Chemistry: electrical and wave energy – Processes and products
Patent
1983-05-02
1984-08-28
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
2041294, 20412975, 204DIG9, 204 376, 430278, 430306, C25D 544, C25F 304, G03C 194
Patent
active
044682956
ABSTRACT:
Disclosed is a process for electrochemically roughening aluminum or alloys thereof, in an aqueous electrolyte, under the action of an alternating current which is generated by superimposing at least two types of alternating current of different frequencies. The materials roughened in this manner 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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Hoechst Aktiengesellschaft
Valentine Donald R.
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