Glenn,

You might just check.  My Kester 186 RMA flux shows up very well on
components under black light.  The board is a bit trickier but pretty
obvious.  I might have some comparison (visible vs. UV illumination) pics in
my photo gallery if ya want me to send them.  Most were taken using our
Mantis.

Requests offlist so we don't get a 'me too' thread going.  (Why?)  If I get
alot I'll work it with Jack to set them up on the autoresponder.

Hans

~~~~~~~~
Hans M. Hinners
Materials (& Process!) Engineer
Warner Robins - Air Logistics Center/Avionics Production Division
Manufacturing Branch (LYPME)
380 Second Street, Suite 104    (Building 640)
Robins AFB, GA  31098-1638
912-926-1970 (Voice) 468 - 1970 (DSN)  912-926-7164 (Fax)
mailto:[log in to unmask]


> -----Original Message-----
> From: Barmuta, Mike [SMTP:[log in to unmask]]
> Sent: Tuesday, February 22, 2000 06:38
> To:   [log in to unmask]
> Subject:      Re: [TN] Residual Flux Indicator
>
> Glenn: Add a UV tracer to your flux.If flux residues are present after
> cleaning they will fluoresce when exposed to a UV(blacklight)source.
> I have used Rhodamine B in the past with water soluble fluxes.
>
> Regards
>
> Michael Barmuta
>
> Staff Engineer
>
> Fluke Corp.
>
> Everett WA
>
> 425-356-6076
>
> -----Original Message-----
> From: Glenn Pelkey [mailto:[log in to unmask]]
> Sent: Tuesday, February 22, 2000 10:31 AM
> To: [log in to unmask]
> Subject: [TN] Residual Flux Indicator
>
>
> Hi all,
>
>         Anyone familiar with a dye that can help indicate the presence of
> residual flux?  I was just talking with another engineer who mentioned a
> material called "Bromthymol Blue" that he used to use.  Is it still
> available
> or is there's something better?
>         The reason I ask is we have these small "Bumped Chip" devices on a
> board.  Historically there has been a problem with residual flux under
> these
> components, not visible to inspection and averaged out with ROSE test.  We
> want to destructively remove a few and see how effective the cleaning
> process
> is.
>
> Thanks for your help,
>
> Glenn
>
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