amith, There was a very good article on dross in the October 1998 issue of SMT written by Ralph Woodgate. I think this would answer many of your questions. Ken Bloomquist PRIMEX Aerospace Company www.primextech.com At 08:04 PM 11/3/98 PST, you wrote: >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 >################################################################ > > > ################################################################ 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 ################################################################