Title:
LASER RESPONSIVE LITHOGRAPHIC PRINTING PLATE ORIGINAL PLATE
Document Type and Number:
Japanese Patent JP3463404
Kind Code:
B2
Abstract:
PURPOSE: To obtain a laser responsive lithographic printing plate original plate in which ink can be efficiently repelled without impairing laser response by forming an ink repellent layer as a hydrophilic swelled layer in a lithographic printing plate obtained by laminating at least a laser responsive layer and the ink repellent layer in this order on a board.
CONSTITUTION: In a lithographic printing plate obtained by laminating at least a laser responsive layer and an ink repellent layer in this order on a board, a hydrophilic swelled layer is used as the repellent layer. The swelled layer is formed to have a phase isolation structure formed of at least two layers of the phase containing at least hydrophilic polymer as a main ingredient and the phase containing hydrophobic polymer as a main ingredient. The laser responsive layer and the swelled layer causes a destructive absorption to response to an active light ray due to the emission of a laser. Thus, the responsive layer is formed of at least binder resin and thermal absorbent having absorption in a laser emitting wavelength band.
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Inventors:
Masanao Isono
Norimasa Ikeda
Norimasa Ikeda
Application Number:
JP8949695A
Publication Date:
November 05, 2003
Filing Date:
April 14, 1995
Export Citation:
Assignee:
Toray Industries, Inc.
International Classes:
B41C1/055; B41N1/10; B41N1/14; G03F7/00; (IPC1-7): B41N1/14
Domestic Patent References:
| JP6199064A |