Dear Technetters, When processing surface mount boards we sometimes get a few miss prints and would like to clean the boards. We use a parts tank filled with mineral spirits to clean our stencils. I would like to clean our boards in the same tank and I was wondering if the mineral spirits would be detrimental to the FR-4 and CEM3 circuit boards. I'm stuck with this chemistry because of the emulsion we use on our screens. Yes we do still use/clean screens also. Thank you for any input. Rob Palson Rob Palson Red Lion Controls York, PA [log in to unmask] ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################