Newton's Rings: [sdiy] solvents/cleaners for flux

[Tim Ressel]

Yo,

Back in the good ol' days before the EPA, we would mix
TCE and alcohol 50/50. The combo worked better than
either alone. For that all-over clean feeling, I use
distilled water in a squirt bottle. A little dry heat
from a warm oven dries the board nicely.

--tr

--- Cynthia Webster <cynthia.webster at gte.net> wrote:
> on 8/13/03 9:07 PM, Glen at mclilith at charter.net
> wrote:
> 
> > At 11:17 PM 8/13/03 , Cynthia Webster wrote:
> > 
> >> I hold them so the the liquid will drain straight
> down onto the ground, and
> >> after the first scrub they're usually a bit
> sticky, so I repeat the whole
> >> process and the boards come out very clean and
> professional looking
> >> however after flipping the boards around... this
> results in rainbow Newton's
> >> rings type patterns on the ~component~ sides, 
> which look like someone's
> >> poured lighter fluid or gasoline on them!  (Not a
> good look)
> > 
> > Is the component-side mess caused by tilting the
> boards so much that the
> > chemicals run around to the component side?
> > 
> > Perhaps instead, you are having trouble with
> chemicals passing through some
> > unused, or only partially filled, component holes?
> > 
> > Once we know the route the chemicals take, we
> might be able to invent a
> > solution for your problem.
> > 
> > 
> > later,
> > Glen Berry
> 
> Hi Glen!
> 
> Well, I usually hold the boards perpendicular to the
> ground,
> (the same orientation as the hand of a traffic cop
> saying "Stop!"
> 
> Holding the board parallel with the ground
> components down doesn't
> seem to solve the problem either.
> 
> I've even tried just spraying only the brush itself,
> but that in not enough.
> 
> I think the solvent curls around the four outside
> edges onto the other side?
> 
> Some kind of an airbrush artist's friskette?  (sp?)
> 
> Your post made me think a little, and perhaps a
> solution solution, :)
> might be to saturate a large sponge with the liquid,
> and simply set
> the board (rosin side down) on top of the sponge for
> a couple of minutes?
> 
> Like a jumbo version of those postage stamp wetting
> sponge jar thingies
> from offices past.
> 
> Does anyone know of a brand of flux remover that
> evaporates completely
> cleanly?   This is PureTronics brand flux remover
> spray in a blue spraycan
> 
> 
> 


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