The genuine Marseille soap from Savonnerie Le Sérail is made in a cauldron by hot saponification and follows all the steps of the traditional process, also called the "Marseille process".
 Namely:
 mashing
 leaching
 cooking
 successive washing
 the final processing
 All these steps take a week in vats that can hold 8 tons of soap mass.
 Real Marseille soap with vegetable oil consists of 72% oil, including a mixture of coconut and sunflower oil.
 It contains no perfume, no dyes, no preservatives and no bleach.
 It is a hypoallergenic and natural product and is often recommended by dermatologists or pediatricians.