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Is the best PCB etchant in every kitchen ?
Its all depends on the marker you use. Normal alcohol perm. marker does not cut it. The vinegar and hydrogen peroxide will lift it. Paint base one is ok. Also, since it took longer to etch, you get "undercut" on tracks. While FeCl is messy, it does it quick (need a 50C heated bath) and if you add Citrus Acid to it, it will not create settlement and stays as a liquid. I found vinegar and hydrogen peroxide a bit of hit'n'miss, more miss than hit! You can't quite get the mix right and it take ages to etch, hence "undercut" on tracks. - Much to do about nothing
Thankyou for sharing info, didnt knew about paint/alcohal ink.I have managed to work with toner transfer > hot salt water electrolysis with 12v battery > vinegar/peroxide to remove remaining copper dust. - ArifSae
The vinegar and hydrogen peroxide worked for me! I had a good PCB in 15 minutes. Works like a charm. If it doesn't work for you, go back and read the instructable. :D
I believe you may have the proportions represented incorrectly. The balanced equation for the reaction is:4(CH3C00H) + 2(H2O2) + Cu2 = 2(Cu(CH3COO)2 + 4(H2O)This means that we consume twice as much acetic acid as we do peroxide. You have written it the other way around in your text.I have not (yet) tried this method myself, but if you have written it backwards that could explain why so many people did not have much success with the approach.
Hi!I am coming for a different lobby. I made a very nice knife out of bronze. I tried several way to etch a few words into that knife. First I cut out the words from a Sticker and sticked it on so that the letters a bare. My question is the mixture I need to make now.I have 30% Hydrogenperoxide, 5% Vinegar and Salt. Which ratio would be a save one to try?What do you do with te remaining fluid?
I am currently trying this out. Its outside and bubbling away. But it is taking quite a long time. Still the bath is turning green. I am taking that as a good sign.
Has anyone tried this by using a stainless electrode and reverse electroplating the copper off the board with an old computer power supply? - kayg9
I read an article about a Brit that paints his traces with a tar paint that holds up to a hydrochloric acid etchant. - kayg9
Thanks for the Run through on this... I will be using the Ferric Chloride solution - I picked up a bottle today at Radio Shack. I think the sponge version is the way I will be going...Tim - versonova
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