(19) |
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(11) |
EP 1 690 685 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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28.03.2007 Bulletin 2007/13 |
(43) |
Date of publication A2: |
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16.08.2006 Bulletin 2006/33 |
(22) |
Date of filing: 02.02.2006 |
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(51) |
International Patent Classification (IPC):
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(84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE
SI SK TR |
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Designated Extension States: |
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AL BA HR MK YU |
(30) |
Priority: |
09.02.2005 JP 2005033310
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(71) |
Applicant: FUJIFILM Corporation |
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Minato-ku
Tokyo (JP) |
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(72) |
Inventors: |
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- Hatanaka, Yusuke
c/o Fuji Photo Film Co., Ltd.
Haibara-gun
Shizuoka-ken (JP)
- Watanabe, Kotaro
c/o Fuji Photo Film Co., Ltd.
Haibara-gun
Shizuoka-ken (JP)
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(74) |
Representative: HOFFMANN EITLE |
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Patent- und Rechtsanwälte
Arabellastrasse 4 81925 München 81925 München (DE) |
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(54) |
Planographic printing plate precursor |
(57) The planographic printing plate precursor according to the invention is a planographic
printing plate precursor, comprising a support and a recording layer formed on the
support containing a sulfonium salt (A), an alkali-soluble resin (B), and an infrared
absorbent (C), wherein the sulfonium salt (A) has a solubility of 25 mg/ml or more
in aqueous 0.1 mol/L NaOH solution having a liquid temperature of 25°C at normal room
temperature and atmospheric pressure. The invention provides a high-sensitivity planographic
printing plate precursor that allows direct plate making by scanning exposure based
on digital signals, for example and also suppresses generation of development scum.