Why Does Soap Contain Lye?

It is impossible to make soap without lye.  In fact, lye is the essential ingredient in soap making!  Lye causes the chemical reaction known as saponification, the reaction that turns fat and water into soap.  Without lye, we would all just be rubbing oil on our bodies (not a bad idea, but not soap).

Rest assured, however.  There is no lye in the finished product.  I carefully calculate all of my recipes using a minimum of 5% superfatting, which means that all of the lye is used up in the process of saponification and some oils are left unsaponified.  This leaves a more moisturizing bar with zero lye in the final product.

Back to FAQs


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s