| Electronics > Beginners |
| 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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