I saw a message over New Years that I don't have any more form someone who
wanted to remove copper for a solder bath.

If you heat the bath to just over the eutectic point, I believe its 3 or 4
deg F over, and let it sit, the copper comes to the top as a copper colored
scum.  You can just skim it off.  It takes 8-12 hours of sitting.  There is
still copper in the solder but the concentration is low enough to test OK
and it solders bright again.

Some of the solder coating services used to buy or make an extra solderpot
just to hold the dross and old solder at the eutectic point to purify it.

Regards,

Bob Mesick

Remco Engineering
Industrial Water and Wastewater Treatment Systems
San Luis Obispo, California  USA

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************