| (19) |
 |
|
(11) |
EP 1 262 318 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
15.01.2003 Bulletin 2003/03 |
| (43) |
Date of publication A2: |
|
04.12.2002 Bulletin 2002/49 |
| (22) |
Date of filing: 31.05.2002 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
01.06.2001 JP 2001166863
|
| (71) |
Applicant: Fuji Photo Film Co., Ltd. |
|
Kanagawa, Shizuoka (JP) |
|
| (72) |
Inventors: |
|
- Miyake, Hideo
Yoshida-cho, Haibara-gun, Shizuoka (JP)
- Mitsumoto, Tomoyoshi
Yoshida-cho, Haibara-gun, Shizuoka (JP)
- Oda, Akio
Yoshida-cho, Haibara-gun, Shizuoka (JP)
|
| (74) |
Representative: HOFFMANN - EITLE |
|
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE) |
|
| |
|
| (54) |
Lithographic printing plate precursor |
(57) A lithographic printing plate precursor of double-layer structure comprising a support,
an alkali-soluble resin-containing layer and a positive-working recording layer provided
on the alkali-soluble resin-containing layer, which contains an infrared absorbent
and is capable of increasing solubility in an aqueous alkali solution upon exposure
to infrared laser, wherein the positive-working recording layer contains an alkali-soluble
novolak resin having xylenol as a structural unit; and a method of processing the
lithographic printing plate precursor comprising developing the exposed lithographic
printing plate precursor with an alkaline developer containing a pH buffering organic
compound and a base.