Aerosol spray

Aerosol spray is the name given to a type of canister containing liquid under pressure from pressurized vapor in equilibrium with another liquid, which often also dissolves the payload (see propellant below). When the can's valve is opened, the liquid is forced out of a small hole and emerges as an aerosol, or mist. As gas expands to drive out the payload, some propellant evaporates inside the can to maintain an even pressure. Outside the can, the droplets of propellant evaporate rapidly, leaving the payload suspended as very fine particles or droplets. Typical liquids dispensed in this way are insecticides, deodorants and paints. An atomiser is a similar device that is pressurised by a hand-operated pump rather than by stored gas.

Related Topics:
Aerosol - Mist - Insecticide - Deodorant - Paint - Atomiser

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The modern aerosol spray can was invented in 1926 by Erik Rotheim, a Norwegian engineer. Yet only in 1941 the Americans Lyle Goodhue and William Sullivan turned it into a useful device, used by military to spray the malaria mosquito during World War II.

Related Topics:
1926 - Erik Rotheim - Norwegian - 1941 - Americans - Malaria

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