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June 1999

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Fri, 4 Jun 1999 12:41:12 EDT
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Chris,

It has been my experience that the contamination is do to the tin stripping
process.  Some tin strippers leave a residue that is difficult to rinse.  The
quality of the tin stripper rinses is also critical.  I'd recommend testing
some panels as they exit the stripper to compare results with post-pumice
cleaning.  There are some OEM's that require pre-soldermask ionics testing
for this very reason.

Feel free to call if you have more questions #(612)825-6113

Scott.
RBP Chemical Corp.
[log in to unmask]

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