Electrolytically processing method

Application Number: 00109420
Application Date: 2000.06.23
Publication Number: 1279303
Publication Date: 2001.01.10
Priority Information: 1999/6/25 JP 179788/1999
International: C25D11/04;C25D21/12
Applicant(s) Name: Fuji Photo Films Co., Ltd.
Inventor(s) Name: Uesugi Akio
Patent Agency Code: 72002
Patent Agent: gan ling
Abstract An electrolytic treatment method for manufacturing a planographic printing plate support body assures uniform surface-roughening and a predetermined rough surface. Graphite electrodes 1, 2 and an auxiliary electrode 3 are arranged and installed in different electrolytic cells 9, 11. A current is supplied to the auxiliary electrode 3 by controlling a phase angle of waveforms generated by a power source 4 as symmetrical alternating waveforms. The quantity of electrical power to the auxiliary electrode 3 is set in the range of 0.5% to 9% of the total electrode electric power quantity. In addition, the resistance value of a support roller 7 of an aluminum web 6 is set to 0.01 MOMEGA or more and the frequency of the symmetrical alternating current waveform is set in the range of 50 Hz to 80 Hz. The current density of the main electrodes 1, 2 is set in the range of 5 A/dm2 to 50 A/dm2.