Mechanical devices utilizing a hydraulic press or expeller to extract oils from seeds, nuts, or fruits without the application of external heat constitute a vital segment of the edible oil industry. This process, known as cold pressing, yields higher quality oils retaining their natural flavor, aroma, and nutritional value, as exemplified by extra virgin olive oil or unrefined coconut oil.
Preserving the integrity of delicate oils and their inherent nutrients through minimal processing offers significant advantages. Cold-pressed oils generally contain higher levels of antioxidants, vitamins, and essential fatty acids compared to oils extracted using heat. Historically, this method represents one of the oldest forms of oil extraction, predating modern industrial techniques, and remains a cornerstone of traditional practices in many cultures. The resurgence of consumer interest in natural and minimally processed foods further underscores the importance of this technology in contemporary society.