Hi Phil I was going to respond with a funny to your question, but then discovered some interesting, but probably useless, information: You could ask that the boards are "Scrupulously" cleaned. If you look up scrupulously - derived from scrupulous is: 2 - historical a unit of weight equal to 20 grains, used by apothecaries.• archaic a very small amount of something, esp. a quality. ORIGIN late Middle English : from French scrupule or Latin scrupulus, from scrupus, literally ‘rough pebble. GRAIN: the smallest unit of weight in the troy and avoirdupois systems, equal to 1/5760 of a pound troy and 1/7000 of a pound avoirdupois (approximately 0.0648 grams). [ORIGIN: because originally the weight was equivalent to that of a grain of wheat.] Hmmm maybe the ancients knew more than we thought.....and my funny is more useful than I thought!? However, and on a more serious note, I have had some very interesting results from running the latest SIR test method on unassembled boards for a couple of customers. In most instances we found that the boards would contribute far more failure than might be found from the assembly process residues. I did make a presentation to the SIR TG meeting in Schaumberg on this topic. If you or anyone would like a copy ask me off-line and give me your mailing address - cos the file is around 60mb. Kindest regards Graham Naisbitt [log in to unmask] www.gen3systems.com Phone: +44 (0)12 5252 1500 Mobile: +44 (0) 79 6858 2121 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 847-615-7100 ext.2815 -----------------------------------------------------