Clear when it comes to its color, powerful mainly because of its astringent and antibacterial properties, the Alum Stone has been praised ever since Antiquity for its cosmetic, medicinal or chemical uses. Inspired by the two main benefits of the Christal d'Alun, Osma Laboratoires individualizes itself as the only French manufacturer to select the best potassium alum stones, purify them and manually produce quality grooming products based on the precious ingredient. No matter if you are a beginner wanting to stem a minor razor cut or an expert wanting to experience the bio-certified superior products, the luxurious Alunotherapy line is here to amaze.
In operation since 1957, the alum crystal experts from Osma Laboratories have received the very best appreciation for their no chemicals, no alcohol, no paraben goods. Aiming for a long-lasting daily hygiene using completely organic ingredients, the manual production process involves unmatched experience as well as true dedication. Natural can be modern too: as if the alum block's versatility was not enough to satisfy their buyer's needs, the French company has come up with new ways to adapt to our pretentious times by adding a range of natural ingredients and fragrances as well as novel packaging to their core product, expanding into their Alunotherapy range.
![]() |
Some of the products in the Osma |
With its astringent properties, a bestseller for the French brand, the Osma Laboratories Alum Block made of 100% crystalline alum is a great toner, helping reduce razor burn, also having a nice cooling effect. Because it eases irritation and treats minor cuts it can be a great addition to your every day grooming ritual. Another must have to fit in everybody's shaving kit is the easy to use Osma Laboratories Styptic Pencil, which provides spot treatment with great effects for its small size. There is an important rule that you need not forget when using Osma Laboratories: every alum stone product must be wet before use.
When it comes to antibacterial deodorants, you can pick among the Alunotherapy Deo Stick, Organic Roll-On Deo or the Organic Spray Deo. No matter which one matches your choice, they all are great perspiration regulators, keeping skin dry and battling odor throughout the day. The soothing, moisturizing effects come with smooth fragrances combining aloe, menthol, and witch hazel, all with the benefits of the alum crystal, Mother Nature's mineral elixir.