Similar to cold-pressed juice or olive oil, cold-pressed soap is created by using a hydraulic press to extract the ingredients. Why would you want this? Glycerin, which is a moisturising agent, is a natural by-product of cold process soaps. Most soaps on the market, however, are stripped of glycerin in the formulation process, which is the reason your skin may feel squeaky clean, but also tight and itchy.
The Codex Beauty Bia Cold-Process Soap (£17), available in four variations — Uplifting, Invigorating, Balancing, and Cleansing — contains glycerin as well as olive and coconut oils and shea and cocoa butter (but is free of palm oil) to leave skin cleansed but soft and supremely hydrated.