Try a mixture of  NaOH  up to 20% and methanol or ethanol up to 15%
This will strip most soldermasks so should do the job

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Eric Masters
Sent: 24 November 1999 22:36
To: [log in to unmask]
Subject: [TN] Dryfilm dye staining on laminate

I'm having a perplexing problem with what appears to be dye staining on
Teflon laminate.

The laminate is 6010 LM Teflon.  The stain occurs in the developer, on
exposed Teflon areas.  Running the material through a fresh developer
solution eliminates the staining; the problem is I have a number of parts
that are already stained and I need to remove it.  I've tried various
cleaners, solvents, and of course, stripper solution.  Nothing seems to
affect the stain.

Anyone have any suggestions that will help me remove this stain?

Thanks.

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