Milas Olive Oil Soap: a registered second life for oil unfit for the table

Olive oil soap is usually praised for being made from good oil. The registration document for Milas Olive Oil Soap says the opposite: the raw material is oil that cannot go to the table. According to the document, the soap is boiled from Milas olive oils with an acidity of 6 or higher, and from the sediment that settles at the bottom of oil containers, known locally as "olive oil mud". Low-acidity oil that has become contaminated ("murdar" in local speech) may also be used. In a sense, the registration gives a centuries-old job description to the part of the oil that would otherwise be thrown away.

Reference details

A geographical indication of this type normally requires at least one stage of production to take place in the defined area. This document is stricter: because the product is tied to the place by human skill and reputation, all operations must be carried out within Milas.

The raw material rule

Both methods share one condition: the oil must be olive oil or olive oil mud obtained from Memecik olives in the Milas area. The document counts it as distinctive that olive oil is the only fat used and that no chemical other than caustic soda (sodium hydroxide) goes in. Polishing and colouring are not allowed.

The acidity threshold puts this in context. Olive oil acidity may be at most 0.8 percent for extra virgin and 2 percent for virgin. A value of 6 or more is far above that; such oil could reach the table only after refining. The soap cauldron is a local and much older alternative to the refinery.

Two production methods

According to the document, the hot method is still the common one in Milas villages, while demand for the cold method is growing because the volatile compounds in the oil are not driven off by heat. In the hot method the caustic soda is a quarter of the oil by weight: 15 kilos to 60.

Caustic soda is dangerous. The document itself notes that the fumes from the cold mixture are toxic and must not be inhaled. The quantities above are therefore the procedure the registration defines, not a home recipe.

Moulds, drying and the stamp

The thickened soap is poured onto a flat surface with 5 cm edges or into 8 × 5 × 5 cm moulds. It starts to set within three days at most and is cut into pieces of about 8 × 5 cm. The pieces are left where they are to dry, and the maker's or the company's stamp is struck onto them with a mallet. Lifting them takes another 5-6 days; drying fully can take 2-3 months in winter.

The document's test for readiness is practical: the bar should be hard enough not to give when pressed with a finger, and its surface should not be powdery. It may be sold by weight at markets; cardboard, tin, paper or cloth packaging are all allowed.

What the inspection checks

The inspection body has three representatives: the Milas Chamber of Commerce and Industry, the Milas Olive and Olive Oil Agricultural Sales Cooperative No. 153, and the Milas Chamber of Agriculture. Inspection takes place once a year, and at any time after a complaint. Laboratory analysis can be ordered from an accredited laboratory, at the chamber's expense.

All the criteria are sensory. The document sets no chemical limit for the soap, such as free alkali content; the inspector's hands take the place of a measuring instrument.

The historical record in the document

The document bases the soap's link to the place on three records. According to the 1889 Aydın Province yearbook (salname), the Milas district had 11 oil mills and 1 soap works at the end of the 19th century, producing 30,000-40,000 okka of soap a year. A 1954 source says most Milas soap was shipped to Mersin and İzmir. In the 1990s, branded Milas soaps were sold to provinces that produce no olive oil, such as Kahramanmaraş, Kayseri and Malatya. The wider history of the tradition, alongside Aleppo, Castile and Marseille soaps, is in the history of olive oil soap; how to recognise the real thing on the shelf is in our olive oil soap guide.

The document's sentence on skin

The document states that because olive oil "binds sodium in optimum proportion", the soap irritates the skin less, and that the product is known for its softness. This is the applicant's own description; the document cites no study measuring it. Soap is also not the same as oil applied to the skin: soap is rinsed off and does not stay on.

In short

Milas Olive Oil Soap is a geographical indication built on the same Memecik oil as the separately registered Milas Olive Oil, but it puts to use the part that cannot go to the table. What the document teaches is that it defines quality not by the oil's acidity but by the method: a wood fire, caustic soda only, an uncoloured and unpolished bar, and months of drying.