Castile soap is a natural soap made of vegetable oil (traditionally olive oil) rather than synthetic substances. Since it lacks the chemical ingredients often found in conventional soaps, castile soap is not only better for skin but also better for the environment as it is much more biodegradable. Those who prefer to lessen their carbon footprint use castile soap for skin and hair care as well as household cleaning (surface cleaner, laundry, dish soap). Liquid castile soap is thin and runny, but you can thicken it if you desire.
Use a measuring cup to measure 1 cup (8 oz.) of the liquid castile soap of your choice, then pour the soap into the mixing bowl.
Use the measuring cup to measure 1/2 cup (4 oz.) of common table salt. Add the salt to the mixing bowl with the castile soap.
Stir the liquid castile soap and the common table salt with a spoon or other stirring utensil to combine the ingredients. The castile soap mixture will begin to thicken.
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Carefully pour the thickened mixture into a clean bottle or pump dispenser, using a funnel if desired.
Use thickened castile soap mixture as desired.
1/2 cup of common table salt will greatly increase viscosity of the liquid castile soap, but if after adding 1/2 cup salt, the castile soap is still not as thick as you want, add a teaspoonful more common table salt at a time and stir into the mixture until the desired thickness is achieved.
Take your time and thoroughly combine the salt and castile soap, since this will ensure proper thickening and give you a smooth, textured soap after the salt dissolves. A fork works well in place of a spoon for combining ingredients. Keep paper towels or dish towels on hand for minor spills.