We are seeing a condition that has seemed to become a problem in our Manufacture of PCB's. We are seeing a film or slight amount of particulate matter on some of our solder joints. It gives a dull appearance that almost looks rough. The substance is dry, and can be brushed away with a dry medium coarse brush. It seems to only adhere to low areas ie the bottom of a fillet. If an excessive amount of solder is on the joint, the joint appears shiny and smooth. We use an Aqueous cleaner (Electrovert) and a Armakleen soap solution for cleaning. We change the soap once a week and we only do a moderate to small volume business. Anyone have any ideas? Bruce Stilmack GDLS-TO Manufacturing Engineer (850) 574-4773 [log in to unmask] --------------------------------------------------- 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 -----------------------------------------------------