| (19) |
 |
|
(11) |
EP 1 543 958 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.12.2005 Bulletin 2005/52 |
| (43) |
Date of publication A2: |
|
22.06.2005 Bulletin 2005/25 |
| (22) |
Date of filing: 21.04.2004 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
|
|
Designated Extension States: |
|
AL HR LT LV MK |
| (30) |
Priority: |
18.12.2003 EP 03104786
|
| (71) |
Applicant: AGFA-GEVAERT |
|
2640 Mortsel (BE) |
|
| (72) |
Inventors: |
|
- Van Aert, Huub
2640, Mortsel (BE)
- Groenendaal, Bert
2640, Mortsel (BE)
- Van Damme, Marc
2640, Mortsel (BE)
|
|
| |
|
| (54) |
Heat-sensitive lithographic printing plate precursor. |
(57) According to the present invention there is provided a positive-working lithographic
printing plate precursor which comprises on a support having a hydrophilic surface
or which is provided with a hydrophilic layer, an oleophilic coating comprising an
infrared absorbing agent, an alkali-soluble polymeric binder and a polysiloxane which
comprises at least one carboxylic acid group or a salt thereof. The disclosed printing
plate precursor has an improved sensitivity and at the same time a high under exposure
latitude and a high developer resistance.