Marvin Unless you have a clue as to what the contaminant is, it may be quite difficult to actually measure. A practical detection test would be to coat a sample with a lacquer using a similar resin base to your adhesive and put it in the steam zone of a pressure cooker for a few hours. If it vesicates, then you have problems. This way, you can determine which cleaning method removes the contaminant best. If it is a silicone, you may find there is little which will be sure of 100% removal. Brian "marvin v. picardal" wrote: > Dear Techneters, > > I would like to ask some help as to how to detect contamination > on metal surface and how to detect what kind of contamination that is. > The said contamination results to poor adhesion between the glue and > the metal surface. > > Thank you very much. Hope you would take time in helping me out with this. > > Marvin > > ############################################################## > 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 > ############################################################## ############################################################## 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 ##############################################################