Imagine you’re at the grocery store trying to grab a few things before having a few friends over for dinner. You’re making a dish that requires cold-pressed olive oil – okay, no problem.
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You walk your cart over to the baking aisle and find yourself confused when you see a handful of different choices with the words “cold-pressed” and “expeller-pressed” on the packaging. You know that you need cold-pressed, but, is that the same as expeller-pressed?
Expeller-pressed and cold-pressed oils have handfuls of great health benefits, but there are a few differences in the oil extraction process that makes them unique – keep reading to discover those differences!
An expeller press or “screw press,” is a machine that presses seeds and nuts through a cavity and uses intense friction and pressure to extract oil. During this process, there isn’t any added heat but since the seeds are pressed using friction, heat is created (around 140-210˚ F). Once the seeds are pressed, the oil is removed. Commonly, the seeds remain in the press to form a hard “brick” which can later be used as animal feed.
When expeller pressing, it takes a large number of nuts or seeds to create a high yield – which means more money. This is one of the biggest reasons why oil manufacturers aren’t keen on using this method of extraction and instead use methods that include chemicals and high heat.
When pressing seeds or other ingredients to create cold-pressed oils using an oilseed press, less heat is used. The seeds or ingredients are placed in the press and then are crushed by the machine to obtain the oil. Typically, when these ingredients are pressed, they are at a much lower temperature (122˚ F) compared to an expeller press.
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Note: Unlike oilseed presses, absolutely no heat is used when making cold-pressed oils with one of Goodnature’s cold-press machines.
Since these oils are pressed at a lower temperature, they retain their unrefined healthy antioxidants that would otherwise be destroyed when using high-heat methods. Antioxidants can help your body fight against free radicals which can cause cancer and other diseases. Cold-pressed oils are also typically packed with Vitamin E which has healing properties.
The moment when high heat is introduced into the process, this is when the oil loses all of its antioxidants and vitamins. This is commonly seen in “refined” oils which are made by using high temperatures and chemicals such as hexane to extract a high yield in a short period of time.
French’s Innovation Center development laboratory offers a wide variety of testing services. Our pilot scale and semi-works mechanical screw presses, including our Model L-250 Laboratory Screw Press, are used for oil extraction performance trials using cold-pressing or traditional solvent and hexane-free full pressing methods on all types of oil-bearing seeds or nuts, and other liquid-bearing solid materials.
We have processed special seeds and materials in our laboratory, including grape seed, morinda seed, marigold, paprika seed, walnut meats, hemp seed, cuphea seed, lesquerella seed, vernonia seed, corn germ foots, algae, bagasse, apricot kernels, coffee beans, chili peppers, cherry pits, peach pits, and more. In addition, you can utilize our Innovation Center to test various temperatures in full, cold press (free of solvents, like hexane) extraction processing methods and the impact on oil quality.
Plus, we offer confidentiality agreements to ensure that your testing will not to be disclosed to a third party. French performs laboratory testing for many customers, so we understand how important your trade secrets are to your business and we pledge to protect them.
The company is the world’s best cold press machine supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.