Process for electrochemically roughening aluminum for printing p

Details Process for electrochemically roughening aluminum for printing p Process for electrochemically roughening aluminum for printing p

1983-05-02

1984-11-13

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

204 38A, 2041294, 20412946, 20412975, 204DIG9, 204 376, C25D 544, C25D 500, C25F 304

Patent

active

044824343

ABSTRACT:
Disclosed is a process for electrochemically roughening aluminum or alloys thereof, in an aqueous electrolyte, under the action of an alternating current having a frequency in the range from 0.3 to 15 Hz. The materials roughened in this way are used as supports for radiation-sensitive reproduction coatings in the field of manufacturing offset-printing plates. Also disclosed are roughened aluminum supports and printing plates produced by the above process.

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Dowell, "The Alternating Current Etching of Aluminium Lithographic Sheet," Transactions of the Inst. of Metal Finishing, 1979, vol. 57, pp. 138-144.

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