https://benshane.com/ https://www.patreon.com/benshane https://www.instagram.com/tinkerandthink To have a successful raku firing, where your pieces don't crack (too often), you need a particular kind of clay. You can buy raku clay, but it is also very easy to modify other commercial clays or your own wild clays to work in a raku firing. This video explains the ways you can modify clay to be perfect for raku, and explains some of the theory behind why those modifications work.