2. Heat – Warmth increases movement. Warming a carrier oil, honey, water or sometimes even alcohol increases extraction
3. Agitation – either continuous or intermittent
4. Surface to Volume Ratio – Within reason, the smaller the herb particles, the more surface area is exposed to the solvent. If the herb becomes too fine a powder, like powdered sugar, it can pack tightly and have the opposite effect.
5. Marc to Menstruum Ratio – Within reason, the more marc the better. However, there is a limit to how much a solvent can dissolve and hold.
6. The quality of the herb.
7. The quality of the solvent.
8. The care and mindset of the person creating the pharmacy.