The great thing about it is that the salt dough sculptures will harden if you leave them out to dry at room temperature. Depending on the size of the pieces, it will take 2 to 7 days to dry completely.
What is the fastest way to harden salt dough?
You can let salt dough air dry or bake it, but microwaving it is the fastest way to dry the dough.
How do you know when salt dough is done?
If cooked too hot or too fast they will crack, brown on the outside and remain doughy on the inside. The key is to dry them slowly, and account for the thickness. You can air dry your pieces if you have the time. Air drying is the best method.