How can i dry plasticine?

To dry plasticine, you can expose it to air for several days, but this may not completely harden it, as plasticine is designed to remain pliable. If you need a firmer result, consider using a low-temperature oven (around 200°F or 93°C) for a short period, but monitor it closely to avoid melting. Alternatively, you can try mixing the plasticine with a polymer clay that can be baked for a more permanent finish. Always test a small amount first to see how it reacts.