Dirty blank pcb board

Frequently asked question on the subject of designing, creating, producing printed boards, veroboards or perfboads and on point-to-point construction techniques.
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kin0
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Post by kin0 »

Hay,
My dad bought me a blank pcb board and I wanted to make a pcb (first time) the problem is that it is real dirty. It also have some scratches on it. Here is some pics. If any one can give me an idea how to clean it. I tried with spirit, water and soap but nothing worked.
Oh and should I clean both sides or only the one which I transfer to?
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madbean

Post by madbean »

It's easy: use some 00 steel wool and polish it down (you can also use scotchbrite or fine sandpaper). First polish one direction, then the other. Repeat until it starts to shine up. Then clean thoroughly with Acetone (very important).

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Post by RnFR »

I also caught a trick from an old ham dog that I have yet to try- lime away. I guess you spray it on and let it soak. Apparently, the corrossion comes right off.
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lolbou
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Post by lolbou »

I would have tried some chorhydric acid (lightly diluted) to get rid of oxidized copper. Also check these scratches to be sure that the continuity is good...
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Duckman
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Post by Duckman »

:!: Your copper foil is very thiny, so be careful when you use abrasive methods :!:

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Post by rocklander »

I live in rotorua where sulphur often covers copper like this.. I just use isopropyl alcohol and a green scotch brite style scourer pad...
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kin0
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Post by kin0 »

Okay, I cleaned it and it's pretty clean except a few stains (I think they are from water) that won't get off even then I used spirit. Any ideas?

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Post by RnFR »

Time for the green scouring pad, then lots of rubbing alcohol.
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DrNomis
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Post by DrNomis »

I just use a scouring pad as used to wash dishes,with some soapy water,rub the copper side of the PCB material with the scouring pad dipped in soapy water,keep going till the board is shiney,then rinse the board under a tap,then dry with paper toweling,I use toilet paper,it works a treat,once your circuit board is dry,put your artwork on the copper side,holding it in place with masking tape,and then use your usual method to transfer the artwork to the copper.... :)
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