Author Topic: Best way to remove solder mask?  (Read 2940 times)

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Offline Axtman

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Best way to remove solder mask?
« on: February 21, 2015, 02:36:00 pm »
What is the best way to remove solder mask?  I am referring to that green tinted clear coat that goes over circuit board traces.  I have some delicate traces that I need to repair and don't want to damage them further by scraping with an exacto knife.  Thanks!
 

Offline wagon

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Re: Best way to remove solder mask?
« Reply #1 on: February 21, 2015, 03:52:24 pm »
A fibreglass pencil may rub it away.
Hiding from the missus, she doesn't understand.
 

Offline Smith

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Re: Best way to remove solder mask?
« Reply #2 on: February 21, 2015, 07:25:24 pm »
I always use a sharp exacto knife or equivalent and then I just scrub it off. May not be the best option, but it works like a charm and its fast.
Trying is the first step towards failure
 

Offline Psi

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Re: Best way to remove solder mask?
« Reply #3 on: February 21, 2015, 07:27:59 pm »
Some extremely fine sandpaper would probably work ok, 1000grit maybe.
I still prefer a blade though, as long as you angle it and scrape along the surface in the correct direction it's very hard to cut tracks.

(One direction it will dig-in and cut tracks. The other direction it will only scrape based on how hard you press)
« Last Edit: February 21, 2015, 07:30:56 pm by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline KD0CAC John

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Re: Best way to remove solder mask?
« Reply #4 on: February 22, 2015, 04:12:23 am »
I 2nd the fiberglass pen , mostly used so far with the counterfeit caps leaking on traces .
After rubbing to clean copper , wipe with alcohol and re-coat where needed .   
 

Offline plazma

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Re: Best way to remove solder mask?
« Reply #5 on: February 22, 2015, 04:53:19 am »
Fiberglass pen for larger areas. Surgical knife with blade #15 for precise small areas.
 

Offline wagon

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Re: Best way to remove solder mask?
« Reply #6 on: February 22, 2015, 10:14:48 am »
I usually use a round-edged blade to do the initial prepwork ie. bare copper, then the fibreglass pencil to prepare the tracks for tinning.  It gives a much better finish.
Hiding from the missus, she doesn't understand.
 

Offline krivx

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