Thanks Doug

Douglas Pauls wrote:

> In a message dated 10/30/2000 3:58:02 PM US Eastern Standard Time,
> [log in to unmask] writes:
>
> > Continuing with your thoughts, we have been able to create white res on WS
> > fluxed boards by washing them blistering hot, straight out of the wave.
> So, even
> > when we were shrewd enough to control our was temps, we were still able to
> beat ourselves.
> > Tricky eh?  Dave Fish
>
> You might be seeing the residual weak organic acids from the WS flux reacting
> with the water to turn white.  In addition to what Brian Ellis has written,
> when we see white residues, it is either abietic acid from rosin turning
> white or weak organic acids from the flux turning white.  The latter occurs
> more frequently with the low solids fluxes since they have a much higher
> level of WOAs.
>
> Doug Pauls
> CSL
>
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