The film details the process of soap making, starting with Carl Mason's laboratory demonstration using fat and sodium hydroxide (lye). It explains the chemical reaction known as saponification, where ...

It’s possible to make bar soap at home using ingredients such as lye and oils. Following a recipe and knowing which precautions to take can help make bar soap making a fun and generally safe activity.

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...