Glycerin has been used for many things including bombs like TNT but I guess it can be used for making soap. (or I am sure they use glycerin to make commercial soap too)
Here’s a quick way to make some natural soap from glycerin:
Use a 6-quart slow cooker. Do not put the soap mold into your stoneware and add glycerin cubes, and turn it on. The mold will melt. And you will be annoyed when your husband says something along the lines of ‘I thought that might happen.’
What you should do instead is p
