Load part A into mixing vessel. Start agitation. Mix until uniform. Load part B into agitated mixing vessel. Mix for a minimum of 10-15 minutes. Load DOW CORNING 531 and 536 Fluids. Mix until a uniform, water-in-oil emulsion is formed. This normally takes between 2 to 5 minutes. A simple procedure can be used to identify when a water-in-oil emulsion is formed. Place a few drops of the formulation into a container of water. When a water-in-oil emulsion is formed, it will not disperse in water. After the emulsion has formed, load the solution of sodium citrate and water. (Sodium citrate improves freeze-thaw stability). Load the Tween 20. Mix until uniform. Final process through a high shear mixing operation (i.e. colloid mill, homogenizer, hydroshear (Gaulin Corp.). Cowles Mixer or recirculate through a high shear auger or centrifugal pump). Final consistency will be dependent upon the shear applied to the formulation during this step.
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