There are specialty no-clean flux formulas avail that leave a bit of clear residue around the joint.
If you want to use just water (no solvent), there are also washable fluxes avail. I've had the same white residue problem with some rosin based fluxes (especially those that are paste or tacky gel based). Never really got it all off with IPA. I ended up using a small ultrasonic cleaner with a naptha bath. Might not be the best solvent, but it gets it all off. I don't think it'll be a good idea too if you have some kinda transducer or something that's open and mounted on the pcb. Sent via BlackBerry -----Original Message----- From: Sean Voisen <[email protected]> Sender: [email protected] Date: Sun, 15 Jan 2012 13:50:13 To: <[email protected]> Reply-To: [email protected] Subject: [neonixie-l] Cleaning PCBs Hello all, Not exactly 100% on-topic, but I'm curious if those of you building clocks on PCBs are cleaning your boards after soldering, and if so what you're using to do so. I've been using 91% isopropyl alcohol and an old stiff toothbrush with mixed results. Mostly - especially with so-called "no clean" flux - it leaves a white residue that I then I have to wash off with running or distilled water. It works, but it's a slow and imperfect process. I'd like something better. Perhaps I need to try to find 99% IPA (not sure it will make much difference) or change flux ... Cheers, Sean -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
