LITHOGRAPHIC PRINTING PLATE ORIGINAL FORM AND PLATE MAKING METHOD

Title:

LITHOGRAPHIC PRINTING PLATE ORIGINAL FORM AND PLATE MAKING METHOD

Document Type and Number:

WIPO Patent Application WO/2004/069552

Kind Code:

A1

Abstract:

A lithographic printing plate original form comprising a support (11) and a lipophilic layer (12) provided on the support (11), the lipophilic layer (12) containing a crosslinked product in which polymer having a heat decomposing radical on a main chain is crosslinked by a crosslinking agent. Such a lithographic printing plate original form can be directly plate-made by being irradiated with an infrared laser beam based on a digital signal to allow printing by directly being mounted on a printer without requiring developing after exposure. The lithographic printing plate original form has a good ablation efficiency (sensitivity), and the obtained lithographic printing plate has an excellent plate wear. A plate making method comprising the steps of exposing the lithographic printing plate original form to an infrared laser beam, and removing the lipophilic layer (12) of the exposed part.

Inventors:

HAYASHI KOJI (JP)

Application Number:

PCT/JP2004/001033

Publication Date:

August 19, 2004

Filing Date:

February 03, 2004

Export Citation:

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Assignee:

KODAK POLYCHROME GRAPHICS JP (JP)
HAYASHI KOJI (JP)

International Classes:

G03F7/004; B41C1/10; B41N1/14; G03F7/00; (IPC1-7): B41N1/14; G03F7/004; G03F7/36

Foreign References:

JPH1128871A	1999-02-02
JP2001001661A	2001-01-09
JP2000263958A	2000-09-26
JP2004090438A	2004-03-25
JP2003025531A	2003-01-29
JP2001228602A	2001-08-24
JP2001296669A	2001-10-26
JP2000250202A	2000-09-14

Other References: