Process for producing aluminum support for printing-plate

Details Process for producing aluminum support for printing-plate Process for producing aluminum support for printing-plate

1989-03-30

1991-09-03

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

20412935, 2041294, 20412975, 204DIG9, C25F 304, C25D 544

Patent

active

050451570

ABSTRACT:
A process for producing support for aluminum printing-plate in which an aluminum support is electrochemically surface-roughed uses an alternating current in an acid electrolyte containing nitric acid. The alternating current has a waveform in which the frequency is within a range of 60 to 140 Hz and the ratio of an anode time t.sub.F to a period T, that is, t.sub.F /T, is within a range of 0.33 to 0.15, and this current is used as an electrolytic power source.

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patent: 4741812 (1988-05-01), Kojima

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