Homemade Soap #3 5 cups coldwater Add: 1 can lye When lukewarm, add: 1/2 cup borax 1/2 cup ammonia Stir thoroughly. Then add 25 cents worth of sassafras oil. Stir in 11 cups of lukewarm fat and keep stirring for 10 minutes until mixture resembles thick butterscotch. Pour into container; allow to harden 36 hours. Cut into bars.