(19)
(11) EP 2 529 944 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.12.2013 Bulletin 2013/52

(43) Date of publication A2:
05.12.2012 Bulletin 2012/49

(21) Application number: 12161749.2

(22) Date of filing: 28.03.2012
(51) International Patent Classification (IPC): 
B41N 3/03(2006.01)
 C25F 3/04(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 28.03.2011 JP 2011070294
06.03.2012 JP 2012049076

(71) Applicant: Fujifilm Corporation
Minato-ku Tokyo 106-8620 (JP)

(72) Inventors:
  • Komatsu, Hiroshi
    Shizuoka, 421-0396 (JP)
  • Hotta, Hisashi
    Shizuoka, 421-0396 (JP)

(74) Representative: HOFFMANN EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Method for producing lithographic printing plate original plate and method for roughening surface of aluminium support body


(57) There is provided a method of producing a lithographic printing plate original plate and a method for roughening a surface of an aluminum support body, wherein pits having a smaller average pit diameter and being uniform in diameter can be dispersedly formed on the surface of the aluminum support body, with a high density.
In a method for producing a lithographic printing plate original plate, the method comprising an electrolytic surface-roughening treatment step for an aluminum support body (230), an electrolysis treatment is performed in an acidic solution (210) having a dissolved oxygen concentration of 6.0 mg/l or less in the electrolytic surface-roughening treatment step.







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