I've used my new Graco Magnum 5 spray rig to paint some cottage cheese
ceilings in my house (my first try at this sort of thing), and in order to
avoid the mist from going everywhere, I've used plastic sheeting to pretty
much seal off the room I'm working in. I've noticed that the spray is dry
by the time it lands on the ground and ends up as white dust on the ground.
My question is this: With the paint as a fine airborne powder, and without
any ventilation in the room, is there any explosion risk as a result of hot
light bulbs, sparks from plugging/unplugging equipment, etc.?
When I was a kid, I once played around with flour, a folded newspaper and a
coal furnace. I blew the flour through the folded paper across the glowing
coals, and successfully removed many years of soot and dust from all the
duct work - into all the rooms upstairs. As I said, I ONCE did that.
<< as a result of hot light bulbs, sparks from plugging/unplugging equipment,
You're wise to be aware of the problem. Here in the Midwest we have had reports
for years of explosions in grain handling facilities. Paint particles have
quite high levels of inert fillers when dry, so their hazards are probably an
order of magnitude less than sawdust or grain particles. A bit of common sense
safety habits will lengthen your life span, so go for it. Enjoy the Graco. I
hear it's a neat rig.
I just called Valspar, who makes the paints I'm using, and asked if their
was any explosion risk while spraying. I was told by a service tech that
the paint is not flammable either as a wet aerosol mist or as the resulting
dry aerosol powder, and that he had never even heard that question asked
I looked on the ingredients list on the can, and after evaporation of the
water and alcohol, the only components remaining should be the titanium
dioxide pigment (non flammable), crystalline silica (non flammable) and the
acrylic resin (possibly flammable). If the acrylic resin is flammable,
because it makes up only a portion of the dry particle, the aerosol powder
is unlikely to be flammable and what the tech said makes sense.
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