Originally, Patchouli leaves were collected from Sumatra, baled and shipped to France (later to England and the USA). The main trade was done though Singapore and Penang. The leaves were then distilled on sight in the factories in these countries. Quality was good and easy to control, the oil was fairly light in color. Gradually with the economic development of Indonesia and the excessive costs of transport, production of the oil began to move towards the source. The most famous production area...