What is the primary mechanism of an electrostatic painting process?

The primary mechanism of an electrostatic painting process is the application of a high voltage static electric charge to the paint. This method involves charging paint particles so that they are attracted to an oppositely charged substrate or object. This electrostatic attraction allows for a more even and efficient application of paint, as the charged particles are drawn to the surface, minimizing overspray and waste.

By creating a connection between the charged paint and the grounded surface, the electrostatic painting technique ensures that the paint coats uniformly and thoroughly, even in hard-to-reach areas. This results in a smoother finish and can often reduce the amount of paint needed for a given surface, thus increasing the efficiency of the process. The technique is widely used in various industries due to its effectiveness and environmental benefits.

Other options relate to different methods of paint application that don't utilize the electrostatic principles fundamental to this process.