It is the process of extraction of oil from oil seeds (eg. Groundnuts, sunflower seeds, flax seeds, sesame, etc.) by physical crushing and squeezing using mechanical pressing machines, while maintaining the temperature of the seed material and oil under 48°C throughout the entire process.

Wood pressed oils are extracted by mechanical press machines in which the mortar and pestle in which the oilseeds are subjected to crushing and pressing are wooden. 

Coldpressed oils can be extracted from a variety of machines where the components that crush and press the seeds may be wooden/steel/cast iron/stone or any other appropriate material while maintaining the temperature of the oilseed material and the extracted oil under 48°C

It may be noted that the temperature in a wood press is commonly under 48°C due to the low speed of operation and the nature of the wooden material.

All woodpressed oils are coldpressed whereas all coldpressed oils may not be woodpressed.