I've been making several home-made film developers and fixers from bulk dry powdered chemistry over the past year. As I spoon out and weigh the dry components in my home darkroom, I've become aware of a fine dust that gets airborne despite my best and most careful efforts not to stir up the contents; sodium sulfite in particular I can smell-almost-taste in the air as I start to take it out of the bottle. Long term continued exposure to this chemical dust is undoubtedly not a good thing. Further, I know it's settling everywhere all over my countertops and printing equipment. Cutting large holes in the walls of the house to install an elaborate ventilation system in my darkroom is not an option. I spied this in a catalog that showed up in my mailbox: a self-contained fume extraction system. http://www.hakkousa.com/detail.asp?CID=52&PID=4878&Page=1 I really liked the rigid self supporting hose that could be positioned over the project to suck up any airborne particulates right at the source. It's perfect except for the price. The system is meant for heavy electronics soldering with the related acids and smoke, but it gave me an idea--I don't need the fume/vapor part of it, just the dust part. What about something like a small Shop-Vac with their very best HEPA filter bag and cartridge? I could make something to hold a hose and large nozzle over the bottles of dry chemistry, and turn it on when I'm measuring out the powder for a formula. What do you APUGers think?