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[SOLVED] How to remove ink from the reverse side of a PCB

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argix

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Hi to everyone,

I have a simple question.Recently I bought an electronic kit which has printed on the PCB
the positions of the electronic components(resistors,diodes etc)on the reverse side of the copper circuit.I think it's a kind of ink.
Does anyone know how to remove this ink from the surface?

Thanks.
 

Re: Question about a PCB

Why do you want to remove it? It is supposed to be there.

Keith
 

Re: Question about a PCB

You could use a metal bruch to remove it .
 

Re: Question about a PCB

As Keith said, it is supposed to be there. But if you want to remove it use some kind of solvents (heat it so that the ink peels off or solvents like Acetone or nitro if it is a laser ink)...
 

Re: Question about a PCB

A typical PCB screen printing ink is a based on two-component epoxy resin. It can't be easily removed with solvents after curing. Or in other words, compounds that can solubelize it are also attacking the FR4 substrate. I guess, you won't want that.
 

Re: Question about a PCB

I'd like to thank everyone for your answers.
I ordered a number of kits from an australian site.Normally the pcb's should be made from vacelite as it is shown on the pics of the site but instead they're glassepoxy.These kits are for educational reasons,so the exact place of every component wont help the students think and understand the whole procedure.I will try to use a disolvent and if it doesnt work I'll leave it as it is.
 

Re: Question about a PCB

Hi!

For specific educational purposes there's much to be said for the OP's approach! I found that something called "Mota-Kleans" which comes in an aerosol tin will dissolve silk-screen ink - it also melts plastics wholesale as I found out when I tried to clean a ghetto-blaster with it!

I'm not sure what it's constituted of but it's sold for dissolving oil and grase etc., on motor vehicle engine components.

Chris Williams
 

Re: Question about a PCB

Try sanding it with 120 grit sandpaper if that works then use 180 or 220 grit so it does not make scratch marks.


Try acetone on the printing that will take the ink off, but watch the acetone dont eat the board.
 
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    argix

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Re: Question about a PCB

I tried the P280 sandpaper and it worked just fine,no signs of scratch on the surface.
 
Re: Question about a PCB

Ok
Thats super!
;-)
 

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