EP 1097811 B1 20031112 - A method for making a lithographic printing plate by a negative working non-ablative process
Title (en)
A method for making a lithographic printing plate by a negative working non-ablative process
Title (de)
Negativ arbeitendes Verfahren zur Herstellung einer lithographischen Druckplatte ohne Ablation
Title (fr)
Procédé de fabrication d'une plaque d'impression lithographique travaillant en négatif et sans ablation
Publication
Application
Priority
EP 99203682 A 19991103
Abstract (en)
[origin: EP1097811A1] According to the present invention there is provided a method for making a lithographic printing plate comprising the steps of- applying a first magnetic field to a dry, light absorbing powder, which comprises a magnetic material and a hydrophobic thermoplastic binder, thereby coating said powder on a surface of a metal support; image-wise exposing to light the powder in contact with the surface of the metal support, thereby increasing the adhesion of the powder to the surface of the metal support, without substantially ablating the powder; and removing the non-exposed magnetic powder from the surface of the metal support under action of a second magnetic field with a polarity substantially opposite to the first magnetic field.
IPC 1-7
IPC 8 full level
G03F 7/004 (2006.01); B41C 1/055 (2006.01); B41C 1/10 (2006.01); B41N 1/14 (2006.01); G03F 7/00 (2006.01)
CPC (source: EP)
B41C 1/1066 (2013.01); B41C 1/1058 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1097811 A1 20010509; EP 1097811 B1 20031112; DE 69912792 D1 20031218; DE 69912792 T2 20040923; JP 2001171068 A 20010626
DOCDB simple family (application)
EP 99203682 A 19991103; DE 69912792 T 19991103; JP 2000332629 A 20001031