Science, Maths & Technology
DIY: Make Your Own Soap
...guide to making soap...Find out more about The Open University's Science courses and qualifications In theory, you can make soap by treating almost any fat or oil with sodium hydroxide or potassium hydroxide (for a 'soft' soap). Some recipes use animal fats like tallow (from beef) or lard (from pork). Others use vegetable oils, like coconut or olive oil. Soapmaking (or...