The Laboratoires Osma are the last manufacturers of alum stones in France. They manufacture for more than 50 years products with a natural alum potassium basis. A purified alum and hand made in their workshops. The Laboratoires Osma pay attention to the elaboration of their formula: natural and efficient ingredients, guarantying comfort of use and respect of the body. Thanks to a rigorous selection of raw materials, Laboratoires Osma propose labelled products: roll-on deodorants with alum, Ecocert and Cosmebio organic certified, creams for feet with alum, Qualité France and Cosmébio certified.