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Fri, 23 May 2008 13:01:33 -0700 |
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Ioan Tempea:
Is the mask covering both bare laminate and Copper? Is there a difference in removal difficulty bare board vs. exposed Copper?
If the exposed Copper is the big problem, I strongly suspect that treating bare Copper with a good anti-tarnish might extend strip time window.
Rudy Sedlak
RD Chemical Company
--- On Fri, 5/23/08, Ioan Tempea <[log in to unmask]> wrote:
> From: Ioan Tempea <[log in to unmask]>
> Subject: [TN] Water soluble masking
> To: [log in to unmask]
> Date: Friday, May 23, 2008, 12:52 PM
> Dear Technos,
>
>
>
> I am testing WS solder masking substances and what I see is
> that they
> wash perfectly if relatively fresh (barely cured or after a
> couple of
> hours on the board) and they wash very poorly if passed in
> the in-line
> machine 24 or 48 hours after the application.
>
>
>
> Is this natural? What is your experience?
>
>
>
> Chemtronics have a note on the bottle requesting washing
> within 48
> hours, nothing marked on the Techspray bottle, but both are
> very
> difficult to remove after 24 hours.
>
>
>
> Thanks,
>
>
>
> Ioan
>
>
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