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topic 9832

Non-CN Gold Strip


We are looking for a non-CN stripping solution to strip gold. In our "perfect" world it would be safe for aluminum, stainless steel and copper. I am open to any suggestions at this point though.

Chris Rossiter
- Hayward, California, USA


If your base metals are copper based you can try sulphuric acid -glycerol based formulations or sulphuric acid-copper sulphate formulations.


Venkat Raja
- Kitchener, Ontario, Canada


An acid thiourea process was patented in 1986 and has been used in many parts of the world. It however is not the perfect stripper for you as it also strips copper. It is also used to strip silver on semiconductor packages prior to solder plating. In this case the copper is brightened without substantial removal. Also used in the jewelry industry after precious metal casting for brightening and deoxidizing the parts.

gwynne edson
Gwynne I Edson
- Huntington Beach, California

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