EP 0986484 A1 20000322 - METHOD OF PREPARING A PRINTING PLATE
Title (en)
METHOD OF PREPARING A PRINTING PLATE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINER DRUCKPLATTE
Title (fr)
PROCEDE DE PREPARATION D'UNE PLANCHE D'IMPRESSION
Publication
Application
Priority
- EP 9803480 W 19980603
- GB 9711392 A 19970603
Abstract (en)
[origin: GB2325890A] A method for preparing a lithographic printing plate which involves providing a plate precursor comprising a grained and anodised aluminium substrate coated with a metallic layer, preferably a silver layer, imagewise exposing this precursor by means of a high intensity laser beam to remove the metallic layer in the exposed areas and treating the exposed surface of the plate with a chemical composition in order to enhance the oleophilic character of image areas and the hydrophilic character of non-image areas. The method provides press ready plates showing high image quality, good press properties and high durability on press, whilst eliminating the requirement of the use of intermediate film and developer chemistry. The composition preferably comprises an enzyme, an oleophilic agent such as mercapto compound or a cationic surfactant, and a desensitiser such as gum arabic, dextrin or a carbohydrate.
IPC 1-7
IPC 8 full level
B41C 1/10 (2006.01); B41N 1/08 (2006.01); G03F 7/00 (2006.01)
CPC (source: EP)
B41C 1/1033 (2013.01); B41N 1/083 (2013.01)
Citation (search report)
See references of WO 9855331A1
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
GB 2325890 A 19981209; GB 9811833 D0 19980729; EP 0986484 A1 20000322; GB 9711392 D0 19970730; JP 2002508717 A 20020319; WO 9855331 A1 19981210
DOCDB simple family (application)
GB 9811833 A 19980603; EP 9803480 W 19980603; EP 98929438 A 19980603; GB 9711392 A 19970603; JP 50158999 A 19980603