
doi: 10.1149/1.3071307
The bright copper plates obtained from various solutions heretofore proposed are not comparable in appearance with the bright nickel deposits commercially produced today. Upon adding ammonium sulfate to the copper amine baths recommended by Brockman, bright ductile plates of copper were obtained. The new commercial bath contains 100 g./L. copper sulfate crystals, 20 g./L. ammonium sulfate, 80 cc./L. diethylene triamine.
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