Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· Air spraying - air under pressure causes the paint to atomize and be propelled to the article to be painted
· Airless spraying - finishing materials, such as paint, are sprayed under considerable hydraulic pressure through a fixed orifice, which causes the paint to be atomized directly without the need for air.
· Electrostatic spraying - Atomized particles (paint or powder droplets) are electrostatically charged. These are attracted to the object being sprayed by the applied electrostatic field. Considerable material savings are achieved since very little of the sprayed material bypasses the object and is lost. Objects being sprayed are kept at a ground potential to achieve a large electrostatic field.
· Heating of materials - paint decreases in viscosity when heated and can be sprayed with lower pressures. Less solvent is required and there is less overspray of paint. Heating may be used with any of the preceding systems
· Air spraying and electrostatic spraying are the most common methods of application for paints, enamels, powders, and sound absorbing coatings.