(19)
(11) EP 0 007 234 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.02.1980 Bulletin 1980/03

(43) Date of publication A2:
23.01.1980 Bulletin 1980/02

(21) Application number: 79301378

(22) Date of filing: 12.07.1979
(84) Designated Contracting States:
AT BE CH DE FR GB IT LU NL SE

(30) Priority: 13.07.1978 GB 2970678

(71) Applicant: BICC Limited
 ()

(72) Inventors:
  • Thomas, Alan
     ()
  • Rowlands, David Philip
     ()

   


(54) A process for the anodic treatment of a continuous web of aluminium foil, foil so obtained and its application as a lithographic printing plate


(57) luminium web (1) is passed through a first bath (2) containing phosphate ions and a second bath (3) containing sulphate ions and is anodised by passing alternating current between electrodes (4, 5) immersed one in each bath. The product is especially suitable for use as a base for a presensitised lithographic printing plate.






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