Water-in—oil (W/O) emulsifiers

From the dermatological point of view, W/O emulsions are preferable to O/W emulsions. The natural lipid fiIm on the skin is also a W/O emulsion. W/0 emulsions can improve the hydration of the skin and are an ideal base for lipid-soluble active ingredients. A problematic point is that they usually leave a ‘fatty-feeling’ on the skin, and this is not particularly appreciated by customers.
Another problem can be ‘oiling-off’ or separation of the oil phase on storage. Viscosity a ad stability are extremely process sensitive.