Hello Richard, HELLO ALAIN A few things to look at: - Did you perform a solderability test on the test coupons? NO COUPONS WERE SUPPLIED. - How old are these boards? NOT ENTIRELY SURE - WE GET THEM FROM AN EXTERNAL SUPPLIER. - Did you verify plating thickness and voiding in the test coupons? NO COUPONS SUPPLIED. - are your components pre-tinned? NOT BY US. FITTED AS SUPPLIED. Alain Savard, B.Sc. Chemical Process Analyst CAE Electronics Ltd. e-mail: [log in to unmask] THANKS ALAIN, REGARDS RICHARD TILBROOK ############################################################## 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 Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################