Diphilic bases have a soft consistency and are easily distributed over the surface of the skin and mucous membranes. Diphilic bases are divided into two groups - absorption and emulsion. Absorption bases are hydrophobic. These are anhydrous compositions of hydrophobic bases with an emulsifier (surfactant), which have the ability to incorporate the aqueous phase to form an emulsion system of the water—oil type. Their composition most often includes mixtures of petroleum jelly, petroleum jelly oil, ceresine and other hydrocarbons with emulsifiers. Surfactants, which are part of the absorption bases, usually contribute to enhancing the therapeutic activity of ointments. Absorption Diphilic bases can be divided into two groups: Diphilic bases consisting of hydrocarbons and emulsifiers (surfactants) of the water—oil type (vaseline and lanolin or wool wax...