Don't know how to "squeeze" the oil out of cannabis, but you can use heat and fractional distillation to extract the oil without chemicals.

The above process is to clean up messy extractions, and not necessary unless your extraction is messy or you just want super pristine oil from a clean extraction.
Graywolf Reviewed by Graywolf on . Getting the Green and Waxes Out Afterwards 273502273500273501 Public opinion appears to be split on the salubriousness of including chlorophyll and other plant water solubles in our extracted oils, so this is written not to stir controversy, but specifically for those of ya'll whom do not wish ingredients other than cannabis in your extracts. Those whom wish to preserve those ingredients are invited to please ignore this posting, rather that debating whether it is a mistake or even a crime against sweet Mary's natural Rating: 5