There is very little heat(just room temp) involved with this form of extraction. Pressurized butane is freezing when it exits a can. This is the reason we use it, because it boils off as a gas at room temperature. PVC will degrade with extended exposure to solvents, but can be safely used several times so long as it is cleaned soon after use.
Submitted by Anonymous () on Thu, 10/08/2009 - 13:17.
Butane at Pressure is Near Freezing
There is very little heat(just room temp) involved with this form of extraction. Pressurized butane is freezing when it exits a can. This is the reason we use it, because it boils off as a gas at room temperature. PVC will degrade with extended exposure to solvents, but can be safely used several times so long as it is cleaned soon after use.