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Types of Castor Oil

How Various Types of Castor Oil Are Made


Editor’s Note: Content is updated with additional information under the section, “What Type of Castor Oil Should You Choose?

Types of Castor Oil

Did you know that a single castor seed is about 40 to 60 percent castor oil? This valuable oil has tons of uses for beauty and personal care. With the different methods employed to obtain it, comes the different types of castor oil. They are used in different castor oil-based products rich in essential nutrients for keeping hair and skin healthy.

Applying castor oil to the skin creates a flawless complexion. It keeps hair shiny and strong. It thickens eyelashes and eyebrows too. The multiple castor oil benefits include nail growth, and arthritis and body pains relief.

All these benefits from castor oil account to its high concentration of ricinoleic acid, making up an average of 90% of the oil. This natural compound carries anti-inflammatory and antibacterial properties. It supports hair growth and cell repair too. There are vitamin E and protein in castor oil as well. When choosing castor oil products, the amount of these nutrients greatly depends on the type of castor oil.


    Castor Oil Production

    Castor oil comes from the seeds of the castor oil plant, scientifically known as Ricinus communis. It is grown commercially on plantations for castor oil production. Upon maturity, the plant produces seeds, which are oval and brown. Harvesters take these seeds and the first step in the process of castor oil production begins.

    Castor Plant


    Collecting the seeds requires proper timing. Otherwise, the pods may burst open and shoot the seeds randomly on the ground. Brown and dry fruits indicate that they are ready for harvesting. The entire clump is cut and the fruits are gathered. They are dried further until the pods open and the seeds come out by themselves.

    Cleaning the seeds removes leaves, twigs, and other foreign materials from it. Then they are cooked, dried, and prepressed to prepare them for extraction.


    The different methods of extracting castor oil are mechanical pressing, solvent extraction, and combination method.

    Mechanical pressing uses machines such as hydraulic presses and continuous screw presses to force the oil out of the seed’s meat.

    Solvent extraction uses chemicals and solvents such as heptane, hexane, or petroleum ether. These substances can introduce impurities to the finished product. Although this is the faster and cheaper method of extraction, the result is a low-quality product. It compromises the oil’s purity and the amount of beneficial compounds.

    In the combination method, the seeds undergo mechanical pressing first. Then further extraction of oil from the leftover castor oil is done through solvent extraction method.

    Filtration & Purification

    The filtration and purification processes ensure that the end-product is pure castor oil. This stage uses a filter press to remove pollutants, water, and dissolved gases. The filtered oil is called crude or unrefined oil.


    A refinery procedure often involves degumming, neutralization, bleaching, and deodorization. Not all manufacturers employ this stage because it reduces the oil’s therapeutic properties. Indications of this lower quality could be the oil’s lack of distinct earthy odor and a pale color. This characteristic is common for refined types of castor oil.

    Castor Oil Production Flow Diagram

    Castor oil production is a very typical process of taking essential oil from seeds. Learn about the other types of seeds essential oils and their remarkable benefits and uses.

    Different Types of Castor Oil Products

    Castor oil comes from the seeds of the castor plant, which is common in tropical and subtropical places. It can be found almost anywhere in the world as long as the climate permits. With its diversity of uses, worldwide presence, and various methods of extraction, different types of castor oil also emerged. Get to know them better and see which one seems to fit your needs:

    Jamaican Black Castor Oil

    To produce Jamaican black castor oil, the seeds should undergo roasting first. This gives the oil a dark color and burnt smell. This method is common in Jamaica. Thus, the name Jamaican black castor oil. It has higher purifying properties due to higher pH level, resulting from the roasting of castor seeds. This feature may increase the castor oil benefits for reducing acne and cleansing scalp.

    Hydrogenated Castor Oil

    Adding hydrogen to the oil yields hydrogenated castor oil or castor wax. This is a hardened and brittle version of castor oil that does not dissolve in water.  It’s a common ingredient for cosmetics. Products like lotions and creams use it for emollient and thickening purposes. Many commercial applications use this formulation to resist oil and moisture. Examples are waxes, candles, and crayons. It has valuable uses for paper coatings and manufacturing greases as well.

    Chemical Extracted Castor Oil

    Chemical extracted castor oil may be cheaper than other types of castor oil. This involves solvents such as heptane and hexane. Solvent extraction is typically the fastest and cheapest way of obtaining the oil from the seeds. The result could be low quality product due to chemical impurities.

    Cold Pressed Castor Oil

    Cold pressed castor oil is made by pressing organic castor seeds with no heat involved. Thus, the term cold pressed. Without heat, there is a lower risk of degrading the oil’s natural healing properties. Users get the maximum benefits when using cold pressed castor oil. A cold pressed castor oil could be refined or unrefined. Unrefined castor oil is more concentrated. It is yellowish and thicker in texture.

    Types of Castor Oil

    What Type of Castor Oil Should You Choose?

    Among the different types of castor oil, which one should you pick? The answer always depends on your needs and preferences. However, the best option would be to use 100% cold pressed castor oil. Not only does it contain the highest amount of nutrients than any other types of castor oil. It comes from organic castor seeds as well.

    Updated Content:

    Castor Oil Products Classified By Purity

    Other types of castor oil are classified under categories depending on their purity. Terms such as cold-pressed, unrefined, raw, pure, and organic are often used in marketing castor oil. Here are the differences of castor oil products based on their purity:

    • Cold-Pressed

    As stated above, cold-pressed castor oil goes through extraction that uses a mechanical device. There is no heat used in this process. Grinding or extracting the seeds might produce minimal heat that never exceeds 49°C or 120°F. Extraction is done in a controlled temperature setting.

    • Organic

    Organic castor oil is pure and does not contain any type of chemical. Organic oils use ingredients grown by farmers who do not introduce pesticides or other chemicals to plants. Organic oils do not go under refining. Refining uses chemicals or solvents to add or remove certain characteristics of castor oil.

    • Unrefined

    Unrefined castor oils are products of cold-pressing that do not undergo extra processes of refinement. When you add or remove certain elements of castor oil such as color, taste, or scent, this means that it is refined. Under the term unrefined, you’ll find other classifications such as virgin, extra virgin, raw or pure. The difference among these terms is the number of times the oil is pressed. Extra virgin castor oil is the product of the first pressing, which means that it has the strongest flavor, scent, and most vivid color among all types of castor seed extracts.

    Pure cold pressed castor oil has a multitude of surprising uses for hair, face, and body. While you can use it on its own, you can also use it for oil blends and as a carrier oil. With every use, you are certain that your product is safe and effective. Experience various castor oil benefits for hair and skin. Make it a part of your daily personal care routine for a healthier you.

    Once you picked your favorite castor oil among these types of castor oil, it’s time to look for the best brand of the various types of castor oil that you need. Castor Oil Review brings you a list of today’s leading and most popular castor oil brands!

    Erina Ivanova

    I’m a little shy and awkward but I rely on my outfit and overall appearance to speak for me. I am obsessed with taking care of myself. That’s why I love researching about different hair and skin care products. My friends describe me as a huge nerd who happened to be somewhat attractive.

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