Regular aqueous or solvent cleaning is a process of dilution and removal,  
while saponification was designed as a process where the saponifier reacts  
(chemically) with the flux residue to convert it into a more easily rinsed away  
residue. At least, that's the idea. 
The rate or speed of chemical reactions depend on the concentrations of the  
two reactants, and the number of fruitful collisions between the reactants. As 
 the concentration of reactants drops, the overall reaction rate drops. At 
this  point, the operator can either increase the concentration of saponifier or 
slow  down the line speed to maintain the desired reaction rate - or in this 
case-  cleaning rate. 
This process control depends on being able to continually monitor the  
concentrations and add saponifier to maintain the desired level. If this  option is 
not available, then run the process with an overwhelming level of  saponifier 
present, so flux residue becomes a minor contaminant and saponifier  becomes a 
major soil on the assembly surface. This happens when our cleaning  equipment 
is set up to run at a fixed speed to keep pace with the other  production in 
the factory.  

Bill  Kenyon
Global Centre Consulting
3336 Birmingham Drive
Fort Collins, CO  80526
Tel: 970.207.9586   Cell:  970.980.6373




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