Hi Jess,
I read your message about the white residues, and just have three questions
on it:

1.) What happens during conformal coating. Is the adhesion of the lacquer
impeared due to the
     residues?

2.) What happens if some moisture comes to the coated/not coated board. Is
there some bigger
    risk by migration with the white residues?

3.) What is "EMPF", I'm from germany and  we're just customer of an
electronic manufacturer. Where could I get the
     study?

Thanks a lot for all answers,
Lars

Brose Fahrzeugteile,
Coburg, Germanny,
(++49) 9561-21-1294

-----Ursprüngliche Nachricht-----
Von: jess baker <[log in to unmask]>
An: [log in to unmask] <[log in to unmask]>
Datum: Montag, 24. August 1998 21:54
Betreff: Re: [TN] white residue


>My experience is that almost all white residues are insoluable in solvent
>or water.These generally tend to be benign residues.The formation may be
>from heat of soldering forming carboxyls with the alcohol in the flux.
>The EMPF has a study available on this.
>
>regards
>
>Jess Baker
>Robotic Process systems
>
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