Toasting the clay slabs When buying any type of fimo polymer clay
, always find out if its toxic. Even so, it is good to note that baking non-toxic clay could be risky due to fumes. Make sure that the room where you keep the oven has proper ventilation. Normally, you have to bake fimo clay with a temperature range of 250 degrees F minimum and a maximum of 275 degree F. You should never ignore the directions for baking the clay you purchase. Mostly, the clay has to bake for about thirty minutes.