Hi Leland, If the post-solder residues can safely be left on the board a solder paste may already be referred to as "no-clean", in spite of the fact that many users still want to clean it because of improved pin-testability, conformal coating or esthetics. It is not uncommon that the same brochures that present a solderpaste as "no-clean" include a list of compatible cleaning chemistries, which you can use as a starting-point for your investigattions. If your solderpaste is designed as a "no-clean-only" then you're in trouble, and you should consider changing the complete process including the paste. Daan Terstegge SMT Centre Thales Communications Unclassified mail Personal Website: http://www.smtinfo.net >>> Leland Woodall <[log in to unmask]> 05/08 9:41 pm >>> Folks, We've been asked to investigate the pros and cons of performing an aqueous wash of our no-clean assemblies prior to them receiving an acrylic conformal coating. Our management team wants the product to be absolutely free from any type of contamination. Has anyone had any experience with this? What are the possible advantages and some of the pitfalls we could anticipate? Are there any knowledge sources that you might be able to recommend? Any assistance would be sincerely appreciated. Regards, Leland Woodall Quality Coordinator Keihin Carolina System Technology, Inc. 4047 McNair Road Tarboro, NC 27886 Phone: 252-212-1565, ext. 2865 --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------