Olive press traditional stone

Traditional stone olive press: an ancient method that extracts the best from olives without heat or chemicals.

About this subject

The traditional stone press is one of the oldest methods of olive oil extraction, used since antiquity in the Mediterranean. The process begins by grinding olives in a stone mill, usually powered by animal traction or human force, creating a paste. This paste is then spread onto mats (natural fiber discs) and stacked under a hydraulic or lever press. Gradual pressure extracts the oil slowly, without heating, preserving aromatic compounds and antioxidants.

This method, known as "cold extraction," is valued for producing high-quality oils with fruity flavor and low acidity. Unlike modern continuous presses (centrifuges), the stone press requires more time and labor but maintains centuries-old traditions. In regions like Andalusia (Spain), Tuscany (Italy), and southern Greece, there are still oil mills operating stone presses, often open to tourism.

A curiosity: the stone used for the mill is typically granite or basalt, chosen for its hardness and chemical inertness with oil. Slow friction avoids overheating, keeping temperatures below 27°C. This care is essential for extra virgin oils. Additionally, traditional mats are made of esparto grass or coconut fiber, washed after each use to prevent contamination.

The stone press symbolizes not only a technique but a cultural heritage. In many villages, olive harvesting and pressing are community events. The Food and Agriculture Organization (FAO) recognizes traditional mills as important agricultural heritage. Although less efficient for large productions, the stone press remains the choice of artisan producers seeking excellence.

Frequently Asked Questions

How does a traditional stone press work?

Olives are ground in a stone mill to form a paste. The paste is spread on natural fiber mats, stacked under a press that applies gradual pressure, extracting oil slowly without heat.

What is the difference between a stone press and modern methods?

The stone press is a batch process, slower and manual, better preserving aromas and antioxidants. Modern methods use centrifuges and are continuous, allowing higher production but may heat the oil.

Is olive oil from a stone press better?

Not necessarily, but it is traditional and can produce high-quality oil if done correctly. Cold extraction (below 27°C) is crucial to preserve properties, regardless of the method.