Which parameter must be controlled in a paint booth for optimal application?

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Controlling the booth environment focuses on three interrelated factors: pressure, air velocity, and temperature. Maintaining a slightly positive booth pressure keeps dust and contaminants from being drawn in and helps prevent solvent fumes from leaking into adjacent areas. Appropriate air velocity ensures a steady, clean flow that carries atomized paint toward the substrate and away from surfaces where dust could settle, producing a smoother finish. Temperature directly affects paint flow and drying time; the right temperature keeps the paint at an optimal viscosity for atomization and a consistent flash-off rate, reducing defects like runs or orange peel. Humidity and Lighting matter for visibility and curing conditions, but they don’t govern the spray process itself as directly as pressure, velocity, and temperature. Noise, vibration, and floor cleanliness influence safety and overall shop condition, but they don’t determine the quality of the applied finish in the booth.