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US 4,308,091 AGranted
Etching medium and process for the correction of chromed gravure cylinders
AssigneeMerck Patent GmbH
InventorsDieter Schmitt, Wilhelm Baumer
Life of this patent
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Abstract
An etching medium for chromed surfaces, comprises amounts of aluminum chloride, hydrochloric acid and an inorganic reducing agent, effective for etching a chromed surface. This medium is particularly advantageous when used for the correction of chromed gravure cylinders.
Claims8
An etching medium for chromed surfaces, comprising amounts of aluminum chloride, hydrochloric acid and an inorganic reducing agent, effective for etching a chromed surface.
Dependencies are inferred from the claim text.