Chemistry: electrical and wave energy – Processes and products
Patent
1985-07-03
1986-10-28
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
2041299, 204 51, C25D 1138, C25D 536
Patent
active
046197427
ABSTRACT:
A process for producing chromium-plated, steel-based printing plate carriers comprises (A) simultaneously roughening and partially chromium-plating a substrate using alternating current in an electrolyte containing chromium, chloride, sulfate and, if appropriate, strontium ions and then, in the same electrolyte, (B) employing direct current to effect final chromium-plating. The printing plate supports produced in this manner have a uniform surface topography and peak-to-valley height values that are favorable for coating.
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Chapman Terryence
Hoechst Aktiengesellschaft
Niebling John F.
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