A general formula for a felt weighing 800 lb. is to dissolve 12-20 lb. of white caustic in 50 gal. of water and then add 0.5 pint to a pint of 100% synthetic non-ionic detergent such as "Igepal," which is about a 5% solution. The amount of "Igepal" used is dependent upon the particular problem at hand because it is pretty potent and can cause foam problems in higher concentrations.
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