over-spray is a mist produced when coatings are atomized through the
nozzle of a spray gun. This mist can consist of solvent fumes, isocyanates,
heavy metals such as lead and chrome from pigments, and other chemicals
found in coating products. Exposure to these materials can result
in nervous disorders, skin and eye irritation, respiratory sensitization,
difficulty with breathing, and reduced lung function.
paint overspray can spoil a paint job, and prematurely clog paint
booth filters, reducing your productivity and increasing your costs.
Effective control of worker exposure to paint overspray requires
the proper selection of spray painting equipment, a properly designed
and ventilated spray painting booth, and personal protective equipment.
Formal training and maintenance programs will help ensure that all
equipment operates properly. Three types of control are recommended
* SPRAY PAINTING GUNS
HIGH VOLUME, LOW PRESSURE (HVLP) spray painting guns are recommended
instead of conventional gravity or siphon-feed spray painting guns
because HVLP guns cut paint overspray concentrations in half. HVLP
and LVLP guns transfer paint more efficiently and can reduce paint
* PAINT BOOTH
DOWNDRAFT VENTILATION spray painting booths are recommended instead
of Crossdraft or Semi-Downdraft Ventilation spray painting booths.
Properly operated DOWNDRAFT booths produce lower concentrations
of paint overspray compared to the other two types of booths. DOWNDRAFT
booths produce a cleaner paint job that requires less buffing.
Properly used and maintained HVLP spray painting guns or LVLP and
downdraft booths will greatly reduce paint overspray concentrations,
but they will not completely eliminate overspray from the air workers
breathe. Therefore, PERSONAL RESPIRATORY PROTECTIVE EQUIPMENT is
strongly recommended and a RESPIRATORY PROTECTION PROGRAM that contains
all elements required by provincial health and safety regulations
or standards (such as worker evaluation, selection of appropriate
air-purifying or supplied-air respirators, fit-testing, training,
and maintenance) will be needed to fully protect workers from this
Institute for Occupational Safety and Health)
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