I made a bit of DHO yesterday, not BHO, I wont use butane, too many nasty bits. DME (Dimethyl Ether) is used in the food and pharmaceutical industries for extractions. It should not come into contact with rubber, silicone ect. Only glass, stainless steel on the extraction. I extracted into a small box made of teflon paper (PTFE)
make a box,I used another box to form the paper
DME can, paper, and homemade blast tube
Frozen trim
blasted the full 500ml can (I only bought the bowl inside to photo, I didn't blast indoors)
An hour later
That was yesterday, I don't have a vacuum to purge in, instead it'll sit in the grow room, on top of my light, and I'll leave it for 24 hours. DME has a much lower evaporation temp than butane, so I'm confident everything has evaporated, I've never tatsted any taint in the final product. I'll get some photos up later, I'll let it sit for a few more hours.