> I was looking at other flux removers for the same solder 
> (still have lots of 
> it left), and noticed flux-removers for "no-clean" solders.  
> Huh?  Why have a 
> cleaner for a no-clean product?  Is it just that it is not 
> *necessary* to be 
> cleaned (ie: not corrosive, so not necessay)?

"no-clean" is a misnomer.  It is more correctly called "low-residue".
Depending on the final application and also on the soldering temperature
profile it may not be necessary to remove the residue from the board.
In theory, the application of heat during the soldering process
transforms the flux to something resembling an acrylic.

Water-soluble fluxes are tend to be very active and should always be
removed.  Use deionized water if possible or at least for a final rinse.
Leaving the flux behind is very bad.  Water soluble fluxes are very
hydroscopic.

Most if not all solder manufacturers should be able to provide you with
a data sheet showing the bulk resitance of the flux post-solder.

TechSpray makes a good cleaner that works reasonably well on RMA and
no-clean flux residues.

Rob
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