Aerosol cans contain substances that
are kept in a container under pressure and are released as a fine spray when a
button is pressed
“Canisters filled with insecticide and
propellants were used to protect U.S. servicemen from insects carrying diseases
such as malaria. Shortly after the war, Robert Abplanalp, founder of Precision
Valve Corporation (PVC), invented the first mass-produced aerosol valve.
