The calm before carbonation
Preparing the solution
To start the process, we dissolve potassium hydroxide (KOH) flakes in distilled water to make a basic solution. This is then poured in a thin layer on a flat steel tray.
The magic happens here
Capturing CO₂ from the air
The tray sits in a ventilated space for 60–80 hours. During this time, atmospheric CO₂ naturally reacts with the solution to form potassium carbonate (K₂CO₃). As water evaporates, a soft mineral layer begins to develop. This process needs no machinery or electric energy, just patience and diligence.
Air and time do their work
The drying phase
Once it reaches the perfect semi-solid consistency, we carefully scrape it from the tray. By this stage, most of the potassium hydroxide has transformed into potassium carbonate. The remaining mix contains about 10% water and 5% unconverted potassium hydroxide.
Final texture
Harvesting the salt
The harvested salt is stored in sealed containers and later microfiltered to remove any particles. It’s now ready to be used in our CO₂-capturing natural soap formula and brings extra foaminess.