Hello all (or what there are of us out here!), We have just completed an experiment on some PWB's that the results have me a bit puzzled. If you wrap bare boards individually in plastic bags at the manufacturer, would it make sense that trace resistance would increase? Albeit in small amounts, but a definite increase. I cannot tell you if the bags are static bags or not, which would suggest to me that they are not. Our results would seem to indicate that boards are best shipped from the manufacturer after 2 weeks in a Temperature and Humidity oven and after being exposed to oxidation. Yea, I know, what in the world is going on with the experiment process/method?? This sure seems to counter what might be considered as good logic. Then again, maybe it is time for me to learn some more 'stuff' about the care and feeding of boards!! I have open ears, or eyes in the case of email! Richard Hamilton Clemar Mfg. / Rain Bird [log in to unmask] ############################################################## 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 ##############################################################