(19) |
 |
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(11) |
EP 1 543 899 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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21.12.2005 Bulletin 2005/51 |
(43) |
Date of publication A2: |
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22.06.2005 Bulletin 2005/25 |
(22) |
Date of filing: 17.12.2004 |
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(84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI
SK TR |
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Designated Extension States: |
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AL BA HR LV MK YU |
(30) |
Priority: |
17.12.2003 EP 03079025
|
(71) |
Applicant: Fuji Photo Film B.V. |
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5047 TK Tilburg (NL) |
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(72) |
Inventors: |
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- Wiegers, Ronaldus Johannes Theodor Hermanus
5237 NA 's-Hertogenbosch (NL)
- Sekiya, Toshiyuki
5045 JW Tilburg (NL)
- Koopmans, Sipke Jan
5045 LP Tilburg (NL)
|
(74) |
Representative: Winckels, Johannes Hubertus F. et al |
|
Vereenigde,
Johan de Wittlaan 7 2517 JR Den Haag 2517 JR Den Haag (NL) |
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|
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(54) |
Aluminium alloy substrate for digitally imageable lithographic printing plate and
process for producing the same |
(57) Disclosed is a method for the production of an aluminium alloy support for a digitally
imageable lithographic printing plate, comprising forming a support by carrying out
the subsequent steps of:
- continuously casting a molten aluminium alloy to form a strip having a thickness less
than 30 mm;
- cold rolling said strip to form said support;
- optionally a heat treatment step of said support;
- correction of the support; and
- mildly graining said support;
followed by providing a digitally imageable coating on said support, whereby said
printing plate is obtained, characterized in that said aluminium alloy composition
contains an iron amount between 0.15% by weight and 0.50% by weight; a silicon amount
between 0.05% by weight and 0.20% by weight; and a copper amount between 0.005% by
weight and 0.040% by weight.