Uploaded October 2021 | Updated September 2026, 2 weeks ago

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For more information on soda ash, read this article on our website: brambleberry.com/how-to/soap/art0034-explaining-and-preventing-soda-ash.html

Soda ash forms when unsaponified lye reacts with naturally-occurring carbon dioxide in the air. It doesn’t affect the final bars and the soap is safe to use. However, it can obscure more intricate designs. It typically shows up on top of soap, but in some cases it can run all the way through. Soda ash can also make the soap feel crumbly. It usually forms within 1-3 days.

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