(19)
(11) EP 0 113 521 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.08.1986 Bulletin 1986/34

(43) Date of publication A2:
18.07.1984 Bulletin 1984/29

(21) Application number: 83307185

(22) Date of filing: 24.11.1983
(84) Designated Contracting States:
DE FR GB

(30) Priority: 26.11.1982 JP 20598382

(71) Applicant: FUJI PHOTO FILM CO., LTD.
 ()

(72) Inventors:
  • Arai, Toshifumi Asahi Shimbun Publishing Company
     ()
  • Kitago, Harumasa Fuji Photo Film Co. Ltd.
     ()
  • Nakagoshi, Isao Fuji Photo Film Co. Ltd.
     ()
  • Miyano, Shizuo Fuji Photo Film Co. Ltd.
     ()
  • Kita, Nobuyuki Fuji Photo Film Co. Ltd.
     ()

   


(54) Light-sensitive lithographic printing plate precursor


(57) The printing plate precursor is an aluminium support (1) with a hydrophilic surface and a photosensitive layer (2) formed thereon. The cut edges of the aluminium support are treated with a desensitizing solution, which is an aqueous solution containing a hydrophilic organic polymeric compound such as gum arabic, to form a layer (3) of the polymeric compound on the cut edges. The printing plate obtained from this precursor provides printed matter free of scumming at the parts corresponding to the edges of the plate.






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