There is many archived "tech-letters" that address the issues of "how to", "what to do", and "the theory of" SIR testing. But what can be done in practical terms in a production process situation, to address "borderline" SIR results. This with city water rinses, at both pumice preclean (prior to coat) and post HASL cleaner. HASL with the use of no-clean flux. Is there a cleaner, chemical change, etc... that has made the difference to others that may enhance our SIR results in the future? Andy McKean, PEng PCI, Toronto ############################################################## TechNet Mail List 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 web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################