Try acetone

Paul


-----Original message-----
From: Steve Gregory <[log in to unmask]>
To: "[log in to unmask]" <[log in to unmask]>
Sent: Thu, Feb 9, 2012 23:23:57 GMT+00:00
Subject: Re: [TN] How can I remove solder mask?

Hi Carl,

From my experience, there are a lot of those out there that use a touch-up pen that is commercially available:

http://www.pcbsupplies.com/servlet/the-563/Solder-Mask-Repair-Overcoat/Detail

What this is, is green colored acrylic coating. You should be able to remove it with IPA if it is...

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl VanWormer
Sent: Thursday, February 09, 2012 1:00 PM
To: [log in to unmask]
Subject: [TN] How can I remove solder mask?




I have a PC board that somebody has repaired, and then painted something that looks like the standard green soldermask to cover the repair.  There is still a short circuit under the painted area.  I'd like to analyze the repair, but I don't want to just scrape off the covering with a knife blade.  Is there an easily available solvent that can be used to remove soldermask?

Thanks,
Carl


p.s. I check the archives, and was unable to get any results with the search function.  It seems to be broken . . .




Carl Van Wormer, P.E., AE7GD
Senior Hardware Engineer
Cipher Systems
1800 NW 169th Place, Suite B-100
Beaverton, OR  97006
Cipher Systems (503) 617-7447 x 5163
Direct Line (503) 425-5163
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