Every year Renate embarks on an experimental project. Last year’s was tectonic bowls. To create the colourful cracked surface, Renate first pulls up a cylindrical shape then covers it with black slip. Once this is dry, she coats the outside with a chemical that prevents the clay from stretching. “From then on, you can only work from the inside, pushing the clay out a bit at a time.” The pressure creates cracks on the outside surface, which she fills with coloured ceramic stain. “Sometimes it works and sometimes it doesn’t. If you aren’t careful, it just rips open.” Renate coats the outside with wax to preserve the effect before glazing inside the pot.