Nice to see you again, Bev. As you are now a company head I thought you said adieu to TechNet for good. Ingemar Hernefjord Subject: Re: [TN] process control of final cleanliness in a no-clean world Wade, Further to what Doug wrote, you can also correlate cleanliness tester readings to what you "normally" (or otherwise ;( ) see on your boards. In the early 90's, while I was with Nortel Networks, through a two-lab test program we found that most circuit packs manufactured with wave or foam fluxers and no-clean fluxes gave values of 2.5 to 4.5 SOD for a particular brand of cleanliness tester. 6-8 we took as yellow light and above 10 as a red light situation - the board probably took a bath in a flux wave and you usually had flux residues in your edge connectors - not a good scenario. Pretty seat-of-the -pants, but better than nothing. Bev Christian XLTEK -- ############################################################## 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. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################