Soda ash, scientifically referred to as sodium carbonate, is a white, powdery substance that can form on the surface of handmade soap. It often appears as a thin, white film, giving the soap a less visually appealing finish. While soda ash doesn’t affect the soap’s cleaning properties or usability, soap makers generally strive for an aesthetically pleasing final product.
Causes of Soda Ash Formation:
Exposure to Air:
- Soda ash is more likely to form when soap is exposed to air during the curing process. As the soap hardens, it can react with carbon dioxide in the air, resulting in the formation of sodium carbonate on the soap’s surface.
High Water Content:
- Soap batches with high water content are more susceptible to soda ash. Excessive water in the soap can lead to increased air exposure during curing, facilitating the formation of soda ash.
Temperature Fluctuations:
- Rapid temperature changes during the soap-making process can contribute to soda ash formation. Sudden cooling or temperature variations may create an environment conducive to the development of sodium carbonate on the soap.
Prevention Techniques:
Covering the Soap:
- To minimize air exposure, cover the soap with plastic wrap or airtight lids during the curing process. This simple step can significantly reduce the likelihood of soda ash formation.
Reducing Water Content:
- Aim for a balanced water-to-lye ratio in your soap recipe. Ensuring that your soap mixture doesn’t contain excess water will decrease the risk of soda ash.
Controlling Temperatures:
- Maintain stable temperatures throughout the soap-making process. Avoid sudden cooling or heating, as consistent temperatures can help prevent soda ash formation.
Spritzing with Rubbing Alcohol:
- Spritzing the soap’s surface with rubbing alcohol shortly after pouring it into molds can reduce soda ash formation. The alcohol helps create a protective barrier, minimizing exposure to air.
Conclusion:
Soda ash is a common occurrence in soap making, but understanding its causes and implementing prevention techniques can lead to a more visually appealing final product. By covering the soap, controlling water content, stabilizing temperatures, and using rubbing alcohol, soap makers can elevate the aesthetics of their creations. Embrace the art and science of soap making, and let your handmade soaps shine without the interference of soda ash.
Sources:
Explaining and preventing Soda Ash. BrambleBerry. (n.d.). https://www.brambleberry.com/how-to/soap/art0034-explaining-and-preventing-soda-ash.html#:~:text=If%20you%20make%20cold%20process,carbon%20dioxide%20in%20the%20air.
