An emulsifier is used to mix two immiscible liquids. Heating or cooling requirements during emulsification, overpressure or vacuum requirements, the need for wall scrapers, design of the mixing head, the viscosity of the liquids, and the desired droplet size are all important considerations when selecting an emulsifying system. Emulsifiers are typically used in the food industry for the production of batters, creams, and sauces, in the pharmaceutical and cosmetics industry for the production of creams and lotions, and in the chemical industry for the production of paint and other emulsions.