EP 0894642 B1 20020515 - Coated dummy plates.
Title (en)
Coated dummy plates.
Title (de)
Beschichtete Blindplatten
Title (fr)
Plaques blanches revêtues
Publication
Application
Priority
- EP 98202379 A 19980713
- EP 97202383 A 19970730
Abstract (en)
[origin: EP0894642A1] The invention relates to a dummy plate for offset printing which essentially consists of a plate-, sheet- or band-form, mechanically and/or electro-chemically roughened, anodically oxidized and optionally hydrophilized aluminium support and a non-photosensitive, water-soluble protective layer applied thereto, characterized in that the layer contains a water-soluble organic compound which contains at least one OH- or NH-acidic group having a pKa value of </= 8 as acid or salt, and has a layer thickness which is smaller than the average roughness ra of the support material, determined by optical means. Even after extended storage at elevated temperature, the dummy plate can easily be used without an additional development step and exhibits no tendency to stick.
IPC 1-7
IPC 8 full level
CPC (source: EP)
B41N 1/083 (2013.01); B41N 3/03 (2013.01); B41N 3/036 (2013.01)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98202379 A 19980713