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isopropanol question
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Lucky-Luka:
Hi all
I've read that isopropanol is a good choice to clean up the board after the soldering is done.
I've tried it with my second ever pcb.
The result wasn't satisfying at all.
After I brushed some 99.9% isopropanol on the back of the board a sticky white patina formed.
I've tried to clean the mess using a polishing cloth.
The result is in the picture.
I'm not satisfyied at all.
What's the problem?
Cheers
frozenfrogz:
ISO-propanol is not a magic formula. It simply acts as a solvent for the flux and needs to be thoroughly washed away.
I usually take two plastic containers - one to pre wash and one to apply fresh ISO-propanol. Also I like using some tissue to cover the whole PCB and then add the solvent.

The residue you are seeing is simply that: residue.

Propanol is not going to dissolve flux. It is like washing your hands with soap. You still need to scrub and rinse. ;)

Edit:
Lucky-Luka:
So, do I have to apply isopropanol multiple times to get rid of that mess?
I mean first time I brush with isopropanol then I clean the board using a cloth then I rinse with isopropanol again and polish the board using a cloth?

p.s. I've seen the video right now. Very useful. Thanks
ptricks:
I use a tooth brush and alcohol to clean up flux.
Flux is sticky stuff so if you use a cloth or anything with fibers to wipe any residue you can leave fibers that also give it a bad appearance.
Lucky-Luka:
so what do you use? only a toothbrush?
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