Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!husc6!ogccse!blake!uw-beaver!fluke!strong
From: strong@tc.fluke.COM (Norm Strong)
Newsgroups: sci.electronics
Subject: Re: Rosin remover
Message-ID: <10118@fluke.COM>
Date: 4 Aug 89 15:00:27 GMT
References: <1254.AA1254@americ> <134@paldn.UUCP>
Sender: news@tc.fluke.COM
Distribution: usa
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Lines: 22

In article <134@paldn.UUCP> pwilcox@paldn.UUCP (Peter McLeod Wilcox) writes:
}In article <1254.AA1254@americ>, erk@americ.UUCP (Erick Parsons) writes:
}> >From: paulc@boulder.Colorado.EDU (Paul Connally) Message-ID: <10167@boulder.Colorado.EDU>
}> >	Anybody know of a good solvent to clean rosin from PCB's?
}> Naptha works pretty good barring the health hazards that it poses. 
}> Can someone tell us, Is it a Carcinogen ? Flammable ?
}
}Naptha is flamable (very), but I don't think it is Carcinogenic - don't
}really know however.  Most comercial PCB cleaners use either a pure CFC
}(Hydrocarbon with some or all of the hydrogen replaced by Clorine or Florine,
}also known as ozone depletion gas :-), or one mixed with alcohols.  Naptha
}I would think would have the potential for destroying some plastic components
}like relays and switches.  And, if you get a spark, you are asking for one hell
}of an explosion!  Radio Shack sells a CFC/Alcohol cleaner in a spray can
}which works very well, non-toxic, and non-flammable.

The very best way to remove rosin flux is to write to the manufacturer of
the solder and ask for their recommendation.  You'd be surprised how much
they know about removing their own flux.  :-)
-- 

Norm   (strong@tc.fluke.com)