From: pcdhSpamMeSenseless@electrooptical.net   
      
   On 02/08/2018 10:10 AM, Ralph Mowery wrote:   
   > In article <8e42efb2-389d-4edb-b939-fe05e5cc164b@googlegroups.com>,   
   > bruce2bowser@gmail.com says...   
   >>   >   
   >>>>> AFAIK: all PCB fluxes have to be water soluble since ozone layer   
   >>>>> legislation banned the cleaning solvents - might be worth seeking out   
   >>>>> which one is strong enough.   
   >>>>   
   >>>> Umm, no.  Leaded processes with rosin flux and solvent clean are readily   
   >>>> available, at least over here.  I use them exclusively.   
   >>>   
   >>> Hey you should walk on the wild side sometimes.  Water based flux is fine   
   >>> for low impedance stuff. (~<1 Meg ohm).  It's fast and cleans up nicely.   
   >>>   
   >>> What do you use to clean off rosin?   
   >>   
   >> Alcohol won't work?   
   >>   
   >>   
   >   
   > I use Alcohol to remove the flux.  Usually 91 % is the most you can find   
   > locally, but I usually order some 99% to do the cleaning with.   
   >   
   > Most often for the SMD and PC work I try touse some of the no clean   
   > flux, but clean it with Alcohol anyway.   
   >   
   >   
      
   Drugstore rubbing alcohol is a disaster for high-Z circuits.  When   
   (rarely) I need to clean off flux, I use the same solvent I use for   
   cleaning optics, namely HPLC grade methanol.  It's expensive, but a   
   two-litre bottle lasts me a long time.   
      
   Cheers   
      
   Phil Hobbs   
      
   --   
   Dr Philip C D Hobbs   
   Principal Consultant   
   ElectroOptical Innovations LLC / Hobbs ElectroOptics   
   Optics, Electro-optics, Photonics, Analog Electronics   
   Briarcliff Manor NY 10510   
      
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