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Rack stripper formula

Does anybody know of a good, non-proprietary formula for stripping acid copper,tin/lead plating racks? I would like something nitric acid based but stabilized against NOx release.

Thanks,

Scott Campbell
- Tempe, Arizona, USA
2003

What substrate are your racks made of?

Casey Weizel, President
Foresight Finishing LLC

- Tempe, Arizona

2003

Various things have been suggested to minimize NOX NH4 e.g., NH4NO3, urea nitrate, sulfamic acid ⇦ on eBay or Amazon [affil link] as additives to 50-70% nitric Be careful try in small trial tank first Also try floating a 1 inch layer of thin paraffin oil. This is surprisingly effective.

Geoffrey Whitelaw
- Port Melbourne, Australia
2003

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