Overview
Rosemary (cineole) is there to move the scent profile. In a finished balm or oil, it brings a sharp, dry herbal lift that can keep tobacco, leather, woods, and resins from feeling flat or too dense.
At normal use levels, use it to tune the opening and overall finish of the blend. A restrained dose keeps dark accords cleaner and airier; too much can push them toward a sharper barbershop direction.