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11:22 1996
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     Sometimes the cause is the CC is too thick and does not allow the 
     gaseous products to get out. Try thinning the CC.


______________________________ Reply Separator _________________________________
Subject: Bubbles in Conformal Coating
Author:  [log in to unmask] at Internet
Date:    11/7/96 5:06 PM


     I threw this question out once before but I still cannot determine the 
     source of bubbles in our conformal coating process.  We are using an 
     acrylic coating and a Nordson Select Coat System.   The bubbles come 
     and go from day to day.  
     
     We have looked at viscosity, temperature, humidity, pressure, 
     z-height, contamination, micro-adjust, and a few other variables. Has 
     anyone else seen this phenomenon or do you have any insight on it?  
     
     Any help is very much appreciated.
     
     Thank you.  
     
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