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topic 7978

NON-WIPE COPPER BLACKENING SYSTEM


(2001)

I recently read a response by Ray Delorey), letter 1198 regarding chemically blackening copper. Ray recommended a 1% -- room-temperature dip of "zinc purifier" that is used in a "cyanide zinc process" as a non-wipe system for this blackening process. I would appreciate help in locating a source(s) for this "zinc purifier".

Thanks much,

RON RITSCHER
- Springfield, Missouri, USA



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