In all of the following formulas, this procedure was used. Blend oils and adjust specific gravity to the level indicated. rub oil mix and gum, and add 5 gal of water. Stir to mix well and run the mixture through a colloid mill or homogenizer to get a uniform oil dispersion. Dissolve the colors and propylene glycol or glycerine in water before adding them to the base emulsion. Add sufficient water to make 25 gal total volume. Pass mixture through a colloid mill or homogenizer to get an emulsion of 2-micron particle size.
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