If you are sculpting a modelling clay creation that you want to harden, it is important to dry the clay in a specific way so that the clay does not crack, split or crumble. If the clay is dried too quickly, it could ruin the entire creation. Luckily, there are a few helpful techniques for drying modelling clay that will enable your sculpture to dry unscathed and be ready for painting.
Place your clay sculpture onto a flat surface.
Wet a sponge, squeeze it out, and place it next to your sculpture.
Loosely cover the sculpture and sponge with cling film.
Allow the sculpture to remain under the cling film to dry. If the sponge dries out, re-wet it and place it back under the cling film.
Once the outside of the clay sculpture is dry to the touch, remove the cling film and let the sculpture air dry.
After two to three days, bake the dried sculpture in a kiln.