Enfleurage
This is an old method of extracting essential oils and is not commonly
used today. In this method oil or animal fats (usually goat)
spread out over glass plates in a frame. flowers or plant material are
placed on top of the layer of fat and pressed in. Until the aromatic
compounds was imparted to the fat, for days or weeks depending on the
species. Followed the oil is filtered to leave a product called
”Pomade’. then the absolute is obtained by mix the pomade with alcohol
and followed distillation [17, 52]. The depleted material is then
replaced by fresh ones until the fat to enrich with aromatic substances
[53]. The enfleurage process can be done either ”hot” or ”cold”
way. The only difference in the hot process is that the fats are heated
during extraction (figure 7).