There are different kinds of oil creation processes and expeller pressed method is one of them. This method is resorted to when one wishes to extract oil from seeds and nuts and other kinds of sources. A mechanical process is usually relied upon or sheer force. There are no chemicals used in this herbal extractor method.
Origin of this method
This is an oil extraction method that has been popular in the olden days before chemical and modern oil extraction methods were in vogue. Oil expulsion in pre modern times was done mainly by crushing and by applying manual pressure. Cranks or mallets were usually used to extract oil in this method. Modern machines on the other hand can guarantee greater extraction. However, in certain cases like alcohol extraction this method might be used to avoid the use of chemical agents. It is also being considered to be healthier for which eco friendly people and organizations opt for this method these days. It is mainly used in case of extracting oils that are sold as edible and meant for human consumption.
The way it works
If you wish to use an herbal extractor method you need to have a mechanical tool which will help you force oil out of vegetables like corn, seeds and nuts. The machines used in this method are unlike the ones used in Organic alcohol extraction. The machines usually have metal plates which are heavy in between which the items are placed. The plates are rotated and pressure is increased in order to extract oil from the base substances. The oil that is released is then collected in a runoff tray. This is then filtered and collected. It is sold directly in this form or could be sold to companies that will filter and refine the same and sell the oil in packaged form. Many plants that run with these machines have several such machines working in tandem.
Downsides
This method is being popularized again in modern times as it ensures that oil is natural and without additives and preservatives. On the other hand, this manual pressing method leads to considerable wastage. The best and modernized machine used in this process can provide only seventy percent oil from the substances which is more compared to other oil extraction methods. This can lead to higher prices of these oils. Again, some argue that the wastage of the base substances is much more by this oil extraction method.
Expeller and cold press compared
Nowadays expeller and cold press oil production methods are often compared. In the latter process, the machines produce oil with maximum extraction without generation of heat. This ensures that nutrition is preserved as well as flavor and color of the ingredients. However, the oils might not be suitable for cooking as the smoking points are easily reached in these substances.
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