Hello All, I am posting this on behalf of my friend. I have seen lot of Dross formation every time I power ON the Wave soldering machine. Though I use dross reducing powder, still lot of dross gets formed. What are all the Major factors affecting this ? If it is Solder impurities , what are those ? How do I control this Excessive dross formation ? { Every time I need to add lots of fresh solder bar to maintain the solder level in the solde bath. ) thanks in advance amith ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################