I have taken enough college chemistry classes to realize that I never could seem to find the useful parts of the chemistry books. Perhaps because they didn't come with those chapters. But here is a small bit of a nifty chemistry which can be done at home to work-around the lack of available lye sources for home soaping.
Read more for a more practical method breakdown. Do home chemistry at your own risk. Never throw salt in your eyes.
What is soda ash? What is hydrated lime?