This afternoon a friend took me out to Sanxia to visit a tea oil factory. Tea oil is made from the seeds of Camellia oleifera. It can also be made from Camellia sinensis, the plant which tea leaves come from. However, seeds from the former have a higher yield of oil. The picture above shows the tea seeds which are the raw material for making the oil.
The photos below show the process of making the tea oil from the seeds.
I am not sure of the exact process in the machine. But some combination of mechanical motion and heat produces the tea oil.
Gas flame used for heat in the machine.
Raw oil as it comes out of the machine before filtering.
Filtered oil ready for bottling.
Bottles of tea oil on sale in the shop.