Cold process soap refers to a method of making soap from scratch using oils, lye (sodium hydroxide), and water. In this process, the ingredients are combined at room temperature or slightly warmer, hence the term "cold process." The mixture is then poured into molds where it undergoes a chemical reaction called saponification, which transforms the oils and lye into soap.
Cold process soap-making allows for more creativity and customization because various oils, butters, fragrances, colors, and additives can be incorporated to create unique blends. Additionally, because the soap is not heated excessively during the process, it retains the beneficial properties of the oils and other ingredients.
After pouring the soap into molds, it needs to cure for several weeks to allow excess moisture to evaporate and for the soap to harden properly. Once cured, the soap is cut into bars, and it's ready for use.
Cold process soap-making requires careful measurement and handling of lye, as it is a caustic substance. Safety precautions such as wearing protective gear and working in a well-ventilated area are essential.
