| (19) |
 |
|
(11) |
EP 2 042 305 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
05.05.2010 Bulletin 2010/18 |
| (43) |
Date of publication A2: |
|
01.04.2009 Bulletin 2009/14 |
| (22) |
Date of filing: 15.09.2008 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL
PT RO SE SI SK TR |
|
Designated Extension States: |
|
AL BA MK RS |
| (30) |
Priority: |
28.09.2007 JP 2007255972
|
| (71) |
Applicant: FUJIFILM Corporation |
|
Minato-ku
Tokyo (JP) |
|
| (72) |
Inventor: |
|
- Nagashima, Akira
Haibara-gun
Shizuoka-ken (JP)
|
| (74) |
Representative: HOFFMANN EITLE |
|
Patent- und Rechtsanwälte
Arabellastrasse 4
81925 München
81925 München (DE) |
|
| |
|
| (54) |
Planographic printing plate precursor |
(57) A planographic printing plate precursor comprises a substrate and a positive recording
layer prepared on the substrate, the positive recording layer comprising two kinds
of polymer including specific copolymer components and a compound that absorbs light
and generates heat, and the solubility thereof in an alkaline developer being improved
by light-exposure or heating. A planographic printing plate precursor has a positive
recording layer which is a strong film (image area) having excellent chemical resistance
and resistance to alkaline developers and from which resistance to alkaline developers
can be quickly eliminated by exposure, and that suppresses the occurrence of abrasion
during exposure.