Read the soaping safely page, if you haven´t already Dissolve NaOH in water by slowly adding the NaOH to the water and stirring gently with the spoon. Leave the mixture, now called lye, to cool down
Melt tallow beef and mix it with castor oil
Wait until the lye is between 86 and 104 degrees F (20-40 degrees C) and heat up the oils to approx the same temperature if needed
Mix the fat phase and the lye by slowly pouring it into the lye
Use a stick blender for 1-5 minutes until trace
Pour your batter into a mold or molds as you prefer
Check if the soap is firm enough to cut after 24 hours
Cut the soap bars (if you used a big mold) and trim the edges
Leave to cure e.g. in a paper bag for 4 - 6 weeks and check pH. Store it by room temperature
