Hi Joe, We use them quite a bit for standing off axial parts, and there's a few boards that we stand off crystals, oscillators, and can transistors too. We don't use the effervescent type, never have had a problem washing the normal ones away. We clean in an Electrovert H-500 inline cleaner using straight DI water, and we have an Electrovert MCS-1000 that we use Kyzen XJN in. Both machines clean the spacers just fine, with no ill effects with either machine. We do quite a bit of conformal coating (Acrylic and Urethane), and never have had an issue because of the spacers... Hope this helps, -Steve Gregory- > Anyone had success using wash-away spacers during wave-soldering, then > removing them by aqueous cleaning? We're looking at them mostly to > control standoff of transistor cans and vertically-mounted resistors. > > Looking at the Bivar catalog, spacers come in two types, normal and > "effervescent", which dissolve more quickly. > > Do they wash away completely? Leave any residue that affects conformal > coat adhesion? Any problems with the materials reacting with the wash > chemistry, either saponifier or alcohol based? > > Joe Kane > BAE SYSTEMS Controls > Johnson City, NY > --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------