Stupid question here, I know shop vacs are widely used, but is there any concern for a dust explosion? I remember the printer repair man having a special vacuum cleaner for toner because of the risk of a spark and dust? Is that a concern with a shop vac (Home Depot Model)? Perhaps a special filter?
Hi Ray - As an ex-printer tech, 23 yrs at Xerox, there is very little comparison between the toner and developer encountered vacuuming up the "clean, dry, process"
. To begin with the toner was a thermoplastic, which is something of a fuel, and was about 1 micron in size. The developer was steel shot, 10 - 20 microns in size which built up a heck of static charge in the plastic hose so the chances of a static discharge were very high. Moisture level was 0 the norm. Even at that, toner explosions were extremely rare even with standard super suckers.
Sawdust, or even MDF dust, will have higher moisture levels and, as Randall pointed out, the volume of dust and oxygen at the time an ignition source is introduced is actually pretty narrow with materials that are normally considered non-flammible.
I've been away from it for about 15 years now but I am not aware of any brushless vacuums issued to the field. They may have field tested some but the resolution that was implemented when I was there was a conductive hose and a ground clip. That was as much to keep the tech from static shock as it was to prevent explosions though.