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About Laboratoires Osma (France)
Laboratoires Osma
Since 1957, Laboratoires Osma has been the last remaining manufacturer of natural potassium alum blocks in France. A staple of traditional wet shaving, Osma provides the ultimate zero-waste, natural solution for soothing razor burn and stopping minor nicks instantly.
Pure Potassium Alum
Unlike commercial styptic products laden with synthetic chemicals and alcohol, Osma blocks are carved from 100% natural, crystallized potassium alum. Simply run the block under cold water and glide it over the shaved area to instantly tone the skin, close the pores, and neutralize bacteria.
The Tradition Block
The iconic Osma Alum Block is a "Buy-It-For-Life" essential. A single block can last for years, replacing countless bottles of synthetic aftershave.
Styptic Pencils
Precision natural alum pencils designed to immediately halt bleeding from minor nicks and cuts during a safety razor or straight razor shave.
Handcrafted in France
Subjected to strict French cosmetic regulations, ensuring a purely natural, hypoallergenic product that is safe for the most sensitive skin.