I’ve been wanting do some slip casting for ceramics for a while, so I’ll have to be working with dry plaster and dry clay slip indoors.
Slip casting is a really really cool process - It involves pouring liquid clay (slip) into a plaster mold. The plaster removes water from the liquid, causing slip to solidify at the interface. After you have the thickness you need, the slip can be poured out, and the mold removed leaving a clay positive of the plaster negative. The workflow once you have liquid slip and plaster molds is quite safe, however, mixing dry slip into liquid suspension and making plaster molds from dry plaster is quite tricky.
Exposure to these dry powders can be toxic over longer periods, so I’m hoping to get some kind of air filtering for small particles going on…
The room is essentially a small office, 10ft by 10ft by 8ft ceilings (800cf).
My plan is currently three-fold
Wear a p100 respirator - I have this from my glaze mixing days and works as a simple last-line-of-defense PPE tool.
Install a vacuum hose near the work area (mixing containers/open buckets), opposite where I’m located to draw the material away from my eyes/nose/mouth.
Have air cleaning/filtering going on in the room in general. I was looking at things like the powertec air filter that’s in the wood shop, but they only have 1um filters. The particles I’m looking to filter out are much smaller. It would be cool to have a modular setup where you replace filters and change their rating as well (type of particles extracted). I think a solution to this problem can help with other needs too (such as forest fires).
I found this mobile air cleaner kit being used by many woodworkers - Which might be a good starting point for a design Mobile Air Cleaner Cart | Jays Custom Creations. It uses a blower motor from a furnace to circulate air through a box with ~4 furnace filters.
One of the reasons I’m posting this is to seek some advice regarding this whole endeavor
I already have #1 (PPE), among #2 and #3, which one should I prioritize?
If I’m building #3, is there cheap source of blowers/motors - How would I plug that into power? I haven’t used motors like this before…