Hello Technetters, I've been asked to forward this inquiry for a contract assembly person we deal with occasionally. His problem is that he has to adjust his wave solder parameters (more or less preheat??) when changing between "very shiny" and "very dull" solder mask on the same part number. He would like some collaboration of this phenomena to help justify requiring his supplier to keep all the mask the same. Thanks, Robert E. Welch Process Specialist Email: [log in to unmask] Modem: 804-239-9120 Fax: 804-237-3048 ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################