Control of paint overspray in autobody repair shops.
Heitbrink-WA; Wallace-ME; Bryant-CJ; Ruch-WE
Am Ind Hyg Assoc J 1995 Oct; 56(10):1023-1032
Evaluations of commercially available equipment for controlling worker exposures to paint overspray were conducted in six autobody repair shops and in one spray painting equipment manufacturer's test facility. Most spray painting was done in booths, and workers used full facepiece or half facepiece air purifying respirators or air hoods. Particulate overspray concentration, supply and exhaust air flow volumes, real time exposures, and respirator filters were evaluated. Downdraft booths resulted in lower paint overspray concentrations than crossdraft booths. Downdraft booths allowed the energy of the jet gun to be dissipated so that the overspray moved away from the worker and was exhausted from the booth before it could mix with the incoming air. A high volume/low pressure (HVLP) gun reduced particulate overspray by half, and increased by 30% the ratio of paint film thickness to mass of paint applied. Most respirators were in poor shape with deformed facepieces and respirator straps. The authors conclude that formal programs involving training and maintenance are needed to ensure that all equipment operates properly. Currently available spray painting booths do not completely control worker exposure to paint overspray. Exposure can by minimized by using HVLP spray painting guns and downdraft spray painting booths.
NIOSH-Author; Paint-spraying; Paint-shops; Spray-painting; Automobile-repair-shops; Painters; Occupational-exposure; Industrial-hygiene; Workplace-studies; Control-technology
American Industrial Hygiene Association Journal