While Dr. Bronner's is probably the most popular brand of castile soap, there are several others (including Kiss My Face and Kirk's) available in bar and liquid form. Some products are scented ...

Dr. Bronner's Magic Soaps was founded in 1948 and is most famous for its pure-castile soap ... for bar soaps and potassium hydroxide for liquids. In this case, let's do liquid soaps.

Narrator: Here's how four soap factories create their products. Dr. Bronner's Magic Soaps has been around since 1948 and is most famous for its pure castile ... Now for the bar soaps.