As far as the solvent, you could continue to pre-process your rosin as you normally do. The point of the solvent addition is to allow everything to pass through the filters easier, both the "bulk" and polishing filters.
Then you can allow it to evaporate off at room temp in a large, low pan, like a petri dish. Just make sure there is sire directed to the outside.
So there shouldn't be any disruption of the flavors as nothing is heated above their vaporizing temperatures.
I am not a fan of the terpene market secrecy myself.
It just makes me thing two things:
01. This is actually bad shit and they are just trying to sell as much as possible until people get sick.
02. It's made from a really common and cheap ingredient and they don't dare let us know this otherwise we will bitch because then will know they are gouging us.
It's probably #2.
Greed is a hell of a drug.
If the dilutant has no smell, then it isn't made of terpenes.
I am honestly surprised you were able to get a ratio of 0.75:1 through a 0.22 filter.
If you don't mind me asking a few questions I am curious how you were able to do this without multiple filter changes or ruptures.
By any chance do the filters have PTFE membranes?
Did you pull back on the syringe plunger a few times during the filtering to check for back pressure?
Were you able to do this using one or multiple filters?
Did you look at the oil before and after under a microscope to see what was actually removed?
As I said to
@booms111, I am not trying to judge, I am just curious and want to help where I can.