X] EP 0704320 A1 19960403 - HOECHST AG [DE]
- [Y] EP 0693371 A1 19960124 - ROLAND MAN DRUCKMASCH [DE]
- [Y] US 4800950 A 19890131 - CRONA THEODORE J [US], et al
- [Y] US 6374737 B1 20020423 - BENNETT DAVID S [US], et al
- [Y] US 6140022 A 20001031 - VAN DAMME MARC [BE], et al
- [Y] US 5427889 A 19950627 - SAIKAWA MASAHIKO [JP], et al
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03101850 A 20030624