reating hamons is a combination of steel, time and temperature. These three, carefully controlled, can create a hamon without any clay. The clay is a way to have a little more say in how the hamon looks-a little. A clay’s only jobs are-be easy to apply, stick to and stay on the blade and insulate it. This product does all of those things well. Hamon 1800 An aid to creating hamons in suitable steels. This is not magic pixie dust- or maybe magic pixie slurry is a better term.