What is the difference between light and dark patchouli essential oil?
The difference between light and dark patchouli essential oil is due to the container in which the oil is steam distilled. The dark patchouli oil is steam distilled in iron vats and the light patchouli is steam distilled in stainless steel vats. Light patchouli oil is also called iron free patchouli oil. Besides the color, the two oils also have slightly different aromas.