BLOG — soap-based shampoo bar
In short, saponification is defined by Merriam-Webster as ‘the act, process, or result of making soap: conversion into soap’. In order to achieve a solid bar of soap, you will need to mix fats and oils with a sodium or potassium hydroxide.
The other incredibly important thing to consider is that shampoo/soap bars that do not contain sodium hydroxide/caustic soda/lye are not natural. These are what are referred to as syndet bars, we’ve written extensively about the difference between natural and syndet bars here. Moreover, the word syndet is derived from the words synthetic and detergent.
In short, soap-based are made from natural oils whereas syndet based bars are basically solidified liquid shampoo. They each serve different purposes and we're going to give you the low down on how to find the best shampoo bar for you.