September 15, 2004 Does anyone know of a method to remove fully cured LPI solder mask (IPC-SM-840, Class 3 product) from an FR-4 PWB without damaging the PWB or otherwise creating possible condition for growing dendrites? If chemicals can be used, are they non-conductive? If solder mask needs to be touched up because of missing solder mask, --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- how do folks do this?