Reddening Copper

I was wondering if anyone knows of a method of coloring copper to a deep reddish hue without making the piece dull.

Tony Contreras
- Henderson, Nevada, USA
2003

Try to dip it in a solution of chromic acid, also containing H2SO4. Had good results, perfect red, like new!

Bye,

Ruud Kooijman
- Venlo, Holland, The Netherlands
2003

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