One simple way to make liquid soap is to make a liquid solution using pure bar soap. Grind the bar soap, add boiling water to the soap, and stir thoroughly. You need a pure bar soap, a cheese grater, boiling water, a bowl, a cup and a stirring rod. The procedure takes at least one day.
- Grate the bar soap
Using a cheese grater, grate the bar soap into small particles to facilitate dissolution in water. Use the side of the grater with the smallest pores to get the finest particles.
- Dissolve the soap in hot water
Put the grated soap in a bowl, and add 3 cups of boiling water to dissolve the soap. Use the stirring rod to stir the mixture. Check to ensure that all the soap has dissolved completely.
- Allow the soap to form, and stir again
Let your solution sit for about 12 hours, then stir the solution again. Add water if the solution is very thick. After mixing, let the solution sit for another 12 hours, after which the solution is ready to use. You can add a preservative to the liquid soap if you plan to use it for more than a month.