Ramon By definition, a solvent that removes a coating is aggressive. There are many polymers used in printed circuit assemblies that may be attacked by it (including its vapours), including untreated parts of the coating that may swell slightly, weakening its structure. No one can answer whether it is deleterious to your assemblies, except yourself, and that only after minute qualification tests. I would place samples of every polymer on your assemblies in an acetone bath and in a vapour zone above acetone for, say, an hour and examine each sample under magnification for any sign of attack, swelling or stress cracking and again after repose in air for a couple of weeks. Absorption can be determined by weighing each sample before and after immersion and superficial drying in air for a few minutes (no forced drying). Hope this helps. Brian Dehoyos, Ramon wrote: > Technetters: > Does anybody know if there is any papers that indicate that acetone > is detrimental to PWAs? It is very handy in the removal of CC of small > areas during rev changes, except someone raised that question. > Thanks for all input on this matter. > Regards, > Ramon > > --------------------------------------------------- > 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 > ----------------------------------------------------- > > --------------------------------------------------- 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 -----------------------------------------------------