Dexter also markets an in-line system for Teledyne Halco machines. Their 
equipment is based on the same theory as explained below, but it works as the 
Halco works. This allows a consistent copper level as opposed to the batch 
systems where copper builds to a point and then cleaned.

[log in to unmask]


Bob Mesick <[log in to unmask]> Wrote:
| 
| 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
| 
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