This document provides an introduction to emulsions, which are mixtures of two immiscible liquids like oil and water. It outlines the basic phases needed to create an emulsion, including water, oil, emulsifiers, thickeners, and preservatives. Specific ingredients and tools are recommended for each phase. Proper pH levels and buffers are also discussed. The document emphasizes using broad spectrum preservatives to prevent bacteria, yeast, and mold growth, especially in tropical environments. Ingredients should be listed on labels according to INCI standards.