Excess overspray is most likely caused by what condition?

• A. Air pressure too high
• B. Insufficient ventilation
• C. Incorrect spray angle
• D. Low paint viscosity

Answer: (A)

Excess overspray comes from how the paint is broken into droplets and how those droplets are driven by the spray air. When the spray air pressure is too high, atomization becomes very aggressive, producing extremely fine droplets and a wider, faster spray that can push paint past the target area. Those tiny droplets are easily carried by any air movement in the booth and can drift onto unintended surfaces, creating more overspray and a broader spray pattern. Ventilation affects how well mist is captured and removed, but it doesn’t by itself cause more overspray. An incorrect spray angle changes the shape of the pattern but not the amount of overspray, and low paint viscosity alters flow and film formation rather than the drift of droplets.