Section 783 in Rules under the United Provinces Excise Act, 1910
783.
The third kind of denatured spirit to be used in the manufacture of transparent soap only shall contain one part of castor oil and 0.5 part of caustic soda solution in 100 parts of spirit, all by volume. The caustic soda solution is to be prepared by dissolving one part of solid caustic soda of 98.99 per cent (NaOH) in 3 parts of water. Take the castor oil, add to it 1-½ times its volume of alcohol while stirring and finally add the soda solution. A clear solution will be obtained which is to be added to the bulk of the alcohol.
