Cold saponification

A process that respects the environment and your skin

At Marché du Plateau, we’re proud to make our soaps using the traditional cold-saponification method. Ce procédé artisanal, qui préserve les bienfaits des ingrédients naturels utilisés, nécessite seulement deux composants principaux : des huiles ou des beurres qui forment la base grasse du savon, et de la soude, ou hydroxyde de sodium, qui agit comme un agent alcalin.

When these two elements are mixed in the right proportions, a chemical reaction occurs, transforming the oils and soda into a new product: soap. This fascinating transformation process highlights the harmony between science and nature, and is at the heart of our organic and natural soap production philosophy.

The main advantage of cold saponification is that it preserves the beneficial properties of the oils used, unlike the hot saponification method which can degrade certain nutrients. As a result, our soaps retain all the vitamin and antioxidant richness of the organic lavender oils we use, providing your skin with gentle, natural care.

Discover the craftsmanship and authenticity of our products by choosing our cold-saponified soapsa real guarantee of quality and respect for the environment.


At Marché du Plateau, we celebrate the art of cold saponification, a process that transforms fats – vegetable oils and butters – into soap through a delicate chemical reaction. This alchemical journey takes place at low temperatures, generally below 30°C, to preserve the beneficial properties of the ingredients used.

At the heart of this transformation lies the“trace” stage, a crucial moment when the mixture acquires the texture of a soap paste of varying thickness. For the artisan soap-maker, this stage is fundamental, as it enables him to monitor the consistency of the soap and ensure its optimum quality.

This is also when we add the other natural ingredients that make our cold-saponified soaps so rich. Essential oils for their aromatic and therapeutic properties, mineral or plant colorants for a touch of natural color, plant powders for their benefits to the skin, and even honey for its moisturizing and soothing virtues.

Once the soap paste has reached the desired consistency, it is carefully poured into a mold, then placed in a cool place to harden, usually for 24 to 48 hours. This is followed by the“cure“, a period of rest in a dry, airy place for at least 4 weeks. Curing is an essential phase that finalizes saponification, resulting in a soap that is gentler, longer-lasting and more respectful of your skin.

Explore the authenticity and expertise of our cold-saponification process and be seduced by the exceptional quality of our of our natural and organic soaps.

Follow us

Check out our latest posts on Instagram and follow us to keep up to date with the latest news and advice on how to use our products.