How do Aerosol Sprays Work?
Aerosol products are a mixture of liquefied gas, propellant, solvent(s) and active ingredients that are packaged under pressure in a container with a valve. When the valve is opened, typically by pressing a button on the top of the can, the internal pressure forces the aerosol up the dip tube and out of the valve. Many aerosol products require shaking before use to completely mix the ingredients prior to spraying. Failure to do this can mean the propellant (part that helps push the ingredients out of the can) would be used first, which would then trap the remaining ingredients in the can. Role of the Solvent Choosing a solvent or solvent system that meets performance needs is not always as simple as it seems. The primary function of solvents in aerosol products is to keep the entire formulation evenly mixed to assure the proper ingredient proportions of the product are the same throughout its use. Encouraging even mixing also helps extend the life of the product, so a paint spray, for
