(19)
(11) EP 0 770 494 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.05.1997 Bulletin 1997/19

(43) Date of publication A2:
02.05.1997 Bulletin 1997/18

(21) Application number: 95202874.4

(22) Date of filing: 24.10.1995
(51) International Patent Classification (IPC)6B41M 5/36, B41C 1/10
(84) Designated Contracting States:
BE DE FR GB NL

(71) Applicant: AGFA-GEVAERT naamloze vennootschap
B-2640 Mortsel (BE)

(72) Inventors:
  • Vermeersch, Joan, c/o Agfa Gevaert N.V.
    2640 Mortsel (BE)
  • Van Damme, Marc, c/o Agfa Gevaert N.V.
    2640 Mortsel (BE)

   


(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.







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