| (19) |
 |
|
(11) |
EP 2 145 772 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
29.02.2012 Bulletin 2012/09 |
| (43) |
Date of publication A2: |
|
20.01.2010 Bulletin 2010/03 |
| (22) |
Date of filing: 15.07.2009 |
|
| (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 MK MT NL NO
PL PT RO SE SI SK SM TR |
| (30) |
Priority: |
16.07.2008 JP 2008185198
|
| (71) |
Applicant: FUJIFILM Corporation |
|
Minato-ku
Tokyo (JP) |
|
| (72) |
Inventors: |
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- Sawada, Hirokazu
Shizuoka (JP)
- Kurokawa, Shinya
Shizuoka (JP)
- Uesugi, Akio
Shizuoka (JP)
|
| (74) |
Representative: HOFFMANN EITLE |
|
Patent- und Rechtsanwälte
Arabellastraße 4
81925 München
81925 München (DE) |
|
| |
|
| (54) |
Method of manufacturing aluminum alloy plate for lithographic printing plate, aluminum
alloy plate for lithographic printing plate, lithographic printing plate support and
presensitized plate |
(57) A method of manufacturing an aluminum alloy plate for a lithographic printing plate
includes a semicontinuous casting step for forming an ingot containing up to 0.15
wt% of iron from an aluminum alloy melt, a scalping step for scalping the ingot formed
in the semicontinuous casting step to render the ingot into a plate form, a hot rolling
step for rolling the ingot in the plate form following the scalping step to obtain
a rolled plate, and a cold rolling step in which the rolled plate following the hot
rolling step is subjected to cold rolling at a total draft exceeding 88% to obtain
an aluminum alloy plate with a thickness of at least 0.1 mm. A lithographic printing
plate having an excellent resistance to spotting is obtained.