So I decided to give the advice on this site a try and clean my PCB with oxalic acid, I chose Bar Keepers fiend since that is what I had. My question is how to know when it is clean.
No matter how much I scrub I get black that comes up on the paper towels I am using. I assume this is the oxalic acid reacting with the copper or is it still oxidation residue?
BTW I also get debris coming off the board using the scotch brite pad. Is this also copper?
How do you know when the board is really clean?
No matter how much I scrub I get black that comes up on the paper towels I am using. I assume this is the oxalic acid reacting with the copper or is it still oxidation residue?
BTW I also get debris coming off the board using the scotch brite pad. Is this also copper?
How do you know when the board is really clean?