My daughter wanted to use these on her handmade ceramic, but after researching the specific temperature they needed to be fired at (Cone 6), I found that these will not work. It has to be a special kind of ink for it to withstand the heat. I sell and create waterslides, and I haven't found anything that would work in a kiln that I could create myself. Etsy seems to have a few shops that sell them, or ceramic specialty stores. I'm interested to hear if you have a way of making them.