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A press cake is a low-value food item pressed from an oil-producing seed or olive at a rate of one press cake per unit of oil. It is a by-product of the pressing process, consisting of the leftover solids from the base material.
Press cake-producing crops
The following crops produce materials that can be pressed into oil and press cakes:
|Press Cake Name
|Press Cake Value
|rock nut press cake
|cotton seed press cake
|flax seed press cake
|hemp seed press cake
|kenaf seed press cake
To press oil from the various seed crops - all except olives - the seed must first be milled into paste at a millstone or quern. Only this intermediate product can be pressed. Olives can be pressed directly.
|More: Gems • Metals • Stones
|See also: Material science