I know of one instance of with Shipley Chemistry where the chemistry failed big time... It was not Shipleys fault, by the way. Cutting to the chase... The bath was made up during a drought. The local water system was in short supply, and lakes were low. The bath was made up with DI water... however the theory is that there were organics that made it through the DI system and poisoned the bath from the start. The organics were more highly concentrated (fish urine ?) in the low lake condition. Who knows what strange chlorated, peroxided organics slipped through the DI system. Problem went away after the lakes filled back up. Perhaps this qualifies as a folk story, but you sound willing to entertain the unlikely >Subject: Electroless copper >From: [log in to unmask] at Internet >Date: 6/12/96 7:41 AM > > > We have recently changed our Electroless Chemistries and Electrolytic > Copper to Shipley product line. We have been overwhelmed with scrap for > voids, plating separations and adhesion problems. We have followed the > vendor recommendations and are running within their guidelines. We need > some technical help. The support we've been receiving is not getting us > anywhere. Currently we are shut down for all production due to scrap > levels. HELP! > > Thank you ==================================================================== George Franck PWB Product Assurance Phone (703) 560-5000 x2648 Raytheon E-Systems M/S N408 Fax (703) 280-4613 7700 Arlington Blvd E-Mail: [log in to unmask] Falls Church Va 22046 E-Mail: [log in to unmask] ====================================================================