Definition of Vanishing Cream:
Vanishing creams are oil-in-water (O/W) emulsions that leave a non-greasy, matte finish on the skin.
The name “vanishing cream” comes from their fast absorption and the absence of a shiny residue.
Key Ingredients:
Fatty Acids: Provide a smooth texture (e.g., stearic acid).
Water: Continuous phase.
Emulsifiers: Ensure stability (e.g., triethanolamine).
Preservatives and Fragrance.
Formulation and Preparation
Oil Phase Preparation
Stearic acid, emulsifiers (partially), and fatty alcohols (if used) are heated together.
Aqueous Phase Preparation
Water and other water-soluble ingredients (e.g., humectants, neutralizing agents) are heated separately.
Neutralization and Emulsification
The heated aqueous phase is added to the oil phase under stirring, which neutralizes stearic acid and forms an O/W emulsion.
Cooling
The mixture is stirred gently and cooled.
Perfume and heat-sensitive additives are added once the emulsion is below 40 °C.
Finishing
The cream is tested for pH (around 6–7), viscosity, and stability before being packaged into jars or tubes.