yes it's safe, Ive been making oil for a long time...basicaly take your leaves/trim/buds and soak them in acetone or grain alcohol...strain through a coffe filter, then evaporate the acetone out on a electric burner (no open flame stove) people say all different times for the soak I did this one in a frozen ice cream maker bowl for 5 min (acetone and weed mix) then poured into a ball jar, repeat, twice.... then evaporate....when done you can mix weed with the oil or smear oil on the inside of your paper before rolling a fatty. or eat some but be careful