They are then subjected to intense pressure in a screw press or hydraulic press, forcing the liquid oil out of the solid pulp, known as the "cake. Ingesting a single raw castor bean can cause severe poisoning.
The Step-by-Step Process of Turning Castor Beans Into Oil
It is a robust, perennial shrub often grown as an annual in temperate climates, reaching heights of up to 12 meters in the wild. Farmers must monitor the pods closely, as they turn from green to a brownish-gray and begin to split open.
This high concentration of ricinoleic acid is what differentiates castor oil from other vegetable oils and gives it its remarkable versatility. This portion contains between 40% and 60% oil by weight, along with a complex array of triglycerides.
From Castor Beans to Oil: The Manufacturing Process
It is the endosperm—the thick, fleshy part of the seed—that holds the key. The bean is actually a drupe, consisting of three layers: the outer hull, the middle oil-rich endosperm, and the inner embryo.
More About What castor oil is made from
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