(19) |
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(11) |
EP 0 770 494 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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07.05.1997 Bulletin 1997/19 |
(43) |
Date of publication A2: |
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02.05.1997 Bulletin 1997/18 |
(22) |
Date of filing: 24.10.1995 |
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(84) |
Designated Contracting States: |
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BE DE FR GB NL |
(71) |
Applicant: AGFA-GEVAERT
naamloze vennootschap |
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B-2640 Mortsel (BE) |
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(72) |
Inventors: |
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- Vermeersch, Joan,
c/o Agfa Gevaert N.V.
2640 Mortsel (BE)
- Van Damme, Marc,
c/o Agfa Gevaert N.V.
2640 Mortsel (BE)
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(54) |
A method for making a lithographic printing plate involving on press development |
(57) The present invention provides a method for making a lithographic printing plate
comprising the steps of:
(1) image-wise exposing to light an imaging element comprising (i) on a hydrophilic
surface of a lithographic base an image forming layer comprising hydrophobic thermoplastic
polymer particles dispersed in a hydrophilic binder and (ii) a compound capable of
converting light to heat, said compound being comprised in said image forming layer
or a layer adjacent thereto;
(2) and developing a thus obtained image-wise exposed imaging element by mounting
it on a print cylinder of a printing press and supplying an aqueous dampening liquid
and/or ink to said image forming layer while rotating said print cylinder.