Brian, I have the answer to the string quiz. Long enough to reach from one tin can to the other tin can. Was I rite?

Ron Dieselberg
Trainer/Auditor
CMC ELECTRONICS
CINCINNATI
[log in to unmask]

-----Original Message-----
From:   Brian Ellis [mailto:[log in to unmask]]
Sent:   Friday, March 22, 2002 19:30 PM
To:     [log in to unmask]
Subject:        Re: [TN] PCB exposure to solvents

Michael

It all depends on the solvent. MEK is a fairly aggressive and toxic
solvent. I'd suggest trying to find a milder one, such as one of the
paraffins. I'll answer your question with another: how long is a piece
of string?

Brian

"KIPPING, Michael (York Rd)" wrote:
>
> Hi there
>
> We conformally coat our PCB assemblies using an acrylic and use Methyl Ethyl
> Ketone to strip assemblies if they require rework.
> Has anyone carried out any work on the maximum exposure time you can expose
> PCBs to solvents?  (I realise that it will depend on the laminate materials,
> component constuction etc.)
>
> Thanks
>
> Michael Kipping
>
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