Once you have finished shaping FIMO, you need to harden the clay. To do this, proceed as follows:
- Preheat the oven to 110°C.
- Line a baking sheet with baking parchment or aluminium foil.
- Leave the modelled item to harden in the oven for 30 minutes.
- For best results, use an oven thermometer to check the temperature during hardening.
Important: FIMO models are only completely hardened once they have cooled down. Once cool, you can also continue working on the modelled pieces (painting, varnishing, polishing, etc.).