In a former life, we had two customers who did the ionic contamination 
test on both the bare boards (regularly) and the components 
(occasionally) before assembly. One of them was using a DIN F-SW 32 flux 
with about 25% solids which left an awful gunge. The other used a low 
solids type (forget the details). Both were in the telecomms business. 
This was over 25 years ago, when I was in the ionic contamination tester 
business.

Now I'm just an ancient retired codger whose earliest memory of public 
affairs was the mourning over the death of King George V in 1936 (my 
mother was a confirmed royalist!!!). Now, of course, I can hardly 
remember what I did yesterday!

Brian



On 04/12/2015 18:57, Douglas Pauls wrote:
> Good morning all,
>
> As you wrestle with Dave's element question, I have a question or questions
> for you.
>
> For those of you who are manufacturing product using no-clean technology
> and no cleaning, Do you do ROSE testing on the no-clean units and if so, do
> you consider the ROSE tested assembly still viable or is it scrapped?
>
> If you want to reply off-channel, that is fine.  Thanks.
>
>
> Doug Pauls
> Principal Materials and Process Engineer
> Rockwell Collins
>
>
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