| (19) |
 |
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(11) |
EP 0 685 333 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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10.01.1996 Bulletin 1996/02 |
| (43) |
Date of publication A2: |
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06.12.1995 Bulletin 1995/49 |
| (22) |
Date of filing: 11.05.1993 |
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| (84) |
Designated Contracting States: |
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BE DE FR GB NL |
| (30) |
Priority: |
05.06.1992 EP 92201633
|
| (62) |
Application number of the earlier application in accordance with Art. 76 EPC: |
|
93201354.3 / 0573091 |
| (71) |
Applicant: AGFA-GEVAERT
naamloze vennootschap |
|
B-2640 Mortsel (BE) |
|
| (72) |
Inventor: |
|
- Leenders, Luc,
c/o Agfa-Gevaert N.V.
B-2640 Mortsel (BE)
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| |
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|
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Remarks: |
|
This application was filed on 23 - 06 - 1995 as a divisional application to the application
mentioned under INID code 60. |
|
| (54) |
A heat mode recording material and method for producing driographic printing plates |
(57) The present invention provides a method for making a lithographic printing plate
requiring no dampening liquid comprising the steps of:
- image-wise exposing using a laser beam a heat mode recording material comprising on
a support having an oleophilic surface (i) a recording layer having a thickness of
not more than 3µm and containing a substance capable of converting the laser beam
radiation into heat and (ii) a cured oleophobic surface layer and wherein said recording
layer and oleophobic surface layer may be the same layer;
- rubbing the exposed heat mode recording material thereby removing said oleophobic
surface layer in the exposed areas so that the underlying oleophilic surface is exposed
and
- avoiding the swelling of said oleophobic surface layer by carrying out said rubbing
without the use of a liquid.