Hi Ron -
     
     May I offer a different approach? Instead of switching to a different 
     low residue flux (a VOC free material) how about controlling the VOCs! 
     We are very happy with our current flux materials and so have 
     investigated the use of spray fluxing instead of our current 
     application method (wave fluxer). With the spray fluxer we can apply 
     only the amount of flux we need to for successful soldering and 
     control the quantity of flux volatiles that escape. We have taken the 
     approach (where possible) that instead of trying to eliminate 
     materials that we know add benefit to the process but are regulated, 
     trying to control and use those materials in an educated manner. I 
     have tried the water based VOC materials and they sizzle like bacon! 
     Nothing against those types of materials but I am just not ready to do 
     the characterization it will take to implement them in the existing 
     processes (culture/technology learning curve impact). Have fun.
     
     
     Dave Hillman
     Rockwell Collins
     [log in to unmask]


______________________________ Reply Separator _________________________________
Subject: Assy:  Water Based VOC Flux
Author:  [log in to unmask] at ccmgw1
Date:    2/20/97 11:11 AM


     Good Day Forum:
     This survey Ron again.  As many of you on the forum have now figured, 
     we are in a transition period to a No-clean/Low-Residue Soldering 
     Solution.  Initial evaluations have pointed toward implementing a 
     water based, VOC free, flux.  The flux we tested was Kester's 973 
     flux.  Looking down the road, it would seem that environmentalists 
     will eventually ask for further reductions in VOCs.  
     
     The question for the forum is "How many of you wave solderers are 
     using a water based VOC free (No-clean/Low-Residue) flux in your wave 
     soldering processes?"
     
     If you would like to share your satisfaction with the results of this 
     flux I would appreciate it very much.
     
     We are looking at convection heating to eliminate moisture and have 
     had excellent results (solderballing/spattering ...etc...).
     
     Thanks in advance for your help.
     
     Ron Hollandsworth
     [log in to unmask]
     ITT A/CD
     
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