Thanks for all the suggestions and information.

 

I obtained some Methylene Chloride and some MEK.  I tried soaking the
area with each for about 10 minutes, but there was no significant
softening.  I gave up and carefully scraped off the top of the traces
with a new X-ACTO blade.  I was able to see the defects below the mask.

 

Thanks,
Carl

 

 

From: Inge Hernefjord [mailto:[log in to unmask]] 
Sent: Friday, February 10, 2012 10:49 PM
To: TechNet E-Mail Forum; Carl VanWormer
Subject: Re: [TN] How can I remove solder mask?

 

We use Ristoff C8. If it's the best or not, i've no idea. We use it just
for small repairs and mods.

We buy it from a local shop, don't know who makes it.

 

Inge

On 9 February 2012 19:00, Carl VanWormer <[log in to unmask]> wrote:




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
<tel:%28503%29%20617-7447%20x%205163> 
Direct Line (503) 425-5163 <tel:%28503%29%20425-5163> 
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