Abstract: An improved water-wash spray booth of the type in which exhaust air lifts liquid from a reservoir to a trough and such lifted liquid flows from the trough over a floodsheet back to the reservoir. An open top chamber is positioned immediately below the liquid surface within the reservoir and is connected at its bottom to a conduit which discharges into the reservoir at a location spaced from the chamber. A flow of liquid from the trough above the floodsheet induces a turbulent flow of liquid from the surface of the reservoir downwardly through the chamber and out the conduit for breaking up paint particles into smaller particles.

Abstract: Electrostatic deposition of air atomized liquid coating materials by adjusting the conductivity of the coating material and the voltage applied thereto so that virtually no air ionization occurs. Thus, essentially all of the current reaching the object to be coated is carried by the sprayed material thus minimizing the charge build-up on the subject, and eliminating charge accumulation on ungrounded objects out of the spray zone.