Mixing oils and a lye water solution makes soap. Once the oils and lye are combined together, after vigorous stirring, the mixture thickens and is poured into molds. The molds are covered for 24 hours to allow the saponification process to occur. After the 24-hour period, the soap is taken out and cut into bars. The bars must cure for three to four weeks (for the entire chemical reaction to finalize) before use.