<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">At my shop we use water clean solder and water in the ultrasonic cleaner. We rinse with deionized water, but wash with the stuff from the tap.<div class=""><br class=""></div><div class="">Mark</div><div class=""><br class=""><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 28, 2023, at 10:00 AM, Andrei Kudryavtsev via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi All, <div class="">I have PCBs with SMD and TH parts, and also with plastic connectors. SMD parts are machine soldered, TH components are manually installed. Obviously some flux residue is visible from manual soldering. </div><div class="">I have a 22L ultrasonic cleaner with a temperature control. </div><div class="">The boards are quite large, like 100x250mm or so.</div><div class="">Wondering if you can share some experience using an ultrasonic cleaner to avoid solvent based sprays and mechanical cleaning.</div><div class="">There are some threads of using IPA inside small zip lock bags to avoid evaporation, which seems to work well for small boards and is relatively safe. However it's not my option due to the board size. </div><div class="">I also see some "ultrasonic flux remover" detergents on eBay, but for some reason they are all in the UK. </div><div class="">Also I found the specialized Flux Off by Chemtronics but have never tried it. </div><div class="">Please, suggest.</div><div class=""><br class=""></div><span class="gmail_signature_prefix">-- </span><br class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="">Andrei Kudryavtsev,</div><div class=""><br class=""></div><div class="">My last album <b class="">Two Match - The 1st Fill</b><span style="font-size:12.8px" class=""> on </span><a href="http://itunes.apple.com/us/album/the-1st-fill/id1241529125" style="font-size:12.8px" target="_blank" class="">iTunes</a><span style="font-size:12.8px" class=""> </span>and <a href="https://open.spotify.com/album/4aM8DzmN5yi4ho1gcmC8ls" target="_blank" class="">Spotify</a></div><div class="">Follow me on <a href="https://www.facebook.com/andrei.kudryavtsev.5" target="_blank" class="">Facebook</a>, <a href="https://www.instagram.com/deftaudio/" target="_blank" class="">Instagram</a></div><div class=""><br class=""></div><div class="">Music technologies by </div><div class="">Deftaudio <a href="http://www.tindie.com/stores/Deftaudio" target="_blank" class="">www.tindie.com/stores/Deftaudio</a></div></div></div></div></div></div>
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